US651435A

US651435A - Railway brake-shoe.

Info

Publication number: US651435A
Application number: US187100A
Authority: US
Inventors: Gardiner W Chipley
Original assignee: CHARLES W ARMBRUST
Current assignee: CHARLES W ARMBRUST
Priority date: 1900-01-18
Filing date: 1900-01-18
Publication date: 1900-06-12
Anticipated expiration: 1917-06-12

Description

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2 Sheets-Sheet 2- (No Model.)

NiTnD STATES lPari-nvr OFFICE.

GARDINER NV. CHIPLEY, OF CHICAGO, ILLINOIS, ASSIGNOR OF ONE-HALF TO CHARLES WV. ARMBRUST, OF SAME PLACE.

RAILWAY BRAKE-SHOE.

SPECIFICATION forming part of Letters Patent No. 651,435, dated June 12, 1900.

Application filed January 18, 1900. Serial. No. 1,871. (No model.)

T0 all whom L'v' may concern.-

Be it known that I, GARDINER W. CHIPLEY, a citizen of the United States of America, residing at Chicago, in the county of Cook, in the State of Illinois, have invented a certain new and useful Improvement in Railway Brake-Shoes, of which the following is a description, reference being had to the accompanying drawings, forming a part of this specification.

The first feature of .my invention relates to the provision of a divided or two-part brakeshoe by which certain advantages hereinafter explained are attained, and its second feature relates to the provision of a brake-shoe adapted to receive and have attached to it the back or rear portion of a partially-worn shoe, whereby partially-worn shoes may be used completely up by attaching them to and using them with new shoes, as hereinafter explained.

In the accompanying drawings, Figurel is a middle longitudinal section of a plain castiron divided brake-shoe embodying the first feature of my invention; Fig. 2, a corresponding view of a similar shoe embodying also the second feature of my invention; Fig. 3, a view corresponding to Fig. 2, showing a partially-worn shoe applied to the shoe of Fig. 2; Fig. 4, a perspective view of the two cooperating halves of a new and a partiallyworn shoe, illustrating the manner of assembling the two and securing them together; and'Fig. 5, a perspective view of the inner or middle ends of the shoes shown in Fig. 4, also illustrating the manner of assembling and securing them together.

The same letters of reference areused to indicate corresponding parts in the several views.

The two halves A B of the divided shoe (shown in Fig. l) have plain wearing-faces a of the brake-head. Both sets of lugs will be hereinafter referred to as the guide-lugs.

When the two halves A B of the shoe are placed together as in Fig. 1, their workingfaces a alie in the arc of the same circle; but the abutting ends of the two halves of the shoe are preferably so shaped as not to abut flatly together throughout their adjacent faces, an outwardly-flaring open space 6o being left between the rear portions of said faces for the purpose of more readily permitting independent movement of the two halves of the shoe when attached to the brake-head.

As is well known in the practical use of brake-shoes, the entire working face of the shoe is rarely pressed uniformly against the surface of the wheel when the brakes are set, owing to imperfect adjustments and to unequal wear upon the faces of the shoes. In 7o the use of solid or continuous shoes the shoe is practically fulcrumed upon the brake-head at its middle, where it is secured to the brakehead lby the attaching-lug and key, with the result that when in setting the brakes one end of the shoe is` forced against the wheel before its opposite end contacts with the wheel the shoe is subjected to a strain which often breaks it after it has become worn and weakened. By forming the shoe in two separate 8o halves, as in Fig. l, and permitting slight independent play of the two halves this objection to solid or continuous shoes is overcome, since the forcing of one half of the shoe against the wheel in advance of the other pro- 8 5 duces no strain upon the shoe.

Another' advantage of the divided shoe is that when one half of the shoe becomes worn to a materially greater extent than the other,

vas Very frequently happens in theuse of 9o brake-shoes, such worn half may be removed and replaced by another less-worn half, thereby restoring the uniformity of the two halves of the shoe.

Fig. 2 and the succeeding figures of the 95 drawings illustrate the second feature of my invention. As there shown, the two halves A B of the shoe are provided at their abutting ends with a recess c, extending inward from the face of the shoe opposite the attachroo ing-lug C on the back of the shoe, and projecting into each side of such recess from the respective halves of the shoe are two lugs d. This recess c is adapted to receive the attachinglug C upon the back of a worn shoe, Fig. 3, and the lugs il are adapted to enter the keyway in such attaching-lug, and thereby lock the worn shoe to the newoue. The two halves of the shoe are likewise provided near their outer ends with recesses e, extending inward from the face of the shoe and adapted to receive the guide-lugs D E upon the back ot' the worn shoe, as shown in Fig. 3, and for the purpose of locking the ends ot' the worn shoe to the ends of the new shoe the lugs E upon the back of the shoe are provided upon their outer faces with recesses f, adapted to be engaged by lugs g, projecting into the recesses c in the face of the shoe.

The back of the shoe is formed in an are having the same radius as that of the face of the shoe, so that the back ot' one shoe will lit the face ot another shoe.

In assembling the parts each half ot' the worn shoe is applied to and interlocked with the corresponding half of the new shoe independently of the opposite halves of the shoes, and when each halt' of the combined shoe has been thus assembled the two halves of the combined shoe are brought together end to end, as in lFig. 3, and then secured to the brake-head.

Figs'. 4 and 5 illustrate the manner oi combining the respective halves of the new and old shoes, the face ot the new shoe and its recesses and the back of the old shoe with its projecting lugs being shown in Fig. 4:. The back of the old shoe is placed against the face of the new shoe, with the attaching and guiding lugs in their recesses in the face of the new shoe, but with the outer end of the new shoe projecting outwardly slightly beyond the end of the old shoe, and the latter is then slid outwardly along the face of the new shoe to cause the lugs g and CZ in the recesses in the face of the new shoe to engage the recess f and keyway b in the lugs upon the back of the old shoe, and thereby lock the latter to the former, as will be readily understood.

A worn shoe of the style shown in Fig. l may be combined with a new shoe of the style shown in Fig. 2 as readily as can a worn sh'oe of the latter style, and in Fig. 3 it may be assumed that the worn shoe there shown is, in fact, the shoe of Fig. 1. Indeed, owing to the fact that the shoe of Fig. l has an unbroken wearing-surface it will under some circumstances be found advantageous to einploy the two styles of shoes together, the shoe of Fig. 2 serving as a means for completely using up the worn shoes of the style shown in Fig. l.

While I have illustrated and described in detail a simple and efiicient method ot' attaching the worn shoes to the new ones by interlocking them together, my invention is not restricted in its broader scope to this particular method and means oi' attaching the old shoe to the new one, since, so far as I am aware, it has not heretofore been proposed to use up worn brake-shoes by attaching them to new shoes in any manner whatsoever, and my invention therefore contemplates the employment of any suitable means for securing the old shoes to the new ones in the practical utilization of this idea.

It will be understood that my invention has nothing to do with the particular construction of the body of the shoei'. c., whether of solid cast metal or otherwise-or with the employment or non-employment of inserts in the wearing-face of the shoe. Any of the various methods of constructing the body of the shoe and any of the usual inserts may be employed in connection with my invention without affecting the latter. It will also be understood that the second feature of my invention may be utilized in solid or continuous shoes, it being simply necessary for such purpose to provide suitable means for securing the old and new shoes together when assembled.

I'Iaving thus fully described my invention, I claiml. A brake-shoe composed ot' two independent halves abutting together on a transverse line at the middle of the shoe and each provided with means forattaching it to the brakehead, substantially as described.

2. A brake-shoe composed of two independent halves separated from each other on a transverse line at the middle of the shoe and each provided with a guiding-lug and with one-half of a two-part attaching-lug, subtantially as described.

The herein'- described divided brakeshoe, composed of the two halves A B separated from each other on a transverse line at the middle of the shoe and each provided with a guiding-lug D E and with one-halt of a two-part attaching-lug C having a keyway ZJ, substantially as described.

4. A brake-shoe provided in its wearingface with recesses adapted to receive the attaching and guide lugs upon the back of another shoe, substantially as described.

5. A brake-shoe provided in its wearingface with recesses adapted to receive the guide and attaching lugs on the back of another shoe, and with means for securing the two shoes together, substantially as described.

6. A brake-shoe having its wearing-face and its back formed in parallel planes, so that the back of one shoe will fit the face of another shoe, and provided in its wearing-face ,with recesses adapted to receive the attaching and guide lugs upon the back of another shoe, substantially as described.

'7. A two-part or divided brake-shoe, composed of two halves separated transversely at the middle of the shoe, and adapted to have the back of another shoe secured to its face, substantially as described.

8. A two-part or divided brake-shoe, composed oi two halves separated upon a trans- IOO IIO

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verse middle line, and provided in its Wearing-face with recesses adapted to receive the attaching and guide lugs upon the back of another shoe, substantially7 as described.

9. A two-part or divided brake-shoe, composed of twophalves separated upon a transverse middle line, and provided .in its Wearing-face with recesses adapted to receive the attaching and guide lugs upon the back of another shoe and with means for securing the two shoes together, substantially as described.

10. A two-part or divided brake-shoe, composed of tWo halves separated upon'atransverse middle line, and provided with recesses in its wearing-face adapted to receive the attaching and guide lugs upon the back of another shoe, and with lugs projectinginto said recesses and adapted to cooperate with the lugs upon the back of the other shoe to lock the two shoes together, substantially as described.

11. A two-part or divided brake-shoe separated upon a transverse middle line and having its wearing-face and back formed in parallel planes, so that the back of one shoe will lit the face of another shoe, and having its- Wearing-face provided with recesses adapted to receive the attaching and guide lugs upon the back of the other shoe, substantially as described.

12. A two-part or divided brake-shoe separated upon a transverse middle line andhaving its wearing-face and back formed in parallel planes, so that the back of one shoe will t the face of another shoe, and having its Wearing-face provided with recesses adapted to receive the attaching and guide lugs upon the back of the other shoe and with lugs projecting into such recesses and adapted to c0- operate with the attaching and guide lugs upon the back of the other shoe, substantially 13. The herein -described two-part or divided brake-shoe, composed of the halves A B provided in their wearing-faces With the recesses c e and the lugs d g projecting into said recesses, and provided -upon their-.backs With the attaching-lug G having the keyway b, and with the guide-lugs D E having the recesses f, substantially as and for the purpose specilied.

14. A brake-shoe adapted to engage a wheel and composed of two independent substantially-like halves abutting together on a trans'- verse line at the middle of the shoe, substantially as described.

GARDINER W. CHIPLEY.

Witnesses: y

LEoNoRA WISEMAN,

EDWARD RECTOR.