US284305A

US284305A - Friction-clamp for fire-escapes

Info

Publication number: US284305A
Authority: US
Publication date: 1883-09-04
Anticipated expiration: 1900-09-04

Description

(No Model.)

J. T. JONES.

FRIGTION CLAMP BOB, FIRE-ESGAPES.

Patented Sept.

N. PETERS PhmoLilhognpMr. wmin lon. D4 6,

son descending the flreescape.

faces around which it is coiled; and, secondly, frond more or less pressure by the hands in w as. Fig. 5 is a cross-section at y 3 showing pended.

as shown, adapted to slide onthe rope O, 'which passes inside of said tube all through and preferably'of one piece, serves to produce ,nessgwith which they clasp said handle-secthat lap past each other are cut away on the out of said tube, are then securely attached to UNITED STATES PATENT OFFIC J'PTHOMAS JONES, or UTIOA,NEW YORK FRICTION-CLAMP FOR FlRE-ESCAPES.

SPECIFICATION forming part of Letters Patent No. 284,305, dated September 4, 1883,

Application filed March 12, 1883. (No model.)

To all whom it may concern Be it known that 1, JOHN THOMAS J ONES, of the city of Utica, in the county of Oneida and State of New York, have invented certain new. and usefulgImprovernents in Friction Clamps for Fire-Escapes and other Devices, of whichthe following is a correct description.

In fire-escapes the rope has been coiled around a friction rod or barrel, and pressure has'been applied to regulate the speed of dea loop through the handle, so that the friction results primarily from the weight drawing the rope powerfully into contact with the surgrasping the handle. a i

.In the drawings, Figure 1 is a side View of i said clamp attached to a rope; Fig. 2, a front view of the same; Fig. 3, a rear view of the same. Fig. 4c is a cross-section of the same at the spring, and Fig. 6 is aview of the link for the strap by means of which the person is sus- A is a metal tube, bent in the form of a coil,

said coil. The tube being made coil shaped,

friction upon the rope, andto a greater or less degree to support the weight of the per- B is a cla1np-handle, constructed in two sections, which are held toward each other by the springs F F. These springs can be inside, so as to produce more or less friction upon the rope 0, according to their size and the tighttions together; or they canbemade with springloops with set-screws to adjustthe amount of friction or pressure placed on said rope 0. Sections of the tube Aon the straight parts outsideabout the. length of the split cla1nphandle B, and the tube is then riveted orfastened together. The sections G, that are cut the inside ofthe clamp-handleB, so that when said clamp-handle is grasped in the hands of the operatoras the two sections are pressed together friction is produced on the doubled rope, that is between said clamp and the tube A, four distinct friction-surfaces being created thereby. By making the section G of rubber or other similar material friction is applied to the rope with less pressure upon the I clamp-handle than though metal is used.

Dis a link with double eyes, the upper eye surrounding the tube A, so that a rope or belt, E, can be passed through the lower eye of the link and attached to the operator.

A section of the tube A may be cut away, so that the shoe K,which is attached to saidlink D,. presses against the rope O, and, producing friction on said rope, acts asa brake by the weight of the person suspended by the rope or belt E.

y I claim as my invention-- 1. Thetubular shield for the rope, bent into the form of a loop, with two straight parallel portions where the parts of the rope lie side by side, in combination with the two-part clamp B, constructed and operating substantially as set forth.

2. The tubular shield for the rope, bent into the form of a loop, and parallel where the two portions of the loop lie side by. side, in combination with the two-part clamping-handle B, and the tube-sections G, secured within the handle B, substantially as specified.

3. The tubular shield, formed as a loop, through which the rope passes, in combina tion with the link D and friction-shoe K, connected to such link and the suspendingstrap or waist-belt, substantially as set forth.

4. Incombination with the tubular shield and rope, the tube-section G, of india-rubber or similar material, substantially as specified.

Signed by me this 7th day of March, A. D. 1883.

J. THOS. JONES.

Witnesses: a

MoRTIMERG. THOMSON, JNo. A. ROBERTS.