US1404731A - Electrical receptacle - Google Patents

Description

R. B. BENJAMIN.

ELECTRICAL RECEPTACLE.

APPLICATION FILED OCT. 9. 1911.

1,404,731 Patented Jan. 31, 1922.

- M0va-w MM (3 WW UNITED STATES PATENT OFFICE.

REUBEN B. BENJAMIN, OF CHICAGO, ILLINOIS, ASSIGNOB '1'0 BENJ ELECTRIC MANUFACTURING COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLI- nnnornrcan nncnrraom.

Patented Jan. 31, 1922.

Application filed October 9, 1917. Serial No. 185,534.

To all whom it may concern: 7

Be it known that I, REUBEN B. BENJAMIN, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented new and useful Improvements in Electrical Receptacles, of which the following is a full, clear, concise, and exact description, reference being had to the accompanying drawing, forming a part of this specificatlon.

My invention relates to electrical receptacles.

One of the objects of my invention is to provide an electrical receptacle which shall be simple in construction, easy and cheap to manufacture, easy to wire, and durable and eficient in use. Further objects will appear from the detailed description to follow and from the a pended claims.

In the d i'awings, in which two embodiments of my invention are shown- Fig. 1 is an axial section on the line 11 of Fig. 2, showing an electrical receptacle embodying my invention;

Fig. 2 is a transverse section on the line 2-2 of Fig. 1;

Fig. 3 is a bottom-plan view of Fig. 1;

Fig. 4 is a section on the line 4-4 of' Fig. 2;

ig. 5 is a section on the line 5--5 of Fig. 2; and

Fig. 6 is an axial section of an electrical receptacle showing another form of my invention.

Referring now to the drawings in detail, and first to the form shown in Figs. 1 to 5, inclusive; the receptacle shown comprises an insulating base 10 recessed in its outer faceto receive the threaded shell contacts 11 and the center contact 12, and recessed on its inner face to receive the binding- terminals 13 and 14, respectively, a sheet-metal cap 15 having a screw-threaded portion 16 threaded over the correspondingly-threaded inner end of the base 10, and a metal bushing 17 internally screw-threaded at 18 to be screwed onto an externally-threaded nipple. A suitable insulating washer 19 may be placed inside the cap 15 between the nipple 16 and the base 10 to prevent the feed-wires from coming in contact with the bushing 17. The cap 15 is freely rotatable with respect to the bushing 17, and is held in place thereon by means of a washer-like member 20, which the bushing 17, the lower edge of the bushmg 17 being headed over the edge of the member 20, as indicated at 21. The insulatmg base 10 is held from rotation with respect to the bushing 17 by means of lugs 22 formed Integral with the washer member 20 and extending into recesses 23 in the upper face of the insulatin base 10, the washer 19 being provided with apertures through which the lugs 22 extend.

The contacts 11 and 12 may be connected wlth the binding- terminals 13 and 14, respectively, by means of screws 24 and 25, respectlvely. The insulating base 10 may be provided with an annular groove 26 to provide means for attaching a shade or a shadeholder. The shell contact 11 may be secured to the base 10 by means of a pair of eyelets 27 extending through registering openings in the flange of the shell 11 and in the insulating base 10 (Fig. 5).

In wiring the receptacle, the base 10 is unscrewed from the cap 15, the bushing 17 is screwed onto the end of the externally screw-threaded nipple, and the ends of the lead-wires are secured to the binding- terminals 13 and 14. The cap 15 .is then screwed down onto the insulating base 10, the swivel connection between the cap 15 and the bushing 17 permittin the connection to be made without twistlng the feedwires.

The non-rotatable connection between the bushing 17 and the insulating base 10, accomplished by means of the lugs 22 extending into the recesses 23, prevents the rotation of the insulating base 10 when a lamp-base is being screwed into or out of the receptacle.

In the form of my invention shown in Fig, 6, the parts may be the same as in the form just described with this exception: that a bushing 28 of insulating material is substituted for. the metallic bushing 17 In this form of my invention, which is used with a pendant socket, the bushing 28 co-operates with an abutment 29 on the base 10 to grip the conductors 30 and take the strain off the binding terminals 13 and 14. In this form of my invention it is not necessary to provide means for preventing relative rotation between the bushing 28 and the insulating base 10, as the base 10 will be grasped in one hand when the lamp is being screwed into place in the receptacle.

55 may be of. sheet-metal, firm y secured to In wiring the device, the cap 15 is unno screwed from the base 10, the conductors are connected to the binding- terminals 13 and 14, respective] and the cap 15 is then screwed down on t e. base 10.

I claim as new and desire to secure by Letters Patent:

1. An electrical receptacle comprising an insulating base having a recess therein, shell and center contacts supported in said recess, binding-terminals supported by said base, a tubular bushing providing a assage for conductors to said binding-terminals, and a cap having a swivel connection with said bushing and a detachable connection with said base and supporting said base from said 2 An electrical receptacle comprising an insulating base having a recess therein, shell and center contacts supported in said recess, binding-terminals supported by said base, a tubular bushing provl ing a passa for conductors to said binding-termina s, and a ca having a swivel connection with said bushing, the upper end of said base bei externally screw-threaded, and said cap aving a rtion threaded over said externallythrea ed portion.

3. An electrical receptacle comprising an insulatin base having a recess therein shell an center wntacts supported in said recess, binding-terminals supported by said base, a tubular bushin providing a passage for conductors to sai binding-termlnals, a cap having a swivel connection with said bushing and a detachable connection with said base and sup orting said base from said cap, and means or preventing relative rotation between said bushing and base.

4. An electrical receptacle comprising an insulating base having a recess therein, shell and center contacts supported in said recess, bindin -terminals supported by said base, a tubu ar b'ushin roviding a passage for conductors to said binding-terminals, a cap having a swivel connection with said bushing and a detachable connection with said base, said base having a recess therein, and a member non-rotatably secured to said bushing and extending into said recess to prevent relative rotation between said base and bushing.

In witness whereof, I have hereunto subscribed my name.

REUBEN B. BENJAMIN.

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