US290297A - Mouth - Google Patents

Description

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UNITED STATES PATENT Orricn.

RICHARD W. WVEYMOUTH, OF DENVER, COLORADO.

ELEVATOR-BRAKE.

SPECIFICATION forming part of Letters Patent No. 290,297, dated December 18, 1883. Application filed October 16, 1883. (No model.)

To coZZ whom it may concern:

Be it known that I, RICHARD W. W' Y- MOUTH, a citizen of the United States, residing at Denver, in the county of Arapahoe and State of Colorado, have invented certain new and useful Improvements in Brakes for Elevators; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to improvements in elevator-brakes; and it consists in the combination, with a car, cage, or platform, of a pair of bails or bows so formed and pivoted that their lower ends serve as pawls or grippers to catch upon guide rails or cables, and thereby stop the car upon accidental breakage of the cable or the machinery for operating it.

It also consists in certain other combina tions, which will be hereinafter described, and particularly pointed out in the claims.

In the drawings which accompany this specification and form a part thereof, Figure l is a side elevation of a car, showing one of my improved stops or brakes applied thereto. Fig. 2 is an end elevation of the same, showing the manner of attaching the cable, the springs for operating the bows, and the pawls as caught in notches on the guide-rail, the relation of the parts when suspendedbeing Fig. 3 is an end elevation, showing grippers, instead of pawls,as grasping guide-cables instead of rails, and a car or cage on an inclined track, such as might be used for mining purposes.

A is the car or cage, which may be made of any form or dimensions and of any material to suit the purpose for which it is to be used, and B B are the bails or bows through which the car is suspended from the cable 0. These suspending-bows should be firmly but loosely securedto the cars, and all the parts and connections should have a surplusage of strength above what will ever be required for the weight which is to be lifted.

I construct the body of the car and embrace it with metallic straps E E, by which the car is suspended, and then secure the rockshafts b b thereto by means of eyes orloops, as shown. The rock-shafts and bows, rigidly scoured together, are then connected with the cable 0 through its branches 0 c. The bows or bails have strong spiral or other springs attached to them near their crown, connected also with the body of the car, so that upon the breakage of the cable the arms B B will be forcibly drawn outward, and the pawls a a or grippers a a will catch or grasp the guiderail F or cable F, as shown in Figs. 2 and 8.

It is obvious that the springs may be arranged in any suitable manner, so long as they tend to throw the arms or bows B B outward with such force as to insure the quick application of the brake in case of accident.

Vhile I have shown and prefer the bows and rock-sh afts made integral with each other, it is clear that they might be made separate, and then joined in a secure manner, and serve the same purpose.

This invention is adapted alike to passenger. or freight elevators and miners cages, through obvious modifications, aswell as for inclines, tramways, or inclines for mining purposes, 8tcf Having described my invention, what Iclaim as new, and desire to secure by Letters Patent, is-

1. The combination,.with an elevator-car, of a pair of bails and two pairs of pawls or grippers, the bails and pawls being formed integral and pivoted, as described.

' 2. The combination, with an elevator car or cage, of suspending bails or levers made integral with the pawls or grippers, substantially as shown and described.

3. The combination, with an elevator-car having encircling straps, of bails, rock-shafts, pawls, and springs, the construction and combination being substantially as described.

In testimony that I claim the foregoing I hereto fix my hand and seal,this 3d day of October, 1883, in the presence of two Witnesses.

' RICHARD W. WEYMOUTH. [L. 8.]

W'itnesses:

OSCAR REUTER, GEO. M. WALKER.

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