US577506A - Marshall j - Google Patents

Description

Invezzfor //wfd Miva gy (No Modem M. J. BRUNDAGE.

BRAKE SHOE. a

Nol 577,506. Patented Feb. 23, 1897*.

wiz/7165565 NiTn STATES MARSHALL J. BRUNDAGE, OF NORTH SAN JUAN, CALIFORNIA, ASSIGNOR OF ONE-FOURTH TO CHARLES S. PAINE, OF SAME PLACE.

BRAKE-SHOE.

SPECIFICATION forming part of Letters Patent No. 577,506, dated February 23, 1897.

Application filed August 10, 1896. Serial No. 602,249. (No model.)

T0 all whom, it may concern:

Be it known that I, MARSHALL J. BRUN- DAGE, a citizen of the United States, residing at North San Juan, in the county of Nevada and State of California, have invented certain new and useful Improvements in Brake- Shoes; and I do declare the following to be a full, clear, and eXact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to improvements in brake-blocks; and it has for its general object to provide a cheap and simple brakeblock adapted to be quickly and easily secured upon an ordinary brake-beam, and one which is so constructed that the shoe or part which engages a wheel and is subjected to frictional wear may be readily removed from the block and replaced by a new one, and this without the necessity of removing the block from the brake-beam.

Other objects and advantages of the invention will be fully understood from the following description and claims when taken in conjunction with the accompanying drawings, in which- Figure 1 is a detail side elevation illustrating my improved block on a brake-beam and in its proper relation to a wheel. Fig. 2 is a horizontal section of the same. Fig. 3 comprises disconnected perspective views of the block and the shoe. Fig. 4 is a perspective view of one-half of the block, and Fig. 5 is a perspective view of a modification.

In the said drawings similar numerals designate corresponding parts in all of the views, referring to which- 1 indicates a portion of a vehicle-wheel. 2 indicates a brake-beam which is arranged in advance of the wheel and is designed to be moved toward or from the same through the medium of the ordinary or any suitable mechanism, and 3 indicates my improved brakeblock, which is connected with the beam 2 in a manner presently described. This block 3 is preferably formed of cast metal and hollow, as shown, and it comprises the two sections or halves 4. The said sections or halves 4 each have an outer side wall 32L and inwardlydirected lateral walls 3b 3, forming an inclosure 3d, and they are each provided with an inwardly-directed annular portion 5, designed to form a sleeve 6, as shown in Fig. 2, and are also each provided with a dowel 7, designed to take into a socket 8 of the other, so as to hold the sections against movement with respect to each other, the said annular portions 5 and sockets 8 being arranged within the inclosures 3 and of a length corresponding to the width of the walls 3l 3, and the dowels being of a greater length than the width of said walls, as shown. The` sections 4 are furthermore provided in their sides or edges with recesses formed by the side walls 3a and lateral walls 3b, as shown, which when the sections are secured together in proper relation form a recess 9 of dovetail form in cross-section. This recess 9 is open at its upper end and closed at its lower end by the ledge-pieces 10, which are integral with the sections 4, and said recess is designed and adapted to receive the brake-shoe 11, which is preferably of wood, and is designed to be inserted at the upper end of the recess and rest upon the ledgelO at the lower end of said recess.

The brake-shoe l1 is preferably formed of soft wood and is so cut that the end of the grain of the wood will be presented to the wheel-tire, so as to prolong the usefulness of the shoe, and it is designed and adapted to be secured against casual upward movement in the recess 9 by the serrations 12 on the side walls of said recess. The said shoe 11 may also be secured, when desired, by screws 13 passed through aperturesin the halves 4 and into the shoe, as shown.

The brake-block 3 is secured upon a shank or bolt 14, which is passed through the sleeve 6, by a nut 15, and it will therefore be seen lthat when the shoe 11 has been rendered useless by frictional wear and it is desired to remove it it is simply necessary to loosen the nut 15 and move the block-sections 4 slightly apart, when the shoe may be readily lifted from the recess 9 and a new shoe inserted and secured in the manner described. In this way it will be seen that the usefulness of the brakeblock as a whole may be prolonged for an indefinite period of time, as the shoe 11 is the only part subjected to wear and may, as described, be readily removed and replaced by a new one.

IOO

4The brake-block maybe connected with the beam 2 in any suitable manner. I prefer, however, to effect such connection by the cheek-plates 16,which are pivotally connected with the beam 2 by bolts, as 17, and are arranged upon opposite sides of the block 3 and are preferably provided with projections upon their inner sides to take into the recesses in the outer sides of the block-sections, as shown. The eheeloplates 1G receive the bolt 14, as shown, and when it is desired to remove a worn shoe 11 it is simply necessary to loosen the nut 15 and then swing one or both of the plates 1G outwardly, when the block-sections may be moved slightly apart for the purpose described. From this it will be seen that it is necessary to pivot but one of the cheekplates 16, and therefore the other may be fixedly connected with the beam, if desired.

\Vhile I have described it as preferable to out the shoe 11 so that the end of the grain of the wood will be presented to the wood, I do not desire to be understood as confining myself to the same, as the wood may be cut in any suitable manner.

It will be seen from the foregoing that with all its advantages my improved brake-block is very cheap and simple,'is strong and durable, and is no more likely to get out of order than the ordinary brake-block, which is an important advantage.

In Fig. 5 of the drawings I have illustrated the manner of connecting my improved block 3 to a bent iron brake-beam 2, the sections of the block being secured upon the beam by a nut placed on the threaded end of the beam, as illustrated.

Having described my invention, what I claim is 1. The brake-block comprising the two hollow sections having the outer side walls, the

inwardly-directed lateral walls 3b, 3C, forming an inclosure, dowels and sockets to receive the dowels arranged within said inclosures, and transverse apertures to receive a connecting device, and provided in its forward side with a recess of dovetail form in crosssection said recess being formed by the side walls and walls 3", a ledge at the lower end of said recess, and serrations on the inner side of the side walls of the recess, a shoe of dovetail form in cross-section arranged in the dovetail recess of the block and resting on the ledge thereof, and a connecting device extending through the transverse apertures of the sections, substantially as and for the purpose set forth.

2. The combination of a brake-beam, a spindle carried by the brake-beam and having a threaded end and a nut thereon, a brakebloek secured on the spindle by the nut and comprisin g the two hollow sections having the outer side walls, the inwardly-directed lateral walls 3, 8, forming an inclosure, dowels and sockets to receive the dowels arranged within said inclosures, and transverse apertures receiving the spindle, and provided in its forward side with a recess of dovetail form in cross-section; said recess being formed by the side walls and. walls 3b, a ledge at the lower end of said recess, and serrations on the inner side of the side walls of the recess, and a shoe of dovetail form in cross-section arranged in the dovetail recess of the block and resting on the ledge thereof, substantially as specified.

In testimony whereof I affix my signature in presence of two witnesses.

MARSHALL J. BRUNDAGE.

Vitnesses:

S. M, GRALL, F. 1V. BANK.

Images