US1808782A - Lamp socket - Google Patents

Description

June 9, 1931 R. E. MAJO LAMP SOCKET Filed April so,v 1930 2 j i 4 17 a \E 4; =5 11 0 J jab- 12 fioac oe E fi a/br.

Fig. so

pilaster projections 2.

Patented June 9, 1931 UNITED STATES PATEN OF IC noscon E. MAJOR, oFcH'rcAGo rumors, AssIGNoR TOMA-10R nouiriinnr co ard);

. r CORPORATION OFILLINOIS riamrsocxm amination filed a rn so,

The main object of this invention is to provide an improved form of lamp receptacle which can be installed in an aperture on a plate or in a conduit outlet box, and provided with improved means for securing it in place and for holding a lamp reflector:

An illustrative embodiment of this inven' tion is shown in the accompanying drawings in which: a Figure 1 is a front view of a lamp res ceptacle, designed for mounting on one side of a plate for attaching a lamp and reflector on the other side.

Fig. 2is a back view of the same.

Fig. 3 is a cross section on the line 33 of Fig. 1.

Fig. 4 is a fragmentary View of the front plate of a conduit box with the receptacle in place in one of the apertures.

Fig. 5 is a fragmentary sectional v1ew of a reflector adapted for use with such receptacles. i

Fig. 6 is a sectional vlewon the line 6-6 of Fig. 5. 1 Fig; 7 shows the face of a conduit box with a receptacle installed, and the base of the reflector locked in place. Fi 8 is a section taken on lme 8-8 of In "the form shown in the drawings the lamp receptacle body 1 may be formed of molded insulating material, such; as thermophase. The receptacle body 1 1s provided with four symmetrically placed wing or Centered in each pilaster projection is a molded-in metal 1nsert 3, which is internally threaded to receive a round-head machine screw 4. Gentrally located in the lamp receptacle body 1 is a well 5, which forms the housing for a screw shell 6, which is provided w1th base flanges 7. On top of the flanges 7 are placed washer plates 8, and screws 9, which mechanically fasten the screw shell 6 to the terminal yoke 10. The center lamp terminal is installed in the bottom of the well, and comprises a slidable metal plunger 11, which is normally held in a fixed posltion by a bent lever spring 12, and also by a helical spring 13, which is seated on a ledge 19s'o;seria1 No. 448,708.

in t plunger aperture. The leverspring 12 is mechanically secured; to the center lamp'terminal 14 by screw, 15.;

The. assembly comprises bending a straight lever spring at-right angles, plac ing the screw 15 in lockingposition, bending the lever springto its normal position, inserting the'coil spring 13, and then placing the metal plunger 11, whichfis of tubularrivet form atthe lower end. The tubularwrivet end is upset over the center terminal 14. The line Wire securing screw: 16 engages threads in the" center terminal 14. The terminalyoke 10 has a similarlme wire terminal screw 17, which engages-a metal insert 18, molded in the lamp *receptacle body. The face plate 19 is provided w1th apertures 20, comprising a circular cutout 21, and a symmetrical overlying rectangular cutout 22, the rectangular cutout having. a length substantially twice, 'the diameter of the circular portion and a width 1 1 about one-third of such diameter. I j

Located at right angles to the longitudinal axis of the' rectangular cutout are punched perforations 28, a which are placed to receive the screws 4, which arethreaded into the metal inserts-3 of the receptacle. The receptacle face has ifour machine screws 4, two of which are used to fasten the receptacle to the plate 19, and theother two are exposed-through the rectangular cutout. 7 The baseof the lamp reflector has mentral outlet 24, and "four perforations 25, each large enough to pass thefheads of the screws 4. Two ofthe apertures are offset circumferentially from symmetrical pos'i tion, and: the offset apertures are provided with key hole bayonet slots 26, whichpass the shank offhe screw I Y The installation tr. this improved" socket with its reflector consists-fin placing the socketinthe outlet aperture of the pla'te and securing the" socket tO thQ plate by-two screws, the. heads of which projectfabove theplate. .The twoscrewsleft exp0sed are then loosened, and the offset'keyhole per forations in the reflector base are passed over the heads of the screws." The reflectorbody isthen turned to the right and the bayonet lamp terminal is not removable. Thescrew.

shell is removable without disturbing the relative position of the parts or thewiringz, since the line .wire terminal screw on the yoke is threaded into the bodyof the "re cjeptacle Hence, "the screw shell; can be removed without changing the position, ofthe yoke. In a similar manner the lamp reflector can; be removed and replaced by backing out thejtwo screws which perform no other function other than that of. holding thelamprefiector.

Although but one specific embodimentv of this. invention isjherein shown and described,

' itwill be understood that detailsof the construction shown may be altered or omitted without departing from 1 the spirit of. this invention as defined, by "the following claims; 1 1

I c a m-.2.

1,. An electrical outlet,- comprising. a lamp 1 receptacle, a; base plate having: an. outlet aperturaand having large and; small perforations arranged about said aperture, a

reflectorhavingan outlet aperturefanclhavs screws when said first pa1r.of apertures are ing round and key hole perforations arranged about said aperture, a pair of plate attaching screws in. said receptacle. coacting with the. small perforations in, said: base plate, and apair of reflector" attaching screws. coacting with, thewkey hole perfora tions'in, said reflector, and said; round: reflector perforations registering with the i heads-of the plate attaching. screws.- I

I '2. Anelectrical outlet comprising a'lamp receptacle, symmetrically laced screws threaded intothel-body of said receptacle,

a; base plate: haying an outlet. aperture, symmetricallyplaced perforations in said: plate.

some ,ofsaidperforations being smaller than vthe heads of said screws, others; larger than the. l1eads;;0f; said "screws, ae lamp reflector w having round ands-key; hole perforations l about theoutlet 7 aperture; registering with the perforations inQsaid-plate, said receptacle being fastened ;-to said; base plate by screws through the smallperzforationsl with. the I heads prpjectinga abovesthebase plate, said reflector being fastened; to. said receptacle fby $Qr WS-. h i 1ghithe keyhole perforations k idi refle or and he: larger perforations ii -said plate, andgthe headsof'the plate fasfqrat 'ons insaid reflector;

teningsrews coacting. with the roundjperhaving V of said screws, a'reflector having round and keyhole perforationsregistering with" said plate perforations, said receptacle fastened to, said plate by screws in the smaller per forations in said plate, saidreflector fastened to said receptacle. and platebyscrews using the keyhole" perforations in said reflector,

the heads of the. receptacle fastening screws registering; with round perforations' n sald reflector requiring backing out of said refiector fastening screws to release said reflector from. coaction with said receptacle fastening screws. l

4. A lighting fixture comprising a su portingplate having'a socket aperture, a receptacle body having a projecting r m fitting said aperture, a lamp housing having a'base apertured to fit said receptacle r1m, a

pair of oppositelylocated headed screws.

threaded .into said receptacle body for fiiring said receptacle on said plate,,a second pair of oppositely located headed screws threaded in said body, said plate being apertured for said screws,'and said housing having initsbase apairof apertures to receive V the heads of: said first named pair ofscrews and, a. pair of key hole slots positioned and. shaped to receive the second pair of sald outof alinementwith their respective screws and to permit rotation of said housing on the;-- second. pair of. screws to. bring said aperturesinto engagement with the heads of said first pair of screws;

Signed a Chicago thi 26 cl sr'fn rii RQ CQE 11 MAJOR:

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