US743991A - Electric fixture. - Google Patents

Description

PATENTBD NOV. 10, 1903.V v

K. samen. ELECTRIC FIXTURE.v APLIOATION IILH)A JULY 12, 1902.

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N0.743,991. PATBNTED Nov. 1o, 1903.

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UNITED STATESA Patented November 1o, 190s.

vPATENT OFFICE.

KENT sHArEER, or EvANsToN, ILLINOIS.

ELECTRIC FIXTURE.

SEECIFICATION formingpart of Letters Patent No. 743,991, dated November 10, 1903. 'Applikation site July 12, i902. serai No. 115,293. (No man.)

To @ZZ whom t may concern: f

Be it known thatI, KENT SHAFFER, a citizen of the United States,residing at Evanston, in the county of Cook and Stateof Illinois,have invented a certain new and useful Improvementin Electric Fixtures, of which the following is a full, clear, concise, and exact description, reference being had t0 the accom panying drawings, forming a part ofthis specication.

My invention relates to electric fixtures, and serves to provide an improved form of cluster or group connection for translating devices-such, for example, as incandescent electric lamps. lVhere fixtures of the Edison type are employed, the sockets of a cluster or group are supported upon a bracket or rod xedly secured to the wall or ceiling, it being impracticable to remove the cluster or group of sockets without disarranging the entire lixture.

By means of my invention I am enabled to separably associate a group or cluster of sockets with a socket projecting from vthe wall or ceiling, thereby replacing those clusters of sockets that have proved so faulty in actual practice, because of their mechanical imperfections. The invention, moreover, permits a ready change in the character of the electric ixtnre associated with the socket, as one form of `fixture may be readily removed and another inserted in place thereof. In this way one incandescent lamp may be employed in association with the ceiling or wall socket or any number within reasonable limits may be associated with such socket.

My invention in its preferred embodiment comprises a group or cluster of sockets provided with two terminals common to all of the Figure l is a perspective view of the pre-` Vfperred embodiment of my invention, incandescent lamps vbeing shown in place Within the sockets of the structure. Fig. 2 is a secand plug on line 2 2 of Fig. Fig. 3 is a View of the base of the plug constituting an element of the invention.

' Like parts are indicated by similar characters of reference throughout the diderent ligures.

Asupport a, made,preferably,of some suitableinsulating material, as porcelain, is common to the sockets b b and the plug c. I have shown but two sockets; but the number may be increased without departing from the spirit of the invention. This base portion et supports terminals, preferably in the form of screws d and e. The terminal CZ, for example, is broughtinto electrical connection with the threaded sleeve f of the plug c, while the terminal screw c is brought into electrical connection with the central plug-terminal g. The terminals fand g of the plug are designed for engagement, respectively, with the threadcd-sleeve h of a wall or ceiling socket 1l and the central terminal k of the said wall or ceiling socket. Theconnectionbetweentheterminals g and e is preferably completed through astem Z, a fuse m, and a plate n, while connections between the terminals d and f will be established witha front plate o, a screw p, and a -plate q. The sockets are preferably provided With a common means for separably attaching the same to the base a, the means being preferably in the I'orm oi' a clip-flange or spring-clip rr, engaging corresponding recessed portions in the base. The clip fr preferably forms an integral part of a casing r, that is preferably metal, which casing is bifurcated to provide two sleeves within which shells of insulating material s, as rubber, may be` disposed, these shells of insulating material being capped by top walls t, also made of insulating material, as porcelain. There is contained in each rubber sleeve s a threaded sleeve u, constituting a socket-terminal. There projects into each sleeve-terminal u a central terminal o, that is directly supported by the cap-plate t. Conductors o connect the threaded terminal u, with the -terminals q, as illustrated, while the conductors w connect the terminals fu with the tertional View through the axes of the sockets ICO minal e. Sciews x, passing through the capplates t, serve to connect the .conductors 1 2 With the threaded sleeve-terminals u, While screws y correspondingly effect connection of the conductors zu With the terminals fu.. The terminals ot' the sockets are thus connected in parallel with the terminals of the common plug, while protection is lent to the composite structure by means of the single fuse m. The organization thus described is adapted to supply current toa plurality of translating devices, as/the lamps z z, from a common Wall or ceiling socket, as t'. These lamps are provided with terminal plugs. Plugs for conducting supply-current to translating devices other than lamps may obviously be inserted Within the same sockets.

It is obvious that changes may be made in the device of my invention shown Without departing from the spirit of the invention, and I do not, therefore, Wish to be limited to the precise structure set forth; but,

Having thus described my invention, I claim as new and desire to secure by Letters Patent- In an electric fixture, the combination with a plug, having one terminal in the form of a threaded sleeveand a second central terminal, of a plurality of sockets, each provided with a terminal iu the form of a threaded sleeve and a second central terminal, the said plug and sockets being mechanically united, two terminals common to the terminals of the plug and to the terminals of the sockets, conductors connecting the terminals of the sockets in parallel, and a base interposed between the plug and the sockets carrying the said two terminals, substantially as described.

ln Witness whereof I hereunto subscribe my name this 1st day of July, A. D. 1902.

KENT SHAFFER. Witnesses:

GEORGE LQCRAGG, HARVEY L. HANsoN.

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