US964619A - Attachment-plug. - Google Patents

Description

J. G. DALLAM. ATTAGHMENT PLUG.

, APPLICATION FILED 1111.11, 1905.

Witnesses Invento'r:

UNITED STATES PATENT OFFICE. J

JOHN C. DALLAM, 0F SCHENECTADY, NEW YORK ASSIGNOR TO STANLEY ELECTRIC. MANUFACTURING COMPANY, OF PITTSFIELD, MASSACHUSETTS, A CORPORATIQN on NEW JERSEY.

ATTACHMENT-PLUG.

Specification of Letters Patent.

Patented July 19, 1910.

To all whom it may concern:

Be it known that I, JOHN C. DALLAM, .a citizen of the United States, residing at Schenectady, colunty of Schenectady, State of New York, have invented certain new and useful Improvements in Attachment-Plugs, of which the following is a specification.

The present invention relates to connectors for electric conductors, and more particularly to attachment plugs designed for use in connecting the feed wires of small elec-' trical apparatus such as fan motors, heaters, portable lamps, etc., to a service circluit by the mere insertion of the plug into the socket or receptacle of the ordlnary incandescent lamp. a

The object of the invention is to provide a simple, compact and highly efficient device of this character which may be readily separated so that the part carrying the contacts for engagement with the contacts of the socket or receptacle may be independently rotated into or out of operative position, and the other member to which the feed wires are attached connected thereto without twisting or untwisting of the feed Wires and, moreover, to afford an easily severable joint whereby the application of tensile strains to the feed wires will merely cause a separation of the parts and protect the socket or receptacle and its support from injury.

In carrying out my invention I provide an insulating base section and a separable wire engaging section. The former section is provided at one end with metallic contacts adapted to connect with the contacts of a socket or receptacle and electrically connected to metallic jaws or clips at the opposite end for detachably engaging project-ions on the separable wire. engaging section. The latter section has an insulating -disk, upon one side of which are mounted the engaging projections, and upon the other side are mounted suitable binding posts and cut-ou'tdevices, and surrounding the edge of the disk, the binding posts and cut-o\ut devices, is a suitable protecting cap.

For a more complete understanding of the invention reference may be made to the following detailed description and the accompanying drawing forming a part of this specification in which,

Figure 1 is a vertical section of a separable attaching plug embodying one form of my invention; Fig. 2 is a plan View of the which a rod or screw 6 extends upwardly I axially of the base.

The upper portion of the base section 1 is provided with two recesses 7 and 8. The larger recess Z extending from near the periphery to the opposite side of the axis receives an angular clip or jaw 9 having its transversely-disposed arm 10 apertured and threaded for engagement with the upper end of the axial screw 6, while the longitudinal arm 11 is provided with a reverse curve to afiord a grip for a corresponding part on the separable section. The smaller recess 8 is separated from the larger recess 7 by a septum 12, and at the bottom thereof is an aperture '13 through which extends a straight shanked spring clip or jaw 14 which is connected at its lower end to the lower 4 edge of the screw shell by solder or othersuitable means. The upper end 15 of the clip or jaw 14 is providedwith a reverse curve siinilar to that in clip or jaw 9, but

oppositely disposed. The screw shell 4 and the clip or jaw 14 carried thereby are held in position on the base by a screw 16 extending longitudinally through the upper base portion and engaging a suitable lug (not shown) on the upper edge of the screw shell.

The separable section 17 has an insulating disk 18 of-fiber or other tough insulating material with metallic projections or fingers 19 secured to the lower surface thereof for" The disk 18 is provided near .its periphery with a fifth screw 24 which serves as a binding screw for one of the feed wires 25 and an end of a fuse 26. The opposite end of the fuse maybe connected to either of the binding screws 23 or 23, While the second feed wire 25 is connected to the other.

The protecting cap 27 is of sheet vmetal made hemispherlcal in shape similar to the caps of the .ordinary lamp sockets, ,and is connected to the insulating disk 18 by radial screws28 extending through the lower sides of the cap 27 and engaging tapped holes in 1 the disk. By securing thedisk 18 slightly or jaws.

above the lower edge of the cap, as shown in Fig. 1, the latter is adapted to serve as a guard flange 29 for the joint between the two sections of the plug.

I do not desire to restrict myself to the particular form of construction of parts herein described and shown, since it is apparent that they may be changed and modified without departing from my invention.

What I claim asnew and desire to secure by Letters Patent of-the United States, is,-

1. A separable electric connector comprising'a one-piece base of insulating material provided at one end with recesses, contact clips' or jaws located in said recesses, and center and side contacts at the other end of the base electrically connected to said clips 2. A separable electric comiector comprising a one-piece base of insulating material provided at one end with recesses, contact clips or'jaws located in said recesses, a shell contact surrounding the other end of said base and connected to one of said clips or jaws, and a center contact connected to the other clip or jaw.

3. A separable electric connector compris ing a one-piece base of insulating material provided in the upper end with recesses, contact clips or jaws located in said recesses with their outer ends below the end surface of the base, a shell contact mounted upon andsurrounding the lower end of said base and connected to o of said clips or jaws, and a center contact electrically connected to the other clip or jaw. i

[4. A separable attaching plug comprising an insulating base part having integral cylindrical end portions of different diameters,

metal contacts mounted on the smaller end portion, recesses formed in the opposite end,

an angular jaw of flat metal arranged in one of said recesses and connected to one of the end, one of which is connected to theside contact, a conductor extending from the center contact axially through the base, and a radial connector attached thereto and connected to the second cont-act clip.

In witness whereof, I have hereunto set my hand this 9th day of January, 1905.

JOHN C. DALLAM.

Witnesses BENJAMIN B. HULL, HELEN ORroRD'.

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