US2573529A

US2573529A - Front mounted lamp holder

Info

Publication number: US2573529A
Application number: US33877A
Authority: US
Inventors: William R Young
Original assignee: General Electric Co
Current assignee: General Electric Co
Priority date: 1948-06-18
Filing date: 1948-06-18
Publication date: 1951-10-30
Anticipated expiration: 1968-10-30

Description

Oct. 30, 1951 W. R. YOUNG FRONT MOUNTED LAMP HOLDER Filed June 18, 1948 inventor". William RYoung.

Hi5 A-t'torneg.

Patented Oct. 30, 1951 *raonr MGT'INTED mm iirmzeee winiam n. -You'ng, Fairfield conh-g assigndr 'to General Electric company, a esmen-anon of New York "speimfion'truneis, 1aisjseriamozeasn "m'ation and bending,'andalso are vulnerable to the entrance of foreignmateri'al between the resilient springs and the lampholderhousing thus preventin returnof thespring to its normal psition for removal of the lampholder. v

Still others'require the making of an aperture in-thesurface sufficiently large toacc'ommodate the b'ody of the lampholder. Finally,'-where-the body of the lampholder protrudes behindthe-surfacasuch lampholder bodies must be treated as obstaoles and wires on the back of the surface must be diverted around them 'in going from one point to another with aresultant'increas'e in"wiring-cost. This increase in wiring cost becomes important where'large numibers-oflampholders are secured to a'surface and is objectionable in other cases wherespace 'for "wiring is at a premium.

It is one of the objects ofthis invention to pro- -videalampholder-which can be easily mounted on an apertured surface made of thin material without a cooperating part on the other side of thesurface and without the necessity of having an additional helper working behind the surface to tighten th usual mounting means.

"A further object is to'provide a rigid front finoiinting for a lainpholder b'y iis'e'of non resilient,

Fig. 1 except that the lamp'holderis mounted-and secured to thesurface; Fig.3 is-arear-elevation showing the lampholder 'secured'in' the surface as 'seen' through the aperture "in the 1 surface; -Fig:"4 'isa front elevation-of the -lampholder; Fig.5'isa partial section of the lampholder taken "'on line 5 5 ofFig. 4;Fig56 isarear-elevationwith"certain'partsbroken away; Fig. 7 isa' limitedpartial 'sectiofi'take'nbn line of'Fig. 4; 'and 'Figx -8 is apartial disassembled perspective *view.

In general, "my invention comprises a lampholder which' is anchoredtoasupport by means of a mechanism having radially movableelements "receptacle. Theshell I is-securedto the'housing 2 by two screws I0 and 'II. 'As shown in Figs. 6 and8, screw I0 is secured by "a nut I2 positioned in a recess I For housing 2; and serves to hold the shell 'I in place-in the housing. Screw I I is secured'by a' terminal plate I'I positioned; in a recess II. Terminalscrew-IB is threaded into terminal plate I! and acts as 'a' connector forone side ofthe line. Thus screw"! I "serves tosecure the shell I in position'in thehousin'g and-also "provides electrical connection between said'shfell and the terminal plate I I.

As shown in Figs. land '5, centerte'rminal 8-is shaped 'to'c'onform with and rest upon projection I3 of housing 2. 'Said projection is perforated by a cylindrical passage I9 to ac'commodate'a screw member 30 which will b more fullydescribed later. The center terminal 8' has an opening -2I formed therein to'admit-a' screw driver formovement of the screwm'ember 30. It'will be noted that a'portion l5 of thebase I 4 andsi'dewallfof theshell'ter'minal 'I'have been removed to accommodate the housing projection I3 and the center terminal '8. As shown in Fig.5, ascre'w 9 secures center terminalB and threads-into terminal 'plate "I6'which rests in recess I6 of housing 2. "Terminal plate I6 also has 'ascrew'22 which-acts as a line connector.

Means for securing the lamphol'der' to theape'rturedsurface is' best shown "in Fig. 8. The securingmechanis'mi ispositioned ina'recess 3' of housing 2 and comprises a frame '26','"a screw memberio, "and three "bell crank lever members -means. bers for attachment to the mounting 1 surface.

32 each with angularly disposed

arms

36 and 31. Said frame 26 may be made from a stamping having a base 38 perpendicular to the axis of said housing with a tapped center hole 21 therein, three sidewalls 33 radially disposed to the axis of said housing, and three ears 28 with perforations therein. The frame 26 is secured to the housing Zby ,three

screws

23,24 and '25'passing through the three ear 28. The screw member 3| consists of a shaft with threaded portion 34,

screw head 20, two spaced shoulders 3| which may be parallel disks, and a smooth portion 35 v of the shaft which may be of reducedcross sec-' LettersPatent of the United States is:

1. A lampholder adapted to mount against the face of an apertured surface comprising a lamp receptacle, a housing having a recess in the front thereof to accommodate said lamp receptacle and recesses in the rear to accommodate two tion between the two spaced shoulders-Saidscrew member 30 thread into the tapped center.

hole 21. The three lever members 32 are secured and pivoted to the three sidewalls 33 of the frame 26 by three rivets 39 or other suitable means.

The arm 36 of each lever member 32 of such it-is threaded into the tapped hole 2'! .of the frame 26 whereby the .screwmember moves toward the back of thelamph'older carrying the arms 35 of the lever. members 32 with it and thus rotating saidv lever members about their pivots 39 causing the arms 31 to be radially displaced. away fromthe axis of the housing as shown in Fig. 5. .Conversely, when 'the'screw member .is. turned in'the opposite direction, it moves towardthe front of the lampholder carrying. the arms 36 of the lever members with it and ,causing the arms3l to be radially dis- .placedtoward the axis of the housing asshown in Fig. 7.

ig. 1 shows the lampholder l' positioned be- .fore.a surface 4 with an aperture" 5 in said surface, I-Iere the arms 31 are disposed toward ,the axis of the housing 2 and in this contracted position} are ready fordnsertib'n in the aperture 5 of the surface ,4.

Fig. 2 shows the lampholder positioned against.

the surface 4 withthe arms 31 inserted in the aperture& and radially displaced'away' from the axis of the housinglso as positively and rigidly to engage the edge of the aperture 5 and hold thelampholder in mounted positionlf The line wires 4H and ll originate behind the surface and pass through theaperture 5 to be secured to or removed from the line terminals [8 and 22 from the front of the surface when the lampholder is removed from the surface.

It will be observed that my lampholder can be easily mounted on-an 'apertured surface made 7 of thin material without a cooperating part on the other side of the surface and without the necessity of having an additional'helperworking behind the surface to tighten the usualrnounting It has a positive action and rigid mem- It will also be noted that. thesize of the lampholder will, not be determined by the size of the aperture in the mounting surface, and that" Moreover, my'lampholder does not have parts of substantial size extending .in back of the mounting surface to take up 'wiringspace or to set forth the invention, it is ;to .be understood thereto and releasing it therefrom.

line terminals,a frame secured in a rear recess of said housing and centered in said housing, said frame comprising a base perpendicular to the axis of said housing with a tapped hole in its center and aplurality of side walls radially disposed'to the axis of said housing, a plurality of levers pivotally mounted on said walls and radially disposed to theaxisofsaid housing, said levers-projecting-.beyond the rear of said'housing,' a screw threaded into saidtapped holefin the base of said frame in engagement withsaid levers for moving said levers radially toward and away from said axis for engagement and disengagement respectively of' said leversifrom the aperture of said surface, said screwbeing'ac'cessible from the front of the lampholder through a passage between saidfrontandrear recesses and a perforation in the center. terminal of said lamp receptacle, whereby said lampholder may be secured to and disengaged from Saidapertured surface by operatingsaid pivoted levers from the front of the surface. 1 f

'2. A lampholder adapted to be mounted against the face of anapertured surfaceromprising a housing recessed at its fronteend, a lamp receptacleeinfl said recess, a plurality of bell cranklevers each having inner and outer angularly disposed arms, means for pivotally mounting said levers on the back; end ofz'said housing with said levers distributed in :radial planes around the axis of said housing and with their inner arms adjacent to said axis. and a screw accessible from the front endof the'lamp- .holder having a pair of spaced, outwardly extending, opposed shoulders to. provide opposed bearing surfaces engaging the said inner arms of said levers for moving the same and thereby moving the outer arms of the levers into and out of engagement with the edge of the aperture of said surface for securing the lampholder V 3. A lampholder adapted to be mounted against the face of an ap ertured surface comprising a housing recessed at its front end, a lamp receptacle having a perforated center terminal centrally disposed in said recess, an axial passage in said housing extending from said recess to the back .end of the housing, a plurality. of hell crank levers each' having inner and outer angularly disposed arms, meansforpvotally mounting said levers on the backendpf .said housing with said levers distributed radial" jplanes around the axis of said housing and with their inner arms adjacent tosa'id axis and a ,screw extending'th'rough said passage andacc'essible from the front of the. lampholder through said .apertured contact, saidwfscrew having opposed bearing surfaces engaging the said'inner arms of said levers for moving the same and thereby 'moving the outer arms of the ,leve'rs into-- and out of engagement with thee'dgerof the aperture 5 of said surface for securing the lampholder thereto and releasing it therefrom.

4. A lampholder adapted to be mounted against the face of an apertured surface comprising a housing recessed at its front end, a lamp receptacle having a perforated center terminal centrally disposed in said recess, an axial passage in said housing extending from said recess to the back end of the housing, a plate mounted on the back of said housing and having a plurality of side walls extending therefrom disposed radially to the axis of said housing, a plurality of bell crank levers each having inner and outer angularly disposed arms, means pivotally mounting said levers on said side walls with said inner arms adjacent the axis of said housing, a screw extending through said passage and accessible through said apertured contact and being threaded into said plate, said screw having spaced shoulders engaging the ends of said inner lever arms for moving the same and thereby moving said outer lever arms into and out of engagement with the edge of the aperture of said surface for securing the lampholder thereto and releasing it therefrom.

WILLIAM R. YOUNG.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS