US940526A - Electric receptacle. - Google Patents

Description

G. W. GOODRIDGE.

ELECTRIGAL'REGEPTAGLE. APPLIOATION FILED MAY 6, 1909.

940.526. Patented Nov. 16, 1909.

WYTNE-SSES \N"ENTOR 4. WM WW 4% I A'TTO R N EYS GILBERT W. GOOIDRIDGE, BRIDGEPCRT, CONNECTICUT, ASSIGNOR TO THE BRYANT ELECTRIC COMPANY, BRIDGEPCRT,

NECTICUT.

CONNECTICUT, A CDRPORATION OF CON- ELECTRICAL RncEPTAcLE.

Specification of Letters Patent. Patented N 16, 19619,,

Application filed May 6, 1909. Serial No. 494,303.

To all whom it may concern:

Be it known that-l, GILBER'DV. Goonnmon, a citizen of the United States of America, and residing at Bridgeport, 1n the county of airfield and State of Connectiout, have invented a certain new and useful Improvement in Electrical Receptacles, of which the following is a specification.

My invention relates to electrical re'cepta-' cles and particularly to shell receptacles of the type commonly employed in incandescent lamp sockets, and screw plug receptacles of various sorts, such for instance connection blocks, fuse plug blocks and the like, my object being to improve the construction of such shells in the particular pointed out hereinafter.

In the accompanying drawings, Figure 1 is a broken section of a screw plug receptacle to the shell of which my invention hasbeen applied; Fig. 2 is a vertical sectionof ascrew shell showing my invention in anothenform; Fig. is a perspective view of said shell partially broken away to show a third .form; and'Fig. 4 is a section of portion of the shell showing a detail o f-cone struct-ion.

Itis customary to make the screw shells for plugreeeptacles, sockets, etc. of very thin metal wh ch may be drawn up in suit able diesto the desired shape, and then to punch out of the base an aperture for the admission of the center contact. This aperture usually extends across the base and partially up the sides of the shell, leaving the.- sides of the base as inwardly projecting flanges which are perforated to receive the screws by means of which the shell is fastened to its base. l'nasmuch as the shell is of quite thin metal however, the flanges thus formed are not strong and -it not infrequently happens,particularly in the-case of attacl'in'ient plug and fuse plug receptacles, that on the screwing in of the attachment or fuse plug, the screws are toin wholly or partially through these flanges and theushcll thereby loosened on the base. The strain on the flanges of the shell if the plug still rotated after its projectingcenter pontact has reached the center contact of the receptacle, will be readily understood. To obviate this defect I propose to make the screw shell with a reinforced securing flange. This may be accomplished in any suitable manner. Thus in Fig. l the flanges 6 on the shell 5 are shown. as substantially twice as heavy as the metal of-the'shell proper; this being accomplished by. using heavier sheet metal and drawing out to the desired thinness only that portion which forms the screw shell. proper. The same result may be more readily accomplished however, by usingthe customary thin metal and folding back upon the flange 2. suitable portion 7 of the base,

which isordinarily cut away as waste. This is shown in cross SQCiJlOIl' 1n- 1 1g. 2. \Vhile it is not necessary that this folded back portion cover the entire flange (3, a neatcr and more finished shell is produced when this is done, as shown in Fig. 3. In the latter are, the flange onthc left hand side is shown with the reinforcing base portion shaped thereto and rolled over in place, with the perforation 8 for the securing screw passing through both thicknesses of mctah The right hand'sidc of this figure shows the reinforcing base portion being rolled over 7 into place.

The partial section illustrated in Fig. 4 shows the customary offsetting of the metal adjacent the perforation for the securing screw 9 to receive the head of the latter.

Other ways of accomplishing the results above described may be readily devised and I do not limit myself 'to the precise struc-. tures shown but I claim as my invention.

1. A screw shell for an electrical receptacle having securing flanges, portions of said receptacle being bent over upon said flanges to reinforce the same for the purphse specified.

2. A screw shell for an electrical receptacle having-a base cutaway to form securing flanges, portions of said base being rolled over upon said flanges to reinforce the same for the purpose specified.

A screw shell for an electrical iete'ptacle having a base cut away to form securing flanges, portions of said base being shaped to and rolled over upon said flanges to reinforce the same for the purpose specified.

In testimony whereof 'I have signed my name to this specificatiomin the presence of two subscribing witnesses,

GILBERT V. GUODRIDGE;

Wit nesscs:

A. H. Jones, I I. W Gonnsnonowur.

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