US1282740A - Brake-shoe. - Google Patents

Description

G. T. BOND.

BRAKE SHOE.

APPLICATION FILED MAY I. 1918.

1,282,740. Patented 001;. 29,-1918;

avwewiloz GEORGE T. BOND, OF HUNTINGTON, WEST VIRGINIA.

BRAKE-SHOE.

nsane.

Application filed May 1, 1918.

To all whom it may concern:

Be it known that I, GEORGE T. BOND, a citizen of the United States, residing at Huntington, in the county of Cabell and State of 'West Virginia, have invented certain new and useful Improvements in Brake- Shoes, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to a type of brakeshoe that includes a wearing member and a holder secured thereto and arranged to cooperate with a brake-head to maintain the shoe in operative position with respect to a wheel.

More particularly, the invention pertains to a compound shoe in which the holder member is secured to the wearing member in such manner that the two members may be separated and the holder member again used with a new wearing member after its predecessor is withdrawn from service because of being worn, fractured, or otherwise impaired.

It is an object of the invention to provide certain improvements in the formation and arrangement of parts of a shoe of this type in order generally to insure the integrity of the assembled partsof thearticle,

and especially to avoid subjection of the fasteners holding the parts together to thrust or shearing stresses.

When read in connection with the description herein, the details of construction and arrangement of partscontemplated by the invention will be apparent from the accompanying drawings, forming part hereof, wherein an embodiment of the invention is disclosed, for purpose of illustration.

While the disclosures herein now are considered to exemplify a preferable embodiment of the invention, it is to be understood that it is not the intention to be limited necessarily thereto in interpretation ofthe claims, as alterations and adaptations with in the limits of the claims can be made without departing from the nature and spirit of the invention.

Like reference-characters refer to"corre s'ponding parts in the views of the drawing, of which Figure 1 is a side elevation of a brakeshoe in place on a brake-head; I

Fig. 2 is a plan-vieWofthe rear side of Specification of Letters Patent.

Patented (1 017.29, isle. Serial No. 231,920.

the shoe, showing in part the holding member and in part the wearing member;

Fig. 3 is a transverse sectional view on the line 3-3, Fig. 1: and

Fig. 4: is a transverse sectional view on the line H, F ig. 1.

Having more particular reference to the drawings, 5 designates abrake-head, 6 designates a recess or seat therein for reception of a similarly-shaped keeper 7 of a malleable or otherwise suitably formed brake-shoe back or holder member 8 secured to a wearing member 9, and 10 designates a retaining-key disposed in longitudinal openings or passageways 11 in the brake-head and 12 in the keeper, the key and keeper assisting inthe maintenance of the shoe on the head in a manner well known to the art.

In order that a worn, fractured, or otherwise impaired wearing member may be removed from a holder and the latter again used in association with a new wearing member, the invention provides for employment of bendable fasteners permanently embeddedin the wearing member and arranged to maintainthe two parts in abutment, the fasteners being of such character that they may be bent or sheared off to permit separation of the parts, and the invention provides also in association with such an arrangement means to receive, and to prevent subjection of the fasteners to,.

thrusts or shearing stresses between the two parts.

The fastener of this kind used in accordance with the invention is a malleable or bendable sheet-metal member 13, constituting an elongated lug, which is cast in the wearing member at the time of its formation and extends outwardlyfrom its rear face, where it is in position to be passed through an opening. in the holder and bent over thereagainst toholding position. In

order that the lug may have better hold in the wearing member, it is formed in its embedded portion with a laterally-extending flange or foot 13*.

A plurality of such lugs are cast in the wearing member and extend outwardly, before association with the holder, at substantially right angles to the holder-abutting face. The holder has slots 14, corresponding in number and disposition to the lugs, and they are somewhat longer than the lugs in order to receive them in case they may not be cast in at exactly the proper places, and in order also that the lugs may not be subjected to thrusts or shearing stresses as a result of any slight relative movement between the holder and wearing member that may occur when thc shoe is performing its breaking action against a wheel.

Usually, the lugs and the slots in the holder to receive them are disposed in pairs, each slot and lug ot a pair being positioned between the axis of the shoe and a lateral margin, one pair being near each end of the shoe and one on each side of the keeper, at points corresponding to the places where the brake-head contacts with the holder.

The holder is formed in each end portion with a projection 15 arranged to seat in a recess 16 in the end portion of the brakehead, and also with a transverse rib 17 at each end, which overlaps the end of the brake-head. The projections, recesses, and ribs sustain some of the thrusts or shearing stresses between the brake-head and shoe, in order that they may not be imposed entirely on the keeper, and the projections and recesses particularly relieve the keeper of twisting tendency that may be present in the shoe. The slots 10 in the end portions of the holder are positioned one on each side of a projection 15.

A wearing member and a holder are assembled by passing the lugs 13 through the slots 14 until the wearing member and holder are in abutment with each other and then bending the lugs over toward the margins of the shoe and down against the outer face of the holder. When the shoe is placed on a brake-head, the head seats against the bent-over portions of the lugs and thereby decreases the liability of the lugs to bend outwardly from the holder and after thus decreasing their hold thereon to pull out from the slots.

When it is desired to remove a wearing member from a holder, because it is worn or fractured or for any other reason, the lugs are bent outwardly or sheared off and the member withdrawn.

In order to avoid imposition of thrusts or shearing stresses on the lugs while the shoe is in service, the wearing member has protuberances 18 on its rear or holderabutting face, which seat in recesses 19 in the holder. These cooperating protuberances and recesses are so disposed that they are contiguous to the projections-keeper 7 and parts 15-where thrusts or shearing stresses are most directly imposed 011 the parts by resistance of the brake-head to the action of a wheel in contact with the wearing memher, so that the strains may be taken up immediately without unnecessary imposition upon the structure at other points. For this reason, a protuberance and recess are under the keeper at the approximate center of the shoe and in each end portion under a projection 15.

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

1. A brake-shoe comprising a holder arranged to cooperate with a brake-head and formed with openings and recesses, and in abutment with said holder a wearing memher having lugs embedded therein extending through said openings and bent down against the holder and protuberances seated in said recesses.

2. A brake-shoe comprising a holder arranged to cooperate with a brake-head and formed with slots and recesses, and in abutment with said holder a wearing member having elongated lugs embedded therein ex tending through said slots and bent over flat toward the margins of the shoe down against the holder .and protuberances seated in said recesses.

3. A brake-shoe comprising a holder having projections and formed with openings and recesses contiguous to said projections, which projections cooperate to sustain thrust stresses between it and a brake-head, and in abutment with said holder a wearing member having lugs embedded therein extending through said openings and bent down against the holder and protuberances seated in said recesses.

4. A brake-shoe comprising a holder having projections and formed with slots and recesses contiguous to said projections, which projections cooperate to sustain thrust stresses between it and a brake-head, and in abutment with said holder a wearing member having lugs embedded therein extending through said slots and bent over flat toward the margins of the shoe down against the holder and protuberances seated in said recesses.

5. A brake-shoe comprising a holder having projections and formed with slots at the sides of said projections and with a recess under each projection, which projectionscooperate to sustain thrust stresses between it and a brake-head, and in abutment with said holder a wearing member having ing a projection in an end portion arranged to seat in a brake-head and formed With a recess under said projection and With an opening on each side thereof, and in abutment With said holder a Wearing member having a protuberance seated in said recess and lugs embedded therein extending through said openings and bent down against the holder.

8. A brake-shoe comprising a holder having a projection in each end portion and a keeper arranged to seat in a brake-head and formed with a recess under said keeper and each of said projections and With openings, and in abutment With said holder a Wearing member having protuberances seated in tit said recesses and lugs embedded therein extending through said openings and bent down against the holder.

9. A brake-shoe comprising a holder hav ing a projection in an end portion arranged to seat in a brake-head and a rib arranged to overlap the end of the head and formed with a recess under said projection and With openings, and in abutment With said holder a Wearing member having a protuberance seated in said recess and lugs embedded therein extending through said openings and bent down against the holder.

In Witness whereof I have aifiXed my signature.

GEORGE T. BOND.

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

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