US1210087A - Adjustable support for electric lamps. - Google Patents

Description

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Patented Dec. 26, 1916.

- K. F. M. LINDBLAD. ADJUSTABLE SUPPORT FOR ELECTRIC LAMPS.

IAPPLIICATION HLED FEB. 26. 1916.

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KIN UT F. M. 'LINDBLAD, 0F EVERETT, MASSACHUSETTS.

Application filed February 26, 1916. Serial No. 80,721.

To all whom it may 00mm;

Be it known that I, KNUT F. M. LIND- BLAD, a citizen of the United States, residing at Everett, in the county of Middlesex and State of Massachusetts, have invented new and useful Improvements in Adjustable Supports for Electric Lamps, of which the following is a specification.

This invention relates to an adjustable pendant for electric light lamps.

The object of the invention is to provide apendant which is cheap, durable and neat in appearance and which can be madeof any desired length and can be set at any desired angle and when so set will remain firmly positioned.

The invention consists in the combination and arrangement of parts set forth in the following specification and particularly pointed out in the claims.

Referring to the drawings: Figure 1 is a side elevation of an electric light pendant constructed in accordance with my invention illustrating the same as attached to the ceiling. Fig. 2 is a side elevation of the same with a portion thereof shown in dotted lines in an adjusted position, both Figs. 1 and Qbeing broken away to save space in the drawings. Fig. 3 is a sectional elevation taken on line 33 of Fig. 1. Fig. 4 is a sec- 'tional plan taken on line 44 of Fig. 2.

Fig. 5 isa plan view of one of the spring washers.

Like numerals refer to like parts throughout the several views of the drawings.

In the drawings, 5, 6, 7 8 and 9 are links forming an adjustable support. Said links are all of them formed of hollow rectangular tubes as illustrated'in Fig. 4. The terminal link 5 has a screw-threaded sleeve 10 fast to its upper end to which is fastened the supporting bracket 11. 9 has a screw-threaded sleeve 12 fast to its lower end to which is attached the lamp socket 13. The intermediate links 6, 7 and 8 are duplicates of each other. The links 6, 7 and 8 eachterminates at its opposite ends in a pair of ears 14, Hand 15, 15. Said ears 14 lie in planes substantially at right angles to the cars 15. Said ears are joined together by pivots 16 which rotatably connect the ears of adjacent links together. The ears 14 are offset at 17 (see Fig. 3) out of alinement with the cars 15 on the adjacent end of the link adjacent thereto, the outer Specification ofLetters Patent.

The terminal link for the lamp,

ADJ USTABLE SUPPORT FOR E LECTRIC LAMPS.

Patented Dec. 2a, 1916.

surface ofthev ears 15 being flush with the outer surface of the links 6 and 7.

Each of the pivots 16 consists of a head 18 and a shank, the portion 19 of said shank adjacent to the head 18 being cylindrical, while the remainder of said shank is flatted off preferably to form a square portion 20,

I said squareportion fitting in a corresponding hole 21 eted at 22.

The ears 15 are in the ear 15 to which it is rivpreferably provided with ticular portion of the ear 15 the hole 21 is provided. The ear 14 is rotatably mounted upon the cylindrical portion 19 of the pivot 16 and interposed between the ear 14 and the head 18 is a split spring washer 24 which presses against the inside of the head 18 on one side thereof and against the inside of the ear 14 on the opposite side thereof tending to force the ear 14 against the ear 15 to produce a frictional resistance to the rotation of the ear 14 relatively to the ear 15 and consequently presenting a frictional re sistance to the rotation of one of said links upon another.

The terminal link 5 is like the intermediate link 6 in so far as the ears 14 are 0011" cerned and the terminal link 9 is the same as the link 8 in so far as the cars 15 are concerned, but at the upper end of the link 5 and at the lower end of the link 9 no ears are provided. The said ends of the links 5 and 9, as hereinbefore set forth, are provided with means for attaching the supporting bracket 11 and the lamp socket 13.

The electric wires leading to the lamp socket 13 extend through the interior of the tubular links forming the support and project out through the supporting bracket 11.

In use the device may be supported from a bracket fixed to the ceiling or to the wall or to any suitable stationary support. When it is desired to adjust the lamp to different positions, the links are rocked one upon the other to bring the lamp to the required position, as illustrated in Fig. 2 wherein the link 9 has been rotated upon the pivot which connects it to the link 8 and the link 7 has been rotated upon the pivot which connects it, in turn, the the link 6, and in this manner the support may be adjusted to different angles and to different positions in different planes, thus obtaining any desired position and when this position has a hemispherical projection 23 in which par- I been obtained the lamp Will stay in that position, due to the frictional resistance against relative movement of the different links as hereinbefore described.

I claim:

1. An adjustable support for electric lamps having, in combination, a plurality of tub-ular links, each link terminating at its opposite ends in a pair of ears and pivots connecting said ears together, said pivots each consisting of a head and a shank, said shank being cylindrical adjacent to said head and flat at its end, said fiat end projecting through a corresponding hole in one ear of said pair of cars and being secured thereto, the other ear of said pair of cars being rotatably mounted on sa1d cylindrical portion of said shank and a spring Washer on sa1d shank and bearlng against one of sa1d ears.

2. An adjustable support for electric lamps Copies of this patent may be obtained for five cents each, by addressing the having, in combination, a plurality of tubular links, each link terminating at its opposite ends in a pair of cars and pivots connecting said ears together, said pivots each consisting of a head and a shank, said shank being cylindrical adjacent to said head and flat at its end, said fiat end projecting througha corresponding hole in one ear or said pair of ears and being riveted thereto, the other ear of said pair of ears being rotatably mounted on said cylindrical portion of said shank and a spring Washer interposed between said head and said last named car.

In testimony whereof I have hereunto set my hand in presence of two subscribing Witnesses.

KNUT F. M. LINDBLAD.

Witnesses:

CHARLES S. GooDINe, SYDNEY E. TAFT.

Commissioner of Patents,

Washington, D. G.

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