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Publication numberUS558609 A
Publication typeGrant
Publication dateApr 21, 1896
Filing dateDec 24, 1894
Publication numberUS 558609 A, US 558609A, US-A-558609, US558609 A, US558609A
InventorsGeorge Peebles
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
George peeples
US 558609 A
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Description  (OCR text may contain errors)


No. 558,609. PatentedApr. 21, 1896.




SPECIFICATION forming part of Letters .Patent No. 558,609, dated April 21, 1896. Application led December 24;, 1894. Serial No. 532,803. (No model.)

To all whom t may concern.-

Be it known that I, GEORGE PEnPLns, a citizen of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Drop-Light Electroliers, of which the following is a specification, reference being had therein to the accompanying drawings.

My invention relates to certain improvements in drop-light electroliers, and has for its object to provide a device of this character of simple and economical construction, and in which the circuit will at all times remain unbroken, as more fully set forth hereinaftcr.

In the accompanying drawings, Figure l is a sectional elevation of a drop or extension electrolier made in accordance with my invention. Fig. 2 is an elevation of the contactcarrier on an enlarged scale. Fig. 3 is a transverse sectional elevation of the same on the line 3 3, Fig. 2. Fig. el is a sectional plan View on the line 4 et, Fig. 2; and Fig. 5 is a detached v perspective view of one of the traveling contact-blocks.

The device forming the subject of my invention is one of that class in which a lamp or series of lamps are carried on the lower end of an extensible bar or tube, adapted to slide within the central main tube of the electrolier, so that when desired the bar or tube may be pulled down to lower the lamp or lamps to a convenient position, as for dining or reading room purposes.

Referring to the drawings, A represents the central supporting-block or main body of the electrolier, fromwhich may extend a series of ornamented branches for the support et the various fixed lamps, the branches being usually curved in graceful lines and extending down to about the lower end of the central tube A of the electrolier, the upper end of the tube being indirectly connected to and supported at its upper end by the main body A, while to its lower end is secured any suitable form of extension box ordinarily employed for extension lamps.

The main body A is connected to the tube A by an internally-tlneaded collar al, which is screwed into the tube and on a threaded portion of the body A. Within the upper end of the tube A and secured to the lower face of the body A is a circular block O, of hard rubber or equivalent insulating material, the upper faceof the block being recessed for the reception of the ends of two guide rods d of conducting material, which pass through openings in the block and are held in place by small nuts d.

The main body A is provided with two openings ct, through which pass current-conducting wires c and a3', the ends of which are attached to the ends of the rods d by screws e so as to bring the rods in circuit, while to lessen the danger of short-circuiting a few sheets f of mica or similar material are placed between the upper portion of the block C and the body A, openings being made in the mica for the passage of the conducting-wires and w.

At the lower end of the tube A is secured a box I3, comprising an upper flanged disk l), a cup-shaped body b', within which is a tapered spring-held ring b2, carrying a number of balls b3, adapted to bind upon the exten- 7 5 sion tube C, which carries the lamp or lamps to be lowered, the form of box shown being one ordinarily used for such purpose and forming no part of my present invention.

The upper disk b of the boxis provided with 8o two orifices forthe reception of the lower ends of the rods d, the latter bein gsecured in place by nuts (Z2 and insulated from the disk b by perforated blocks g, of rubber or similar nonconducting material. The bars CZ are thus 8 5 held perfectly rigid at top and bottom, being connected, as before described, to the wires m and at their upper ends, while within the tube G are two wires y] y, which extend to the lamp or lamps carried at the lower end of the 9o tube.

To complete the circuit from the wires fr a." to the wires `g/ y', Iproceed as follows: To the upper end of the tube Gis secured a block Il, formed of hard rubber, porcelain, or similar 95 material, having at its upper and lower ends disks 7L h, which fit snugly within the tube A but are free to move with the block within said tube. The disks 7b are provided with openings 7L', through which pass the rods d, se roo that in the vertical travel of the block it iS guided by the two rods and by the inner surface of the tube AC Fitted within suitable recesses in the block H are two posts or blocks to whichthe ends of the Wires y y' are electrically connected by screws Z. To the ends of these posts Z are secured springs 7c, carrying at their free ends contact-blocks K, the faces of which are partly recessed and fitted snugly against the rods cZ, good contact being insured by the action of the springs 7s and auxiliary coiled springs Z adapted to recesses in the block H and pressing against the rear faces of the contactblocks K.

In operation the connections are all secure,` the connections between the wires 00 9: and the posts and between the contact-blocks K and the wires y y being rigid, while the springs k and Z insure good contact between the blocks K and the rods (Z. There can be no turning or twisting of the parts and the connections are in no danger of being broken from this the most common cause of accident in extension-lamps as usually made.

The lamp carried by the tube G may be of any suitable character and connected in the usual manner to the wires y y. This and the lamp-brackets of the electrolier have been omitted from the drawings for the sake of clearness, as they form no part of my invention.

It will be understood that various modifications of my invention may be made without departing from my invention--as, for instance, the wires y ,1/ may be connected directly to the blocks K, and one of the springs 7c or Z may be omitted, if desired.

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

1. The combination of the main body, the

main tube, an extension-box at the lower end of the tube, rigid guide-rods provided in said tube and insulated therefrom, said rods being in the main circuit, an extensible lampcarrying tube, a block of insulating material provided at the upper end of said lamp-carrying tube, upper and lower disks in said block, guiding-openings in the disks for the passage of the guide-rods, blocks of conducting material carried by said insulated block and in circuit with the lamp-wires, and springs acting to force said blocks into contact with the rigid guide-rods. 2. The combination with the rigid guidebars of the extensible lamp-carrying tube, wires therein extending from the lamp, a block H carried by the upper end of said tube, disks h on said block having openings for the rigid guide-rods and spring-pressed blocks K in contact with the guide-rods and electrically connected to the lamp-Wires, substantially as specified.

3. The combination with the rigid guidebars of the extensible lamp-carrying tube, wires therein extending from the lamp, a block H carried by the Lipper end of said tube, disks h on said block having openings forthe rigid guide-rods7 springs 7c carried by said insulated block and electrically connected to the lamp-Wires, blocks K ycarried by said springs in contact with the rigid guide-bars, and auxiliary coinpression-sprin gs Z between the blocks K and the opposite faces of the block H, substantially as specified.

In testimony whereof I affix my signature in the presence of two witnesses.




Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2711475 *Aug 26, 1950Jun 21, 1955Perfection Stove CoVertically adjustable lighting fixture for cooking stoves or ranges
US5240218 *Oct 23, 1991Aug 31, 1993Loma Linda University Medical CenterRetractable support assembly
Cooperative ClassificationA61M5/1415