US1532141A - Brake band - Google Patents

Description

Ap ril 1, 1925.

' P. G. KENYON BRAKE: BAND Fi1ed May 10, 1924 r Y ar Aw N T R N 0 Em T vz T N A I Y N? PatentgdAprJ; i

UNITED STATES P TENT"orifice.

PERCY GEORGE KENYON, OF ROGHDALE, ENGLAND, ASS IGNOR TO TURNER BROTHERS ASBESTOS COMPANY LIMITED, 01 SPOTLAND, ROCHDALE, LANCASTER, ENGLAND.

BRAKE BAND.

Application filed May 10, 1924. Serial No. 712,202.

To all whom it may concern:

Be'it known that I PERCY GEORGE KEN- YON, a subjectof the and Ireland, residing'at Sydways, Spotland, Rochdale, in the county of Lancaster, England, have invented new and usefril Im-. provements inf Brake Bands, of whiehthe With the foregoing and other objects in.

view, the invention consists in the novel fea -tures of' construction and combination of parts which will be more fully"'described hereinafter and particularly pointed out in the claims. p

In the drawings accompanying and forming part of this specification:

Fig. 1 is aside elevation of a brake band of the contracting type constructed in accordance with the present invention;

Fig. 2 is a side view of a brake band of the expanding -type,showing the same attached to the usual metal holder; and

Fig. 3 is a transverse section taken on the line IIL-III of Fig. 2. f

The same characters of reference designate the same parts in the different figures of the drawings.

Referring to the drawings, adesignates a metal core, which is enclosed within an envelope b, of fibrous material, the ends of said core extending beyond the ends of the envelope, so that the core may bet bent at its end in any suitable manner for attachment to the brake operating mechanism,

The core a is provided along that portion of its length which is within the envelope, with a plurality of projections or spurs (Z extending from opposite surfaces thereof, whereby, after the core has been inserted in the envelope, the latter will be kept from creeping along the core. The spurs d may be punched up from the material of the core itself, or may be made separately and attached to said core. In Fig'. 2 the core is king of Great Britain of effective braking surface.

shown secured to an. expanding metal holder 0, the protruding ends of the core being bent into the proper form so as to securely fasten it to said holder, the holder being of the usual type used in connection with expanding brakes.

In previous practice such brake bands have been employed to line metallic brakeshoes or other-metal carriers and they are secured to such by means of rivets. This riveting process presents certain difiicultics in execution, and, moreover, the space occupied by the rivet heads reduces the area In this invention the brake band of fibrous material is combined with a core of metal, which may be either woven wire, preferably with 'barbs, or a strip of flat metal perforated or punched, and hereafter referred to as the metal core. Such barbs, perforations or punchings provide projections with sharp edges, arranged to occur alternately on each faceof the metal,

which provide clinching'properties with the fibrous portion of the band on both sides of the metal core.

The combination of fibrous material and metal core is made in such a manner that with brakes of the contracting type the usual metal band towhich the brake lining is riveted may be dispensed with and the necessity for riveting is obviated. In this case it is only necessary. to connect the projectingends of, the metal core to the usual I brake actuating mechanism, the metal core taking the place of the ordinary metal band. In brakes of the expanding type it would suffice for the projecting ends of the metal core being secured to the ordinary metal holder by bending such projecting ends over the ends of the holder or securing them to such holder by any convenient means. In this case also" the necessity for rivets through the brake lining is dispensed with.

This not only simplifies the original installation of brake liningsv and their renewal but presents full area of brake surface to the brake drum.

There are various'ways in which lcarry this invention into effect. In the first, I weave the material for use as a brake band tubular in formation, but with a preponderance or increased thickness of material on the face whieh is to be used as the eon- I tact side of the bands. For instance, the

- band is woven, from asbestos, metal re-inforced asbestos, cotton or other fibrous material in a number of plies or cloths of the required width; Two or more of these 'plies or cloths are bound together during the roce'ss of Weaving, one ofthe plies or cloths eing fastened'to the others at the seli'edge, so as to form a fiat tube. having one part of its section thicker than the other part. For .example,.four cloths or plies may be. woven, three of which are bound together all across their width, while the fourth or outer cloth .is secured to; the combined other cloths at theselvedge only. The'number of'plies'or cloths may, however, be varied as desired. Woven in the manner described a sheath is formed into which I insert the metal core.

In a second method I- use folded asbestos cloth, cotton cloth or other textile fabric to get the required, thickness, and .the'metah core is inserted between twoof the folds in such a manner that the same effect is obtained as in the 'case of the cloths which i 'are plied in weaving. Or I may cover the and contact surface, and alsoto make a thoroughly inseparable combination between the fibrous material and the metal core.

The inseparable combination between the brought about partly by the impregnant used in the finishing treatment and partly fibrous material and the' metal 'co'refis i.

by the bending over or clenching of the" projections in the metal core.

In the case of contracting brakes as stated above the combined and finished product can then be attached directly to the brake actuatingmechanism without any necessity for employing the usual metal band.

Also for expanding. brakes the metalcore of the product may be fastened to the ordi nary metal holder without the necessity for employing rivets through the actual braking surface.

I declare that what I claim is':

1. A brake band, comprising an envelope offibrous material, and a metallic operating core passing through said envelope, the ends of said core extending outside of the envelope for attachment to brake-actuating mechanism.

2. A brake, band, comprising an envelope of fibrous material, and a metallic operating core-passing through said envelope and provided with means within the envelope for gripping the same, the ends of said core ex tending outside of the envelope .for attachment to brake-actuating mechanism.

3. A brake band, comprising an envelope of fibrous material, and a metallic operating core passing through said envelope, the portion of-the core within the envelope being punched'up'to provide spurs extending from opposite surfaces thereof thereby to grip the envelo e, the ends of the core extending outside 0 the envelope for attachment to brake-actuating mechanism.

In testimony whereof I have signed my name to this specification.

- PE C GEORGE .KENYON;

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