US933132A - Electric-light fixture. - Google Patents

Description

T. SMITH.

ELECTRIC LIGHT FIXTURE.

APPLICATION FILED norm, 1904.

Patented Sept. 7, 1909. I

asses v l W LII UNITED STA- TES PATENT onirica.

THEODORE SMITH?,- F CHICKGD', ILLINOIS, ASSIGNB) '12.0 THEO'. SMITH MANUFAC- TUBING COMPANY, 0F CHICAGO, ILLINOIS, A GORPOBATION 0F ILLINOIS.

ELECTRICLLIGHT FIXTURE.

Specification of Letters Patent.

yPatented Sept. 7, 1909;

, cago, in the county of `Coolr and State of Illinois, have invented a' certain new 'and useful Improvement in Electric-Light Fixtures, of which the following' is a specification.

My invention relates to electric light fixtures, and has for its obj-ect to provide` a new and improved device of this description.-

My invention is illustrated in the accompanying drawings, wherein- Figure l is' al side elevation of one form of .v the fixture; Fig. 2 is a view showing the end of the member carrying the lamp and is connected; Fig. 3 is a sectional view through a portion of the member carrying the lamp; Fig.l e is a sectional view takenon line 4-4 of Fig. 5; F ig. 5 is a sectional-y .view'talen on line 5 5 of Fig. l.

Lilie' letters refer to-like parts throughoutthe several figures.

The particular device herein show-n is adapted to be mountedI upon a base, A, al

though it is, of course, evident that it could be attached to any support. This base is provided with a hollowcylindrical part, B, provided at its end with a sleeve, D, said sleeve being providedI with a bushing, E. Slidably mounted in the cylindrical part B is a tube, F, which is held in any desired position by the screw G. The sleeve D is provided with a slot, d, through which the screw Gr passes, the screw being loose in said slot so that the tube F and the parts asso- 'ciated therewith may be rotated after the screw is tightened. This slot extends preferably about half way around the sleeve so as to give a rotary motion of 18()o to the tube F. This screw holds tliebushing E in place as,it passes therethrough, and at the same time when tightened holds the tube F from longitudinal movement, but permits rotary movement thereof, the screw at the saine time limiting the rotary movement by striking the edges of the slot d. The tube F is provided at its end with an engaging piece, F1, having sides, f. A tube H is associated with the tube F, and is provided with a through whichI the electrical conductor can be passed. 4The part F1 is provided with projecting lugs f1 to which is pivotally connected a rod I adapted to be clampedv be'- tween its ends to the tube H' in any suitable 60 manner', as by meansl of the part H2 and the screw 1v1' and' clamping piece 71,2. This clampingd'evice is tightened up so as to produce enough friction to hol'd the part H of the jointe-d arml in any position to which it may 55 be' moved', although said arm can be moved toI various positions by applying pressure thereto, the rod" sliding in the clamping device under such conditions. The end 'of this rod isl free, as shown. The lampl socket is connected 'with' the tube H by means of a joint which permits the tube to be moved to various positions. The socket has connected thereto a part, K, whichy passesbetween the arr'ns of a= bifurcated end piece, J, attachedl 75 to the tube A thumb screw la passes through the parts', and is adapted when tightened to vhold the lamp socket in any desired position. 'The conductor C for the light passes up through the cylindrical part 8o B and the tubes F and H, so as to be concealed therein and' protected4 thereby. It will' be seen that by this construction there are various adjustable parts which permit the lampy to be moved to various positions. S5 The limit-ation on the rota'tfionl of the lamp supporting'pa'rft` prevents the conductors from becoming too greatly twisted. It willthus be seen that a very great range if movement is secured by these various parts, and that this movement is obtained without danger of injuring the conductor. By having the rod I with its end free, such free end can move as the rod is slid in theclamping device so as to relieve the rod of the lateral strain. If, for example, the rod was connected at its end to some part, there would be a lateral or bending strain produced when the rod was slid, and the rod bent out of alinement. This is obviated by leaving the end free, as shown.

I have shown a particular construction wherein the supporting part, comprising the tubes F and H, is curved and of a particular "construction, but it is, of course, evident that the end of the rod I beyond the part H:2 is in free, this movement can take place, there being suflicient spring in the rod to permlt it. It is not necessary to have play of the rod in the projection Il, for said rod `tits tightly in said projection in order to hold the parts in any position to which they are moved.

I claim:

l. A fixture comprising a lamp socket, two

i. curved supporting parts therefor' pivoted together end to end, a rod pivoted to one part and frictionally clamped to the other part so as to hold said parts in position to torni a continuous curve.

2. A iixture comprising a lamp socket, a tube to which it is connected, a supporting part to which said tube is pivotally connected, a rod having two points of attachment, one a pivotal connection to said supporting part and the other a frictional connection to said tube, said rod having its projecting end free so as to adjust itself to the various relative positions of the tube and the supporting part.

3. A fixture comprising a lamp socket, a hollow tube to which it is connected, a support to which said tube is pivotally attached, a conductor contained wlthin said tube, a rod pivotally connected to said support and extending in proximity to said tube, a projection on sai tube provided with a clamping part throu h which the end of the rod projects and W ich clamps the rod so as to hold the tube in any given position and yet permit movement of the tube when force is applied thereto, the end of said rod being free so as to relieve the rod of lateraly strain when the relative position of the tube and the support is varied.

4:. A fixture comprising a hollow cylindrical part, a supportingl device projecting E otcd to said enfrafrin iece and the en a? z: n 7

therein, a bushing surrounding the supportg device and projecting into the cylindrical part, said cylindrical part having an elongated slot, a screw in said slot adapted to lock the bushing and support together, said screw being free to move sidewise in the slot to permit rotation of the support.

5. A fixture comprising `two hollow tubes pivotally connected together, an engaging piece at the end of one tube to which the other tube is pivotall connected, a laterally projecting lug on said enga ing piece, a rod pivotally connected to said ug, said rod being rictionally connected with t-he tube ivio said rod being tree.

6. A fixture comprising a hollow cylinj drical part, a tube adjustably mounted therein, means for holding said tube against longitudinal movement, a second tube pivoted to the iirst tube and in alinement therewith, a rod pivotally connected with said irst tube and frictionally connected with the second tube, an electric light socket pivotally connected with said latter tube and a conductor passing throu h said tubes to said socket.

7. A light Xture comprising two hollow tubes provided with curved parts, the ends ofthe curved parts being pivoted together so as to be in alinement to form a continuous curve, a projection on each of said tubes, a rod having one end pivoted to one of said projections and the other end projecting through the other projection, and a clamping device associated with said latter projection to clamp the rod but arranged so as to permit the sliding of the rod when the one tube is movedabout its pivotal connection with the other.

THEODORE SMITH.- Witnesses-z HOMER L. KRAFT, PERoIvAL W. TRUMAN.

Images