US787092A - Method of making brake-shoes. - Google Patents

Description

No. 787,092. PATBNTED APR. l1, 1905. J. D. GALLAGHBR.

METHOD OP MAKING BRAKE SHOES.

APPLICATION FILED FEB. 24.1903.

i Zigi Patented April 11, 1905.

UNTTBD STATES PATENT @mien JOSEPH DOUGLAS GALLAGHER, OF GLNRIDGE, NIY JERSEY.

METHOD OF MAKING BRAKE-SHOES.

SPECIFICATION forming part of Letters Patent No. 787,092, dated April 11, 1905.

Application filed February 24, 1903. Serial No. 144,742.

Be it known that l, J'osnrn DoUeLAs (lai.- nwnnn. a citizen of the United States of America, residing at(llenridge` in the county of llssex and State of New Jersey` have invented a certain new and improved Method of Making Brake-Shoes, of which the following is a speeilieation.

My invention relates to the art of making hralu-shoes1 and it has for its principal ohject` to render availahle for use. and to use, the nnworn portion or hack part of a discarded hrake shoe, hy certain provisions for lixing upon this discarded part a new \\'earing sole. A further ohjeet of the invention is to provide means for attzulnnent of a separately cast sole of such form that the natural wear of the shoeshall expose the retainingdevices of the sole, so that the fragments may he removed` and a new sole may he cast on, as hereinafter set forth.

'lhese ohjects, as well as other advantages which may hereinafter appear, l attain hy the preferred mode of operation illustrated in preferred forni in the accompanying drawings, whereinw Figure l is a longitudinal section of a complete shoe along' the line v// of Fig. 3.

Figure 2 is a cross section on line .1 .1^ of Figure 1.

Figure I), is a plan view.

Figure i is a longitudinal central section, on line in Figure 5 of a modilied form of the shoe, wherein is used a dii'erent kind of retainii'ig device for the wearing sole.

Figure 5 is a plan view of the same.

Figure l1 is a perspective and section showing another form of retaining device for the sole.

Figure T illustrates still another mode of attaching the sole of the shoe to the hack of the hody, the view heilig' a section.

As is clear from the nature of their use. hrake shoes very rapidly wear out. and when worn down to a Certain thickness, differing in .lilierent styles of shoes` the remaining unworn portion is usually thrown into the scrap heap and sold hy the railroads as old iron at a price milch lower than the price per pound naid for new shoes. This loss amounts to very large sums in the course of a year; and it is much greater where the improved steel hacked shoes are, used, as the hacks are the most expensive parts and there hasl hereto- Yfore heen no means of using them over again.

1t has heen the. constant endeavor of the manufacturers and railroads to avoid or minimixe this loss of scrap shoes, and various plans for overcoming' the diiliculty have heen devised, with little success. Thus, inserts of harder metal have heen putin gray iron shoes, and shoes have heen chilled in sections of their faces, for the purpose. of retarding the wear. Also, hy providing re-inforcml shoe hodies with steel hacks the shoe could he allowed to wear down to a thinner section, reducing the weight of the wastescrap ahout one half. Again, attempts have heen made to place partly worn shoes on the face of the new shoes for the purpose of entirely wearing down the old one. All these methods have failed to fully meet the tronhle and save the unworn portions.

)ly ohject to fully overcome the dillienlty, and this l do hy providing for wearing only the sole of the shoe and thereupon snpplying the shoe with a new wearing sole. l may proceed in several ways Vreither hy taking a worn shoe and hoi-ing holes in it and then placing in a mold and casting a new face on it, the metal flowing through the holes; or hy casting on the smooth face of the old shoe, hy providing a run-ont in the mold hy which the metal tlows over thesurface until it is melted so that the new metal welds with the old; or l may cut dove-tailed grooves in the face of the old shoe and casta new sole. thereon, when it is held in place hy the metal running into the grooves.

lint for economic reasons l generally piefer to so form the hody of the shoe originally as to allow of readily re-soling. Thus, the hody of the hrake shoe., marked H in the drawings, may he lirst made separately and provided with retaining devices, such as the recessed lugs 9 in l `igures1 and 2 or the perforations la in Figures lr and 5 or the recessed hody l?) in Figure (l. 'lhe hody H is then placed in a mold and the metal to form the sole 13 is cast thereon, when it is held irmly in place by the aforesaid retaining devices. The shoe being now allowed to wear on the wheel till it is ground to the line'of retaining devices, they become free and allow of easily removing the end fragments 18 and the fragments between the lugs. For the purpose of rendering it easy to knock out the parts, the sides of the lugs (seeFigure 1) are preferably made divergent from each other. rlhe body is then placedy in a mold and a new face or sole 13 is cast thereon, as originally. Thus the same body may be used over and over indefinitely with continuously renewed wearing soles.

The modified form shown in Figures 4 and 5 is moreespecially adapted to utilize the unused and discarded portions of the ordinary shoe already in use at the present time. The perforations 14 being' provided, the procedure is as above set forth, the metal of the cast face entering the perforations 14 and the spaces 15 in the steel back, forming heads therein with retaining' shanks 14a as shown.

In the design shown in Figures 1 and 3 the metal of the sole is introduced into anotch 16 at the ends of the body, and the lugs 9 extend entirely across the face of the shoe. This is in order to prevent sidewise displacement of the sole 13 and yet make easy the removal of the fragments when the retaining' lugs become exposed. But any other means of attaching thc separately cast sole may be used, as long as said means are caused by the natural wear to become ready for casting on a new sole.

In the form of Figure 6 the face of the body portion has one large recessed lug 19 and when it is exposed by wear the fragmentary rim portion may be easily broken off; while Figure 7 shows a sole 13a welded to the body 8.

The specific means of attaching the separate sole of the shoe may be varied as circumstances require, the essential thing in my process being the provision of a shoe in two parts of which the sole part only is to be worn and the body part is thereupon to be provided with a new wearing sole; and this may be done either by welding on the sole or by casting it on a retaining form. rfhe articles herein shown and described I do not claim herein, but the same form the subject matter of my co-pending application No. 144,743, (Patent No. 747,912) iiled of even date herewith, for brake shoes.

It will be understood that my invention is as well adapted to re-using the discarded portions of the brake shoes at present in use as to the original ,making of the shoes with ,retaining deviceshthe invention covering broadly the re-soling of brake shoes after the manner set forth.

Having thus described my invention and several preferred modes o f carrying it into practice, what I claim, and desire to secure by Letters Patent, is the following:

1. rlhe method of making brake shoes consisting in preparing a body portion and casting thereon a separate wearing sole, substantially as described.

2. The method of making brake shoes consisting in providing a body portion with retaining devices and casting thereon a separate wearing sole.

3. The method of making brake shoes which consists in providing a body portion consisting of a brake shoe partly worn in service, with retaining devices, and casting thereon a separate wearing sole.

4. r1`he method of making brake shoes with renewable soles which consists in providinga rear body portion thereof with retaining devices designed to be exposed by wear of the sole, placing` said body portion in a mold and separately casting a wearing sole thereon.

5. The method of refacing worn brake shoes which consists in providing the rear portion of the shoe with retaining devices, exposed by the wearing olil of the sole, placing said body portion in a mold and casting thereon a new wearing sole.

6. The method of refacing worn shoes which consists in forming the body portion of the shoe with recessed lugs, allowing them to be exposed by wear of the sole, placing said body portion in a mold and casting thereon a new wearing sole which is held in place by said lugs, substantially as described.

1n testimony whereof 1 have hereunto signed my name in the presence of two subscribed witnesses.

JOSEPH DOUGLAS GALLAGHER. lVitnesses:

WARREN L. JAcoBUs, A. E. CUMMING.

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