US1311320A - Brake-shoe - Google Patents

Description

BRAKE SHOE.

APPLICATION FILED DEC. 1s. 191a.

THE COLUMBIA FLANOURAPH (10.. WASHINGTON. D. c;

Patnted July 29, 1919.

UNITED STATES BRAKE-SHOE.

Application filed December 16, 1918.

of New York, have invented certain new and useful Improvements in Brake-Shoes, of

"which the following is a specification.

This invention is a brake shoe having for its object the provision of simple, efficient and economical means to secure the shoe to a supporting element;

The invention includes a body or tread of suitable material, such as cast metal, which may be reinforced by a metallic back to which the key lug is secured; the key lug being fashioned from a blank cut and bent to the desired shape and thereafter interlocked with the back, which is secured to the shoe.

The accompanying drawing illustrates.

one embodiment of the invention with the 'parts constructed and combined according to the best mode of procedure I have so far devised for the purpose.

In the drawings Figure 1 is a longitudinal section of the entire shoe. Fig. 2 is a top plan view 'of the reinforcing plate.

Fig. 3 is a detail sectional View across the end of a plate.

Fig. 4 is a blank shown enlarged from which the key lug element is constructed.

Referring to that embodiment of the invention disclosed in the drawings, the shoe may be composed of a cast metal tread orbody, 1, having anchoring lugs 2, a metallic reinforcing back 3, and a metallic key lug 6.

The reinforcing back 3 may be provided with a plurality of recesses 1, formed by removing parts of the metal, a plurality of centrally positioned slots 10, and a plurality of anchoring lugs 5, as clearly shown in Fig. 2. This back 3 may have its edges tapered, as shown at 3 in Fig. 2, to be engaged by the anchoring or clenching portion 2 of the shoe, which clenching portion serves to secure the plate 3 to the body 1.

The key lug 6 may be made from a single rectangular metal blank, shown in Fig. 4, by slitting the blank at 7 and bending the blank on the dotted lines indicated to produce the form shown at 6, 7, 8, 9 and 13 of Fig. 1.

Specification of Letters Patent.

Patented July 29, 1919.

Serial No. 266,937.

When the blank is cut, the wings 9 are bent downwardly from the plate 6 on the dotted line 12. The plate 6 may then be bent on the lines 1.1 and 12 to form the wings 8, and the upstanding oblong element having the top face 13 and the side apertures 7 which are produced by the bending away of the wings 8.

The key lug 6 is secured to the shoe and reinforcing plate 3 by passing the wings 8 of the key lug element through the slots 10 of the plate 3 and then bent to lie substantially parallel with the under face of plate 3 to be held between the plate 3 and the body 1, it being preferred to have the wing ends extend in opposite directions, as

shown in Fig. 1. The wings 9 are bent toward each other and are shown in substantially abutting engagement parallel with that portion of the upper face of plate 3 which is located within the upstanding section of the key lug, thereby leaving apertures 7 below the top face 13 of the key lug. The wings 8 securely anchor the key lug as a whole to the reinforcing back, and with the parts thus securely united, a durable and efficient shoe is provided which is relatively simple in construction, easily made and consequently inexpensive in first cost.

Having thus described the invention, what I claim as new and desire to secure by Letters Patent is:

The combination in a brake shoe, of a body portion, 'a reinforcing back, means to secure the back to the body portion, and a key lug produced from a single blank of material to provide an upstanding hollow member with depending retaining wings bent from the sides of the upstanding member and thereafter secured in binding engagement with said reinforcing back, and the outer wings of said lug bent inwardly to substantially abutting engagement to lie parallel with the upper face of the reinforcing back and within the upstanding hollow member of the key lug.

In testimony whereof I aflix my signature in the presence of two witnesses.

JUDSON COOK.

lVitnesses:

HELEN A. WIRT, FREE S. REESE, Jr.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. 0.

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