US1207253A - Third-point support for brake-beams. - Google Patents

Description

C. H; WIILLIAMS.

THIRD POINT SUPPORT FOR BRAKE BEAMS.

APPLICATION FILED MAY B. 1916.

Patented Dec. 5, 1916..

CHARLES HAINES WILLIAMS, OF CHICAGO, ILLINOIS, ASSIGNOIt 'IO CHICAGO RAILWAY EQUIPMENT COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

THIRD-POINT SUPPORT FOR BRAKE-BEAMS.

motes To all whom it may concern Be it known that I, CHARLES HAINES WILLIAMS, a citizen of the United States, residing at Chicago, Il'linois, have inventeda certain new and useful Improvement in Third Point Supports for Brake Beams, of which the following is a full, clear, and exact description, such as will enable others skilled in the art to which it appertains to make anduse the same, reference being had to the accompanying drawings, forming part of this specification, in which Figure 1 is a side elevational view of my improved third point support. Fig. 2 is an end elevational view of the same. Fig. 3 is a side elevational view of a modified form of third point support. Fig. 4 is an end elevational view of the same partly'in section.

This invention relates to a new and useful improvement third point support brake beams, and is designed particularly as an improvement upon the'type of third point support shown in patent to Posson, N 0,789,879, dated lt Iay 16, 1905.

' In the Posson construction, when the' brakes are applied, particularly with a new shoe, the end of the strut'is sprung upward and out of position, this springtending to twist the strut out of shape. The rigid link forming a member er the parallelogram together with the brake lever, causes the shoe to first strike the tread of the, wheel at the bottom, thereby producing an uneven wear. As long as the shoe cont1nues to wear unevenly, the strut may be somewhat relieved and not distorted, but the tendency is, at all times, to cause heavier pressure at the bottom than at "the top of the new shoe. This distorting movement-being produced by rigid connections, cannot result otherwise than in an uneven wear of the shoe which at all times is objectionable.

My present improvement contemplates a flexible link which. will at the brake beam so that it is capable of norinal application, permitting the end of the strut to move downwardly, to adjust itself, when the brakes are applied. I have shown my improvement in the form of a Hat spring and coil springs, but it is obvious that other forms of yielding connections could be emlo ed. p I am aware of United States Letters Patent to Robischung, No. 543,703, dated July 30, 1895, and also Patent No. 654,241, dated Specification of Letters Patent.-

all times support" Patented Dec. a, rare.

Application filed May 8, I916. Serial N 0. 98,093.

July 24, 1900, to Francis, but in both of these patents thethird point support, if it may be so called, is "carried by the truck and is not in the form of a yielding connectioln between the strut and the connection ro In the drawings, 1 indicates the end of the brake lever strut having a nose extension 1 for the attachment of the third point supporting member.

2 is the connecting rod to which the brake lever, not shown, is pivotally connected, said brake lever also being pivotally mounted in the strut and having its upper end connect-s ed to a pull rod, not shown, as is usual.

3 is a fiat spring, preferably having an S-shaped bend in, its middle andwhose ends, arranged at the proper angle, are secured between washers 4 held in place by pins 5 and 6, passing through openings in the nose 1 of the strut and the end of theconnecting rod, respectively, as shown. When the brakesare applied, the ends of spring 3, pivotally connecting the end of thestrut and the connecting rod, will be compressed to absorb the relative diflerence in the arc of movement of the brake supporting hangers, levers, etc. In idle position, the centers A and B are as indicated in Fig. 1. When the brakes are applied, these centers Would be moted to points A and B, where a rigid link was employed, which would be an improper location of the center A. The proper location of center of the strut eye should be at the point A", to avoid uneven wear of the shoe, and this proper location is attained by a slight compression of the spring 3 which permits the inner endof'the strut to be drawn downward so that the-face of a new shoe would bear evenly on the tread of the wheel. The shoe can thus are commodate itself to the treadof the wheel without placing' any distortional stresses on the brake beam during the time that the brakes are being applied and when the brake beam is under load.

In Figs. 3 and 4, I have shown the modified form of third point support in which an eyed pin 7 is pivotally mounted to the strut, said pin being received in the sleeve 8 on the cross connecting member 9, being sur- I rounded by the spring 10 which presses upon said cross connecting member and a spring follower 11 adjacent the strut. A cotter pin 12 through the lower end of the pin 7 holds the parts together. The cross connecting member is provided with a bearing 13 at its outer end for receiving a perforated eyed pin 14. A cotter pin 15 enables 5 this pin 14 to be adjustably mounted inits bearing 13., The lower end of pin 14: is pivot-ally connected to the connecting rod 2. The operation of the structures shown in Figs. 3 ,and 4 is similar to that described with respect to Figs. 1 and 2, but the form shown in Figs; 3 and 4:- possess the additional advantage of adjustment with respect to none of its connecting members.

It will be readily understood that minor changes in the size, form and construction of the various parts of my improved third point support for brake beams can be made and substituted for those herein shown and described, without departing from the spirit of my invention, the scope of which is set forth in the following claims.-

I claim-: 4 1. In a third point support for brake beams, the combination of a brake beam strut, a flexible third point, support connected-to said strut, and non-flexible means constituting part of the brake rigging for supporting said third point support.

2. In a third point support for brake beams, the combination of a strut of a beam, a flexible third point support pivotally connected thereto, and a connecting rod to which the opposite end of said third point support is connected.

3. A third point support for brake beams comprising the combination of a brake beam strut, a connecting rod, and a yielding third point support connected to and carried by said strut and said rod.

4. A third point support for brake beams comprising the combination of a brake beam strut, a connecting rod, and a flat spring pivotally connected to said strut and said rod, said spring having a reverse bend in its length. I

In testimony whereof I hereunto afiix my signature in the presence of two witnesses, this 2nd day of May, 1916.

C. HAINES WILLIAMS.

Witnesses:

ELENOR ORR,

E. T. WALKER.

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