US1210262A - Lamp-lock socket. - Google Patents

Description

R. B. BENJAMIN & J. I MBODEN. LAMPYLOCK SOCKET.

APPLICATION FILED APR. 3. 1914.

1,210,262. Patented Dec. 26,1916.

. UNI ED STATES ATENT OFFICE.

REUBENJBI BENJAMIN AND JAMES IIVIBODEN, OF CHICAGO, ILLINOIS, ASSIGNORS T0 BENJAMIN ELECTRIC MANUFACTURING COMP.A NY,*OF CHICAGO, ILLINOIS, A GOR- PORATIGN OF ILLINOIS.

LAMP-LOCK sooner.

Specification of Letters Patent. Patented Dec. 26, 1916.

Application filed A pri13, 1914. Serial No. 829,212.

Taall whom it may concern:

Be it known that We, REUBEN B. BENJA- MIN andJAMns IMBoiinN, both citizens of the United States, residing at Chicago, in the county of Cook and State of Illinois, have T jointly invented new and useful Improvements in Lamp-Lock Sockets, of which the following is a full, clear, concise, and exact description, reference being had to the accompanying drawing, forming a part of this specification.

Our invention relates to improvements in lamp sockets and one of the objects of our invention is. to provide locking means for a lamp socket which shall lock the lamp iii the socket in such a manner that the same will not jar loose duet'o vibration, etc., and also A to'so lock the lamp in that it-Ccannot be removed by'unauthorized persons.

For the purpose of disclosing our invention we have illustrated in the accompanying drawings one embodiment thereof, in .which I Figure l is a vertical. sectional view taken through the socket; Fig. 2 is a sectional view taken on the line '2-2 of Fig. 1; Fig. 3 is a. bottom plan view of the lamp socket; Fig. 4 is a perspective view of the locking plate for'lockingthe lamp in the socket; Fig. 5 is an elevation, partly in section, of the key F01; operating the locking plate; and Fig. (i is an end view of the key showing the shapedopening thereof.

The locking means is shown in connection with one form of socket, but it will be undcrstood that various other forms of socket may be used. acconipanying drawing comprises a collar 1 adapted to be secured. to a conduit or the like and having cxternalscrew threads for the reception of a bracket 2 which clamps a casing shade 3 in position upon the collar as shown. The bracket 2 carries a base consisting of an upper member -landa lower member 5, which parts are held togethorand are secured to the bracket by suitable screws (3 adapted to pass through the two base members and screw into the bracket 2. The upper base member carries. on its lower sur face, a center contact 7 and a pair of binding tern'iipals 8 and 9 to which the leadingin wires are adapted to be attached. The lo\ver\member is formed with a central aperture 10 in which is contained a threaded The socket disclosed in the sleeve 11 which forms the outer lamp-ter- 1ninal-engaging contact] The sleeve is se-' cured to the member 5 by means of suitable screws 12 which pass therethrough and which engage in the locking member 13. The threaded sleeve 11 is provided with a contact member H which makes connection between a pair of spring fingers l5- electrically'connected with the binding terminal 8. Mounted within the recess 16 in the top of the member 5 is a locking plate 13 which.

lies within the recess 16 and preferably takes the form of an elongated ring having,

on its inner 'ieripherv, downwardly extend- .nig spurs 17. The ring is elongated so that 11 and the downwardly extending spurs project downward within the threaded shell;

the spurs preferabl being in the form of teeth having their straight sides in a direc tion to engage the lamp when it is rotated to remove the same from the socket. This plate is held in position by the threaded screws 12, and is drawn down in clamping and locking position by these sore-vs. These screws, at their lower ends, have triangular shaped heads 19 and are countersunk in the recess 20 so that they are not easily accessi'-. ble, especially when the lampis in position and when the shade 3 is mounted on the socket. in operation. the screws 12 are loosened,

thereby loosening the clamping plate. The

lamp is screwed into position .in the usual manner and asthc top of its threaded shell engages the spurs, due to the fact that the spurs slope on one side, the plate willbe forced upward, it not being held in clamp- ,ing position by the screws 12. After Ehe I lamp has been screwed in so that its center contact may form engagement with the center contact of the socket, the screws 12 are tightened, thereby drawing the looking plate 13 down and forcing the endsof the spurs into the top of the threadedshell on the lamp. Due to the fact that the straighty ened side of the spurs 15 in such relation that a backward movement or. a movement of the lamp to remove the same causes the spursto bite intothe threaded shell, it is impossible to remove the lamp until the locking plate has been loosened.

For the purpose of operatingthe screws 12 with the lamp in position and with the shade in position, I provide a, key which comprises an insulating handle 20 having secured thereto a flexible portion '21, which, at its outer end carries a socket 22, triangular in shape to receive the ends 19 of the screws 12. This key is suiliciently long to extend up ,on the side of the lamp and betweenthe lamp and the shade. the flexible portion 21 permitting the key to be bent around the lamp in event the lamp is so large that there is not a great deal of space left between the sides of the lamp and the shade.

Having thus described our invention what we claim as new and desire to secure by Letters. Patent is 1. In a lamp lock for sockets, the combination with a lamp socket, of a movable spur-carrying member in the inner part of Said socket having a plurality of outwardly extending spurs, on opposite sides of the axis of said socket and means operable from the exterior of the socket to move said member outward to force said spurs into the base of said lamp and liold the spur in locking mounted in the inncnpart of the socket having a central opening to permit the center contact of the lamp to project them-through and engage the center contact of the socket, an outwardly extending spur on said member, and means operable from the exterior of the socket only by a specially formed key for operating said member to force the spur into engagement with the base of the lamp.

4. In a lamp lock. the combination with a lamp socket, of a'"1norable spur-em'rying member in the inner part of said socket,

having 'an outwardly 'extending spur, and

means operable from the outer side of the socket for moving said member to force said spur into the base of the lamp and hold said spur in looking position. I

5. In a lamp lock,'the combination with a lamp socket, of a spur-carrying member mounted in the inner part of said socket having an outwardly extending spur, a shade secured over said socket, means operable from the outer side of the socket for an insulating base, of a center contact and threaded shell contact mounted in said base, a spur-carrying plate mounted in said base above said threaded shell contact, and screws extending through said base from the outer part thereof engaging said plate, and adapted to operate said plate to forcerthe spur thereof into locking engagement with the lamp base. I

T. In a lamp lock, the combination with an insulating base having a threaded shell and center contact, of a spur-carrying plate mounted in said base farther in than said threaded shell and having a center opening to permit the center contact of the lamp. to engage the center contact of the socket, countersunk screws extending through the base from the outer side for engaging said spurcarrying plate, and adapted to operate the same to force the spur into engagement with the base, said screws havingspecially formed heads to be engaged bya specially formed operating instrument.

8. In a lamp lock, the combination with a lamp socket, of a movable spur-carrying member in the inner part of said socket having an outwardly extending spur, and means operable from the outer side of the socket for moving said member to force said spur into the base of the lamp and hold said spur in locking positiomsaid means including a screw located at one side of the axis of said socket. I

In witness whereof, we have hereunto subscribed our names in the presence of two witnesses. REUBEN B.'B ENJAMIN.

JAMES IMBODEN. \Vitnesses I-I. Mormon HUMAsoN, E. R. KING.

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