US167984A - Improvement in friction-clutches for extension-chandeliers - Google Patents

Description

E. C. BRUEN.

Friction-Clutch for Extension Chandeliers.

Patented Sept. 21,1875.

w w W EDWIN O. BRUEN, OF BROOKLYN, NEW YORK, ASSIGNOR TO HIMSELF AND CHARLES T. BRUEN.

IMPROVEMENT IN FRICTION-CLUTCHES FOR EXTENSION-CHANDELIERS.

Specification forming part of Letters Patent No. 167,984, dated September 21, 1875; application filed August 28, 1875.

To all whom it may concern Be it known that I, EDWIN O. BRUEN, of

Brooklyn, in the county of Kings and State of New York, have invented a new and 1mproved Friction-Clutch for Extension-Ghandeliers, which improvement is fully set forth in the following specification, reference being bad to the accompanying drawing, in which Figure 1 represents a plan view of my clutch when the upper division of the shell is removed. Fig. 2 is a vertical central section I thereof in its complete form.

clamp arranged loosely in the shell, and in conjunction with an adjusting device for regu' lating the actiouof the clamp, the whole being arranged in such a manner that when the slide is moved upward, together with the chandelier, it carries up the clamp and the movement of they slide is unimpeded, while, by means of the adjusting device, the position of the clamp can be so regulated that it prevents the slide from moving down by its own inherent gravity and that of the parts attached thereto.

In the drawing, the letter A designates the exterior shellof my clutch, which .part I prefer to make in two divisions and unite by screws a, or by any other suitable means. On the upper division of this shell A is formed a screw-thread, B, which serves to connect it to the main gas-pipe O of an extension-chandelier fixture; or, if seen fit, a bayonet-joint or any other equivalent device may be used in lieu of the screw-thread. D designates the slide of the extension-chandelier, having the form of a pipe, packed and arranged to slide in the main gas-pipe O, the slide passing also through the clutch, and to this end the shell A has openings E F on its 'top' and bottom ends-one of the openings containing a lift ing-screw, H, as hereinafter described.

The interior of the shell A is inclined or is made to taper or decrease in diameter toward the lower end, so that it has the form of an inverted truncated cone, and to the said tapering interior of the shell is fitted a frictionclamp, G, which is divided into three (more or less) parts, as shown in Fig. 1. This frictionclamp G rests loosely in the shell A, and its interior surface is made tubular so as to surround the chandelier-slide D when the same is passed through the clamp. By the inherent gravity of the clamp it tends to fall to the bottom of the shell, and if an attempt is made to move the shell down, or if the slide is permitted to follow its inherent gravity, the clamp is caused to wedge itself firmly against the same, and by these means the slide and the chandelier which it supports is prevented from moving downward.

it is obvious that whenthe slide is moved upward it displaces and carries with it the friction-clampG, and therefore the slide moves freely upward.

With the clamp'G I have combined an adjusting device, H, which may be constructed of a screw, as shown, or which may be made in the form of a cam or lever or in any suitable form. By means of this adjusting device I regulate the power with which the clamp hugs the slide, so that, if desired, the slide can be drawn down by applying the proper force. This purpose is facilitated by interposing between the metallic surfaces of the clamp and of the slide a lining, c, of leather, flannel, or other suitable material, whereby the clamp is kept from abrading and cutting in the surface of the slide. If the sections of the clamp are made of wood or other'soft material, the lining can be dispensed with. The action of the clamp on the slide D is insured by subjecting the clamp to the action of the springs I, which are placed in sockets b in the top of the shell, and which have a tendency to press the clamp downward,

EN'I FFICE- The clamp G, instead of being made of wedge-shaped sections, may be constructed of oneor more balls or rollers, whichfit between the inner surface of the shell A and the slide D, and which are subjected to any suitable lifting or adjusting device.

What I claim as new, and desire to secure by Letters Patent, is-- v A friction-clutch for extension-chandeliers, constructed of a tapering shell, A, a friction-clamp, G, and of an adjusting device H,

the whole being combined and adapted to o'pcrate substantially as described.

In witness whereof I have hereunto set my hand and. seal this 9th day of August, 1875.

E. c. BRUEN. Ls

In presence of- GHAs. WAHLERS, J. VAN SANTVOORD.

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