US972577A - Electrical fixture. - Google Patents

Description

y y F. EfSEELB".V y ELECTRICAL FIXTURE.

inmonmrrnnn'mxs 11, 19'09.

f r972,577'.y y,

- Y Patented oec. 11',1910.-L

Arroxnev UNirnD STATES' PATENT OFFICE.

."RANK E. SHELBY, 0F RIDGEPORT, CONNECTICUT, ASSIGNR 'IO THi-BRYANT ELECTRICCO'MPANY, l01? BRIDGEPORT, CONNECTICUT, A CORPORATION 0Fy CON- NECTICUT.

is a pers ective of the body of a lamp socket to whci my invention is applied in one form; Figs. 2,3 und 4 are vertical sections through portions ofn the sockets having cgips of various forms en'xbodyingmy invention; Fig. 5 is a broken verticul section through 'a pendent switch to which my invention is npphed in another foren; au Fig. 6 is u. vertical section through n similar rosette.

In its main features the socket shown in Figs. 1 to 4 is of the usual construction with screw shellSnnd upper and lowerinsulating buttons A sind l between which the switch mechanism may bc located. The terminals T are .located in recesses in the side of insuluting body with wire grooves G opening into the same. On the top of the button A I now lpro to form n relatively sharpange F pre erably annular 'as shown in Iig. 1, over the outer face and upper edge of which the wire coming from t e termmal must pass. Coperating with this flange I propose to form in connection withihe cap C'suitnble means for de ressing the wire so'tlmt the latter is forcer; int'c' a sharp U bend over the edge of the .flange F. This may be accomplished invarious ways. Thus for instance 1n Fi 2, theY insulating bushing I is eit-v so fur down into the interior of the* tende ce J that it depresses the wires lV'. into the welll formed by the tiene@ F thereby secur- 'ing the requisite sharp bend over the edge of the latter. A sharp bend over the edge of the bushing is also given to the wire so that in fact un S bc'nd at least one loop pf n Fig. 3 the insulating bushing l( screws into :i metallic bushing L and the distance which it extends into the interior of the shell may LECTRICAL FIXTURE.

Specication of Letters Ptent. Patented Oct, 11', 1910, Application med :une 11, 1909. semina, 502,742,

thus be regulated. This is a valuable moditication since it permits the adjustment of thel strain relief members to suit different makes and sizes of wire which may be em'- ploycd in Wiringv up the fixture.. ln Fig 4 thc customary metallic bushing M with insulating lining N is shown, the bushin@r M however being provided with n depending skirt m which engages and dcpresses the wires inr like manner as in the constructions just described. i

In Fig. Sthe device is applied to a endcnt switch. In this modification in ad( ition to the flange F I propose to provide a centrati s boss f, thus forming n channel H into which the annular skirt of the bushing forces the wires.. It will be observed that the boss f not only insures an S bend, both loops of which 'are sharp since the Wire is directed sharply unwardnby the boss, but that it offers another friction surface against which the wires bear and thus still further lessens the strain upon the binding posts. l y

Obviously the flange F need not be con;

y tinuous but may he of any desired shnpeand sine. although 1t is preferably continuons as shown since in this form the wires cannot be carried outI of the cap without. passing over` the Harige, und it is thus impossible to wire Y up the fixture Wit-houtbringing the Strain relief feature into play. Nor is it necessary that the flange be formed in the position. indicated. l

I do not limit myself to the embodiments of my invention illust rutcd, but y I claim, 1. An electric device having separable members, means 'for uniting the sume, wire terminals onone member, one of said members being recessed and the other memberv being pro-vided with a projection tending to enter said recess, Suid pro]e ction. and recess beiney so located that a Wire connected to one 'of said terminals is forced into n relatively sharp U-bend over said projection when seid members are united.

lAn electric device having a. body part provided with wire terminals and an incnsing shelltherefor, said body and shell having strain relief means for the wires leading to said wire terminals, comprising a projection on one part and a corresponding recess on the other part into which said proiection tends to enter whereby u wire engaged bejcmion, substantially as described.

, An electric device having a body part.

provided with terminals. a flange on said bodv i incasing thc sume, together with mean@` on' said shell and body part tending to interlock when the shell end body'parts are united :ind thus form the Wires leading to said terminals into a relatively sharp U-bend over said projection.

An electric device havingr a bodypart, with Wire terminals, a continuous raised Aflange onone end of said body parin com- 'tween said strain relief members 'is forced l' imo :i relatively sharp U-bend over the probination ivith a. .shell inenting the latter and means 1n connection with sind shell for .forcl ing the wires lending to said terminals into u sharp LLbend over said flange. 23

6. An electric devicehr'tving a body pert, with lwire terminals, a contlnnous raised flange onone end of said body part, a toss coperating with said flange to form a chann f nel. 1n combination wltha shell mcasmg 30 said boflyfpart and-means in connection with said shell for forcing down linto said channel the wires leading to said terminals whereby a sharp U-bend is formed thereon, substantially as described. 35

In testimony whereof -I'lmve signed my` name to this specification, in the presence of y i two subscribing Witnesses.

FRANK E. SEELEY. Witnesses: j f

H'. W. GoLnsBosoUGH,

L. B. WHEELlm'.

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