US257547A - James e - Google Patents

Description

(No ModeL) J. E. BROWN.

EXTENSION OHANDELIER.

Patented May 9, 1 882.

UNTTED STATES PATENT @rrrCa.

JAMES E. BROWN,.OF BROOKLYN, ASSIGNOR TO THE ARCHER AND PAN- GOAST MANUFACTURING COMPANY, OF N ElV YORK, N. Y.

EXTENSlON-CHANDELIER.

SPECIFICATION forming part of Letters Patent No. 257,547, dated May 9, 1882.

Application filed April 8, 1882. (No model.)

To all whom it may concern:

Be it known that I, JAMES E.Bnown, of Brooklyn, county of Kings, and State of New York, have invented certain new and useful Improvements in Extension-Ohandeliers, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, and to the letters of reference marked thereon.

My invention has relation to that class of extensionchan deliers, gasaliers, or drop-lights wherein the vertically-adjustable tube or rod is twisted or otherwise formed with spiral ribs, which, as the tube or rod is moved in a longitudinal direction, communicate a rotary motion to a surrounding block or washer, which in turn is connected with the friction-producin g appliance.

The object of my invention is to produce a simple, compact, durable, and effectively-operatin g clutch mechanism for holding the droplight tube in any position to which it may be adjusted, and which will admit of the droplight being raised with little or no effortbeyond that required for overcoming its weight.

To this end my improvements involve certain novel and useful peculiarities of construction and relative arrangements or combinations of parts, all of which will be herein first fully described, and then pointed out in the claims.

In the accompanying drawings, forming part of this specification, Figure 1 is a longitudinal section and partial elevation, showing my improved clutch in the position it assumes when holding the central tube or rod, or when thesame is being forced downwardly; and Fig. 2, a similar view, indicating the position assumed when the tube or rod is being elevated. Fig. 3 is a plan of the lower part of the clutchcasin'g with the friction-spring in place, the cap and revolving block being detached. Fig. l is a perspective view of the friction-sprin g shown in former figures, and Fig. 5 a similar view of the revolving block which engages with the spring.

In all these figures like letters of reference, wherever they occur, indicate corresponding parts.

A is the central tube or rod intended to carry the burner or burners, and made adjustable vertically for the purpose of raising or lowering the light.

B is a gas-conducting tube or other tube or support for the clutch, from which side pipes may be extended, if desired, and within which the pipe or rod A slides up and down. Upon the lower end of tube 13 the casing of the clutch mechanism is secured by screw-joint, or in other suitable manner. The clutch-casing is composed of two main parts-the base or bottom part, 0, and the cap or cover D-eonnected therewith by screw-joint or equivalent.

Within the base (J is a hollow standard, E, between which and the wall of the [base there is an annular chamber for the accommodation of the friction-sprin g F. This friction-spring is bent substantially as shown, so that it may travel around in the annular chamber provided for it and bear against the wallet the base, as well as against the hollow standard. The revolving block G has a serrated flange for engagement with the fold of the spring F, and it is made to turn by the spiral flutes or projections upon the pipe A, which, as the said pipe moves up or down, bear against the margin of the perforations through the block.

When the sliding tube is pulled down the block turns, and with it the spring F, the latter producing sufficient friction to hold the rod or tube A secure against any accidental slipping down, or sufficient to prevent it from being lowered unless by application of force in addition to its weight and the weight of the attached parts. Abovethe central standard and beneath the flange a of the cap the revolving block has sufficient room in which to be elevated, so as to disengage the teeth f f of the serrated flange from the spring. As soon as the rod or tube Ais elevatedit carries the block up with it, releases the spring, and the block is thus left to turn freely, enabling one to elevate the slide easily and without the produe tion of any undue friction. The spring is of course gaged in strength to correspond with the weightrequired to be sustained. The spring being free at both ends, and only one ratchet or serrated block required to effect the clutching and unelutching, I am enabled to dispense with large and cumbersome constructions, to

The central rod or tube may be kept from turning by any preferred arrangements.

It has not been deemed necessary to illustrate the burners. Of course these may be of any number and maybe disposed as best suits the taste.

The invention is peculiarly applicable in gasfixtures; but lamp or other burners may be connected with the central tube or rod, and generally the improved device is adapted for use in any situations where it is desired to hold the slide, as above indicated.

The improvements will be found in practice to answer all the purposes or objects of themvention, as previously stated.

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

1. The friction-spring bent as explained, and bearing against the walls of the annular chamber formed in the clutch-casing,said spring being moved by the turning block as the sliding pipe or rod descends, substantially as and for the purposes set forth.

2. The spiral pipe or rod, the bent frictionspring located and movable in an annular chamber formed in the clutch-casing, and the turning block having a serrated flange, the teeth of which engage with the fold of the spring, the several parts being combined and arranged substantially-as shown and described.

3. The combination of the spiral pipe or rod, the clutch-easing having an annular chamber formed in the lower part, the bent spring bearing against the walls of said chamber, the turning 'block having the serrated flange made to engage with the spring during any downward tendency of the slide, and to release the spring when the slide is elevated, and the removable cap, substantially as and for the purposes set forth.

In testimony thatIclaim the foregoing l have hereunto set my hand in the presence of two witnesses.

JAMES E. BROWN.

Witnesses:

A. H. Nouns, BENJ. F.'ALLEN.

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