US 1017015 A
Description (OCR text may contain errors)
J. T. PERKINS. BRAKE SHOE.
APPLICATION FILED DEC. 1o, 1910.
l01'7,015 Patnted Feb. 13, 1912 lllhlltylll@ PATENT FFRCE.
JAMES T. PERKINS, OF CEDARTOWN, GEORGIA, ASSIGNOR OF ONE-HALF TO WILLAIVI R. G-OLSAN, OF CEDARTOWN, GEORGIA.
Specicaton of Letters E'atent.
Patented Feb. 13, 1912.
Application filed -December 101910. Serial No. 596,689
To all whom "it may concern."
Be it known that l', JAMES T. PERKINS, a citizen of the United States, residing at Cedartown, in the county of Pol k and ,State ol" Georgia, have invented a new and useful Brake-Shoe, of which the following is a specification.
It is the object of the present invention to provide an im provedbrake shoe designed chiefly for use on locomotives, railway coaches, freight cars, street cars, and the like.
One aim of the present invention is to provide a brake shoe having, in its wheel contacting` tace', pockets to receive and contain a lubricant to be applied to the wheel flange and thereby prevent` to a consider'- able degree, wear ot the flange and rail, when traveling against the rail, and t'o prevent the flange 4climbing the rail thereby causing derailment ot the car orA locomotive. ln this connection, the invention `contemplates' forming the brake shoe with pockets having a constricted mouth, the pockets being packed or filled with a normally hard lubricant adapted to spread onto the wheel flange through contact ot the shoe with the wheel as the metal of shoe wears away.
ln the accompanying drawing Figure l is a perspective view of a brake shoe constructed in accordance with the present invention. Fig. 2 is a transverse sectional view through the shoe and a portion ot the wheel with which it cooperates. Fig. 3 is a longitudinal sectional view through a portion of the shoe, on the line 3 3 of Fig. 2 looking in the direction indicated by the arrow. j
In the drawings and particularly in Fig. 2 thereof there is shown a portion of a wheel. indicated by the reference character W. The wheel tread is shown at 4 and the flange of the wheel is indicated bythe reference' numeral 5. The brake shoe is illustrated as comprising a body 6 formed with the usual lug 7 to which is attached the brake beam for operating the brake shoe. The body 6 of the brake shoe has the usual working face 3 and is formed at one side edge with a flange 8 having a faee-9 which is of ogee form and is designed to bear against .the
face of the flange of the wheel. This flange 8 of the brake shoe is formed in its face which contacts with the flange of the wheel,
with pockets 10 which are enlarged inwardly or in other words have constricted mouths 1l. The mouth 11 of each pocket extends transversely across the said contacting tace of the flange S and these pockets are arranged one abovethe other throughout the height of, the shoe as illustrated' in F ig. l of the drawing. lt will be observed that the pockets are of greater leiigth at their bottom than at 'their constricted mouths and that also they are of greater width at their bottoms than-at their mouths.
ln using the brake shoe embodying the present invention and above specilically described, a normally hard lubricant is packed lintel the pockets until they are lilled. rlhe shoe then mounted in the usual manner and its faceV 3 contacts with the tread Il or peripheral surface of the wheel while 'the 'inclined face i) of the flange 8 contacts with the inner face ot they flange 5 of the wheel. llowever, it will be noted that the Contact ot the main part of the brake shoe'with the tread of the wheel is direct, whereas when the. shoe is moved. in a direction to bring about this positive or direct Contact, the
flange S moves in Aa direction which is' oblique to the contact between its surface 9 and the inner edge oi the lange 5 of the wheel. 'This will result in the application or pressure to the tread of the wheel but only the production of a Contact between the flanges of the brake shoe and the wheel. lt will be obvious that if the line of Contact between the two `flanges included those points wheiie friction occurs during braking action, the material of the brake shoe between the mouths ll would be rapidly worn away. The contact of the wheel liange with the -lange of the brake shoe will serve to lubricate the wheel ange as the metal of the shoe wears away, the lubricantcoming in contact with the wheel flange only as ,this is done.
" What claimed is:
A brake shoe having a smooth imperferate working face and a flange along one" side of the shoe. said flange having a curved work ing-face adapted to contact with the flange ico of a wheel and having a plurality of non` In testimony that claim the foregoing communicating lubricant holding pockets as my Own, I have hereto aiXed my signaeXtending inwardly from said curved face ture in the presence of two witnesses.
and adapted to be closed by the wheel flange, JAMES T. PERKINS. all of the Walls of each pocket converging Witnesses: inwardly along straight lines from the W. A. CALHOUN,
curved open end of the pocket. J. E. DEMPSEY.