US481814A

US481814A - Extension-chan deli er

Info

Publication number: US481814A
Authority: US
Publication date: 1892-08-30
Anticipated expiration: 1909-08-30

Description

P. OVERHOLT. EXTENSIQN UHANDBLIBR.

Patented Aug. 30, 1892.

Il lll (No Model.)

Unirse STATES Armar FRANK OVERHOLT, OF HARLAN, IOIVA.

EXTENSION-CHANDELIER.

SPECIFICATION forming part of Letters Patent No. 481,814, dated August 30, 1892.

Application tiled May 31, 1892. Serial No. 434.986. (No model.)

To all whom it may concern.-

Beit known that I, FRANK OvERHoLT, a citizen of the United States, residing at Harlan, in the county ot' Shelby and State of Iowa, have invented certain new and useful Improvements in Extension-Chandeliers, as set forth in the accompanying drawings, forming part of this specification, in which- Figure l represents a vertical sectional View showing the telescopic tubes of an extensionchandelier and interior spirally-twisted conducting-wires and showing the parts extended. Fig. 2 is a similar View showing the tubes telescoped one within the other and the conducting-wires contracted. Fig. 3 is a modiication to be referred to.

My invention relates to extension-chandeliers especially adapted for electric-lighting purposes; and my invention consists ot the construction and combination of devices,

which I shall hereinafter fully describe and claim.

To enable others skilled in the art to which my invention appertains to make and use the same, I will now describe its construction and indicate the manner in which the saine is carried out.

In the drawings, A, A', and A2 represent a series of tubes having different diameters, whereby they may slide one within the other. In the present case I have shown three tubes, and in which the upper one A is the largest and has its lower end formed with an inwardly-turned flange or screw-cap a, and its upper end provided with a plate or other means for suspending the tubes from a iixed support. The middle tube A is fitted within the upper tube and has its upper end formed with an outwardly-turned flange or screw-cap b closely itting the inner walls of the upper tube, While at the lower end of this middle tube is an inwardly-turned ilange or screw-cap c. The lower tube A2is titted within the middle tube A and has its upper end formed with an ontwardly-turned flange or screw-cap d and its lower end formed or attached to any desired form of lamp socket or support B, which furnishes a support for one or more lamps or burners. 1 (Not shown.)

In the lower or upper portions of the tubes A and A spring-plates e are secured at one end and have their upper ends free and adapted to bear inwardly against the outer walls ot the middle and lower tubes, respectively, whereby the frictional contact of these spring-plates will assist in holding the tubes in any adjusted position and to retain them in a closed or telescoped condition when desired. These plates .also assist in steadying the tubes when the latter are extended and prevent their being extended too far. To assist this holding of the tubes and to provide a simple means for conducting the current ofY electricity from its source of supply to the lamp or burner, I arrange within the central passage ot the tube the spirally twisted or coiled insulated wires G and II, one ot' which connects with the positive and the other with the negative poles of the battery in any well-known manner. These wires G and I-I are preferably of spring metal, and being spirally coiled assist the springplates in holding the tubes closed, or in their adjusted positions, their coils being distended when the tubes are pulled out, as shown in Fig. 1, and contracted when the tubes are pushed into each other or telescoped, as shown in Fig. 2. The wires are properly insulated from each other and the tubes, and they not only serve to carry the current, but also employ the expansive and contractive force of the coils to assist in suspending the tubes when the latter are extended, and also to maintain them closed when the tubes are pushed together.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

l. In an extension-chandelier, the telescopic tubes, the lower one of which is provided with means for supporting a lamp or burner, said tubes having limiting-stops at their ends and one of said tubes carrying a lamp-socket, in combination with spirallycoiled wires within the tubes to be connected with the ope posite poles of an electric circuit and to assist in supporting the Weight of the tubes and maintain them in their adjusted positions, substantially as herein described.

2. In an extension-chandelier,the telescopic tubes having inwardly and outwardly turned iianges at their ends and a lamp-socket carried by the lower tube, in combination with conducting-wires within the tubes and to be connected with a source of electric supply,

said Wires being spirally coiled, whereby they are distended when the tubes are extended and contracted when the tubes are telesooped, substantially as herein described.

3. In an extension-chandelier having telescopic tubes with inwardly and outwardly turned end flanges, the spring-plates secured to the inner Walls of the tubes, with their free ends bearing against the outer walls of adjacent tubes, and spirally-coiled Wires eKtend- 1o ing through said tubes to assist the springplates in maintaining the tubes in their adj usted positions, substantially as herein described.

FRANK OVERHOLT. Witnesses:

EDWARD R. FISHER, HERMAN NOBLE.