US678997A - Brake-shoe. - Google Patents

Description

No. 678,997. Patented my 23, I901.

w. E. aon'rou,

BRAKE SHOE.

(Application filed 0d- 96, 1900.)

(No Model.)

WITNESSES: INVENTOR- M L; NMMQSM 'BY' EM X? W V UNITED STATES PATENT DEErcE.

WILLIAM EDWARD GORTON, OF OORNING, NEIV YORK, ASSIGNOR TO THE CORNING BRAKE SHOE COMPANY, OF SAME PLACE.

BRAKE-SHOE.

SPECIFICATION forming partof Letters Patent No. 678,997, dated July 23, 1901.

Application filed October 26, 1900. Serial No. 3l,452. (N0 model.)

To a whom it may concern.-

Be it known that I, WILLIAM EDWARD GORTON, a citizen of the United States, residing at Corning, in the county of Steuben and State of New York, have invented a new and useful Improvement in Brake-Shoes, of which the following is a specification.

This invention relates to improvements in brake-shoes wherein a cast-iron body portion is provided with a strengthening-plate of steel or iron secured to the back thereof; and the object of my invention is to so improve the construction and form of this strengthening-plate as to provide a practically indestructible attaching-lug for the shoe and at the same time to materially lessen the cost of manufacture. Recentlystrengthening-plates for this purpose have been made from steel or iron plates cut and formed in dies and secured to the back of the shoe in the process of casting, the attaching-lug being either cast with the shoe around notches or reduced portions in the sides of the plates or formed up from the strengthening-plate itself and reinforced by the cast metal of the shoe. In all of these shoes as above described the required strength in the attaching-lug is attained by reason of the cast metal which is run up from the body portion in the process of casting either to form or to reinforce the lug, and it is necessary to use a core in the mold to form the keyway through the lug.

In my improved form of strengtheningplate the attaching-lug of requisite strength is formed solely from the plate and there is no cast metal run into it, whereby there is a saving not only in the amount of cast metal put into each shoe, but also in the cost of molding, since no core is required.

I attain my object by means of a strengthening-plate formed as illustrated in the accompanying drawings, in which- Figure 1 represents my strengthening-plate ready to be attached to the shoe; Fig. 2, a plan view of the plate after it has been cut out ready to be formed up in the dies, and Fig. 3 a longitudinal section through a completed shoe with my strengthening-plate secured thereto.

Similar letters refer to like parts in the several views.

A represents the strengthening-plate,which may be made of any suitable ductile metal, preferably steel.

B B represent apertures in the plate,through which in the process of casting the shoe the molten iron runs in order to bind the plate firmly to the cast-iron body portion. I also notch the ends of the plate at C O in order that the cast metal which forms the guide lugs may run up therethrough and be firmly united to the body of the shoe. Any desirable shape may be given to these apertures and notches.

D represents the attaching-lug, which is formed at the center of the plate by means of suitable dies. This lug is formed, preferably, in the shape of a frustum and comprises the two transverse walls E E and the two side walls F F, which latter are formed on the plate in the act of cutting out the plate in the first instance, being side projections from the center of the plate, as illustrated in the blank shown in Fig. 2. Two apertures G G are cut in the portions of the plate which form the transverse walls of the attaching-lug in order to provide a keyway through the lug. In casting the shoe with this strengthening-plate the lug D is first filled with sand, after which the plate is set in position in the top of the mold and fastened therein by suitable devices. The flask is then closed and the molten metal run in. The metal rises around the sides and ends of the strengthening-plate and through the perforations, the plate becoming thereby firmly secured to the back of the shoe. The metal does not rise into the lug D by reason of the sand therein; but it does rise sufficiently high to embrace the inner edges of the side Walls F F. After the shoe is taken from the mold the'sand will be re moved from the interior of the lug D. It will be apparent that the attaching-lug thus formed will be strong and stifi and that it will be next to impossible to knock it out of shape in the rough handling to which brakeshoes are subject. This strength is due to the fact that the lug is formed up from the strong metal of the strengthening-plate and that it comprises four walls, which have their inner edges firmly embedded in the metal of the body portion. I am also enabled to do saving in the cast metal, which would other- Wise be run up either to form the lug or to reinforce it, such reinforcing being unnecessary by reason of the construction of my lug.

Having thus described my improvement, What I claim as my invention, and desire to secure by Letters Patent, is-

1. A brake-shoe comprising a cast-iron body portion and a strengthening-plate of ductile metal secured to the back thereof, said plate having an integral four-walled attaching-lug with a keyway through the transverse Walls formed up therefrom, substan-'- I nature in presence of two Witnesses.

tially as set forth.

2. A brake-shoe comprising a cast-iron body portion and a strengthening-plate of ductile metal secured to the back thereof, said plate being provided with side projecwith perforations through the portions forming the transverse Walls to form the keyway therethrough.

3. A brake-shoe comprising a cast-iron body portion and a strengthening-plate of ductile metal secured at the back thereof, said plate being provided with side projections at the center, wherebyafour-walledattaching-lug is formed up therefrom in dies, the plate and inner edges of the side walls being secured to the body portion in the process of casting.

In testimony whereof I have affixed my sig- WILLIAM EDWARD GORTON. Witnesses:

H. T. MERCER,

Jos. B. TROBELL.

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