CA1132238A - Electrical signal transmission equipment bay - Google Patents
Electrical signal transmission equipment bayInfo
- Publication number
- CA1132238A CA1132238A CA333,918A CA333918A CA1132238A CA 1132238 A CA1132238 A CA 1132238A CA 333918 A CA333918 A CA 333918A CA 1132238 A CA1132238 A CA 1132238A
- Authority
- CA
- Canada
- Prior art keywords
- bay
- positioning plate
- connectors
- mounting beam
- supporting beams
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 230000008054 signal transmission Effects 0.000 title claims abstract description 5
- 238000012545 processing Methods 0.000 claims abstract description 35
- 230000008093 supporting effect Effects 0.000 claims abstract description 30
- 230000013011 mating Effects 0.000 claims description 10
- 210000005069 ears Anatomy 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 5
- 239000000725 suspension Substances 0.000 claims description 2
- 238000003780 insertion Methods 0.000 claims 1
- 230000037431 insertion Effects 0.000 claims 1
- 239000000306 component Substances 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229920000136 polysorbate Polymers 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 230000002311 subsequent effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R24/00—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure
- H01R24/38—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure having concentrically or coaxially arranged contacts
- H01R24/40—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure having concentrically or coaxially arranged contacts specially adapted for high frequency
- H01R24/52—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure having concentrically or coaxially arranged contacts specially adapted for high frequency mounted in or to a panel or structure
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/14—Mounting supporting structure in casing or on frame or rack
- H05K7/1438—Back panels or connecting means therefor; Terminals; Coding means to avoid wrong insertion
- H05K7/1447—External wirings; Wiring ducts; Laying cables
- H05K7/1449—External wirings; Wiring ducts; Laying cables with connections to the back board
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/46—Bases; Cases
- H01R13/516—Means for holding or embracing insulating body, e.g. casing, hoods
- H01R13/518—Means for holding or embracing insulating body, e.g. casing, hoods for holding or embracing several coupling parts, e.g. frames
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/62—Means for facilitating engagement or disengagement of coupling parts or for holding them in engagement
- H01R13/629—Additional means for facilitating engagement or disengagement of coupling parts, e.g. aligning or guiding means, levers, gas pressure electrical locking indicators, manufacturing tolerances
- H01R13/631—Additional means for facilitating engagement or disengagement of coupling parts, e.g. aligning or guiding means, levers, gas pressure electrical locking indicators, manufacturing tolerances for engagement only
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R2103/00—Two poles
Abstract
1 PHN. 9212.
ABSTRACT:
An electrical signal transmission equipment bay, comprising a number of ingoing and outgoing cables which are connected to signal processing boards contained in functional units by means of row connectors and coaxial connectors, said coaxial connectors being prepositioned during mounting in openings of a displaceable mounting beam in order to make said coaxial connectors readily accessible during mounting, said mounting beam being sub-sequently secured to a positioning plate which comprises openings wherethrough the coaxial connectors are inserted, said positioning plate being subsequently rigidly con-nected to supporting beams in the bay. The bay is parti-cularly suitable for use in telephone exchanges.
ABSTRACT:
An electrical signal transmission equipment bay, comprising a number of ingoing and outgoing cables which are connected to signal processing boards contained in functional units by means of row connectors and coaxial connectors, said coaxial connectors being prepositioned during mounting in openings of a displaceable mounting beam in order to make said coaxial connectors readily accessible during mounting, said mounting beam being sub-sequently secured to a positioning plate which comprises openings wherethrough the coaxial connectors are inserted, said positioning plate being subsequently rigidly con-nected to supporting beams in the bay. The bay is parti-cularly suitable for use in telephone exchanges.
Description
. ~ .
1~3223~3 `
: ~Electrical signal transmission equipment bay~'.
: . .
- The invention relates to an electrical signal trans-mission equipment bay, comprising two parallel supporting beams wherebetween cable guide beams e~tend which are di-rec-ted transversely of the supporting beams and which are situated in a first vertical plane, and also cables,going into and out of the bay, which are guided along the cable . guide beams and which extend mainly parallel to the sup-porting beams inside the bay, the ends of a number of said ~: cables being provided with a row connector for electrical ~:~ 10 connection to one of a number of plug-in signal processing boards, each accommodated in one of a number of functional units accommodated in the bay, via successively a row con-nector which is situated on a positioning plate for the : respective functional unit, a master printed wiring board ; ~ 15 which is connected to the ~ositioning plate, and a further row connector which is connected to the positioning plate and into which that signal processing board is plugged.
. In a known bay of the described kind (Philips ~e-comn1unication Review~ Vol. 33, No. 3, September 1975, page 145), the positioning plate is provided with row connec~
tors for so-termed low-frequency ingoing and outgoing sta-tion cables, as well as with row connectors for low-fre-quency.connections between the signaI processing boards in a functional unit. As a result of the miniaturlsation of .:
., . .. .... , .............................. ,, ,, . ~ , . . .
31~
the signal processing boards, the number of signal proces-sing boards per ~unctional unit has increased and hence al-so the number of ingoing and outgoing station cables. The space between the cable guide beams and the positioning plate is thus occupied by ingoing and outgoing cables to such an extent that the accessibility of the cable ends provided with connectors is more differen-t, and also the movability of the cable ends is substantially decreased This movability and accessibility should be optimum for suitable connection of the connectors to the positioning plate in the comparatively srnall working space.
The problem concernïng the connection of connectors has become still more significant since now, in addition to the low-frequency cables, use is also made of high-fre-quency cables of the coaxial type whose cable ends are pro-vided with coaxial connectors. These coaxial connectors are to be secured on the positioning plate on which a con-nection is established with mating coaxial connectors pro-vided on the signal processing boards. Because the so-ter-20 med plugging tolerance of coaxial connectors is subctantial-ly smaller than:the plugging tolerance for row connectors (in the low-frequency part of -the positioning plate), it is difficult in the available small height working spaces between already mounted functional units to align the co-axial connectors on the cable ends so -that their centres coin~de with the centres of the mating coaxial connectors on the signal processing b~rds.
The invention has for its object to provide a bay in which the alignment of the coaxial connectors and mati~g connectors is facilitated, whilst said connectors are also readily accessible at the same time.
To this end, the inven-tion is characterized in that between the supporting beams there is provided at least one mounting beam which extends transversely of the sup-porting beams and on which aré positioned a number of co-axial connectors each connected to the end of one of the cables, said coaxial connectors cooperating, via a number ~3~3~
of openings in said positioning plate, with a number of ma-ting coaxial connec-tors which are provided on the signal processing boards in the respective func-tional unit, said mounting beam being adapted for detachable suspension from the supporting beams during -the positioning of said coaxial connectors on the mounting beam, and being adap-ted for sub sequent rigid connec-tion to the positioning pla-te prior to rigid cormection of the positioning pla-te to the suppor-ting beams.
Because the mounting beam prealigns the coaxial con-nectors with respect-~ the aper-tures in the positioning plate, suitable mounting oY the positioning plate is pos-sible, followed by easy mounting of the signal processing boards in the functional uni-ts.
In order to prevent accurate positioning of the hole pattern in the positioning plate with respect to the hole pattern in the mounting beam from increasing the cost during the punching process, a preferred embodiment of the bay is characterized in that the mounting beam as well as - 20 the positioning plate is provided with openings wherethro~
the coaxial connectors are inserted with clearance.
The invention will be described in detail hereinaf-ter with reference to the accompanying diagrammatic dra-wing.
Fig. 1 is a perspective view of a known bay, Fig. 2 is a perspective view of a preferred embodi-ment of a bay in accordance with the invention, Fig. 3 is a ver-tical sectional view across the po-sitioning plate and -the mounting beam of the bay shown in fig. 2, Fig. 4 i9 a horizontal sectional view, taken along the line IV-IV in fig~ 3, Fig. 5 is a view of one half of a positioning plate, Fig. 6 is an underview of the positioning plate shown in fig. 5, Fig. 7 is a plan view of the positioning plate shown in fig. 5, .
~3Z2~
L~
Fig. 8 is a side elevation of the positioning plate shown in fig. 5, Fig. 9 is a longitudinal sectional view at an in-creased scale of a coaxial connection used in a bay as shown in Fig. 2, and Fig. 10 is a perspective view of two functional units used in a bay as shown in fig. 2, a cooling clevice being arranged on top of each functional unit.
The known bay shown in fig. 1 comprises -two metal supporting beams 1 and 3 which extend parallel to each other and which have an L-shaped transverse profile, said beams being secured to reltevant vertical columns 5 and 7 which form a lateral as well as a rear boundary of the bay.
Between the supporting beams 1 and 3 there are provided a number o~ horizontal cable guide beams 9 which comprise brackets 11 and pins l3 for guiding station cables 15 go-ing into and out of the bay and so-termed internal cables 17 which inter alia serve for the power supply of signal processing ~oards 19 (only one signal processing board is visible). The cables 15 and 17 extend mainly parallel to the supporting beams 1 and 3 and are uniformly distributed over the entire width of the bay when the bay is fully oc-; cupied. The cables 15 are provided near their ends with row connectors 21 of a customary type, whilst the cables 17 are provided near their ends with row connectors 23 whichare also of a customary type. The row connectors 21 and 23 of a section of the bay which is not yet occupied by a functional unit 25 are connected for the time being to a horizontal parking beam 27 screwed onto the supporting beams 1 and 3. Before a section of the bay is occupied by a functional unit 25, the relevant row connectors are de tached from the relevant parking beam. In the present case, a section which is situated underneath the parking beam 27 is occupied. To this end, inter alia relevan-t row connec-tors 29 are detached from a parking beam 31 and are subse-quently inserted through a window 33 in a metal position-ing plate 35. On the positioning plate 35 there are pro-, ~ .. ......
. . .
~ .
~L3223~
vided row connectors 37 whereto the row connectors 29 areconnected. The positioning p:late 35 is secllred to the sup-porting beams 1 and 3 only after all relevant, previously parked row connectors have been inserted through the rele-vant windows of the position:ing plate. Subsequen-tly, these connectors are connected to the relevant row connectors on the posi-tioning plate.
The functional unit 25 is mounted on the positioning plate 35 after the posi-tioning pla-te 3S has been moun-ted on the supporting beams 1 and 3. The functional unit can thenbe filled with a number of signal processing b~rds only the signal processing board 19 thereof being shown for the sake of simplicity. The functional unit 25 comprises gui-des 39 for the sliding and plugging of the signal proces sing boards 19. The signal processing boards 19 comprise a printed wiring board on which a number of electrical compo-- nents are mounted for the processing of electrical signals.
In the present case, concerning bays intended for telepho-ny, said components act on speech signals. On the positio-ning plate 35 a row connector 41 is provided for each sig-nal processing board 19. The signal processing boards 19 are provided with a known plug section (not shown) which is inserted into the row connectors 41. On the rear of the positioning plate 35 there is provided a master board 43 which is mounted on the positioning plate and which is pro-vided on both sides with printed wiring and also with pla-ted-through holes. All row connectors (37 and 41) moun-ted on the positioning plate 35 comprise connection pins which are inserted, through openings in the positioning plate 35, into the plated-through holes of the master board 43. The electrical connection of these connection pins to -the mas-ter board 43 is realized in one operation by wave-solde-ring before the mounting of the po.sitioning plate 35. The master boarcl 43 comprises recesses 45 for inserting the row connectors 29.
Due to the use of coa~ial cables which are suitable - for high frequencies and whose ends are provided with co-~::IL3Z23~3 axial connectors, these coaxial connectors must be inser-ted through openings in the positioning plate for electri-cal connection to mating coaxial connectors provided on - the signal processing boards 19. Contrary -to row connectors, these coaxial connectors and mating connectors rnust be very accurately aligned in order to prevent damaging of the con-tact pins and the contact sockets. During the moun-ting of the positioning plate 35 on the supporting beams 1 and 3, however, hardly any space remains behind the posi-tioning plate 35 for the maneuvering of the coaxial connectors.
In the bay in accordance with the invention which is des-cribed hereinafter, the problem described with reference to the known bay is solved. The parts of the bay in accor-dance with the invention which correspond to the known bay are denoted by corresponding reference numerals (fig. 1) and are not elaborated Por the sake of brevity.
The coaxial part of the station cables going into and out of the bay shown in fig. 2 is shown at the left.
Underneath the parking beam 31 there is provided a hori-zontal mounting beam 47 of sheet metal ~for example, steel3.In the case of a plurality of sections which correspond to a plurality of functional units 25 of a bay, there is a repetitious pattern of mounting beams extending between two parking beams. For example, a mounting beam 49 is si-tuated between the parking beams 27 and 31. The mountingbeam 47 is bent a-t right angles twice near its left as well as near its right end, so that ears 51 and 53 are formed.
In each of the ears 51 and 53 there is provided a recess 55, so that the mounting beam 47 can be loosely suspended from pins 57 screwed into the supporting beams 1 and 3.
The size of the recess 55 and the diameter of the pin 57 are matched so that the mounting beam 47 can be shifted to the lef`t as well as to the right and upwards and downwards with respect to the pins 57. Preferably, use is made of a pin in the form of a so-termed shouldered bolt (bolt com-prising a head and an a~utment shoulder) which is screwed into the supporting beams 1 and 3 only so far that the ,, .. , . . - I
f,,.
~3223~3 ears 51 and 53 can still be slid forwards and backwards be-tween the said head and the supporting beams 1 and 3. Ob-viously, the mounting beam L~7 can be suspended in a dis-placeable manner from the supporting beams 1 and 3 in a variety of ways. The descr:ibed method, u-tilizing the ears 51 and 53 which are formed by bending at righ-t angles twice, offers -the advantage that the ears 51 and 53 also provide adequate space for the cables behind -the mounting beam. After having been suspended, the mounting beam 47 can thus be tilted and slid in all directions. The mounting beam 47 is provided with a regular pattern of holes 59. The ends of the coaxial cables 15 are provided with coaxial con-nectors 61 which can be inserted through the holes 59 with a clearance. In the lower part of the positioning plate 35 there is provided a pattern of holes 63 which corresponds to the pattern of holes 59 in the mounting beam 47. When the positioning plate 35 is mounted, the coaxial connec-tors 61 also project with a clearance through the holes 63 in the positioning plate 35. Coaxial connectors 65 which mate with the coaxial connectors 61 are mounted on the sig-nal processing boards 19 (see fig. 3) by means of L-shaped strips 67 which are secured on the signal processing boa~s 19. A coaxial connector 61 and the mating coaxial connec-tor 65 each time for a coaxial connection 69, the details of which will be described with reference to fig. 9.
The figs. 2, 3 and 5 clearly show that the posi-tioning plate 35 is subdivided into three sectors. Procee-ding from the bottom upwards, there is provided a first sector which comprises the pattern of holes 63 for the co-axial connectors 61 which form coaxial connections 69(see fig. 9) in conjunction witn the mating coaxial connec-tors 65 (see fig. 3), said connections 69 being present in the coaxial station cables 15 going into and out of the bay. The coaxial connections 69 are usually installed at the site of a bay, so that the accessibility of these con-nections must be optimum for mounting. Above the pattern of holes 63 there is provided a further pattern of holes `:
1~3Z~3~
(not shown in fig. 5 f`or the sake of simplicity) for in-serting coaxial con~ectors 71 which are connected to ma-ting coaxial connectors 73 which are provided on the L-shaped strips 67 of the signal processing boards 19. The coaxial connectors 71 and the mating coaxial connectors 73 together form coaxial connections of` the sarne type as the coaxial connections 69 (see fig. 9) and are used for interconnecting the signal processing boards 19 of the same functional unit 25. This is realized by means of co-axial cables 75 (see fig. 3) which extend substantiallyhorizontally behind the positioning plate 35. In fig. 3, the coaxial cables 75 have been turned one quarter of a turn in order to make them visible. The third and upper section of the positioning plate 35 is occupi~l by the low-f`requency row connectors ~i1 in which the signal processingboards 19 are plugged by way of row connectors 77 if pre-sent. The row connectors 41 are connected, via the master board 43 (see fig. 3), `to the row connectors 37 wh~ ch are also situated in the third section. The row connectors 37 are connected, by way of row connectors 79 (see fig. 2) in-serted through the windows 33, to cables 81. The cables 81 serve for low-frequency connections going into and out of the bay. The cables 81, however, may also include cables for low-frequency connections between the signal proces-sing boards 19 of one and the same functional unit (forexample, the cables 17 in fig. 1).
The coaxial connectors 61 are mounted on the moun-ting beam 47 before the mounting beam 47 is suspended from the pins 57, so that optimum accessibility and maneu~era-bility of the connectors is obtained. This is also partlydue to the fact that the height (in the vertical direction in the mounted condition) of the mounting beam 47 is sub-stantially smaller than the height of the positioning plate 35 which is to be mounted at a la-ter stage. After all co-axial connectors 61 have been secured on the mounting beam~17, the beam is suspended from the pins 57. Because the po-sitioning plate 35 itself is aligned again with respect to ..... . . . . .
:, ' f' L3~38 the mounting beam 47, the coaxial connectors 61 have th-us been prealigned with respect to the pattern of holes 63 in the positioning pla-te 35. Because the functional unit 25 itself is aligned again with respect to -the positioning plate 35, the coaxial connectors have also been prealigned with respect to the mating coaxial connectors 65 which are situated on the signal processing boards 19 which are to be slid into the f'unctional unit 25 at a later stage. The a-lignment of the posi-tioning pla-te 35 with respect to the suspended mounting beam ~7 is realised by means of' ali.gn-ment tags 83 and 85 which are formed on the mounting beam 47 and which fit in relevant holes 87 and 89 provided in the positioning plate 35 (see figs. 2 and 5). A third a-lignment tag 91 of the mounting beam 47 fits in a hole 93 of the positioning plate 35. After alignment of the posi-tioning plate 35 with respect to the mounting beam 47, the mounting beam which is still movably suspended from the pins 57 is screned to the positioning plate 35. This is effected by means of at least two screws 95 and 97 which are screwed into threaded holes in the mounting beam 47.
Only one threaded hole 99 is visible in fig. 2. The align-ment of the f`unctional unit 25 with respect to the posi-tioning plate 35 is realised by means of an alignment tag 101 which is punched from -the positioning plate 35 and which fits in a slot 102 for~med in the bot-tom plate of' the functional unit 25. After the positioning plate 35 has been secured to the mounting beam 47, the positioning plate 35 is screwed to the supporting beams 1 and 3 by means of screws 103 which are secured in the positioning plate 35 at the left (not visible) as well as at the right and which are prevented from falling out of the positionirg plate 35 by means of' threaded bushes 105 which also deter-mine the distance between the positioning plate 35 and the supporting beams 1 and 3. Subsequently, the f'unctional unit 25 is screwed to the positioning pla-te 35, af'ter which the signal processing boards 19 are inserted into the functional unit 35. Simultaneously per signal proces-slng board 19, the row connectors 77 are connected to the ' : ----- ~ , . . .
~'1 .~` 113223~3 row connectors ~11, the mating coaxial connectors 73 are connected to the coaxial connectors 71, and the matin~ co-axial connectors 65 are connected to the coaxial connectors 61 (see fig. 3).
In order to prevent the extremely small manufactu-ring tolerances of notably the positioning plate 35 and the mounting beam l~7 from having a cost-increasing effect;, a given clearance is provided between the coaxial connec-tors 61 and the holes 59 and 63 in the mounting beam L~7 and the positioning plate 35, respectively. This clearance is denoted by the reference numeral 107 for the positioning plate 35 and by the reference numeral 109 for -the mounting peam 47 in fig. 9. In principle, the clearances 107 and 109 may be -the same. Obviously, said clearances are also attuned to the permissible plugging tolerance of the co-axial connectors. The coaxial connection 69, formed by the connection of the coaxial pin connector 61 to the coaxial socket connector 65 as well as by the bushes 110 and 112 is of a customary construction. However, of essential im-portance are the clearances 107 and 109 for the outer parts ; o~ the connection which project through the positioning plate 35 and the mounting beam ~7. It is also to be noted that, after the said connection has been established, it is not necessary to eliminate the lateral slidability in 25 the holes 63 and 65 by the tightening of a nut 111 and a spacing bush 113. It is sufficient to lightly lighten the nut 111 and the bush 113.
The increased data flow percable and the increased miniaturisation of -the electrical components on the signal processing boards 19 have given rise to a greater develop-ment of heat than previously in the functional units 25.
- Because the signal processing boards 19 are vertically ar-ranged in the functional units 25 (see fig. 1) and because the functional units 25 are provided with circulation aper-tures 115 (see fig. 10), use can be made of the naturaldraught of heated air. If necessary, this natural draught can be supplemented by forced cooling. r`orced cooling of .
'' ' I .
. ~
1~3;2~38 this kind, however, is not necessary in a considerable number of cases, if, like in a preferred embodiment of the described bay, use is made of a roof-shaped guiding device 117 which is mounted each -time between two functional units 25 and which serves as a cooling device. The comparatively cold air entering in accordance with -the arrows 119 can - rise between the signal processing boards 19 (not shown for the sake of simplicity) according to the broken lines 121, and can escape according to the arrow 125 through a window 1Z3 in the guiding devlce 117.
It will be clear that the bay in accordance with the invention is not restricted to a given type of cable such as said coaxial cables. Fibre-optic telecommunication cables presently being developed can also be advantageous-ly used in the described bay. The alignment of the like-; wise coaxial connector parts is of major impor-tance f,or such a type of cable.
', ' ' , , .
- s .. . . . .
1~3223~3 `
: ~Electrical signal transmission equipment bay~'.
: . .
- The invention relates to an electrical signal trans-mission equipment bay, comprising two parallel supporting beams wherebetween cable guide beams e~tend which are di-rec-ted transversely of the supporting beams and which are situated in a first vertical plane, and also cables,going into and out of the bay, which are guided along the cable . guide beams and which extend mainly parallel to the sup-porting beams inside the bay, the ends of a number of said ~: cables being provided with a row connector for electrical ~:~ 10 connection to one of a number of plug-in signal processing boards, each accommodated in one of a number of functional units accommodated in the bay, via successively a row con-nector which is situated on a positioning plate for the : respective functional unit, a master printed wiring board ; ~ 15 which is connected to the ~ositioning plate, and a further row connector which is connected to the positioning plate and into which that signal processing board is plugged.
. In a known bay of the described kind (Philips ~e-comn1unication Review~ Vol. 33, No. 3, September 1975, page 145), the positioning plate is provided with row connec~
tors for so-termed low-frequency ingoing and outgoing sta-tion cables, as well as with row connectors for low-fre-quency.connections between the signaI processing boards in a functional unit. As a result of the miniaturlsation of .:
., . .. .... , .............................. ,, ,, . ~ , . . .
31~
the signal processing boards, the number of signal proces-sing boards per ~unctional unit has increased and hence al-so the number of ingoing and outgoing station cables. The space between the cable guide beams and the positioning plate is thus occupied by ingoing and outgoing cables to such an extent that the accessibility of the cable ends provided with connectors is more differen-t, and also the movability of the cable ends is substantially decreased This movability and accessibility should be optimum for suitable connection of the connectors to the positioning plate in the comparatively srnall working space.
The problem concernïng the connection of connectors has become still more significant since now, in addition to the low-frequency cables, use is also made of high-fre-quency cables of the coaxial type whose cable ends are pro-vided with coaxial connectors. These coaxial connectors are to be secured on the positioning plate on which a con-nection is established with mating coaxial connectors pro-vided on the signal processing boards. Because the so-ter-20 med plugging tolerance of coaxial connectors is subctantial-ly smaller than:the plugging tolerance for row connectors (in the low-frequency part of -the positioning plate), it is difficult in the available small height working spaces between already mounted functional units to align the co-axial connectors on the cable ends so -that their centres coin~de with the centres of the mating coaxial connectors on the signal processing b~rds.
The invention has for its object to provide a bay in which the alignment of the coaxial connectors and mati~g connectors is facilitated, whilst said connectors are also readily accessible at the same time.
To this end, the inven-tion is characterized in that between the supporting beams there is provided at least one mounting beam which extends transversely of the sup-porting beams and on which aré positioned a number of co-axial connectors each connected to the end of one of the cables, said coaxial connectors cooperating, via a number ~3~3~
of openings in said positioning plate, with a number of ma-ting coaxial connec-tors which are provided on the signal processing boards in the respective func-tional unit, said mounting beam being adapted for detachable suspension from the supporting beams during -the positioning of said coaxial connectors on the mounting beam, and being adap-ted for sub sequent rigid connec-tion to the positioning pla-te prior to rigid cormection of the positioning pla-te to the suppor-ting beams.
Because the mounting beam prealigns the coaxial con-nectors with respect-~ the aper-tures in the positioning plate, suitable mounting oY the positioning plate is pos-sible, followed by easy mounting of the signal processing boards in the functional uni-ts.
In order to prevent accurate positioning of the hole pattern in the positioning plate with respect to the hole pattern in the mounting beam from increasing the cost during the punching process, a preferred embodiment of the bay is characterized in that the mounting beam as well as - 20 the positioning plate is provided with openings wherethro~
the coaxial connectors are inserted with clearance.
The invention will be described in detail hereinaf-ter with reference to the accompanying diagrammatic dra-wing.
Fig. 1 is a perspective view of a known bay, Fig. 2 is a perspective view of a preferred embodi-ment of a bay in accordance with the invention, Fig. 3 is a ver-tical sectional view across the po-sitioning plate and -the mounting beam of the bay shown in fig. 2, Fig. 4 i9 a horizontal sectional view, taken along the line IV-IV in fig~ 3, Fig. 5 is a view of one half of a positioning plate, Fig. 6 is an underview of the positioning plate shown in fig. 5, Fig. 7 is a plan view of the positioning plate shown in fig. 5, .
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Fig. 8 is a side elevation of the positioning plate shown in fig. 5, Fig. 9 is a longitudinal sectional view at an in-creased scale of a coaxial connection used in a bay as shown in Fig. 2, and Fig. 10 is a perspective view of two functional units used in a bay as shown in fig. 2, a cooling clevice being arranged on top of each functional unit.
The known bay shown in fig. 1 comprises -two metal supporting beams 1 and 3 which extend parallel to each other and which have an L-shaped transverse profile, said beams being secured to reltevant vertical columns 5 and 7 which form a lateral as well as a rear boundary of the bay.
Between the supporting beams 1 and 3 there are provided a number o~ horizontal cable guide beams 9 which comprise brackets 11 and pins l3 for guiding station cables 15 go-ing into and out of the bay and so-termed internal cables 17 which inter alia serve for the power supply of signal processing ~oards 19 (only one signal processing board is visible). The cables 15 and 17 extend mainly parallel to the supporting beams 1 and 3 and are uniformly distributed over the entire width of the bay when the bay is fully oc-; cupied. The cables 15 are provided near their ends with row connectors 21 of a customary type, whilst the cables 17 are provided near their ends with row connectors 23 whichare also of a customary type. The row connectors 21 and 23 of a section of the bay which is not yet occupied by a functional unit 25 are connected for the time being to a horizontal parking beam 27 screwed onto the supporting beams 1 and 3. Before a section of the bay is occupied by a functional unit 25, the relevant row connectors are de tached from the relevant parking beam. In the present case, a section which is situated underneath the parking beam 27 is occupied. To this end, inter alia relevan-t row connec-tors 29 are detached from a parking beam 31 and are subse-quently inserted through a window 33 in a metal position-ing plate 35. On the positioning plate 35 there are pro-, ~ .. ......
. . .
~ .
~L3223~
vided row connectors 37 whereto the row connectors 29 areconnected. The positioning p:late 35 is secllred to the sup-porting beams 1 and 3 only after all relevant, previously parked row connectors have been inserted through the rele-vant windows of the position:ing plate. Subsequen-tly, these connectors are connected to the relevant row connectors on the posi-tioning plate.
The functional unit 25 is mounted on the positioning plate 35 after the posi-tioning pla-te 3S has been moun-ted on the supporting beams 1 and 3. The functional unit can thenbe filled with a number of signal processing b~rds only the signal processing board 19 thereof being shown for the sake of simplicity. The functional unit 25 comprises gui-des 39 for the sliding and plugging of the signal proces sing boards 19. The signal processing boards 19 comprise a printed wiring board on which a number of electrical compo-- nents are mounted for the processing of electrical signals.
In the present case, concerning bays intended for telepho-ny, said components act on speech signals. On the positio-ning plate 35 a row connector 41 is provided for each sig-nal processing board 19. The signal processing boards 19 are provided with a known plug section (not shown) which is inserted into the row connectors 41. On the rear of the positioning plate 35 there is provided a master board 43 which is mounted on the positioning plate and which is pro-vided on both sides with printed wiring and also with pla-ted-through holes. All row connectors (37 and 41) moun-ted on the positioning plate 35 comprise connection pins which are inserted, through openings in the positioning plate 35, into the plated-through holes of the master board 43. The electrical connection of these connection pins to -the mas-ter board 43 is realized in one operation by wave-solde-ring before the mounting of the po.sitioning plate 35. The master boarcl 43 comprises recesses 45 for inserting the row connectors 29.
Due to the use of coa~ial cables which are suitable - for high frequencies and whose ends are provided with co-~::IL3Z23~3 axial connectors, these coaxial connectors must be inser-ted through openings in the positioning plate for electri-cal connection to mating coaxial connectors provided on - the signal processing boards 19. Contrary -to row connectors, these coaxial connectors and mating connectors rnust be very accurately aligned in order to prevent damaging of the con-tact pins and the contact sockets. During the moun-ting of the positioning plate 35 on the supporting beams 1 and 3, however, hardly any space remains behind the posi-tioning plate 35 for the maneuvering of the coaxial connectors.
In the bay in accordance with the invention which is des-cribed hereinafter, the problem described with reference to the known bay is solved. The parts of the bay in accor-dance with the invention which correspond to the known bay are denoted by corresponding reference numerals (fig. 1) and are not elaborated Por the sake of brevity.
The coaxial part of the station cables going into and out of the bay shown in fig. 2 is shown at the left.
Underneath the parking beam 31 there is provided a hori-zontal mounting beam 47 of sheet metal ~for example, steel3.In the case of a plurality of sections which correspond to a plurality of functional units 25 of a bay, there is a repetitious pattern of mounting beams extending between two parking beams. For example, a mounting beam 49 is si-tuated between the parking beams 27 and 31. The mountingbeam 47 is bent a-t right angles twice near its left as well as near its right end, so that ears 51 and 53 are formed.
In each of the ears 51 and 53 there is provided a recess 55, so that the mounting beam 47 can be loosely suspended from pins 57 screwed into the supporting beams 1 and 3.
The size of the recess 55 and the diameter of the pin 57 are matched so that the mounting beam 47 can be shifted to the lef`t as well as to the right and upwards and downwards with respect to the pins 57. Preferably, use is made of a pin in the form of a so-termed shouldered bolt (bolt com-prising a head and an a~utment shoulder) which is screwed into the supporting beams 1 and 3 only so far that the ,, .. , . . - I
f,,.
~3223~3 ears 51 and 53 can still be slid forwards and backwards be-tween the said head and the supporting beams 1 and 3. Ob-viously, the mounting beam L~7 can be suspended in a dis-placeable manner from the supporting beams 1 and 3 in a variety of ways. The descr:ibed method, u-tilizing the ears 51 and 53 which are formed by bending at righ-t angles twice, offers -the advantage that the ears 51 and 53 also provide adequate space for the cables behind -the mounting beam. After having been suspended, the mounting beam 47 can thus be tilted and slid in all directions. The mounting beam 47 is provided with a regular pattern of holes 59. The ends of the coaxial cables 15 are provided with coaxial con-nectors 61 which can be inserted through the holes 59 with a clearance. In the lower part of the positioning plate 35 there is provided a pattern of holes 63 which corresponds to the pattern of holes 59 in the mounting beam 47. When the positioning plate 35 is mounted, the coaxial connec-tors 61 also project with a clearance through the holes 63 in the positioning plate 35. Coaxial connectors 65 which mate with the coaxial connectors 61 are mounted on the sig-nal processing boards 19 (see fig. 3) by means of L-shaped strips 67 which are secured on the signal processing boa~s 19. A coaxial connector 61 and the mating coaxial connec-tor 65 each time for a coaxial connection 69, the details of which will be described with reference to fig. 9.
The figs. 2, 3 and 5 clearly show that the posi-tioning plate 35 is subdivided into three sectors. Procee-ding from the bottom upwards, there is provided a first sector which comprises the pattern of holes 63 for the co-axial connectors 61 which form coaxial connections 69(see fig. 9) in conjunction witn the mating coaxial connec-tors 65 (see fig. 3), said connections 69 being present in the coaxial station cables 15 going into and out of the bay. The coaxial connections 69 are usually installed at the site of a bay, so that the accessibility of these con-nections must be optimum for mounting. Above the pattern of holes 63 there is provided a further pattern of holes `:
1~3Z~3~
(not shown in fig. 5 f`or the sake of simplicity) for in-serting coaxial con~ectors 71 which are connected to ma-ting coaxial connectors 73 which are provided on the L-shaped strips 67 of the signal processing boards 19. The coaxial connectors 71 and the mating coaxial connectors 73 together form coaxial connections of` the sarne type as the coaxial connections 69 (see fig. 9) and are used for interconnecting the signal processing boards 19 of the same functional unit 25. This is realized by means of co-axial cables 75 (see fig. 3) which extend substantiallyhorizontally behind the positioning plate 35. In fig. 3, the coaxial cables 75 have been turned one quarter of a turn in order to make them visible. The third and upper section of the positioning plate 35 is occupi~l by the low-f`requency row connectors ~i1 in which the signal processingboards 19 are plugged by way of row connectors 77 if pre-sent. The row connectors 41 are connected, via the master board 43 (see fig. 3), `to the row connectors 37 wh~ ch are also situated in the third section. The row connectors 37 are connected, by way of row connectors 79 (see fig. 2) in-serted through the windows 33, to cables 81. The cables 81 serve for low-frequency connections going into and out of the bay. The cables 81, however, may also include cables for low-frequency connections between the signal proces-sing boards 19 of one and the same functional unit (forexample, the cables 17 in fig. 1).
The coaxial connectors 61 are mounted on the moun-ting beam 47 before the mounting beam 47 is suspended from the pins 57, so that optimum accessibility and maneu~era-bility of the connectors is obtained. This is also partlydue to the fact that the height (in the vertical direction in the mounted condition) of the mounting beam 47 is sub-stantially smaller than the height of the positioning plate 35 which is to be mounted at a la-ter stage. After all co-axial connectors 61 have been secured on the mounting beam~17, the beam is suspended from the pins 57. Because the po-sitioning plate 35 itself is aligned again with respect to ..... . . . . .
:, ' f' L3~38 the mounting beam 47, the coaxial connectors 61 have th-us been prealigned with respect to the pattern of holes 63 in the positioning pla-te 35. Because the functional unit 25 itself is aligned again with respect to -the positioning plate 35, the coaxial connectors have also been prealigned with respect to the mating coaxial connectors 65 which are situated on the signal processing boards 19 which are to be slid into the f'unctional unit 25 at a later stage. The a-lignment of the posi-tioning pla-te 35 with respect to the suspended mounting beam ~7 is realised by means of' ali.gn-ment tags 83 and 85 which are formed on the mounting beam 47 and which fit in relevant holes 87 and 89 provided in the positioning plate 35 (see figs. 2 and 5). A third a-lignment tag 91 of the mounting beam 47 fits in a hole 93 of the positioning plate 35. After alignment of the posi-tioning plate 35 with respect to the mounting beam 47, the mounting beam which is still movably suspended from the pins 57 is screned to the positioning plate 35. This is effected by means of at least two screws 95 and 97 which are screwed into threaded holes in the mounting beam 47.
Only one threaded hole 99 is visible in fig. 2. The align-ment of the f`unctional unit 25 with respect to the posi-tioning plate 35 is realised by means of an alignment tag 101 which is punched from -the positioning plate 35 and which fits in a slot 102 for~med in the bot-tom plate of' the functional unit 25. After the positioning plate 35 has been secured to the mounting beam 47, the positioning plate 35 is screwed to the supporting beams 1 and 3 by means of screws 103 which are secured in the positioning plate 35 at the left (not visible) as well as at the right and which are prevented from falling out of the positionirg plate 35 by means of' threaded bushes 105 which also deter-mine the distance between the positioning plate 35 and the supporting beams 1 and 3. Subsequently, the f'unctional unit 25 is screwed to the positioning pla-te 35, af'ter which the signal processing boards 19 are inserted into the functional unit 35. Simultaneously per signal proces-slng board 19, the row connectors 77 are connected to the ' : ----- ~ , . . .
~'1 .~` 113223~3 row connectors ~11, the mating coaxial connectors 73 are connected to the coaxial connectors 71, and the matin~ co-axial connectors 65 are connected to the coaxial connectors 61 (see fig. 3).
In order to prevent the extremely small manufactu-ring tolerances of notably the positioning plate 35 and the mounting beam l~7 from having a cost-increasing effect;, a given clearance is provided between the coaxial connec-tors 61 and the holes 59 and 63 in the mounting beam L~7 and the positioning plate 35, respectively. This clearance is denoted by the reference numeral 107 for the positioning plate 35 and by the reference numeral 109 for -the mounting peam 47 in fig. 9. In principle, the clearances 107 and 109 may be -the same. Obviously, said clearances are also attuned to the permissible plugging tolerance of the co-axial connectors. The coaxial connection 69, formed by the connection of the coaxial pin connector 61 to the coaxial socket connector 65 as well as by the bushes 110 and 112 is of a customary construction. However, of essential im-portance are the clearances 107 and 109 for the outer parts ; o~ the connection which project through the positioning plate 35 and the mounting beam ~7. It is also to be noted that, after the said connection has been established, it is not necessary to eliminate the lateral slidability in 25 the holes 63 and 65 by the tightening of a nut 111 and a spacing bush 113. It is sufficient to lightly lighten the nut 111 and the bush 113.
The increased data flow percable and the increased miniaturisation of -the electrical components on the signal processing boards 19 have given rise to a greater develop-ment of heat than previously in the functional units 25.
- Because the signal processing boards 19 are vertically ar-ranged in the functional units 25 (see fig. 1) and because the functional units 25 are provided with circulation aper-tures 115 (see fig. 10), use can be made of the naturaldraught of heated air. If necessary, this natural draught can be supplemented by forced cooling. r`orced cooling of .
'' ' I .
. ~
1~3;2~38 this kind, however, is not necessary in a considerable number of cases, if, like in a preferred embodiment of the described bay, use is made of a roof-shaped guiding device 117 which is mounted each -time between two functional units 25 and which serves as a cooling device. The comparatively cold air entering in accordance with -the arrows 119 can - rise between the signal processing boards 19 (not shown for the sake of simplicity) according to the broken lines 121, and can escape according to the arrow 125 through a window 1Z3 in the guiding devlce 117.
It will be clear that the bay in accordance with the invention is not restricted to a given type of cable such as said coaxial cables. Fibre-optic telecommunication cables presently being developed can also be advantageous-ly used in the described bay. The alignment of the like-; wise coaxial connector parts is of major impor-tance f,or such a type of cable.
', ' ' , , .
- s .. . . . .
Claims (7)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. An electrical signal transmission equipment bay, comprising two parallel supporting beams wherebetween ca-ble guide beams extend which are directed transversely of the supporting beams and which are situated in a first ver-tical plane, and also cables, going into and out of the bay which are guided along the cable guide beams and which extend mainly parallel to the supporting beams inside the bay, the ends of a number of said cables being provided with a row connector for electrical connection to one of a number of plug-in signal processing boards each accommoda-ted in one of a number of functional units accommodated in the bay, via successively a row connector which is situa-ted on a positioning plate for the respective functional unit, a master printed wiring board which is connected to the positioning plate, and a further row connector which is connected to the positioning plate and into which that signal processing board is plugged, characterized in that between the supporting beams there is provided at least one mounting beam which extends transversely to the sup-porting beams and on which are positioned a number of co-axial connectors each connected to the end of one of the cables, said coaxial connectors cooperating, via a number of openings in a respective said positioning plate, with a number of mating coaxial connectors which are provided on the signal processing boards in the respective func-tional unit, said mounting beam being adapted for detach-able suspension from the supporting beams during the positioning of said coaxial connectors on the mounting beam, and being adapted for subsequent rigid connection to the positioning plate prior to rigid connection of the positioning plate to the supporting beams.
2. A bay as claimed in Claim 1, characterized in that the mounting beam as well as the positioning plate is provided with openings wherethrough the coaxial connectors are inserted with clearance.
3. A bay as claimed in Claim 1 or Claim 2, charac-terized in that the mounting beam comprises ears whereby the mounting beam is suspended from pins which are secured to the supporting beams, the mounting beam being displace-able with respect to the pins in the suspended condition.
4. A bay as claimed in Claim 1, characterized in that it comprises a parking beam for said row connectors on the ends of cables which is situated in a second verti-cal plane, transversely of the supporting beams, all the cables extending in a chute-like space between said first and second vertical plane, the positioning plate being provided with windows for insertion of the row connectors which have been present on the parking beam.
5. A bay as claimed in Claim 1, 2 or 4, charac-terized in that for each signal processing board in a functional unit a row connector is provided on the posi-tioning plate.
6. A bay as claimed in Claim 1, characterized in that the positioning plate comprises a positioning tag which fits in a recess of the relevant functional unit, whilst the mounting beam comprises positioning means which cooperate with positioning means on the positioning plate.
7. A bay as claimed in Claim 1, characterized in that the signal processing boards are vertically arranged in the functional units, a roof-shaped guiding device for the inlet and outlet of cooling air being arranged between the functional units.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL7808721 | 1978-08-24 | ||
| NL7808721A NL7808721A (en) | 1978-08-24 | 1978-08-24 | RECORDING DEVICE FOR ELECTRICAL SIGNAL TRANSMISSION TECHNOLOGY UNITS. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1132238A true CA1132238A (en) | 1982-09-21 |
Family
ID=19831430
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA333,918A Expired CA1132238A (en) | 1978-08-24 | 1979-08-16 | Electrical signal transmission equipment bay |
Country Status (15)
| Country | Link |
|---|---|
| US (1) | US4288838A (en) |
| JP (1) | JPS5816637B2 (en) |
| AR (1) | AR216609A1 (en) |
| AU (1) | AU528917B2 (en) |
| BE (1) | BE878377A (en) |
| BR (1) | BR7904652A (en) |
| CA (1) | CA1132238A (en) |
| DE (1) | DE2932883A1 (en) |
| DK (1) | DK349279A (en) |
| FR (1) | FR2434548A1 (en) |
| GB (1) | GB2029115B (en) |
| IT (1) | IT1121463B (en) |
| MX (1) | MX147800A (en) |
| NL (1) | NL7808721A (en) |
| SE (1) | SE432043B (en) |
Families Citing this family (29)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4497411A (en) * | 1982-04-19 | 1985-02-05 | Northern Telecom Limited | Distributing frame for telecommunications systems |
| US4496057A (en) * | 1982-07-26 | 1985-01-29 | Fujitsu Limited | Rack structure for mounting a communication apparatus |
| US5019945A (en) * | 1983-05-31 | 1991-05-28 | Trw Inc. | Backplane interconnection system |
| US4542443A (en) * | 1983-08-08 | 1985-09-17 | Westinghouse Electric Corp. | Termination frame assembly with protection from EMI from field wiring and rack for same |
| US4575840A (en) * | 1984-03-30 | 1986-03-11 | Itt Corporation | Telephone line access device for main distribution frame |
| US4583215A (en) * | 1984-03-30 | 1986-04-15 | Itt Corporation | Telephone line access system for main distribution frame |
| DE3508477A1 (en) * | 1985-03-09 | 1986-09-11 | Philips Patentverwaltung Gmbh, 2000 Hamburg | Retaining device for telecommunications technology apparatuses |
| FR2580372B1 (en) * | 1985-04-15 | 1987-06-26 | Ropelato Michel | MODULAR ALVEOLAR BOX SYSTEM, PARTICULARLY FOR THE CONSTITUTION OF INDUSTRIAL EQUIPMENT |
| EP0219134B1 (en) * | 1985-10-18 | 1992-06-24 | Hitachi, Ltd. | Power supply construction |
| JPS62188755U (en) * | 1986-05-20 | 1987-12-01 | ||
| US5014164A (en) * | 1989-09-08 | 1991-05-07 | International Business Machines Corporation | Cable organizer |
| US5430615A (en) * | 1990-08-14 | 1995-07-04 | The Grass Valley Group, Inc. | Printed circuit board assembly |
| AU669326B2 (en) * | 1991-01-22 | 1996-06-06 | Jedray Pty. Ltd. | Safety device |
| US5642264A (en) * | 1991-04-01 | 1997-06-24 | E-Systems, Inc. | Apparatus for supporting circuit cards in slot locations |
| US5172306A (en) * | 1991-04-01 | 1992-12-15 | E-Systems, Inc. | Adaptive card mounting system |
| US5370553A (en) * | 1993-03-12 | 1994-12-06 | At&T Corp. | Adjustable terminations in equipment housing for cables |
| US5450272A (en) * | 1993-12-02 | 1995-09-12 | Northern Telecom Limited | Telecommunications equipment |
| FR2728757B1 (en) * | 1994-12-21 | 1997-01-31 | Gec Alsthom Transport Sa | SYSTEM AND METHOD FOR FIXING LINES |
| DE9420759U1 (en) * | 1994-12-27 | 1995-05-24 | Siemens Ag | Communication system |
| EP0720393A3 (en) * | 1994-12-27 | 1998-07-01 | Siemens Aktiengesellschaft | Communication system |
| US5721672A (en) * | 1996-05-10 | 1998-02-24 | General Signal Corporation | Core modules for a life safety system and structure for supporting such modules in a panel housing |
| US6067233A (en) * | 1998-02-27 | 2000-05-23 | 3Com Corporation | Mounting brace and cable management apparatus and method |
| US6242698B1 (en) * | 1998-12-08 | 2001-06-05 | Avaya Technology Corporation | Interchangeable adapter face plates |
| DE10126825A1 (en) * | 2001-06-01 | 2003-06-05 | Huber Signalbau Muenchen | Subrack and method for building the same |
| US6504730B1 (en) | 2001-07-23 | 2003-01-07 | Hamilton Sundstrand Corporation | Serviceable power modules for a power distribution assembly |
| US6856045B1 (en) | 2002-01-29 | 2005-02-15 | Hamilton Sundstrand Corporation | Power distribution assembly with redundant architecture |
| FR2880237B1 (en) * | 2004-12-28 | 2007-09-21 | Alstom Transport Sa | DEVICE FOR FIXING AT LEAST ONE ELECTRICAL HOUSING, ELECTRICAL ASSEMBLY AND CABINET COMPRISING SUCH A DEVICE, AND METHOD FOR MANUFACTURING A MACHINE INCLUDING SUCH A DEVICE |
| AU2009337066B2 (en) * | 2009-01-14 | 2013-01-24 | Boston Retail Products, Inc. | System and method for distribution of electrical power |
| US9059533B2 (en) * | 2013-02-02 | 2015-06-16 | Dte Electric Company | Lockout and tagging device and assembly for a switchable energy isolation device such as a terminal block |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3268772A (en) * | 1963-03-26 | 1966-08-23 | North American Aviation Inc | Packaged electronic equipment |
| DE2047134B2 (en) * | 1970-09-24 | 1972-11-30 | RECORDING DEVICE FOR DEVICE UNITS OF ELECTRICAL MESSAGE TRANSMISSION TECHNOLOGY | |
| US3801873A (en) * | 1972-10-04 | 1974-04-02 | Gte Lenkurt Inc | Main distribution frame-mounted central office subscriber carrier channel unit shelf |
| JPS5227202A (en) * | 1975-08-25 | 1977-03-01 | Fujitsu Ltd | Communication equipment rack |
| US3984622A (en) * | 1976-02-20 | 1976-10-05 | Southern Weaving Company | Multi-conductor cable harness with woven breakout cover and method of making same |
| DE2628489B2 (en) * | 1976-06-25 | 1978-07-20 | Siemens Ag, 1000 Berlin Und 8000 Muenchen | Receiving device for equipment units in electrical communications engineering |
-
1978
- 1978-08-24 NL NL7808721A patent/NL7808721A/en not_active Application Discontinuation
-
1979
- 1979-07-18 US US06/058,580 patent/US4288838A/en not_active Expired - Lifetime
- 1979-07-20 BR BR7904652A patent/BR7904652A/en unknown
- 1979-07-24 AR AR277430A patent/AR216609A1/en active
- 1979-08-14 DE DE19792932883 patent/DE2932883A1/en not_active Ceased
- 1979-08-16 CA CA333,918A patent/CA1132238A/en not_active Expired
- 1979-08-20 AU AU50097/79A patent/AU528917B2/en not_active Ceased
- 1979-08-21 SE SE7906952A patent/SE432043B/en not_active IP Right Cessation
- 1979-08-21 MX MX179001A patent/MX147800A/en unknown
- 1979-08-21 GB GB7929023A patent/GB2029115B/en not_active Expired
- 1979-08-21 DK DK349279A patent/DK349279A/en not_active Application Discontinuation
- 1979-08-21 IT IT68701/79A patent/IT1121463B/en active
- 1979-08-22 BE BE0/196840A patent/BE878377A/en not_active IP Right Cessation
- 1979-08-22 FR FR7921166A patent/FR2434548A1/en active Granted
- 1979-08-23 JP JP54106734A patent/JPS5816637B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB2029115A (en) | 1980-03-12 |
| AU5009779A (en) | 1980-02-28 |
| AU528917B2 (en) | 1983-05-19 |
| DE2932883A1 (en) | 1980-03-13 |
| JPS5816637B2 (en) | 1983-04-01 |
| DK349279A (en) | 1980-02-25 |
| FR2434548B1 (en) | 1982-07-02 |
| US4288838A (en) | 1981-09-08 |
| MX147800A (en) | 1983-01-12 |
| BE878377A (en) | 1980-02-22 |
| JPS5536992A (en) | 1980-03-14 |
| BR7904652A (en) | 1980-04-15 |
| SE7906952L (en) | 1980-02-25 |
| IT1121463B (en) | 1986-04-02 |
| GB2029115B (en) | 1982-11-10 |
| SE432043B (en) | 1984-03-12 |
| IT7968701A0 (en) | 1979-08-21 |
| AR216609A1 (en) | 1979-12-28 |
| FR2434548A1 (en) | 1980-03-21 |
| NL7808721A (en) | 1980-02-26 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry | ||
| MKEX | Expiry |
Effective date: 19990921 |