US369736A - Brake shoe and head - Google Patents

Description

(No Model.)

J. PEACE.

BRAKE SHOE AND HEAD.

7. v t adfl P 1 \B & m m m P E My justment.

UNITED STATES PATENT OEEicE.

JOSEPH 1?. RAGE, OF ST. PAUL, MINNESGTA.

BRAKE SHOE AND HEAD.

SPECIFICATION forming part of Letters Patent No. 369,736, dated September 13, 1887.

Application filed April 19, 1887. Serial No. 235,373. (No model.)

To aZZ whom it may concern:-

Be it known that I, JOSEPH P. RACE, of St. Paul, in the county of Ramsey and State of Minnesota, have invented certain new and useful Improvements in Brake Shoes and Heads, of which the following is a specification, reference being had to the accompanying drawings and to the letters of reference marked thereon.

The object of my invention is to provide a brake-shoe adapted during the braking action to adjust itself to the face of the wheel, whereby an effective result is produced, as will be fully set forth in the following specification and claims.

In the accompanying drawings, Figure l is a sectional side view of the brake-shoe, brakehead, and brake-beam. Fig. 2 is a perspective View of the brake-shoe detached. Fig. 3 is a perspective View of the brake head and beam. Figs. 4 and 5 are respectively a top and bottom view of the brake-head. Fig. 6 shows the position relative to the face of the Wheel occupied by my brakeshoe by self-ad- Fig. 7 shows a modification of the swivel joint or hinge.

Similar letters of reference indicate similar parts in the respective figures.

A is the brake-shoe. B is the brake-head, secured to the brake-beam O. The brake-shoe is provided with two lugs. a at, having outer convex bearing-faces, the lug a being adapted to fit in a concave depression, b, in the lower part of the brake-head, and the lug a resting against the inner face of the brake-head. The brake-head is provided with a lug, b, which is so shaped as to serve to support a portion of an L-shapcd bolt, D, which passes through the brake-head and brake-beam and is provided with securing and adjusting nuts d d at its outer threaded end. The short vertical head of the bolt, which is rounded, fits loosely within a hole in the lug, a of the brake-shoe.

It will be seen that when the nuts d d are tightened the brake-shoe will beldrawn up elose'against the brake-head, the convex faces of the lugs a a of the shoe forming bearingpoints upon the head. It will also be seen that the ,shoe will have apivotal movement on the bolt D, thus enabling it to adjust itself to the face of the wheel, as shown in Fig. 6, and so have a full hearing at all times during the braking operation. In the ordinary construction of solid head and shoe the shoe must be worn to cause it to fit the wheel.

An important feature of my invention is the lug or stop 0, which, resting 011 the lug a, prevents the riding upward of the shoe, While not interfering with its pivotal movement.

In order to detach the brake-shoe .from the head it is only necessary to loosen the nuts 01 d sufliciently to free the lug a from itslower seat, when the shoe can 'be revolved, using the horizontal arm of the bolt D as a pivot, and slipped off the short vertical head of the bolt. The rounded top of the lug a admits of this rotary movement.

Having described my invention, I claim- 1. A brake-shoe having the convex bearingpoints a a, combined with the brake-head B, provided with a lug, b, and L-shaped bolt D, upon which the brake-shoe is pivoted, sub stantially as set forth.

2. A brake shoe provided with convex-faced lugs and a brake-head having a concave depression at its lower end adapted to receive one of said lugs, combinedwith a brake-beam and an L-shaped pivotal bolt, substantially as described.

3. A brake-shoe combined with a brakehead and a vertical pivot for uniting the shoe and head, the brake shoe and head having engaging-lugs for preventing the upward riding of the shoe, substantially as set forth.

In testimony whereof I have hereunto set my hand and seal.

JOSEPH P. RAGE. [L. s.]

Witnesses:

G. E. LENHART, Rom. B. WALTON.

Images