US472075A

US472075A - Vehicle-brake

Info

Publication number: US472075A
Authority: US
Publication date: 1892-04-05
Anticipated expiration: 1909-04-05

Description

(No Modl.)

M. POTTER. VEHICLE BRAKE.

Patented Apr. 5, 1892.

- ENVENTOR' i ATTORNEY l STATES ATENT OFFICE. I

VEHICLE-BRAKE.

SPECIFICATION forming part of Letters Patent No. 472,075, dated April 5, 1892. Application filed December 12, 1891. Serial No. 4 4, No mod l-l To all whom it may concern:

Be it known that I, MORGAN POTTER, of Fishkill on the Hudson, county of Dutchess, and State of New York, have invented certain new and useful Improvements in Vehicle-l3rakes,

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 relates to brakes of the class employed in connection with the wheels of vehicles of various patterns,'and may be regarded in many respects as an improvement on the form shown in my patent of December 27, 1887, No. 375,383.

- The principal objects of my present invention are to simplify the construction of the brake-block; to reduce its cost of manufacture; to render the one form or size of block applicable to wheels of various sizes; to increase the efficiency of the brake and insure its proper bearing and wearing when in use; to provide for the ready, certain, and easy adjustment of the block to its proper hanging upon the shaft; to render the block compact, and to provide simple and reliable means for adjusting the brake to correspond with the position and shape of the vehicle-wheel. To accomplish these objects and to secure other and further advantages in the matters of construction, operation, and use my improvements involve certain new and useful arrangements or combinations of parts and particular features of invention, as will be herein first fully described, and then pointed out in the claims.

In the drawings, Figure l is an elevation showing my improved brake-block mounted upon its shaftand the sh aft adj ustablysecured upon the brake bar or beam, all in accordance with my invention, the brake-shoe being removed from the shell so as to exhibit the interior arrangements. Fig. 2 is a side view of the brake block and shoe upon a plane cutting the shaft, portions of the block and shoe being shown in section. Fig. 3 is a face view of the shoe detached from the block.

In all the figures like letters of reference wherever they occur indicate corresponding arts.

A is the brake block or shell mounted upon its shaft B, upon which it is fitted to make a a nut a. The block or shell is in one piece.

0 is an interior spring coiled about a reduced portion of the shaft, engaging with the shaft at one end and at the other end bearing against the interior of the shell. The purpose of this spring is to hold the block in such position upon the shaft that the brake may be carried evenly and firmly against the wheel when brought into action and to auto;- matically free the brake from the wheel as soon as the braking force is released, requiring but a short travel of the brake-bar to entirely free the brake or to bring it up to its bearing on the wheel. Upon shaft B and close to the shell is a short feather b, and upon the shell are two lugs c and d, which, with feather b, serve to limit the movement of the shell around. the shaft. Through lug d I pass a set-screw e, the point of which bears upon feather b and serves to regulate the inclination at which the shell is carried, and to change this at pleasure by simply turning or unturning the screw, which is always accessilole from the exterior.

D is the shoe or the piece which is to wear upon the wheel or tire. It may be made of any material, but is preferably made of cast metal. It covers the open face of the shell, extending above and below the shell, as well as beyond its sides. It is secured to the shell by bolts, as f f, passing through the shell and provided with nuts, as g g, upon the back, where they are accessible for tightening the shoe or removing it. Upon the back of the shoe are projections or guides h h, which enter notches 1' i in the ends of the shell, thus insuring the proper seating of the shoe, as well as adding to its security when in place. Within the shell and close to the bolt-holes are stays'k and H. The shoe is brought to a firmbearing against these by the bolts f. They operate as additional bearing-points for the shoe, and they stiffen and strengthen the shell in the region of the bolt-holes. The stay is extends toward the side far enough to form a convenient bar for confining the end of the spring within proper limits of movement. The shoe D may be as wide as may be desired, and the one pattern of shell will answer for preferably cast partial revolution, and secured thereon as by' I mounting any width of shoe, thus adapting the block for light or heavy work. The face of the shoe is serrated or ribbed from the central line toward each side, and the ribs are inclined toward the top, as plainly shown in Fig. 3. By thus preparingthe face of the shoe when it is hearing against the wheel the tendency of the wear is to force its central 7 line always toward the center of the width of the tire. This is not only advantageous in the working of the brake, but it insures an even wearing and prevents any undue crowding of the brake to one side or the other. To keep the interior of the shell free of water and other accumulations I provide a draining orifice m near the lower end of the shell. This extends nearly the width of the shell, is always open, and is brought down close to the shoe, by reason of which the shell may be made quite shallow at the ends or compact, While at the same time preserving its strength and freedom from interfering or deteriorating substances within.

The shoe mounted as shown in Fig. 2 constitutes the inner cover of the shell and may be easily removed and replaced whenever required. E is the brake -bar by which the brake is brought to working position or carried away from the wheel. In connecting the shaft of the brake-block with this bar instead of making the connection immovable, as has heretofore been the practice, I provide for ad- 3' ustin g the position of the brake-block so that it may be located accurately and properly to correspond with the position of the wheel against which it is to work. Upon the under face of bar E, I secure a plate F, having ribs, as n n, and upon the upper face of the extended part of the shaft, I form a number of grooves, as 0 0, calculated to receive the ribs n, but of a greater number. (The grooves might be made in the plate and the ribs on the shaft-extension.) The shaft is secured to the bar by bolts, as G G, passing through elongated slots, as at II II, in the shaft-extension. By loosening the bolts G the shaft may be adjusted back and forth on the bar, and when in proper place firmly secured, as will be readily understood. \V heels of (litterent makes are differently dished, and this adjustable feature renders it easy to adapt the brake-block to any wheel or to change it from use on one wheel to correspond with another.

On the side of the shaft-extension toward the wheel and near the end of the bar is a lip I, extending up alongside the bar. This serves to transmit the strain on the bar to the shaft, and with the bolts makes the union amply solid and secure.

The improved device is cheap, substantial, compact, self-cleaning, and in all respects well calculated to answer the purposes or objects previously set forth.

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

1. In a brake for vehicles, the combination, with the shell journaled upon the shaft and having an interior spring, of exterior lugs, a projection upon the shaft, and a regulatingscrew arranged to bear against said projection, substantially as and for the purposes set forth.

2. In a brake for vehicles, the combination of the spring-actuated shell and the shoe covering the open face thereof, said shoe being secured in place by bolts passing through it and through the shell, substantially as and for the purposes set forth.

8. In a brake for vehicles, the combination of the shell and the shoe mounted thereon, the shoe being provided with lugs upon its back and the ends of the shell being notched to receive said lugs, substantially as set forth.

at. The combination of the shell provided wi thbolt-holes and interior stays, as explained, the shoe removably secured upon said shell and bearing against the stays, substantially as and for the purposes set forth.

5. In combination with the shell, the movable brake-shoe mounted thereon and provided upon its working face with ribs inclined from its central line toward its sides and top, substantially as shown and described.

6. The combination of the shell and the shoe covering its face, the shell being provided with a draining-orifice through its back and near its lower end, substantially as shown and described.

7. The combination, with the brakeshaft provided with grooves and slots, as explained, of the plate mounted upon the brake-bar and provided with ribs, and the securing-bolts, substantially as and for the purposes set forth.

8. The combination, with the brake-shaft adjustably mounted upon the brake-bar, of the side lip. arranged to bear against said bar, substantially as and for the purpose explained.

In testimony that I claim the foregoing I have hereunto set my hand in the presence of two witnesses.

MORGAN POTTER.

Witnesses:

M. E. CUn'rIss, GEO. M CALLAIIAN.