US385966A - Brake-shoe - Google Patents

Description

(No Model.)

P. L. SHEPPARD.

'BRAKE' SHOE.

' Patente dJuly10,1888. Y

S Altoona, county of Blair, State of Pennsylva I tread sothat the action of the brakes will tend edge of the wh'eel-face-and serve to keep the UNrran STATES PATENT, OFFIC FRANR. L. SHEPPARD, OF ALTOONA, PENNSYLVANIA.

BRAKE- SHOE.

SPEGIFICATIQN forming part of Letters Patent No. 385,966, dated July 10, 1888.

Application filtd August .24, i887.

To all whom, it may concern: v

Be it known that I, FRANK L. SHEPPARD, of

nia, and a citizen of the United States, have invented a new and useful Improvement in BrakeShoes, of which the following is atrue and exact description, reference being had to lheaccoinpanying drawings, which form a part of this specification.

My inv ention relates particularly to the construction of brake-shoes for use upon locomotive and car wheels, and has for its object to improve the efficiency and cheapen .the cost of vsuchbrake-shoe.

Heretoi'ore brake shoes have been constructed in various shapes audmade either of wrought-iron or east'iron. Among the shoes which I believe to be most useful in practice are those which are hollowed out so as to clear the portions of the wheel which come in contact with the rail, such shoes having the friction-faces on each side of this portion of the to wear the outer portions of the wheel-face to the same level as itscenter. I have also found that the device of providing the brake-shoe with flanges which project inward along the shoein a definite position is extremely useful. The only defects which these shoes have is due to the character of the metal of which they are made, the wrought-iron being costly and difficult to make in correct form, while the castiron, which has been generally used, is neither strong nor durable enough. I have discovered that shoes of the. kind indicated can be formed of cast-steel of the character technically known as mild steel, and that such brake-shoes are cheap, strong, and more uniformly efficient and durable than any that have been heretofore tried.

The accompanying drawings will serve to face being recessed or Serial No. 247,725. (No model.)

illustrate my invention, in said drawings Figure 1 being a side elevation of a locomotivehaving brake-shoesapplied to its drivers of the kind to which my invention relates. Fig. 2 is an enlarged side elevation of the rim of one of the drivers with brake-shoe in place, and Fig. 3 is a section through the rim and shoe on the line as a: of Fig. 2.

A is a locomotive; B, a plainfaced drivingwheel; B B, ordinary flanged driving-wheels; O, a brake-shoe having inward along the edges of the driver and having. its central face, 0, cut away, so as not to come in'contact with theportion b of the tire which ordinarily rests upon the track..

The brake-shoe shown in in itself. new, having been patented to me on January 4,1887, by Letters Patent No. 355,477, and my invention would also apply to shore usedwith flanged wheels-such, for instance, as are shown in the Ross-patent, No; 292,861, of February 5, 1884; but my present invention rests on m discovery of the peculiar fit ness of mild cast-steel as a material to be employed for the manufacture of such brakeshoes.

Having now described my invention, what- -I claim as new, and desire to secure by Letters Patent, is-

As a new article of manufacture, a brakeshoefor use with locomotive and car wheels, having a surface corresponding in outline with the face of the wheel, the center of said surcut away, and having a flange or flanges projecting inward along the edgeof the wheel, the said shoe being formed of a single casting of mild steel,all substantially'a's and for the purpose specified. FRANK L. SHEPPARD.

Witnesses: p

W. D. Cocoa,

W. E. BLANCHARD.

the drawings is not flanges c 0 extending

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