US392884A

US392884A - Peterg

Info

Publication number: US392884A
Authority: US
Publication date: 1888-11-13
Anticipated expiration: 1905-11-13

Description

(No Model.)

P. P. .RIOKENBAOHER. BRAKE BLOOK.

No.892g884. Patented Nov. 13, 1888.

N PETERS. Phnlo-L'llhogrlphnr, Wuhingion. 0. C.

PAUL P. RIOKENBAOHEB, OF WASHINGTON, DISTRICT OF COLUMBIA, AS- SIGNOR TO THE NATIONAL BRAKE-BLOCK COMPANY, OF SAME PLACE.

BRAKE-BLOCK.

SPECIFICATION forming part of Letters Patent No. 392.884, dated November 13, 1888..

Application filed August 18, 1888. Serial No. 283,128. (No model.)

To all whom it may concern:

Be it known that I, PAUL P. RICKENBAOHER, a citizen of the United States, residing at Washington, in the District of Columbia, have invented certain-new and useful Improvements in Brake-Blocks; and I do hereby declare the following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which it appertains to make and use the same.

The invention relates to certain improve ments in brake-blocks for vehicles; and it consists in the peculiar construction and arrangement of the several parts, as will be more fully i 5 hereinafter explained in the specification and specifically claimed.

' Theolaject of the invention is to constructa simple, cheap, and at the same time durable brake-blockone that will be most effective in operation and which can under all circumstances be brought squarely against the wheel, even though a larger portion of its workingface should be worn away. This object I attain by the mechanism illustrated in the accompanying drawings, in which Figure 1 represents a perspective view of a brake-block embodying my invention. Fig. 2 is a longitudinal sectional view of the same. Fig. 3 is a cross-sectional view on the line 00 :r of Fig. 2.

In the drawings, the letter A indicates a brake-bar or shaft, such as is usually located in the front of the vehicles rear wheels; and B, a brake-block secured to saidshaft and adapted 3 5 to be brought into contact with the periphery of said wheels in the usual manner.

The shaft Ain the present case has a threaded end, a, which is provided'with a nut, a, and is also provided with a shoulder or flange, O, 40 the lower surface of which is rounded or camshaped, for a purpose as will presently appear. The brake-bloeks of many vehicles now in use have been heretofore constructed of wood, and sometimes the wearing-faces of these 5 blocks are protected by a plate of metal or shoe; but in either case the wear upon the blocks when applied to heavy road-wagons is such that in a comparatively short time the said blocks become worn to such an extent as to greatly impair their usefulness, thus rendering it necessary to replace them with new ones. In the present instance I have con structed the block preferably of cast-iron, the slightly-increased cost and weight of which are more than compensated for by the length of time the block may be used. At the same time, owing to its shape, the block may be cast with but little trouble and cost.

The block B has its working-face curved to correspond with the curvature of the wheel, and is provided on its rear with a loop, I), the inner face of which is set back sufficiently far from the corresponding face of the block to form a shoulder or seat, D, as shown in Figs.

1 and 2, and against which the curved or camshaped portion of the flange O rests. The outer end of the shaft A is passed through the loop 2) until the flange O is brought against the inner face of said loop, and the nut a screwed upon the threaded end of said shaft until it meets or abuts against the outer face of the loop, but not with sufficient force to prevent the brake-block from turning slightly upon its axis.

From this description it is manifest that when the brake-block is brought against the tire ofthe wheel it will oscillate upon the shaft, and thus bring its Working face squarely against said wheel. By reason of the curved or cam-shaped flange the block is permitted to oscillate, but only sufficiently to cause it to be brought directly against the tire of the contiguous wheel.

It is well known that one of the most common and annoying results incident to many of the blocks as at present constructed is the liability of the block turning on its axis sufficiently to throw the block entirely over, thus impairing the working of the block and necessitating its removal and readjustment. My 0 invention is designed to overcome this objectionable feature, and, as will be observed, it is accomplished by the engagement of the block with the cam-flange, which prevents the block under any possible circumstances from rotating in an are greater than what is necessary to bring the curved face of the block squarely against the periphery of the wheel.

The loop I) is provided with a set-screw, E, or equivalent device, whereby the block is eoaae t prevented from slipping off the shaft in the event of the nut a by accident becoming detached from the end of the shaft. The upper portion of the shaft within the loop is slightly 5 cut away, as shown at e, to be engaged by the set-screw.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is- 1o 1. Thecombina-tiomwith a brake-bloekhaving a shoulder, of a shaft or brake-bar havingv a flange provided with a cam-surface engaging said shoulder and limiting the oscillatory movement ofsaid block, substantially as'speci- 15 fied.

2. The combination, with a metallic brake block having a loop to receive the end of the brake-bar or shaft and a shoulder, of a shaft PAUL P. RIOKENBAGIIER.

\Vitnesses:

ANDREW MAYER, CHAS. XV. DARR,