US1478565A - Third and fourth point support for brake beams - Google Patents

Description

' Dec. 25,1923.

A. W. HAWKINS THIRD AND FOURTH POINT SUPPORT'FORQBRAKE BEAMS Filed Feb. 14 1922 Patented Dee. 25, 1923.

U 4 .1 TIES FAIENI FIQE.

ARTHUR W. HAWKINS, OF CHICAGO, ILLINOIS, ASSIGNOR IO CHICAGO RAILWAY EQUIPMENT COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

THIRD AND FOURTH POINT Application filed February To all whom it may concern:

Be it known that I, ARTHUR IV. HAWKINS,

a citizen of the United States, residing at the city of Chicago, county of Cook, and State of Illinois, have invented a certain new and useful Improvement in Third and Fourth Point Supports for Brake Beams, of

which the following is a full, clear, and exact description, such as will enable others skilled W in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, forming part of this application, in which Figure 1 is a side elevational view of my improved third point support for brake beams.

Figure 1 is a sectional view on the line (6-(& of Figure 1.

Figure 2 is a side elevational view showing the position of the parts on a shoe that is worn.

Figure 8 is a detail view of a modified form of support.

Figure 4. is a detail view of another modified form.

Figure 5 is a detail view of my improvement as applied to a fourth point support.

This invention relates to a new and useful improvement in third and fourth point supports for brake beams, the object being to provide a construction which will insure an even wear of the brake shoe when the same is applied and when the brakes are released cause the brake shoes to be tilted so that their upper ends will lie well away from the wheels.

I-Ieretofore, in the use of third and fourth point supports for brake beams, the supporting shoe or chair has been carried by the inner end of the strut, said shoe or chair riding up a yielding inclined track support, or rolling upon a support whereby the inner end of the beam, i. e., the part of the beam whereby the strut supports the tension memr her. is raised when the brakes are applied.

In my present invention, the track support is made yielding and carries in fixed relation thereto a saddle or roller upon which the inner end of the strut rides, the

parts being so designed that when the brakes are applied the inner end of the strut will be slightly depressed, and when the brakes are released the inner end of the strut will be slightly raised so as to tilt the upper end of the shoe away from the, wheel. When SUPPORT FOR BRAKE BEAMS.

14, 1922. Serial No. 536,541.

used in connection with fourth point supports, the same action occurs, but for fourth point supports separate bridge pieces between the compression and tension members 311L181] be provided to co-operate with the sad- In the drawings, 1 indicates a spring plank of a truck, usually in the form of a channel member, to which is secured a safety bar member 2. On the end of this bar memher is a resilient third point support 3 carrying a saddle roller 4, at or near its outer end, upon which rests and rides the inner end of the strut 6 of the brake beam. 7 is the compression member of the beam. 8 is the tension member, 9 the brake bead, 10 the brake shoe, and 11 the brake hanger.

As shown in Figure 1, a new or unworn shoe is illustrated in its released position in full lines, and when the brake is applied the curve of the shoe will fit the periphery of the wheel causing the inner end of the strut to be depressed, as indicated by dotted lines, thereby depressing the saddle roller. When the brakes are released, the saddle roller will be raised lifting the inner end of the strut and causing the brake shoe to be tilted to the full line position shown, wherein its upper end is further away from the wheel than its lower end, a condition which is to be desired in practice.

In Figure 2, I have shown a worn brake shoe in its applied position, in the full line position of which it will be noted that the inner end of the strut is only slightly depressed and when the brakes are released, as shown by dotted lines, the upper end of the shoe will be tilted further away from the wheel than the lower end.

In Figure 3, I have shown a saddle member 12 as being formed integral with the yielding track member; while in Figure 4 I have shown an integral saddle member 13 as being formed on a return or bent portion of the yielding supporting member.

In Figure 5, I have shown a fourth point support in the form of a saddle roller 15 arranged at the end of a yielding supporting member 16, said saddle member co-operating with a bridge piece 17 having one end .bent around the tension member and its opposite end riveted to the compression member.

IVhat I claim is:

1. In a brake beam support, a yielding member fixed to a truck portion, and a saddle member arranged on the freeend of said yielding member and adapted to slidably engage a part of a brake beam.

2. The combination of a brakebeam, of hangers therefor, and means for tilting the beams on the hangers, When the brakes are released, whereby the upper edges of the brake shoes are moved away from the Wheels in a released position.

3. In a brake beam support, a safety bar, a yielding member attached thereto, a saddle member on the end of said yielding member, and a brake beam having a part engaging said saddle member.

4. In a brake beam support, the combination of a brake beam, hangers therefor, a

flexible member carried by a part of a truck, and a member mounted on the free end of said flexible member and forming seat for the inner portion of said brake beam, said flexible member When the brakes are released occupying its normal position, whereby said beam is tilted on its hangers and the upper edges of the brake shoes are positively moved away from the Wheels and When the brakes are applied said flexible member is stressed and moved out of its normal position.

In testimony whereof I hereunto affiX. my signature this 8th day of February, 1922.

ARTHUR V. HAl/YKIN'S;

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