US1390846A - Brake shoe and head - Google Patents

Description

C. I. WALKER.

BRAKE SHOE AND HEAD.

APPLICATIONJILED JUNE 1, 1920.

Patented Sept 13, 1921.

WITNESS INVEN'IORv W166 IWalker hi4 ATTORNEYS UNITED STATES cnannns I. WALKER, or slut rnaivcisco, CALIFORNIA.

BRAKE sHoE Ann HEAD.

Specification of Letters Patent. Patented Sept. 13,1921,

Apfllitiation filed 'Iune 1, 1920. Serial No. 385,521.

To allr'whomit may concern:

Be it knownthat LCHARLES I. WALKER, a citizen of the United States,-and a resident of the cit and county of San Francisco, State of California, have invented a certain new and useful Brake Shoe and Head, of which the following is a specification.

This invention relates to railway car brakes and more particularly to a combined shoe and head.

Certain types of brake shoes have their backs rabbeted and formed with upper transverse shoulders against which, bear an applied head. When first applied to the shoe, the head seats firmly on the shoulders and the shoe has but little lateral play but, as the shoulders wear, the play increases to a considerable and undesirable amount.

It is an object of the resent invention to eliminate this undesirab e play as the parts wear. Another object is to provide a reliable, effective and substantial means for interlocking the shoe and the head against undue lay. A further object is to provide an interlocking means of extremely simple, and readily applied and removed, parts each comparatively light and small. a

The invention possesses other objects and features of advantage, some of which, with the foregoing, will be made manifest in the following description of the preferred form of the invention which is illustrated in the drawings accompanying and forming part of the specification. It is to be understood that it is not intended to limit the invention to the embodiment shown by the said drawings and description as variations may be adopted Within the scope of the invention as set forth in the claims.

Referring to the drawings:

Figure 1 is a side elevation of the assembled device.

Fig. 2 is a cross-section on line 2--2 of Fi 1.

ig. 3 is a section on line 3-3, of Fig. 1.

Fig. 4 is a perspective of the shoe.

The improved structure includes a brake shoe having, seated on its back, a substantial head which is removably inned thereto; the pin being interlocked wit a retainer or clip operative to restrain the shoe from having undue oscillating lay toward and from the flange of a whee on which the brake ma be mounted. A

n the preferred form of the invention a brake shoe 2 is provided with a medial, rear lug 3 having an eye or aperturea longitudinally concentric with the curvature of the shoe body. Theback of the shoe is rabbeted or otherwise shaped to provide transverse shoulders 5-5 nearthe ends and against these abut the contiguous cndsof a substantial parttermed the head 6,v which is attachable to the brake operating mechanism by any suitable means.

The face of the head that is applied to the shoe has a medial pocket 7 to take the lug 3 and is also provided with cavities 8-8 from which extend the ends 9-9 engaging the shoulders 5-5.

Between the pocket 7 and the cavities are bearing lugs 10-10 on the head 6, and these lugs and the ends 9-9 are perforated in a line, as at 11--12-13 and ltand in register With the eye 4 0f the lug 3. The eye is elongated transversely of the lug and through it and the holes 11-12-13 and 14 is passed a key or in 15 that is preferably tapered. Preferably the pin 15 has a loose fit in the eye 4 of the lug 3.

Such means here is in the form of a simple hooklike clip of substantial structure and material, as a casting or forging. The pin is of rectangular form in cross section and the clip has a body 16 of L-shape form edgewise, one arm 17 of which has a returned hook 18 spaced from the arm so as to be passed across, or receive, the pin 15, the arm 19 of the body bearing on the outer edgeof the shoe, i. 6., the edge remote from the flange of a wheel W, shown in dotted line in Fig. 2. The clip is disposed in the upper cavity 8 of the head and when in place against the in 15 holds the shoe against unwonted si e play. The clip may be readily formed of flat stock forged to the desired longitudinal shape, is readily applied and is retained by the pin against loss from the or anized structure.

he hook 18 may be struck down over the side of the pin to bind it.

I claim:

1. A combined wheelbrake shoe and shoehead, means for pivotally interlocking the shoe and head and an attachment for limiting lateral relative movement of the shoe.

2. A combined wheel-brake shoe and shoe head mutually interlocked, and means for pinning the same together and providing relative lateral movement and means connectible to the pin for limiting said movement in one direction.

3. Aconlbined wheel-brake shoe and shoe head mutually interlocked, and means for pinning the same together and providing relative lateral movement and a clip hung on the pin for limiting said movement in one direction namely, away from the flange of a Wheel 011 which the brake is applicable. 7

4. A combined, mutually interlocked brake shoe and head, and a pin passed through the same on a longitudinal line of the parts and a clip engaging the pin to restrain-movement of the shoe in one direction.

.5. A combined, mutually interlocked brake shoe and head, and a pin passed through the same on a longitudinal line of the parts and means engaging the pin to restrain motion 01" the shoe in one direction, said means including a clip with a hook adapted to straddle the pin and having an arm to reach around one side of the shoe.

6. A brake shoe and a head mutually interengaged therewith, the head having a pocket in its face toward the shoe, an apertured lug on the back of the shoe and enterin the pocket, a pin extending longitudina ly in the head and through the lug and a clip engaging the pin and having a tongue bearing against the side surface of the shoe. In testimony whereof I have hereunto set 111 hand.

y CHARLES I. WALKER.

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