US1175255A - Brake-shoe. - Google Patents

Description

J. D. GALLAGHER.

BRAKE SHOE.

APPLICATION FILED DEC. 18, 1914.

1,175,255. 5 Patented Mar. 14-, 1916.

i J i": :11 if mmvrok UNITED STATES PATENT OFFICE.

JOSEPH D. GALLAGHER, OF GLEN RIDGE, NEW

JERSEY, ASSIGNOR TO AMERICAN BRAKE SHOE & FOUNDRY COMPANY, OF MAHWAH, NEW JERSEY, A CORPORATION OF NEW JERSEY.

BRAKE-SHOE.

Application filed December 18, 1914. Serial No.

To all whom it may concern.-

Be it known that I, JosnPH D. GALLA- GHER, 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 invented 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 an improvement upon the shoe shown and described in an application filed by me on the 2nd day of May, 1913, and bearing Serial Number 765,010 and ,issuing as Patent Number 1,122,583. i v

In the above-mentioned application, I have described that ordinarily the body of a brake shoe contains such a quantity of metal that when applied to the tread of the wheel it is Warped or twisted, due to the heat generated by friction, the body of the shoe straightening out and thus resulting in 1mperfect contact between the shoe and the tread of the wheel. When the shoe is subse uently cooled it may assume a slightly diflerent curvature to that which it originally had, and when subsequently applied to the tread of the wheel the ends or toes only of the shoe will come into contact with the tread of the wheel, this distortion resulting in constantly shifting the wearing portions or areas of the shoe. In .order to overcome this defect, I have provided the shoe with slots or recesses on opposite sides of the transverse center of the body, these recesses extending substantially to the back .of the shoe and dividing the body into segments. I have found, however, that in the handling of this slotted or segmental shoe, that is, in the loading and unloading of the same into and from freight cars, and also during transportation, and also while the castings are being finished in the tumbling barrel, there is always more or less danger of injuringthe shoe by cracking the metal adjacent to the reinforcing back, this being due to the fact that the slotting of the shoe partway through the body, and to points in proximity to the reinforcing back or plate, weakens the shoe.

The object of my present invention is to so construct the shoe that while the feature of slotting or recessi'ng the body may be retained, yet at the same time to obviate all danger of breaking or cracking the metal Specification of Letters Patent.

' and with the Patented Mar. 14, 1916. 877,853.

between the end of the slot and the reinforcing back, and with this and other ends in vlew, the invention consists in certain novel features of construction as will be hereinafter fully described and pointed out in the claims.

In the accompanying drawing, Figure 1 1s a view in side elevation of a brake shoe constructed in accordance with my invention. Fig. 2 is atop plan view thereof. Fig. 3 is-a sectional view taken on the line 3 3 of Fig. 1.

Referring to the drawings, 5 represents the body of the shoe, and made of any desired metal, such, for instance, as gray iron, the back of the shoe being provided with a reinforcing plate 6, this plate being provided with holes or openings 7 through which the body metal is allowed to flow in order to securely anchor the parts together. The shoe is further formed with an attaching lug 8 of any desired construction or type, guide lugs 9 and end stops 10, as is usual in structures of this kind. By reference to Figs. 1 and 3 of the drawing, it will be seen that the reinforcing plate 6 has its sides turned or bent downwardly to form flanges 11, the width or depth of the flange being such as to extend substantially to the upper ends of the slots or recesses 12 formed in the body of the shoe, and dividing the latter into sections or segments.

By thus forming the shoe it will be understood that an added stiflness or rigidity is given to the plate and to the back or rear portion of the shoe, largely overcoming any danger of the shoe being straightened out, as.above,described, and avoiding the danger of cracking the metal of the body between the upper end of the slot and the back or rear surface of the shoe. Furthermore, thisavoids the necessity of bridging the slots or recesses 12, either by the cast metal of the body of the shoe, or by separate pieces or inserts molded into the shoe, the reinforcing plate 6, with its depending side flanges, together with the metal or stock comprising the back of the shoe, effectually preventing any distortion of the shoe either during the handling of the same or while in service.

It will of course be understood without further description or illustration that the ribs or flanges on the reinforcing back may be located at other places than on the edges of the plate, it being essential only that they extend lengthwise or longitudinally of the plate, and of suflicient depth or width to impart to the structure the necessary strength to overcome any stress or strain which might be exerted or imposedupon the body of the shoe to result in straightening the same out and cracking the metal at the upper ends of the slots or recesses.

What I claim is 1. A brake shoe comprising a body provided with a plurality of recesses extending from the wearing face thereof toward the back, a reinforcing plate anchored to the back of the shoe and having its edges bent downwardly to form flanges and extending approximatelyv to the outer ends of said recesses. Y

2. A brake shoe comprising a body having a recess extending from the wearing face thereof toward the back, and a reinforcing back plate anchored to the back of the body of the shoe and having its edges bent over to form flanges, said flanges embracing and reinforcing the body of the shoe between the outer ends of said recesses and the rear surface thereof and. holding the back against JOSEPH D. GALLAGHER.

Witnesses; I

ANNA V. VVALsH, Greener E. COOK.

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