US1253296A - Pull-socket for electric lamps. - Google Patents

Description

S. STRAUS.

PULL SUCKET FOR ELECTRIC LAMPS.

APPLICATION FILED )UNE 3.1916.

Patented Jan. 15,1918.-

WI TNESSES By I BAAVInM l THNEYS @man relatesfwgrpulmqckts f melft- GRDQQS'cent lampo :und hais for its 'rliliiiersiozi..

hgh `151,110 puns 'afilie lino 2;-2

trai montag-:ts terminal of the lump wlen the ,latter -is imposition); this `boli; also holds, A4lampeyiug;z. 'stoontact 4, an. angled piece recessed in the periphery of tho busq membel' l, t0 which 'piece ifs connected, m 'tho usual wa one of the main flexible oonduc More@ channel l',4 recessed in b oth base ahdoover, is provided for this flexible com ductor. 1 l A .Socket shell' 8, ,threaded as usual to re- 6'0 oeve thecorrspondingthreadedplug ,tor-4 niinul on the lum is atmohedto the bottom of thebody mem er1 bymeansof a bolt: y This socket shelihas1 a top 10 in whlch 1s partly dotmcbv Ei .11). slot `is` so mim-itinserted uti t e bottom of theso4 -below sadflegs. and tend to -foxfged' un inwardly extended .slot (shown1 l mwa-rd nuof dogmas provided proyecton or bos's 'r11 'formed on tHe b'iom i termi) gmclh'forth'e pull chain 14, attjhed to- Suid 'doggby means of which said dbg s ac f mounted ny Vcruciform (4 -urmslwtch lunch'ol the-rnwiuing nir ofo p ositueglmA nrmh' 20.

An indentation yformed on the lower und this ndeiitntion is 'e in the upper art of ieg 13. Sprin s 27 are ets and A push the slip member upwardly. Aprojectlou 27\0n the tio'n on o so fait he forward e ga 28 of member 25 is vertical und its upper surface incliues down- I gedfoy aoori j responding'A proj'ootiiw ormed upon tho 4 110s-` 'outorl 26-en l ges a corresponding Rrojep- 11 ctof -thsleg' so as to prevent tho sli mqmber bem pusheld, upwardly too with a thin walled U-shaped sleeve-2; cpposite walls of which are provided wit circular openings and slots from the top thereof. Chain 14 is connected to the dog 13 by forcing the ball at one of its ends down into the sleeve and into vthe circular' o eninfrs.

The contact arm 21 is provided with a downward projection 30 which is adapted to drop into a corresponding hollow in the U-shaped spring members 20 asthcse members are respectively engaged with said contact arm 21.

A spring 3l upon spindle 18 is held in position by the cover member 2 and keeps the crucii'orin contact member- 19 pressed downwardly against the plate 17.

Cover member 2, although held to the base member 1 by but 'a single bolt 3, is kept centered and prevented from turning by a downwardly projecting lng 32, whichrdrops into the end of slide way 12.

A spring 33 surrounds chain 14 and -is interposed between dog 13 and a ange 31 at the end of slide way 12; this spring tends to keep dog 13 at the end of slide way 12 opposite the chain.

An insulating sleeve 35 and outer metal shell 36 of usual type inclosc the socket when assembled.

An incandescent lamp being in position, the operation of my invention is as follows:

vThe part-s being as shown in' the igures'the circuit is closed and the `lamp lighted. The

circuitis through conductor to angled piece 5 and Contact l; thence through the amp to4 socketl shell 8,. through bolt 9 to platel' and spindle 18 and to switch member 19. The circuit `then passes through one of the spring members 20 to and through Contact arm 21'and thence to conductor 23. ,'To break the circuit the chain 14 is pulled thus drawing the dog 13 along the slide Way .12 and bringingY the edge 2S of slip member V 25 against the edge of that arm of contact member 19 which` at the moment,

lies across the-slide way 12.y This will cause the 'switch member 19..to be rotated through 90O and bring one :ofthe tiatarms of. the

switch under but out of contact with the.

arm 21. The circuit will thus be broken. On releasing the chain, the do 13, which will have been drawn 4to the rig t (Fig. 3) so as to have a switch arm extending across the slide way behind it, will be pushed back by the spring 33; when the pawl 25 comes in contact with the switch 'arm the pawl will be depressed against the resistance of the springs 27, so that the dog may pass the arm and rest in its original position (at the left, Fig. 3).

lt will be noted'that the socket of m invention is very simple and'little liab e to get. out of order. It should also be noted that the pull and movement of the chain 4and switch dog is straight across the center ofthe socket so that the chain is not liable to bend or kink. It should be noted, further, that each point of the circuit is separated by substantial amounts of insulationV from all other parts of the circuit which differ substantially from it in E. M. F.

lVhile I have described my invention in one of its possible embodiments it is obvious that other forms of the invention may easily be designed by those skilled in the art within the spirit of the following claim In a pull socket, an insulating body having a chamber and a transverse slidewayv opening from the bottom of said chamber, an insulating cover for said chamber, a spindie set in the bottom of said'chamberto one side of the slideway, al cruciform switch 'in said chamber loosely A mounted upon said spindle and adapted to have one arm cross the opening'of said slideway, a spring upon said spindle above the switch and havinfg its 'upper end against the lower surface o the cover, a switch dog slidable in the slideway and provided with a chain,v a depressible' pawl upon the top of saidswitch dogv anda circuit terminal adapted to -make contact with alternate switch arms,the switch being connected with the other circuit terminal.

In testimony whereof have hereuntoset m hand. y SAMUEL STRAUS.

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