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Publication numberUS1849966 A
Publication typeGrant
Publication date15 Mar 1932
Filing date2 Dec 1927
Priority date2 Dec 1927
Publication numberUS 1849966 A, US 1849966A, US-A-1849966, US1849966 A, US1849966A
InventorsNathan L Ureles
Original AssigneeNathan L Ureles
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Lighting fixture
US 1849966 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

March 15, 1932. N. l.. URELES 1,849,966

LIGHTING FIXTURE y lVaZzazzLUreZe Patented Mar. 15, 1932 unirse STATES PATE NT `ort'rlczr.


LIGHTING- FIXTURE My present invention relates to lighting fixtures and is more especially concerned with a fixture of the type, the canopy, panel or base of which embodies a casing or shell for a switch or a lamp socket within the construction thereof.

It is among the objects of the invention to` provide a lighting fixture of the above type, the canopy or panel of which may be securely installed against the ceiling, wall or ioor, the casing of the-switch or socket being securely located therebehind, with the operating element of the switch, if any, conveniently accessible, without the'need for disfigurthe canopy or panel or rendering the same asymmetrical; which obviates the need for different hickeys or for special adaptors to suit various depths of outlet boxes or panels, and is yet positioned with the utmost facility, dispensing even with the need for preliminarily adjusting the parts to'suit the dimensions of the outlet box, canopy-or panel.

In aipreferred embodiment I provide a hickey which serves to mount the switch or socket aswell as the panel or canopy and is itself mounted on the stud, cross-bar or other ,part of the outlet box. The hickey has its parts displaceable toward each other for 'adaptation tothe depth of the outlet box and canopy or panel, said parts being automatically locked to restrain extension of the hickey, so that the panel or canopy is securely heid in position by the hiekey. Preferably y a part of the switch case construction mount- Aed on the hickey extends through the panel or canopy and is encircled bya nut, ring o-r other device for securing the canopy or panel in position.

In the .accompanying drawings in which are Vshown one Aor more 'of various possible embodiments of the several features of the invention, i y V Fig. l is a view in longitudinal cross section showing a` ceiling fixture or canopy.

Fig. 2 is a dropped perspective View showing the constituent'parts of the hickey.

3 is a perspective view of a preferred form of hickey therefor in collapsed position.

F ig. 4 is a view in longitudinal cross section showing a walll bracket application.

Application filed December 2, 1927. Seria1-No. 237,190.

Fig. 5 is a dropped perspective view illustrating the hickey or bracket of the embodiment of Fig. 4iand, I y

F ig. 6 is a fragmentary View similar to Fig.

4 illust-rating anotherv application to a wall 55 bracket. y l

Referring now to Figs. l, 2 and 3 of the drawings I have shown a ceiling bracket fixture comprising any outlet box l2 having the. usual stud 1l and a conventional canopy l5 60 on which may be mounted ashade holder l5. To support the usual lamp socket S` and to carry the canopy I provide a hickey whichV in this case is of collapsible construction for ready adaptation to thevarious depths of 65 canopy and4 outlet box.

The hickey, in this case, illustratively comprises three interiitting sections, A, B and C. The innermost of these sections A, which I, y call the stud seetionfhas illustratively an in 70 turned threaded socket l() for attachment on the stud l1 of the outlet box l2. The outer or canopy section C preferably includes the integral split ring 13, encircling the shank of f the lamp socket S preferably immediately be- 7'5 low the shoulder 9 thereof, and clamped thereinto by a clamp screw 8 through lugs 7 integral with ring 13. Other means for rigidly combining section C and the socket may be employed. f

y The sections A, B and C of the compound hickey are preferably'in telescoped relation and are shown embodied as yokes, the stud section A having a pair of upstanding lateral yoke arms 18 and 19 encircled by the prefer- 85 ably rectangular open base frame 20 of the intermediate' section rIzzi which has upstanding yoke arms 21 and 22 flanged over at 23 to form guides or tracks for the sliding move-v ment thereof relative to the respective arms 9o ed position, the length of the hickey is nearly three times the length of an individual yoke.

I may employ a pawl and ratchet connection between successive yoke sections of the hickey. Illustratively, the head section has a pawl, preferablyv a. spring arm 27, riveted welded or soldered'in place at its base. The pawl coacts with ratchet teeth 29 in the corresponding arm 22 of the intermediate yoke piece B. In a preferred construction, the ratchet teeth 29 are struck out of the metal of the yoke arm, entirely between the sides thereof. Illustratively, the ratchet presents a herring bone shaped aperture presenting integral teeth 29 extending inward from opposite sides of any otherwise rectangular aperture 30. The teeth 29 present square edges 31 above (in Fig. 1) and oblique edges 32 below, V"so that the pawl will overrun the ratchet when the yokel pieces are pressed together and the square edges 31 ofthe ratchet teeth 29 willresist and prevent extension or separation of the yoke pieces, since the squared end of thejpawl tooth cannot be pulled therepast. VOther, equivalent ratchet constructions may be used. I

I provide a second spring pawl 35 on the right arm of the intermedia-te section B, coacting with a ratchet construction 36 on the corresponding arm of the stud section A, and identical with the ratchet of the intermediate y section B.

The opposite arm 19 of the stud yoke is preferably longitudinally bifurcated to afford a channel 37 through which extends pawl tooth 27 to engage the ratchet 31, even when the stud yoke is telescoped inward into the intermediate yoke, as in Fig. 3. As shown, the arms 19 and 22 of the stud and inter- -mediate yokes respectively, extend between the yoke arm 25 and its pawl arm 27. Preferably, each ofthe pawl arms has rigidly affixed near the tooth end thereof a push button 38 on the outer end of a pin 39 aflixed thereto andprotruding from the corresponding yoke arm. Yoke piece A has inturned teeth 40 at the extremity of the ratchet 36 thereof, against which the tooth of the pawl 35 abuts in extreme extended position." Yoke ratchet 30 has similar teeth 41, similarly arresting the tooth of .pawl arm 27. Yoke piece B has a tooth 43 at the end of its flange tracks 23,y

'andarm 24 of the outer yoke piece has a similar tooth 44. The'teeth v43 and 44 extend` at'right angles to each other and thus edectively limit the separation of yoke pieces sary, to maintain the push buttons 38 de-I pressed for disengaging the corresponding pawl with the ratchet, while drawing the yoke elements apart.

' With the various types of canopies, panels or bases of lighting fixtures now in vogue, the three-section compound hickey affords the range of length required toaccommodate any installationk from the shallowest canopy on the shallowest outlet box to the deepest canopy on the deepest outlet box. Obviously, however, the concept of my inventionmay be carried forward, if necessary, to provide a compound hickey of four or more relatively telescopedsections. On vthe other hand, if desired, the hickey may be made in but two sections, a stud and a head section, directly connected by a pawl and ratchet or equivalent connection, which construction would accommodate a practical range of installations, in fact, would be suitable in all but the more extreme cases.

n To install my fitting, the compound hickey (in which the lamp socket shell S has been previously positioned by tightening split collar- 13 thereabout) is threaded at its stud section 10 upon the outlet box stud 11. The electric conductors passed through bushing 51, are connected to theterminals within the lamp socket S in the usual manner. rlhe hickey being preferably in fully extended position, canopy 15 is applied thereover with the end of the lamp socket S projecting therethrough. Thereupon a nut, threadedl vis securely pressed against the ceiling or other wall. VThe canopy cannot now b-e pulled out by manual tension, since the pawl and ratchet connections are securely locked to prevent extension of the compound'hickey.

By my invention, it will thus be seen that the application of the canopy is accomplished with vthe utmost facility. No hickeys of special size need be kept in stock, nor need the universal'hickey be adjusted or specially set by distinct preliminary operations, or adjustments or by the use of adaptors, nor'are successive approximations by trial and error necessary, nor groping to locate concealed screwV holes. The complete installation of negarse the fixture is accomplished in buta fewseconds.V The installed-construction presents no protruding screws or holes that tend to ydisligure the canopy. The application moreover, does not interfere in any way orrender it more diflicult to wire the fixture;V i. The socket may be `of the pull chain or of; the keyless or switchless type.

Disassembly is accomplished with the same facility as installation. ,For thispurpose, the screw Vcollar 52 is merely` unscrewed, whereupon the canopy can be removed andv the compound hickey with its lamp socket switch S can be unscrewed from the studll. lith the hickey thus removed the lamp socket lswitchcan be removed and replaced. The

hickey can be re-extended by pulling, vWhile depressing linger piece 38.` The hickey can then be re-applied to the same'or to other fixtures in the manner above described. i l

In the embodiment of Fig. 4 is shown a wall bracket application. I haveillustrative- 4lyi shown a collapsible hickey of but twosections, though three sections, as'shown inthe ceiling. lixture are preferred. The hickey shown comprises a stud section A threaded upon'the stud 11a of the outlet box, and' a conary canopyswitch 60 may be employed, illustratively the conventional circular switch shown, the 'threaded' shank 61 of Awhich is merely screwed through an opening 62 in the end of the outer section C of the'hickey.. Illustratively each section of the hickey j is shown of angle shape withfbut one arm, instead of a pair of arms Vas inthe embodiment of Fig. l, although a pair of such arms may 'be employed if desired. TheQp'awl land ratchet connection between thetwo sectionsofthe hickey may be similar to `thatofany! twoof the sections in the embodiment ofFig l'and need not therefore be fully c lescribed.v (Corresponding parts bear Athe 4same reference numerals with exponenta. f 'l f From the foregoing it will `be understood that for installing the Wall bracket, the hickey with the switch 60 vthreaded thereinto,`is extended to itsutmost and mounted at itsstud section A upon the stud 11a. Thereupon the panel 15a is passed at itsjcentral aperture .over the shank 6l of the switchand pushedl to- Ward the wall. VThe pushing thrustgagainst the end of the compound hickey will lcause the latter automatically to collapse, 'the ratchet'laoverriding the piawl27a`i1ntil the edge of the panel-has reached the Awall. Thereupon nut 63Vis simply threaded upon the switch shank thus clamping'the panel in position. Upon screwing switch button 64: on the switch 'spindl'e the assemblyis completed. j v

It will be seen that Vwhile the compound hickey readily collapsesfas set'forthypulllbr tension upon the nut 63 will be ineffective' to cause the hickey'lto reezdendl since therpawl `requirements of practical use.

27a locks against a square shouldercftheinglon thepawl linger 38a.' 4

Ther embodiment of Fig. 6ffis similar to that of Fig. 5 :exceptthat I have there shown'a -mode of' application of. ahickeytofan4 outlet boX devoidof -a studn -The outletboX is there.` shown with a cross-bar 66 held I=by screws 67 vagainst'inturned lugs 68v of thetbox,

-and'having a central outstanding socketv69 `upon which the stud section A2 of .the hiclrey is threaded. :I have here illustratively shown al'canopy switch 69 of thev rectangular'lv type which does-not admit of being threaded into thehead 'section of the hickey inthe manner "of the switch shown in Fig.- 5.1 Accordingly a thin clamping nut 70 is shown inlthis Aembodiment threaded upon the switch shank. `'Z1 and serving to secure the switch Ltoithe outer section of the hickey'as'shown. Y t- VTh It is,of course, to be understood thatAd-ifferent types of canopy 4'switch may 'be' em ployed'in eitheriof the embodimentsto Figs.

-5 and and that the switch there shown may 'be Ainterchangeably used; The vterm panel as used inthe specification except where'specifically limited'toV a tions and lthewall bracket'hickey as of ltvv-o sections, it will be understood that the Walla... bracket 'lXtll'le may be and' preferably is made of three sectionsandit'will in general be sullicient' tomake the 'ceilingliixture'of but two'sections. It is` only for convenience of illustration Ithat Vthe parts have been shownon th'edrawings with three sections""on`the hickey is here illustratively shown o'f thefyoke'typa `eachsection having a pair :of Yarmsas iii-Fig'l.` l 1 f H' f'f acting switch mounting section C. An or-di- I .31o be extended-upon release ofthe pawl by push- 'l ceilingland, onlytwo -onthewall'b'raclret i'irrture... Y l v n i It'willt'hus beiseen'that there herein described apparatus in :which the several features of thisfinventionfare embodied, and

rwhich in'its action attains' the various objectsv i of the' invention and is well suited tomeet the A's lmanychanges could berna-de in the above-construction, and manyapparently widely different embodiments of thisinven- '..tion could be made without departing'from the vscope thereof, it is intended that all matter contained inthe above descriptionor shown in .thea'ccompanying drawings shall be interpreted as illustrative and notin a limiting sense. i

V i Having" thus described' my invention, A`what yto ' and kmeans to secure said panel with respect outer fitting part I' claim as new and desire toisecure" by Letters-Patent of the United States is I 1. 'A lighting fixture including the combination of an inner holding element adapted for direct attachment to an outlet box', an

outer holding element complementary to said inner element and displaceable relative thereto, a lamp socket carried by said outer element and having a protruding shank, means for attachingv a fixture panel in position upon said shank, said outer holding element being movable inward with respect to the inner one,

byv thrust such as may be transmitted in the application ofthe panel in position, and automatic locking means for preventing relative rseparation of said holding parts, whereby the panel will'restrain further inward movement of the outer holding element, and the `automatic-lock means will prevent separation of said outer element and the panel, and means for releasing said automaticvlocking means to permit relative separation ofthe holding parts.

2. A lighting fixture comprising the combination of an inner holding element having means forv attachmentthereof in fixed position with respect to an outlet box, Aand an outer holding element having-a ,pawl and ratchet connection with respect to-saidinner .holding element, a lamp vsocket carried by said outer element, a fixture panel, through which part of said socket vprotrudes, 'and .means secured to said protruding part to clamp the fixture panel in place, said lratchet connection locking against separation of the holding parts, but yielding to inward thrust, manually operable means for' throwing out the ratchet and means vpreventing disassembly of the holding elements -even when the ratchet is thrown out.y

" automatic lock means forretaining said re- -spectlve fittings against further separation from any particularv setting thereof, a panel,

tothe outer fitting part.v

V4. A lighting fixture comprising a compound extension fitting including an inner mountingyoke having a part adapted for Y attachment upon an outlet box, an intermediateyoke having a. frame displaceable along the arms of the first yoke and having rarms "protrudingtherebeyond, andan outer yoke part having arms slidable rwith respect to the armsof the intermediate part, a lampfsocket l carried thereby having an element for securing a fixture panel in position, andautomatic lock means resistingrelative separation of each of said parts'relativeto its neighbor and permitting approach of saidl parts to fully collapsed position.

5. A lighting fixture, comprising an inner mounting yoke having a-body adaptedV for attachment uponan outlet box, and having a pair of arms protruding therefrom, an'rintermediate fitting part comprising aframe extending about said arms'and havinga pair of yoke armsl therebeyond, an outer yoke, a lamp socket extending through the end of said outeryoke and secured'thereto, said outer yoke having a pair of arms slidably guided with respect to the armsof the intermediate piece, and ratchet pawl connections between the respective pieces to automatically lock the same inany setting thereof, While yielding freely to further collapse-for contraction thereof.' z .f f

6. A-lightingfixture including a plurality of interfitting 4parts relativelyslidable to permit extension or retraction, for accommodation'to outlet boxes and panels of various depths, and including an inner mounting.

yoke and an outer mounted yoke, the former being adapted for attachment upon an outlet-box, the successivesections having pawl 4and ratchet connections with respect to each other, 'automaticallylocking in the direction i of extension thereof, each of said pawls having, a fingerrpiece that permits release thereof for extension of the corresponding fitting parts, and-a` switch casing between the arms of the outer yoke having a shank protruding :L

therefrom, a panel, anda threaded ring about sa1dshank,v and securing the panel in place.

7. A lighting fixture ycomprising the combination of a fitting adapted for attachment to any outlet box, (a. complementary fitting, a 'j `lamp socketr carried by said latter fitting, a

fixture panelhaving a centralv opening there- 1n through which-said socket protrudes, and an attachment ring yupon lthe end of k said socket for clamping said-panel in position,

the .outer ofv said fittings being displaceable 1n the application of the panel for adaptation :to the depth thereof, and automatic latch 4means for, locking the outer of said fittings against separation 'relative to the inner.

8,. A lighting fixture, comprising the combination of a fitting having a part adapted to be threaded upon the stud of an outlet box, and including a'pair of'yoke arms, a comple- I nentary 'fitting includingv a pair of `yoke f.. arms slidable withrespect of said first pair andv a lamp socket. casing,vclamp means s'el curing vrsaidcasing to said complementary fitting, a canopy over. said socket, and a shell .threaded upon the shank of said socket cas- 111;

ing', to clamp said canopy in position.`

' -9. Alighting fixture including an inner yoke adapted to be threaded upon the stud of an outletbox, an outer yoke having; a pawl and ratchet connection with respectto said inner yoke restraining relativeseparation of said fittings, a lamp socket shell mounted between and clamped to the outer of said yokes, a canopy, and a screw collar for securing said canopy with respect to said shell whereby the fitting becomes automatically adapted to the depthl of the canopy in the application of the latter and the ratchet automatically locks the same against separation or loosening of the canopy.

10. A compound extension fitting for a lighting fixture comprising an inner mounting yoke having a body adapted for attachment upon an outlet box, including interfitting parts relatively slidable to permit extension or retraction, for accommodation to outlet boxes and panels of various depths, the sections having pawl and ratchet connections with respect to each other, automatically locking in the direction of extension thereof, each of said connections having a finger piece that permits release thereof for extension of the corresponding fitting parts. l, l

11. A compound extension fitting for a' lighting fixture, comprising an inner mounting yoke having a body adapted for attachment upon an outlet box, including Va plurality of interlitting parts, each being slidably guided with respect to thecontiguous one, the fitting part other-than the outermost one having a ratchet, and a pawl on each part coacting with the ratchet on'the succeeding part, said pawls and ratchets over-running to permit collapse or contraction of saidcompound fitting and vlocking to prevent separation thereof, each of said pawls having` a finger release operable without permitting sep-- aration of the interfitting parts.

12. A compound extension support for a lighting fixture, comprising an inner mounting yoke having abody adapted for attachment upon an outlet box, a plurality of yokey members relatively extensible and collapsible, the yoke members in collapsed condition being of length in the order of that of oneof said members, said yokes in extended position being of'length in the order of the combined lengths of said yokes, veach of said yokes having a slidable guide connection with respect to the contiguous yoke, a pawl and ratchet connection between each yoke and the succeeding one, each pawl over-running the coacting ratchet to permit collapse of the compound support, and locking with respect to the ratchet to prevent extension of said compound support. j

13. A compound extension support for a llighting fixture, comprising a plurality `of interfitting sections, with pawl and' ratchet connections therebetween and including an inner mounting yoke havinga body adapted for attachment uponanV outlet box, and finger pieces for disengaging the pawl elements of the respective ratchets.

\ 14. A compound' support for a lighting fixture, comprising a plurality 0f interfitting yoke elements, each slidable on the arms of the succeeding yoke piece, each of said yoke iecesbeing connected tothe next'yoke piece p.

y means comprising a supporting'pawl on an arm of one of the yokes, and ratchet teeth on the corresponding arm' of'tliesucceeding, yoke, each supporting pawl having anger piece at the pawl teeth end thereof, and protruding from an arm of the corresponding yoketo permit retraction of the pawl by release'of the latter, said pawl' and ratchet connection in set position preventing extension and permitting collapse of the support.

15. A compound extension fitting for Y- a lighting fixture comprising an inner mounting yoke havin(T a body adapted for attachment` upon ain-outlet box, a plurality of interfitting yoke pieces, each having arms slidablc with respect to those of the succeeding yoke piecefor adjustable Yextension or contraction of the yoke piece, the connection be-y tween each yoke piece and its Aneighbor comprising a pawl affixed to one of said vpieces and aratchet on the other, said pawland ratchet connection over-running in collapse, and locking to prevent extension, a finger piece for each of said pawls to permit release thereof, each of said yoke pieces having an upstanding stop to limit separation of the parts both in locking and retracting position of the pawls, thereby to prevent disassembly of the compound fitting. Y

16. A compound extension fitting for a lighting fixture, comprising an inner mounting yoke having a body adapted for attachment upon an outlet box,said yoke comprising an inner yoke piece adapted to Vbe mounted on an outlet box and having upstanding yoke arms, one of said arms conformed with ratchet teeth, an intermediate yoke piece comprising an open rectangular framesnugly engaging said yoke arms and a pairof upstanding arms laterally flanged to engage the arms of said inner yoke, a'panel yoke'having yoke arms with flanges straddling the fianged arms ofthe intermediate yoke, a supporting pawl on one of said outer arms, a ratchet in the corresponding arm of the intermediate yoke, a pawl in the other arm of the intermediate yoke and a ratchet in the correspond-1 ing arm of the inner yoke, the arm of the inner yoke being bifurcated to afford clearance in collapsed condition for the pawl and ratchet connection between other elements.

17. A lighting fixture having complementary inner and outer support fittings,'the

former adapted for attachment to part-of an outlet box, the latter having a casing memberA associatedtherewith, a fixture panel, means secured to the outer part of said casing for clamping said panel against said outer fitting, the outer fitting being freely displaceable inwardly in the application ofthe panel for accommodation'to the depth thereof, latch means locking the said ittings against separation and means enclosed bythe panel and accessible upon removal of the panel forA releasing said latch means.

18. A lighting ixture including a yoke having a mounting. hub adapted for attach-l ment to the stub of an outlet box, said yoke having-arms spaced suiliciently to straddle a lamp socket, a complementary yoke piece having an annular part to encircle said lamp of installation for adaptation to the depth of said panel.

19. A device of the class described comprising an annulus adapted to receive therein and to support a socket shell, said annulus having a supporting portion, a bracket adapted to be secured to an outlet stud and having an annulus supporting portion to extend away from the stud, said supporting portions being complemental to one another and having means vfor, guiding said annulus as it is moved longitudinally of the supporting portion on the bracket, teethjformed on one of said portions, and a spring detent'secured vto the other of said portions and adapted to permit free movement of' the annulus along the bracket supporting portion in one direction Without manual release ofthe detent and to vreleasably and automatically rengage said teeth as the annulus is moved longitudinally of the supporting portion on the Vbracket in said direction, said detent preventingmovement of the annulus in theother direction without manual release thereof, and having a inger piece projecting through Y said bracket supporting portion for manual engagement as the annulus is adjusted.

20. A' device of the class described comprising au annulus adapted to receive therein and to support a socket shell, said annulus having an upwardly extending arm, a bracket adapted to be .secured to an outlet stud and having an arm to extend away from the stud, said arms being complementalto one another and having means for guiding said annulus as it is moved longitudinally of the bracket arm, teeth formed on one of said arms, and a spring detent secured to the other of said arms and having a linger p-iece projecting through the toothed armand adapted for engagement Y for manual release of the detent to permit movementvof the annulus in one direction, said detent permitting free movement of the annulusin the other direction adapted releasably ,and automatically to Aengage said teeth as the annulus is moved longitudinally of thebracket arm in said last mentioned direction. i o j v, l y .I

2l. A device of theV class described'rcompriising anannulus adaptedto receive there- Vin and to support a socket shell, .saidk annulus having an upwardly extending arm, a bracket adapted to bersecuredto an outlet stud and having an arm to extend away rOll the stud, said arms being complemental ,toA one another and having means for guiding said annulus as it is moved longitudinally of the bracket arm, teeth` formed on one of said adapted to be secured to an outletstud 'and having an annulus supporting portion to extend'away from the stud, said portions being complemental to one another and'- having means for. guiding said annulus as it is moved longitudinally of the annulus supporting portion, teeth formed on onerot said portions, a spring detent secured totheother ofsaid portions and adapted releasablyto engage said teeth as the lannulus is moved longitudi; nally of the bracket portion, said detent having a part extending through openings-Vin said portions to'provide a manually engageable part, the opening in said toothed portionbe ing a longitudinally extending slot to permit said detent part to project therethrough and to move alongv the bracket portion, the teeth being disposed along the edges ofsaid slot.- A

V23. A deviceof theV class describedjcom# prising a bracketl adapted toV be attached/to an loutlet stud and having a. longitudinally slotted arm arranged to extend away from the stud, series ofv teeth formed on thearm, an annulus adapted to receive therein and to support a socket'shell, an arm extendingl upwardly from said annulus complemental to said bracket arm, means on one of said'arms for guiding the annulus arm longitudinally of the bracket arm and a springdetent'secured to said annulus arm and automatically engageable Withrsaidteeth to resist 'movement of the annulus on the bracket, said detenthaving a portion extending through the bracket arm lfor manual engagement. j

24. A Vdevice of the class described ycomprising a bracket adapted to be attached vto an outletgstud and` having a longitudinally slotted farm arrangedto'extend away from the stud, two series of teethformed on the arm along the edges of the slot, an: annulus adapted to receive therein and to support a socket shell, an arm extending upwardly from said annulus complemental to said bracket arm, means on one of said arms for guiding the annulus arm longitudinally of the bracket arm and a spring detent secured to said annulus arm and automatically engageable with said teeth to resist movement of the annulus on the bracket, said detent having a part extending through the bracket arm for manual engagement, and laterally extending shoulders on said detent engaging the tWo series of teeth along the tWo edges of said slot.

Signed at Jersey City in the county of Hudson and State of New Jersey this 30th day of November, A. D. 1927.


Referenced by
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US3190604 *4 Sep 196322 Jun 1965Square D CoBus duct hanger
US4403277 *30 Jan 19816 Sep 1983Cooper Industries, Inc.Industrial lighting illumination
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U.S. Classification248/343, 362/439, 439/529
International ClassificationF21V21/02
Cooperative ClassificationF21V21/02
European ClassificationF21V21/02