US261385A

US261385A - Lamp-holder

Info

Publication number: US261385A
Authority: US
Publication date: 1882-07-18
Anticipated expiration: 1899-07-18

Description

(No Model.)

A. ROELOFS.

LAMP HOLDER.

Patented July 18, 1882.

UNITED STATES PATENT OEFIcE.

ANTHONY ROELOFS, OF PHILADELPHIA, PENNSYLVANIA.

I LAMP-HOLDER.

SPECIFICATION forming part of Letters Patent No. 261,385, dated July 18, 1882.

Application filed June 16, 1882. (No model.)

To all whom it may concern:

Be it known that I, ANTHONY RoELoEs, a citizen of the United States, and a resident of Philadelphia, Pennsylvania, have invented certain Improvements in Lamp-Holders, of which the following is a specification.

One object ofmy invention is to so construct a lamp-holder that the accidental overturning of the lamp-fountain will be prevented, a further object being to provide a means of connectin g the lamp-supporting ring to the bracket-arm, whereby expensive fitting is rendered unnecessary.

In the accompanying drawings, Figure l is a sideview, partly in section, of a lamp and lamp-holder illustrating my invention, part only of the bracket-arm being shown. Fig. 2 is a perspective view of part of the lamp-holder and bracket-arm; Fig. 3, a sectional plan on the line 1 2,- Fig. 1; and Fig. 4, a View illus trating a modification of one of the features of the invention.-

A represents part of the bracket-arm of a lamp-holder, B the lamp-supporting ring, and D the fountain or reservoir of the lamp. The

latter has a curved body adapted to the concave ring D, and below the curved body of the fountain there is a cylindrical projection, a, to which fit snugly the projections 11 on the under side of the ring. By this means I prevent any such tilting of the lamp-fountain as would cause the same 'to be overturned, for some point on the ring B must serve as a fulcrum for any such tilting movement, and hence extended movement will. be resisted by the projections b of the ring, the latter coming into contact with the lower portion of the projection a of the lamp when the latter commences to tilt, as shown by the arrows in Fig. 1.

An annular flange may take the place of the projections b, or the'latter may be made in the form of inwardly-curved prongs, adapted to a lamp-fountain having a contracted rib or shoulder at the base, as shown in Fig. 4', the

retaining action of the prongs in the latter case being substantially similar to that of the projections shown in Fig. 1.

Lamp-holding rings are usually connected to the bracket-arms by forming on the ring a tapering vertical socket adapted for the reception of a tapering vertical projection on the arm. Such construction is objectionable, because, owing to irregularities in castin g, there can be no accurate and uniform fitting of the parts as they come from the mold and the projection or socket, or both, must be trued To secure the parts together I rely upon a cementing medium, preferably pIaster-of-paris,

the latter being applied to one or both of the parts before the same are fitted together, and serving, when set, to effectually resist the separation of said parts.

.In order that the cement may take a firm hold upon the parts, I prefer to rib or roughen the inner faces of the projections 01, and to form in the end of the arm A an opening or openings, m, to which the cement can gain access.

Instead of plaster-of-paris, I may use other cements, which can be applied in a liquid or, plastic state, and which will harden or become set on drying or cooling, the plaster-of-paris being preferred because, in drying, it has a tendency to expand, and thus insures the security of the joint.

I claim as my invention 1. The combination of a lamp-fountain having a shoulder or projection, a, with a lampsupporting ring having on the under side projections 1), adapted to engage with said projection or shoulder a and prevent the tilting of the fountain, as set forth.

2. The combination of the bracket-arm with the lamp-supporting ring having lateral projections d embracing said arm and secured thereto by cement, as set forth.

3. The combination of the lamp-supporting ring B, having lateral projections d, the bracketarm A, having ribs f, and the cement, whereby said parts are secured together, as set forth.

4. The combination of the lamp-supporting ring having lateral projections d, the bracketarm having ribs f and opening or openings m, and the cementing material, as set forth.

In testimony whereof Ihave signed my name to this specification in the presence of two subscribing witnesses.

ANTHONY ROELOFS.

Witnesses:

HARRY DRURY, HARRY SMITH.