US715906A - Adjustable brake-shoe head. - Google Patents

Description

N0. 7|5,906. Patented Deb. l6, I902.

C. F.. UEBELACKER. ADJUSTABLE BRAKE SHOE HEAD.

(Application filed June 16, 1900.)

(no Model.)

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,sponding figures of reference refer to corre- U rrnn STATES PATENT FFICE.

CHARLES E. UEBELAOKER, OF ELMIRA, NEW YORK, ASSIGNOR TO THE PEOKHAM MOTOR TRUCK AND WHEEL COMPANY, OF NEW YORK, N. Y.

ADJUSTABLE BRAKE-SHOE HEAD.

SPECIFICATION forming part of Letters Patent No. 715,906, dated December 16, 1902.

Application filed Tune 16, 1900.

To all whom it may concern.-

Be it known that 1, CHARLES F. UEBEL- AOKER, a citizen of the United States, and a resident of Elmira, Ohemung county, State of New York, have invented a certain new and useful Adjustable Brake-Shoe Head, of which the following is a specification.

My invention relates to improvements in braking devices for vehicles of various kinds, and particularly to brakes applied to the rims of wheels of railroad-cars and the like running at great speed and acquiring a high momentum, in consequence of which brakeshoes must be applied thereto under heavy pressure and are apt to wear out quickly and unevenly unless such'pre ssure be uniform over the entire face of the brake-shoe.

The object of my invention is to provide, in combination with a brake-shoe and a brakeshoe head, means for so adjusting said head with reference to the appliances for actuating the brake that uneven wearing of the brake-shoe may be prevented by suitable timely adjustment of the parts. I accomplish this object by the means hereinafter described.

In the accompanying drawings, formingpart of this specification, and wherein corresponding parts, Figure 1 is a side elevation, partly in section, of a brake-shoe, brake-shoe head, and my preferred device for adjusting the position of the head with reference to the brake-beam, while Fig. 2 is a vertical section along line 2 2 of Fig. 1 looking toward the left. Figs. 3 and 4. are side elevations, partly in section, of modified constructions embodying the principle of my invention.

Referring first to Figs. 1 and 2, is a brakeshoe of usual form and construction, the rim 11 of the wheel to whose circumference it is applied being shown in dotted lines. The rear side of the brake-shoeis recessed at 12 and 13, and between said two recesses a projection or tooth 14 extends outward. 15 is the brake-shoe head, its face nearest to the brake-shoe fitting the recessed portions 12 13. and tooth 14 of the brake-shoe. 16 is a curving pin or wedge passing through suitable Serial No. 20,515. No model.)

channels in adjoining parts of the shoe and the head for firmly uniting said two parts in a well-known manner. 17 is the brake-beam. No special means are shown in the drawings for actuating the same, as myinvention does not relate to such features, ,it being understood that any proper means maybe applied for actuating said brake-beam,and with it the brake-shoe, toward the rim of the wheel.

The following novel features embody my invention:

18 is a segment representing substantially one-half of a cylinder of a diameter equal to the width of the brake-beam and serrated around the greater portion of its circumference, 19 19 being teeth all of exactly the same configuration and placed on both sides of the middle portion of the circumference of the segment at equal distances from each other. Said segment is fixedly attached to the brake-beam.

20 is a cheek integral with brake-shoe head 15 and extending'rearward therefrom. Its concave under side closely fits the serrated circumference of the segment 18.

21 is a strengthening-rib on cheek 20, ex-

tending from its extreme rear end to the up-' per portion of the brake-shoe head.

22 22 are screw-bolts passing through brake beam 17, segment 18, and cheek 20, so as to firmly unite said three parts.

In case it should appear that during application of the brake the upper portion of brakeshoe 10 was bearing more heavily upon the wheel-rim than its lower portion, the necessary correction would then be made by loosening bolts 22, disengaging the serrated sur faces of parts 18 and 20, and moving cheek 2O rearward with reference to segment 18 to the extent of one or more teeth, sufficiently to thereby secure uniform bearing of the brake-shoe on the rim. In case the lower portion of shoe 10 was bearing too heavily on the wheel-rim relative displacement of parts 18 and 20 would of course have to be efiected in the opposite direction. To permit of firmly holding together parts 18 and 20 in these varying positions by means of bolts 22, a slot 23 is provided in cheek 20, which slot will accommodate said bolts in case such relative displacement of cheek and segment 18 be accomplished in either direction to the extent of several teeth.

It will be observed that the construction de scribed offers the advantage that while absolutely rigid connection between the brakebeam, the brake-shoe head, and the brakeshoe is secured any readjustment of these parts in the manner and for the purposes described can be accomplished in aspeedy and eificient manner.

In the device illustrated in Fig. 3 a lug 24 extends rearward from the upper rear portion of brake-shoe head 15. 25 is a bracket, to which brake-beam 17 is secured by a bolt 26. Said bracket carries two lugs. The upper one (indicated by 27) is hinged at 28 to lug 24, while lower lug 29 carries an adjusting-screw 30, (for which a Wedge may be substituted,) resting against a projection 31 on the rear central portion of the brake-shoe head. In this case when the pressure on the upper portion of the face of the brake-shoe is to be increased, the same is accomplished by so turning screw 30 that the distance between parts 29 and 31 is increased, and vice versa.

In the device illustrated in Fig. 1, 31 is a lug extending rearward from brake- shoe head 15, and 32 is a bracket to which brake-beam 17 is secured by bolt 33. Said bracket on each side of lug 31 is provided with a clamping-cheek 34 in such manner than when bolt 35, passing through said check and lug 31, is screwed up tight the brake-shoe head will remain in the position relative to brake-beam 17 previously imparted to it by revolving it around said clamping-bolt 35, and it will thus be seen that in case excessive wearing of either the upperor the lower part of the face of the brake-shoe should take place this can be corrected readily by unclamping parts 31 and 35 and, after suitably swinging the brakeshoe head, and with it the brake-shoe, around the swivel-joint at 35, reclamping aforesaid parts.

It will readily be seen that various features of my invention might be varied without departing from the spirit of the invention, and I therefore do not wish to confine myself to the detail constructions shown and described.

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

1. The combination with the brake-shoe, of the brake-shoe head having a rearward-extending cheek provided with a serrated concave surface, the brake-beam, a segment attached thereto and having serrations on its circumference adapted to engage with the serrations on said concave surface in varying relative positions, and a bolt for fixedly attaching said check to said segment, a slot being provided in said cheek to accommodate said bolt while segment and cheek occupy such varying relative positions.

2. The combination with the brake-shoe, of the brake-shoe head having a rearward-extending cheek provided with a corrugated or roughened concave surface, the brake-beam, a segment attached thereto and having its circumference corrugated or roughened and adapted to engage with the said corrugated or roughened surface of said cheek, in varying relative positions, and a bolt for fixedly attaching said cheek to said segment, a slot being provided in said check to accommodate said bolt while segment and cheek occupy such varying relative positions.

3. The combination with the brake-shoe, of a brake-shoe head having a rearward-extending cheek provided with a concaved surface, a brake-beam, a segment attached thereto adapted to engage with said concave surface in varying relative positions, and means for fixedly securing said segment to said cheek in such varying relative positions.

Signed at Elmira, Chemung county, State of New York, this 6th day of March, 1900.

CHARLES F. UEBELACKER.

Witnesses:

J. E. M. BOWEN, M. C. PINCKNEY.

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