US349909A - Hanger for extension-lamps - Google Patents

Description

(No Model.)

GQB. SOVEREIGN. HANGER FOR EXTENSION LAMPS.

No. 349,909. Patented Sept. 28, 1886.

EW/mm as UNITED STATES ATENT Erica.

GEORGE E. SOVEREIGN, OF POTTERSVILLE, NE\V JERSEY.

HANGER FOR EXTENSION-LAMPS.

SPECIFICATION forming part of Letters Patent No. 349,909, dated September 28, 1886.

Application filed June 8, 1886.

To aZZ whom it may concern.-

Be it known that I, GEORGE E. SOVEREIGN, a citizen of the United States, residing at Pottersville, in the county of Hunterdon and State of New Jersey, have invented a new and useful Improvement in Hangers for Extension- Lamps, of which the following is a specification.

My inventionrelates to an improvement in hangers for extension-lamps; and it consists in the peculiar construction and combination of devices that will be more fully set forth hereinafter, and particularly pointed out in the claims.

In the drawings, Figure 1 is a side elevation of a lamp-hanger embodying my improvement. Fig. 2 is a vertical longitudinal sectional view of the same. Fig. 8 is a vertical transverse sectional view on the line a: m of Fig. 2. Fig. 4 is an end elevation. Figs-5 and 6 show a modification. Fig. 7 is a detailed perspective view of one end ofthe frame, showing the removable block and the bracket detached therefrom.

The object of my invention is to provide a hanger for extensionlamps that will enable the lamp to be raised or lowered to any desired height. This object I attain by the mechanism herein described.

A represents a cast frame,whieh is provided on its upper side with perforated ears B for the attachment of suspending-chains, which suspend the frame from the ceiling or other object. One of the end walls of the frame is provided with an inwardlyextending horizontal hollow stud, O. The other end wall of the frame is provided with a transverse opening, D, which aligns with the central opening in the stud. -A slot, E, extends from the opening D to the lower side of the end wall of the frame, the sides of the said slot being curved in the same direction, as at e,- and in the said slot is fitted a removable block, F, the sides of which are curved, as at f, and thereby adapted to fit snugly in the curved sides of the slot and secure the said block firmly therein.

G represents a roller, one end of which is journaled in the opening D, and the other end of which is journaled in the hollow stud O. The said roller is provided at opposite extremities with drums H and I. The drum I is provided with apair of gravity catches or Serial No. 204,498. (No model.)

dogs, K, which are pivoted on the outer side of the said drum' and on opposite sides of the center thereof 5 and the said dogs are provided with projections k, adapted to enter an opening, a, which is made in the upper side of the hollow stud O.

L represents a spring which is coiled around the roller G, and has one end attached firmly to one side of the frame. The opposite end of the said coiled spring is attached to the drum I.

To the end walls of the frame are attached depending brackets M by means of dowelpins N, which enter openings made in the end walls of the frame. In the said brackets, at the lower ends thereof, is journaled a shaft, 0, the ends of which are provided with screwthreads. The thread at one end is right-handed, and the thread at the opposite extremity of theshaft is left-handed, as shown; and the pitch of these th reads corresponds to the thickness of elevating-chains It, which are attached to the drums I and H, and are wrapped once around the threaded ends of the shafts O and depend therefrom. A bar, S, is attached to the lower ends of the elevating-chains R, and from the said bar is suspended the lamp in any suitable manner.

The operation of my invention is as follows: The lamp is sustained at any desired elevation normally by one of the dogs'K engaging with the recess 0 in the frame, thereby preventing the roller having the drums from rotating. The elevating-chains are coiled on the drums in the reverse direction from that in which the spring is coiled on the roller, so that when the elevating-chains are uncoiled from the drum in lowering the lamp the spring wiii be more tightly coiled on the roller, and vice versa. The function of the shaft 0, having the right and left hand threads, is to rotate as the lamp is raised or lowered, thereby causing the threads around which the elevating-chains are coiled to move the said chains laterally, and thus dispose them properly on the drum when the chains are being coiled thereon, and prevent the chains from becoming crossed and entangled on the drums.

In order to raise or lower the lamp a slight pull is first made on the elevating-chains by grasping the bar S or the lamp, so as to trip the dogs and disengage them from the opening a, when the lamp will be free to rise or descend, as will be very readily understood. By making the drums of sufficient capacity and the spring and the elevating-chains of sufiicient length the lamp may be raised or lowered to any desired extent, so as to bring the light near the eyes of .a person seated in the room, or to elevate it nearly to the ceiling, as may be desired.

Suspended lamps are sometimes of considerable weight, more than the capacity of the form of my invention, hereinbefore described, to sustain. In order, therefore, to adapt the inventionfor use with heavy lamps I propose to construct it as shown in Figs. 4 and 5, in which I provide the frame or case with two sections arranged side by side. The perforated ears B, for the attachment of suspendi ng- I chains, are located on the upper sideof the,

frame, at the-center thereof, between the two sections, and the brackets M depend from the ends of the frame and also at the center-thereof, thus supporting the right and left hand threaded shaft directly below the center'of the frame. The roller G, with the spring, the

drums, and the dogs, is journaled in one section of the case, and in the-other sectionthereof, and arranged parallel with the roller-G, is a second roller, T. The said roller is also provided with a coiled spring, U, one end of which is attached to the roller, and theother end of the spring is attached to the frame.

On one end of the roller G is a cog-wheel, V, and on one end of the roller T is a similar wheel, W, which meshes with the wheel V,

thereby causing the rollers to rotate simultaneously and at the same rate of speed when raising or lowering the lamp. By this construction I provide two springs and rollers to the lamp-hanger, and thus double its power and adapt the same to be used for suspending and raising and lowering heavy lamps.

It will not be necessary to provide dogs to engage the added spring-roller, as the dogs K of the roller G will be found sufiicient to lock both of the geared rollers; but any desired number of the said dogs may be employed.

Having thus described my invention, I claim 1. The combination, in a lamp-hanger, of

the frame having the opening D at one end, and the slot E extending from the edge into the said opening, and the hollow stud (J at the other end, the removable block F, adapted to fit in theslot E below the opening D, and the spring roller or drum having one end jour-- naled in the hollow stud G, and the other end journaled in the opening D, substantially as described.

2. The combination, in alamp-hanger, of

the rotating drums or roller, the spring coiled I thereon, andsthe elevating-chainscoiled in the contrary direction on the roller, and the dogs or detentsto arrestthe rotation of the roller,

with the shaft 0 journaled below the roller,

and having the right and left hand threads to guide theelevating-chains on the roller, sub,-

the rightand left hand threads, and the ele:

vating-ohains attached to the roller or drum .andpassed around the threadsof the shaft 0, for-the purpose set forth, substantially as :de scribed.

Intestimony-that I claim the foregoing asniy own I have hereto affixed my signature-in presence of two witnesses.

GEORGE E. SOVEREIGN.

V Witnesses:

JOSEPH S. WAUGH, Amos 0. RATHBUN.

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