US2562979A - Slidable lamp support - Google Patents

Description

Aug. 7, 1951 c. R. YINGLING SLIDABLE LAMP SUPPORT Filed July 25, 194"? INVENTOR. CL lNTO/V A. Y/A/Gl. I/VG,

IIIIIIIIIIIIUIIIIIIIIA \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\1\\\\\\\\\\ Patented Aug. 7, 1951 -um'reo STATES PATENT OFFICE I 2,562,979 sLIDABLE LAMP SUPPORT Clinton R. Yingling, Denver, Colo. Application duly 25,1947, Serial No. 763,469

5 Claims.

- gated circuit contact members are carried by the support and slidable brushes or contact members are carried by the lamp so as to permit the lamp to be moved along the length of the support with the sliding contact members continuously eng-aged with the fixed contact members, eliminating wires extending from the lamp directly, which frequently obstruct a desk and continuously hinder the free movementof the lamp.

Another object of this invention is to provide a lamp of this kind having an extensible support and extensible circuit-connecting means carried by the support so that the support may be adjusted to any length desired for any particular desk or fixed support.

-A further object of this invention is to provide a lamp support of this kind which may be used over bins in hardware stores or the like having bins where a slidably-mounted light would prove desirable. I

With the foregoing objects in view, and others which may hereinafter more fully appear, the invention consists of the novel construction, combination and arrangement of parts as will be more specifically described, and illustrated in the accompanying drawings, wherein are shown embodiments of this invention, but it is understood that changes, variations and modifications may be resorted to which fall within the scope of the invention as claimed.

In the drawings:

Figure 1 :is'a' front elevation, partly broken .away, of an electric lamp support constructed according to an embodiment of my invention.

Figure 2 is a transverse section.

Figure 3 is a r'earelevation, partly broken away and partly in section, of the horizontal extensible support;

Figure '4 is a fragmentary section, partly broken away, showing the sliding contact members;

Figure 5 is a fragmentary horizontal section taken on the line 55 of Figure 4; and

Figure 6 is a fragmentary rear elevation, partly broken away.

Referring to the drawings, the numeral designates generally an electric lamp support comprising a fixed rail H, a carriage I2 slidable on the rail, and a lamp 14 supported on the carriage The rail II is formed of a pair of telescoping rods. l and 16' which are adapted to be fixedly mounted on a desk or fixed supporting structure. The rod 15 is slidably engaged in the rod 16 through one end thereof and the rods are bent at their free or outer ends rearwardly, as at I1, and

I8. Attaching plates I9 are fixed on the terminal end-s of the portions l1 and 18 for securing the ends of the rail to the desk so the length ofthe rail will be spaced from the desk. The rail II is formed of metal or plastic or other suitable material.

The rods or tubes [5 and I6 are formed with an elongated slot 20 along the length thereof on the inner side or side toward the supporting memhers"!!! and the desk. A plug 2| is carried by one end of one of the bars, as at H, and is formed with a pair of contacts 22 and 24 with which the contacts of a correlated plug 25 are adapted to vided to form continuous extensible contact members in the rail H and are adapted to be expanded when'the bars 15 and I6 are extended and contracted when the rail is shortened. The end-s of the springs 21 are fixed to hooks or eyes 29 I carried by the opposite ends of the rail forming members l5 and 16. The eyes 29 at one end are connected to the terminals 22 and 24 of the plug 2|, and the eyes 29 at the other end are fixed to an insulating plate 30 carried by the bar or tube [5 to insulate the springs from each other and length thereof.

from the rail I I. The springs are disposed adjacent the opening 20 in the members [5 and 16 so that they may be contacted by a sliding con-v tact from without the rail I I.

The lamp-supporting carriage I2 is slidably mounted on the rail II for movement along the The carriage I2 is formed of a flat plate 3| disposed on the inner side of the rail II and extending above and below the rail. A pair of rollers 32 are rotatably supported from the upper end of the plate 3| for engagement with the rail ll. Each of the rollers 32 is rotatably mounted between the ears 34 of an inverted U-shaped bracket 35 fixed to the upper end of the plate 3|. The rollers 32 are provided for engaging the upper side of the rail l l.

fixed on the upper end thereof.

the tube rise and platet'l. tendin iron; the lamp 39 in the shaft d8 engage fhe lower end of the plate 3! is bent outwardly and upwardly to form a U-shaped housing 36 closed at both ends. A spring-pressed roller truck 3'! is mounted in the housing 36. The truck 31 is formed of an elongated body 38 which extends substantially the length of the housing 36 therein and is free for vertical movement. Arms 39 extend through openings 48 in the ends of the housing for limiting the upward ,mo-vement of the truck 3?. A fiat leaf Spring 41 is engaged between the truck 31 and the lower wall or bottom 42 of the housing 36 for constantly urging the truck upwardly. Rollers M are ro tatably carried by the truck 3'! between upward ly-extending arms/or ears 5. The rollers G4 are biased toward engagement with the lower edge of the rail H for supporting the carriage l2 thereon for sliding engagement.

A tube at extending vertically is fixed on the rear or inner side of they plate 31. The tube lfi and plate 3| are formed with a small opening '47 therethrough adjacent the-slot '20 of the rail ill. A vertically-extending shaft 48 isirictionally engaged through the tube $6 forsliding vertical adjustment therein, and anelectric lamp 4.9 is The hollow shaft '43 is formed with an elongated slot 50 therein communicating with the aperture 41 .of

Electric Wires 52 .eX-

through theslot 5B ,and opening 4! so the shaft may beadiusted verticall while maintaining a circuit connection to the lamp '49.

A contact plug '54 is carried by the outer side .of the plate 3i immediately adjacent the rail H and slot is therein. r'liheplug '54 is made of suitable insulating material and a pair of contact members 55 and 55 {are contained therein. The wires .52 are adapted to be connected to the contacts 55 and 55 in the plug 54 and a pair of brushes .5? or sliding contacts extend from the plug 54 through the opening 21] of therail II for sliding engagement therewith. V

.In the use and op ration of this lamp support, the rail H may be extended or contracted to-suit the length of the desk or particular mounting. The extensible springs 21.,and28 are extended and contracted in accordance with the rail. While the carriage I2 is rollably or slidably mounted on the rail l l, the brushes .5! or sliding contact members maintain a circuit connection to the lamp as from the circuit leads '2'! and 28 in. all positions of theicarriage n the rail. 'While the lamp t l may be moved along the length of the rail H for horizontal adjustment, it may also be adjusted vertically by the shaft 48 slidably engaged in the sleeve or tube 46.

Having thus described my invention, what I claim is:

,1, An electric lamp support comprising a pair of telescoping horizontal tubular rods; said rods formed with elongated slotsin one side thereof,

a pair of resilient conducting members in said rodsadj acent said slo ts,.a connecting plug at one end of one of said rods, said conducting member engaging the terminals oI said plug, a lampsupporting carriage, rollers on said carriage engaging'said rods for sliding movement thereon,

a vertical lamp-supporting tube slidably carried by said carriage, an electric lamp on said latter tube, and circuit-connecting means in said latter tube and said carriage engaging said resilient conducting members for conducting current to said lamp.

2. An electric lamp support comprising a pair of telescopically related horizontal supporting rods, means securing said rods on a fixed support in spaced relation thereto, extensible circuit-connecting means carried by said horizon .tal rods, a lamp-supporting carriage slidably mounted on said horizontal rods, a vertical lamp-supporting shaft slidably mounted on said carriage, anelectric lamp on said shaft, and circuit-connecting means in said carriage and said shaft slidably engaging said extensible circuitconnecting means for connecting said lamp to a source of current supply.

3. An electric lamp support comprising an elongated horizontally extensible rail member, a pair of horizontally extensiblecircuit-connecting means carried by said rail member, said means terminating in a plug onsaid rail for connection to a source of current supply, -'a lamp-supporting carriage, rollers on said carriage engageable with said rail, a vertical lamp-supporting shaft slidably mounted on said carriage, an electric lamp on said shaft, circuit-connecting means carried by said carriage and said shaft slidably engaging said extensible circuit-connecting means-for connectingsaid lamp with said source .supporting carriage, spring-pressed rollers on said carriage engageable with said rail, a vertical lamp-supportin shaft on said carriage, an electric lamp on said shaft, and circuit-connecting means carried by said carriage and said shaft slidably engaging said extensible circuit-connecting means forrconnecting said lamp with said source of electric supply.

.5. An electric lamp support comprising a pair of telescopically-engaged supporting members, supporting means for "said members, exten- .Sible circuit-connecting means carried by said members, a carriage slidably engaged on said members for movement along the length thereof, an electric lamp on said carriage, and circuit-connecting means connected to said lamp and slidably engaging said extensible circuit;

connecting means. I

CLINTON 'R. YINGLING.

REFERENCES CITED UNITED STATES PATENTS Number Name Date 751,321 Miller Feb. 2, 1904 1,573,799 Bosworth' Feb. 23., 1926

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