US689496A - Brake-shoe. - Google Patents

Description

No. 689,496. Patented Dec. 24, |90l.

H. JONES.

' AKE SHOE.

(App 'ca ion led June 20, 1901.)

(llo Model.)

Tn: mams Pinzas ma4 Puomnwo., wAsmNrnoN n c To all whom it may concern:

lview of the steel-back before its insertion in Airon is poured, as hereinafter set forth. To

la soft-steel wearing-piece b and arrange it UNITED .STATES PATENT OEEICE.

HARRY JONES, OF BLOOMFIELD, NEWJERSEY, ASSIGNOR TO THE LAPPIN BRAKE-SHOE COMPANY, OF BLOOMFIELD, NEW JERSEY, A CORPORAT TION OF NEW JERSEY.

BRAKE- SHOE.

SPECIFICATION forming part of Letters Patent No. 689,496, dated December 24, 1901.

Application tiled June 20, 1901.

Be it knownthat I, HARRY JONES, a citi- 'zen of the United States, residing at Bloomfield, in the county of Essex and State of New Jersey, have invented certain new and useful Improvements in Brake-Shoes, of which the following is a specification.

l This invention relates to that class of brakeshoes which are formed of two or more metals, and particularly to the means for backing such sh'oes s'o as to preserve their efficiency 'and integrity as long as possible, all of which will more fully hereinafter appear.

The principal object of the invention is to provide a simple, economical, and efficient brake-shoe; and the invention consists in the features, combinations, and details of construction hereinafter described and claimed.

In the accompanying drawings, Figure lis a perspective View of a brakeshoe constructed in accordance with these improvements looking at it from the back; Fig. 2,`a similar the shoe; Fig. 3, a perspective view of the shoe looking at it from the front or wearing surface, and Fig. 4an enlarged cross-sectional view taken on line 4 of Fig. 3.

In the art to which this invention relates it is well known thatv it is desirable to get the greatest efficiency possible out of a shoe and also to maintain its integrity or life as long as possible, without regard to whether the Wearing parts remain integral or become broken. The principal object, thereforeof this invention is to provide a shoe having the above advantages, all of which will be more fully hereinafter set forth.

In constructing a shoe in accordance with these improvements I take a steel back a of the desired size, shape, and strength to preserve the integrity of the shoe as long as possible and` place this back in a mold, around and in contact with which the molten castprovide for the Wearing-surface, I irst take diagonal of the mold. This steel piece, as

shown in Fig. 4, is provided with a longitunal groove on each side, andthe ends (not shown) are dovetailed, so that when the cast- Serial No. 65,267. (No model.)

iron is poured around the same, as shown in Fig. 4, the insert is cast firmly in engagement with the rest of the shoe. This insert is placed in the mold sol as to leave a space of about a quarter of an inch between it and the steel back a, as shown particularly in Fig. 4, the result being that when the castiron is poured into the mold it fiows into and lls such space. When cooled, this cast metal assists in providing a very efficient shoe in that the portion of the iron d at the wearing-surface is of the desired Vdensity to provide a braking-surface, and that portion of the metal at e between the steel back and the soft-metal insert becomes still denser or harder, though not chilled, and it also proy vides for the longer wearing of the shoe.

As shown in Fig. 1, the steel back is eX- posed partly, though covered and locked in engagement with the rest of the shoe by means of the projections fat the ends of the shoe and the attaching-lug g, while in`Figs. 3 and 4 the soft-metal insert is shown as diagonally ar ranged in the face of the shoe and also exposed to provide a compound wearing-surface. Fig. -2 also shows that the steel back has a peculiar shape-that is, concavo convexand provided with elongated slots or perforations h and notches or grooves r', midway of the shoe and cach lateral edge thereof, all for the purpose of permitting the shoe to become firmly engaged with the cast metal.

The principal advantage incident to the use of a shoe constructed in accordance with these improvements is that the metal c between the soft-metal insert and steel back does not chill, but becomes harder and more brittle than the rest of the cast metal in the shoe and is apparently a very dense iron caused by the close juxtaposition of the cold insert and back between which it lies, the practical effect being that the shoe is ybetter adapted for braking purposes and the wear-resisting qualities of the insert b are in a measure transmitted to it, so that the shoe can be used until it is worn f clear to the steel back.

I claimas c I 1.. In a brake-shoe of the class described, the combination of a wrought-metal back, a wrought-metal insert, and a cast-iron body IOO 3. In a brake-shoe of the class described,

the combination of a concave-convex perforated steel back, a wrought-metal insert arranged diagonally and provided with grooves or depressions in the side thereof,and a eastiron body portion passedv through the perforations of the steel back and engaging the indentations or grooves of the soft-metal insert to lock the parts together, provide a part of the Wearing-surface and a layer of denser metal between the perforated steel back and the wrought-metal insert to provide and maintain the longevity and efficiency of the brakeshoe, substantially as described. i

HARRYl JONES.

Witnesses:

W. S. DEHART, I. M. OSTMARD.

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