US1774421A - Receiving apparatus - Google Patents

Description

Patented Aug. 26, 1930 UT STTES PATENT oFFIcE GLENN W. CARPENTER, OF SCHENECTADY, NEVI' YORK, .FI-SSIG-NOR TO GENERAL ELC- TRIC COMPANY, A CORPORATION 0F NEW YORK i RECEIVING APPARATUS Application filed April 25,

My present invention relates to receiving apparatus for high frequency signals, and more particularlyk to vacuum tube receiving equipment. y

One of the objects ci' my invention is to provide a receiving apparatus which will be compact and one in which the length of the leads which connect the vacuum tubes to other apparatus will be reduced to a minimum. A.

-. further object of my invention is to provide an apparatus in which the electrical connections may be readily made and in which a portion at least oi' the auxiliary apparatus used in connection with the vacuum tubes and the connections to that apparatus will be securely protected i'rom mechanical injury and from corrosion or oxidation. Y

The novel features which l believe to b characteristic of myinvention are set forth with particularity in the appended claims. My invention itself however will best be understood by reference to the following `description taken in connection with the accompanying drawing in which Fig. 1 is a longitudinal vertical cross section or an apparatus embodying my invention; Fig. 2 is a plan view ot the same with a portion of the cover broken away; and llig. 3 is a transverse crosssection along the line 3-3 of Fig. 1.

l have shown in the drawing a receiving apparatus employing sii; vacuum tubes ot' thev three-electrode type. The sockets for the vacuum tubes and a plurality oit' electrical devices employed in the circuit connections :tor the tubes are enclosed in a receptacle 11, which is preferably of conducting material but which may be made ot insulating material ii' desired. A block of slab 5 of insulating material fits into the top oi' the receptacle 4;, this block 5 being secured by means of screws 6 to a cover 7, which entirely closes the top of the receptacle and is secured thereto by screws 8.

The bloclr 5 of insulating material is provided with openings 9 Jfor receiving the bases ot vacuum tubes and the cover 7 is provided with openings 10, which register with the openings 9 in the bloclr 5. provided in the block 5 on one side of each 4of the openings 9 and the cover l is provided on Grooves 11 are 1924. Serial No. 709,066.

one side ot each opening 10 with a notch 12,

which registers with a corresponding groove 11. The necessary contact springs 13 for making contact with the terminals ot the vacuum tube base are secured to the under side of the block 5 by means of rivets 14. wtVV hen the vacuum tube base is inserted in one ot the openings in the cover and block 5 the usual pin on'the side of the base is in sorted through the notch 12. rlhe tube may then be rotated and the pin will engage the under side of the cover 7 and hold the terminals on the tube base in good contact with the springs 12. To prevent any accidental release or" the tube from good contact the metal ot the cover adjacent the notches 12 is pressed downwardly, as indicated at 15, so that a tube cannot readily be rotated and removed without first exerting a downward b v of the cover.

Suspended from the block 5 are a plurality oi electrical devices which may-be connected r1n the circuits ot1 the vacuum tubes.

The particular circuit connections employed in the apparatus illustrated form no part of my present invention and therefore the specific circuit connections are not illustrated or described. My invention is obviously applicable to any circuit connection desired. Among the diiierent pieces ott apparatus indicated in the drawing are `tour transformers 1G, 1'?, 18 and 19, adapted for use in transe forming high frequency currents. A single set of punchings held together by rivets 2O is employed for completing the magnetic circuits of all of these transformers. Two other transformers 21 and 22 adapted tor audio trequency transformation are also shown. The transformers are all suspended from the block 5 by means of screws 23 extending through the block 5 and into the upper edges of the transformer cores. hese screws are surrounded by spacing tubes 24 for preserving a desired spacing between the transformers and the under side oi block 5.

Two parallel strips 25 ot insulating material are secured to the core of the high frequency transitormers by means of rivets 26.

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A plurality of notches are provided in these strips 25 tor engaging and holding condensers 27, which are included in tho vacuum tube circuit connections. Each oj the con tact springs 13 is provided with a suitable terminal for making desired soldered connections between the vacuum tubes and the apparatus within the receptacle as well as tor making connections from the vacuum tubes and apparatus within the receptacle to the operating batteries and other portions o'r the receiving` system which cannot conveniently be enclosed in the receptacle. Some ot these terminals, as tor example, the terminals marked 28, extend upwardly from the bloclr 5. @ther terminals marked 29 extend downwardly into the receptacle a considerable distance. The block 5 also carries some additional terminals 80, which extend downwardly into the receptacle. ln addition to the apparatus already described li have indicated at 3l a grid leal: which is connected to two ot the downwardly extended terminals.

All of the connections between the vacuum tubes and the apparat cle et and the other portions of the receiving system may be made by conductors B2. Some et' these conductors are connected to terminals on top of the block 5 and others are connected to terminals on the under side oit block 5 and extended to the top ot the block through suitably located holes therein. All of the conductors 82 extend downwardly through an over-hanging portion 88 ot the block 5, this overhanging` portion being covered by the cover 7 so that when the apparatus is assembled none of the wiring within the receptacle is exposed to mechanical injury or the collection of dust. Neither is there any danger ot breaking any of the connections by pulling on the conductors 32. The arrangement ot apparatus shown is also so compact that the length et leads required between the diiierent devices is reduced to a minimum.

After all of the electrical connections tor the apparatus to bc enclosed in the receptacle 4l have been made and tested, the receptacle 4: is partly iilled with a hot molten insulating material which becomes solid when cold, such for example, as resin. rlhe assembled unit is then inserted in the receptacle and the insulatingl material allowed to harden. In the apparatus illustrated this insulating material 34C fills all of the space within the receptacle to a level which is above the tops ot the transformers. Under some circumstances thc condensers 27' may also be surrounded by the solidilied insulating material. All oi the connections trom the coils of the transformers are made to the downwardly extending; terminals so that when the unit is comi etcd all ot these connections are surrounded by the solidiiied insulating material and thus completely protected from mechanical injury as well as from exposure to the air and consequent oxidation or corrosion. The terminals of some ot the condensers 27 also extend downwardly in order that the connections thereto may be similarly protected. As a result the only soldered connections w iich are expos-ed to the aii` are comparatively massive and rigid connections such as those which may be made between the conductors 32 and the termina-ls carried on the upper side of block 5.

lWhile l have shown and described only one embodiment of my invention, it is apparent that many modilications may be made in the construction and arrangement of the apparatus witnout departing trom the scope ot my invention as sct forth in the appended claims. lt is also apparent that my invention is in 'no way dependent upon the use of anyvparticular circuit connection but that it may be used with a great mult'plicity of circuit connections.

What l claim as new and desire to secure by Letters ljatent ol the United States is l. The combination in a high frequency receiving apparatus ot a receptacle, a block oit insulating material which tits into the top ot said receptacle, said block being provided with a plurality or openings tor receiving the bases oli vacuum tubes, and a plurality ot electrical devices suspcn ded trom thn under side ot said insulating;` block, the space within receptacle surroundine` said devices being lilled with a solid insulatini;` material.

2. The combination in a high 'frequency signal receiving` apparatus of receptacle, a block o'l' insulating; material which lits into the top ot said receptacle, said block being provided with a. plurality of openings tor receivingl the bases oi" vacuum tubos.y contact springs secured to the under side ot said block 'for making contact with vacuum tube terminals, and a plurality of electrical devices suspended from the under side oil' said insulating' block, the space within said receptacle surroundine, said devices being;- filled with. a solid insulating material. Y

3. The combination in a high frequency signal receiving apparatus ol" a receptacle, a block of insulating mat lrial which lits into the top ot said receptacle, said bloclr being` provided with a plurality of openings 'for receiving the bases ot vacuum tubes, a plurality of electrical devices suspended from the under side et said insulating' block, and a cover tor said receptacle having openings therein which register with the openings in said block ot insulating' material. l

4. The combination in a high frequency signal receiving' apparatus of a receptacle, a block ot insulating material which lits into the top of said receptacle, said block being provided with a plurality of openings 'for receiving the bases of vacuum tubes, contact f springs secured to the under side of said block for making Contact with vacuum tube terminals, ayplurality of electrical devices suspended from the under side of said insulating bloclr, a cover for lsaid receptacle' having openings therein which register with the openings in said block of insulating material, and a notch in said cover on one side of each of the openings therein for receiving a pin in the base of a vacuum tube which pin will engage with the under side of said cover when the tube is rotated and hold the terminals of the tube base in good Contact with said contact springs.

6. The combination in a high frequency signal receiving apparatus of a receptacle, a block of insulating material which fits into the top of said receptacle, two parallel stri s of insulating material suspended from t e under side of said block and a plurality of electrical devices secured to said strips.

7. The combination in a high frequency signal receiving apparatus of a receptacle, a block of insulating material which fits into the top of said receptacle, two parallel strips of insulating material suspended from the under side of said block, and a plurality of electrical devices which are engaged in suitable notches cut in said strips.

8. The combination in a high frequency signal receiving apparatus of a receptacle, a bloclr of insulating material which fits into the top of said receptacle, a pair of parallel strips of :insulating material suspended from the under side cf said block, and a plurality of condensers adapted for use in a high frequency signal receiving system and which are engaged in notches in said strips of insulating material.

9. The combination in a high frequency signal receiving apparatus of a receptacle, a cover for said receptacle, a block of insulating material which fits into the top of said receptacle and is secured to said cover, and a plurality of transformers adapted for use in a high frequency signal receiving system suspended from the under side of said insulating block, the space within said receptacle surrounding said devices being filled with a solid insulating material.

10. The combination in a high frequency signal receiving apparatus of a receptacle, a block of insulating material which fits into the top of said receptacle, a pair of strips of insulating material suspended from the un der side of said insulating block, said block being provided with a plurality of openings for receiving tloe bases of vacuum tubes, contact springs secured to the under side of said block for making contact with vacuum tube terminals, a plurality of electrical devices secured to said strips of insulating material, and a plurality of terminals carried by said block whereby electrical circuit connections may readily be made between the vacuum tube contact springs, the deviceswithin the receptacle and other devices outside of the receptacle.

11. The combination in a high frequency signal receiving apparatus of a receptacle, a bloclr of insulating material which fits into the top of said receptacle, a pair of strips of insulating mate 1ial suspended from the under side of said insulating block, a plurality of electrical devices which are engaged in suitable notches cut in said strips, said block being provided with a plurality of openings for receiving the bases of vacuum tubes, contact springs secured to the under side of said block for making Contact with vacuum tube terminals, a plurality of transformers adapted for use in a high frequency signal receiving system suspended from the under side of said block, and a plurality of terminals carried by said block whereby electrical circuit connections may readily be made between the vacuum tube contact springs, the devices within the receptacle and other devices outside of the receptacle.

12. The combination in a high frequency signal receiving apparatus of a receptacle, a block of insulating material which fits into the top of said receptacle, a pair of strips of insulating material suspended from the under sideiof said insulating block, a plurality of electrical devices which are engaged in suitable notches cut in said strips, said block being provided with a plurality of openings for receiving the bases of vacuum tubes, contact springs secured to the under side of said block for making contact with vacuum tube terminals, a plurality of transformers adapted for use in a high frequency signal receiving system suspended from the under side of said block of insulating material, and a plurality of terminals Carried by said block whereby electrical circuit connections may readily be made between the vacuum tube Contact springs, the devices within the receptacle and other devices outside of the recep-y tacle, the space within said receptacle surrounding said transforiners being filled with a solid insulating material.

13. The combination in a high frequency signal receiving apparatus of a receptacle, a

cover for said receptacle, a plurality of radio lic transformers suspended from said cover, the space within said receptacle surrounding said devices being` filled with a solid insulating material and a plurality of soclets for vacuum tubes carried by said cover.

14. The combination iii a high frequency signal receivino` apparatus of a receptacle, a block of insulating material which fits into the top of said receptacle, Contact springs secured to the under side of said bloclr and adapted to malte contactivith vacuum tube terminals, and a plurality of radio transformers supported from the under side 0f said block, the spacA Within said receptacle surrounding said transformers being filled with a solid insulating material.

15. rlhe combination in a high frequency signal receiving apparatus of a receptacle, a block of insulating material which fits into the top of said receptacle, Contact springs secured to the under side of said block and adapted to malte contact with vacuum tube terminals, a plurality of radio transformers supported from the under side of said block, and terminals carried on the under side of said block to Which the coils of said transformers are connected, said transformers and connections of the coils thereof to said terminals beingsurrounded by solid insulating' material.

16. The combination in a high frequency signal receiving apparatus of a receptacle, a bloclr of insulatingl material which fits into the top of said receptacle, .and a plurality of transformers adapted for use in a high frequency signal receiving system secured to and suspended from the under side of said block of insulating' material, terminals carried by said block to which the coils of said transformers are connected, said transformers and the connections of the coils thereof 'to said terminals being surrounded by a solid insulating material.

17. The combination in a high frequency signal receiving apparatus of a receptacle, a cover for said receptacle, a plurality of transformers adapted for use in a high frequency signal receiving system located Within said receptacle, terminals carried by said cover te which the coils of said transformers are connected, said transformers and the point of connection of the coils thereof to said terminals being surrounded by a solid insulating material.

18. The combination in a high frequency signal receiving apparatus of a receptacle, a block of insulating material which ts into the top of said receptacle, a plurality of electrical devices suspended from the under side of said insulating block, said blocl being provided with a plurality of openings for ie- -ceiving the bases of vacuum tubes, contact springs secured to the under side of said block for making` Contact With vacuum tube terminals, and a plurality of terminals car-

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