US1016262A - Brake-shoe. - Google Patents

Description

J. D. GALLAGHER.

.BRAKE SHOE. APPLICATION FILED MAY 27, 1911.

Patented Feb. 1912.

Inventor: I a a. @1176 Atty aosnrH 1). GALLAGHER, or one RIDGE,

New JERSEY, ASSIGNOR; 'ro EDWARD H.

raiziaows, TRUSTEE, on NEW roux, N. Y.

BRAKE-SHOE Specification of Lettersraten't.

Patented Feb. 6, 1912.

a lication filed May'27, 1911. Serial No. 829,792.

To all whom it may concern:

Be it known that I, Josnrrr D. GAL- LAGI-IER, a citizen of the United States, and a resident of Glen Ridge, in the county of Essex and State of New Jersey, have made and invente d certain new and useful Improvements in Brake-Shoes, of which the following is a'specification.

My invention relates to an improvement in brake shoes, and more particularly to that kind or type thereof comprising a cast metal body and an insert embedded in the body,

whereby to produce a compound wearing face, in order to secure the wearing or lasting qualities, and at the same time the frictional or braking qualities in the shoe.

The object of my invention is to produce such, a shoe wherein the body will be made of cast iron, butof a much harder grade than heretofore used, and ,an insert, formed from wrought iron, or mild steel; such a shoe, I have found, by experiment, having a much ;}greater lengthv of life in service than shoes of this type as heretofore made, ,and at the 255,,3S- ime time possessing all the necessary frictional or braking qualities.

, transverse With these and other ends in View, the iUQDtlOIl consists in certain novel features of construction as will be hereinafter fully described and specifically pointed out in the claims,

In the accompanying drawing, Figure 1 is a View partly inside elevation, and partly broken away to show the wrought metal insert. Fig. 2 is a bottom plan view of the shoe,s showing the wearing surface thereof. Fig. 3 is a View showing a section upon a plane, indicated by the lines 3-3, of Fig. 1.

Referring to the drawings, 5 represents the body portion of the shoe, and 6 the insert embedded therein, the former being made of cast metal,, and the latter from mild steel or wrought iron; theinsert may be of any desired-. form 'or shape, but preferably that of a bar orribbon bent or doubled upon itself to form ay. plurality of, ,,segments.io r. parts extending lon itudinallypf the shoe,

and arranged edgewise with reference to the wearing face thereof. This insert may be provided with a series of holes .7, thnough which the cast metalof the body flows as-the 'metal is poured, to thereby secure a better anchorage or union between the insert and body.

The metalbody portion 5 is formed from hard cast metal, as, for example, from east llOIl having a high percentage of sulfur and silicon to impart thereto a greater degree of hardness than is usually the case in brake shoes of this character. The percentage of sulfur and of silicon employed may be varied considerably, depending largely upon the degree of hardness which it is desired to impart to the shoe. In practice, however, I have found that about 40% of sulfur, and about 1.75% of silicon will' produce satisfactory results. In the production of my improved brake shoe, the wrought metal insert is first properly bent or formed, and then placed in the mold in which the body portion of the shoe is to be cast, after which the fluid metal is poured into the mold and the insertthus embedded and securely anchored the result being that in the old type the shoe wears away much more rapidly in service than in the case of my improved shoe. By

using, however, an insert of wrought iron or mild steel, the necessary frictional qualities are imparted to the. shoe, these qualities, that is, the frictional and wearing qualities, combined in one shoe, producing an article much more economical and effective than any shoe which has heretofore been produced.

I am aware that it isnot new to constrhct a brake shoe comprising a body ofcast iron,

shodhas heretofore beenmade wherein the body has been formed from cast iron con taining a high percentage of sulfur and silicon to impart thereto a great degree of hardness, and wherein an insert has been or wrought iron, and therefore What I claim is: 1. A brake-shoe comprising combined therewith formed from mild steel fur and silicon in sufficient quantities to imparthardness to said body portion in exoess of the hardness possessed by cast. iron and an insert in the forniof aribbon formed from wrought iron and bent to provide aplurality of-se'g'ments, said ribbon being embedded in said body portion. l a

3. A brake shoe comprising a body portion formed from cast iron containing quantities of sulfur and silicon sufficient to impart hardness to said body portion in excess of the'hardness of cast iron'in which said a body portion formedfro n cast 11'011 containing sulingan insert formed from wrought metal.

, embedded therein.

4'. A b'rake shoe comprising a body ortion formed from cast iron containing su fur and silicon in suflicient quantities to impart hardness tosaid body portion in excess of the hardness possessed by cast iron alone, and an insert formed from a relatively soft metal and embedded in said body portion. 5. A brake shoe comprising a ody portion formed from cast iron containing about 4% of sulfur, andabout 1.75% of silicon, and an, insert formed from wrought iron embedded in said body portion. I I

Signed at New York, borough of Manhattan, in the county of New York, and State of New York, this th, day of May, 'A. D. 1911.

JOSEPH 1); GALLAGHER; Witnesses I :H. M. WHITE, A. V. WALSH.

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