US973199A - Cluster-socket. - Google Patents

Description

D HOLDEN. CLUSTER SOCKET. Arl moA-nox map n. 16. mos.

973,199. Patentd ecu-1s, 1910.

3] vwe when UNITED STATES PATENT, OFFICE.

DELOS HOLDEN, OF UPPER MONTCLAIR, NEW JERSEY, ASSIGNOR TO JOHN H. DALE OF NEW YORK, N. Y.

I CLUSTER-SOCKET.

To all whom it may concern:

Be it known that I, Danos flowers, a citizen of the United States, residing at Upper Montclair, in the county of Essex and State of New Je1;sey,.have invented certain new and useful Improvements in Cluster-Sockets, of which the following is a full, clear, and exact description.

My invention relates to electric light fix-,

I known as wireless clusters or cluster sockshowin 1't0 whic are secured; Fig. 4 is a detail view of one form of threaded s ets, as distinguished from wired fixtures or clusters. In prior clusters it has been common to mount the threaded shells of the lamp sockets upon a conducting plate, said late servingto rigidly secure the said she] s to.- gether and to supply current thereto.

Myinvention has for its object the elimination of a plate. of this character, the threaded shells being secured directly to one or more insulators which are in turn secured to a rigid central conducting base which is electrically connected to the center contacts of the lamp sockets.

I The threaded shells being thus mechanically united, current may be su plied thereto by fiexible .conductors brouglit to a common point to whichthe'line wire may be connected. The insulation in.

this structure is preferably although not necessarily reduced to small separate elements interposed between the shells and central conductor.

' In order, that the invention may be more fully un'derstood,'reference is made to the accompanying drawing, of which Figure 1 is a plan view of a cluster constructed in accordance with my invention,

the top plate being removed to expose the interior of the cluster; Fi 2 is a section on line 9r 2 of Fig. 1 showing the top plate in. position; Fig. 3 'is a perspective View the rigid central conducting base the'insulators and threaded shells 'erspective ell which Specification of Letters Patent. Iiatented Oct, 18 1910, Application filed March 16, 1908. Serial No. 421,568. I

may be used; and Fig. 5 is a similar view of one of the disks or buttons for insulatihg the threaded shell from the central base.

In the cluster shown, the'central conducting base is in the form of a rigid ring 1 of circular cross-section, said ring eing preferably of brass or other metal. This ring is drilled and tap ed as shown at 2 to receive the screws 3, 0 which there is one for each lamp socket, and which are of metal, and act as the center contacts for the lamp sockets, and also as means for securing the threaded shells in position. Upon each of the screws 3, and 'secured by the head thereof, is a washer 7 preferably of brass, a disk 6 of mica or other insulating'materiahan in- 'sulating disk or button 4, which may be of porcelain or other suitable material, and aand 4, and the washer 7 is of greater diameter than the space between the said flanges.

' The parts being thus. assembled upon the screw 3, the latter is inserted within the bore 2 and screwed firmly into position,

thereby rigidly fastening together the various parts which have been described and forming the structure shown in Fig. 3.

Any suitable means may be rovided for electrically connectin the cluster shown, t e flexible tongues 8 are brought together at a central point and united by a metallic bushing 10., the ends of which are upset so as to bind the tongues tightly together, and the bore of the'bushmg is tapped to receive a-binding screw.11,

for securing one of the line wlres which enters the cluster through the conduit-or pipe 12. A binding screw 13 is threaded in the ring 1 for receiving the other line wire for supplying current to the center contacts of thesookets. 1

Any desired means-may be employed for the she ls 5, but ,in'

supporting the unitary structure shown in Fig. 3, but I prefer to support the same by means of a cover removably applied to the top plate 17 said cover being shown as a hemisphericalshell 14, preferabl of brass, and

provided with-a pluralityo pins 15, which 1 engage slots 16, formed in the depending flange of the top plate 17, and form ayonet I joints which permit the ready removal of the cover mm the to plate. Insulating bushings 18 of porcelain or other sultable material are threaded upon the, exterior of the shells 5, and theffianges formed on said bushings bear against the edges of the openings in the cover 14 and draw the cover andthreaded shells into a rigid structure.

In carr'yingout my invention it is not necessary that the'threaded shells be united to the mug 1 by engagement of a washer 7 with flanges 9, since the shell may be secured to the insulating disk i by any other means,'

as, for instance by screws or bolts passing through the flanges 9 and the disks 4.

Having now described my invention, what;

V I claim, 1s:

1. In a cluster socket, the combination of a rigid metallic base, and a plurality of insulating blocks, threaded shells and center,

contacts carried thereby, the center contact for each shell being in' electrical connection with saidbaser Y 2.111 a cluster socket, the combination witli-a-horizontal, rigid, metallicbase, of a plurality. of. insulating blocks having, inclinedouter-faces, threaded shells upon said.

inclined surfaces, and center contacts, all carried bvsaid base, the center contacts for with said ring.

each shell being in electrical connection with said base.

' '3.' In a cluster socket, the combination of .a rigid metallic base, a

lurality of insulating blocks and threade shells, and center bolts for clamping said members together, said bolts being electrically connected to the base and formmg the center contacts of the lamp sockets.

t. In a cluster socket, the combination'of a rigid metallic ring, anda pluralit of in-- sulating blocks, threaded shells an 40 center contacts carried thereby, the center contact for each shell being in electrical connection 5. Inc cluster socket, the

' blocks and threaded shells, and center -bo ts for clamping said-members together,

'ture, in the presence said bolts being electrically connected .to the ring and forming the center contacts of the lamp sockets.

4 of two' witnesses DELOS HOLDEN.

Witnesses:

FRANK S. Oman,

combination of a-rlgld metallic mg, a plurality of insulab-x In witness whereofi'l'subscribe'my signa-

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