US944573A - Brake-shoe. - Google Patents

Description

' H; H. MOALISTER.

BRAKE SHOE. APPLICATION FILED mm: 21, 1909.

Patented Dec.28, 1909.

H. H. McALISTER.

I .BRAKE SHOE. APPLIOATION FILED JUNE 21, 1909.

944,57 3. Patented Dec.28,1909.

2 sinus-sum 2. Hg. 5. I

I WITNESSES ALIs'rnR,

I be used on wheels at either sideof .the locoinv an emergency for securing bolt ordinarily. employed for that purpose 1 To all whom it may concern:

locomotives and cars,-

bility also makes it possible 'to 'supply the shoes are not reversible'because when not'rewheels of each side, of the locomotives or Jsuch construction preventing the broken HENRY Hone McALis'rnn, or FITZGERALD, cnonem.

BRAKE-SHOE.

944,573. 'Specification of Letters Patented Dec 28, 1909.

filed June 21, 1909. Serial No. 503,416.

Application Be it known that I, HENRY Hons Moa citizen of the United States, re.- sidin at Fitzgerald, in thecountyof Irwin and tate of Georgia,jhave' invented certain new and useful Improvements inv Brakeishoes; and I do declare the following to be a full, clear, and exact description of. the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanyingdrawings, and to the figures of reference marked thereon, which form a part of this specification.

My invention relates to brake-shoes for and while designed more particularly for locomotive driving wheels yet possesses features rendering it applicable for car-wheels in general.

part.

It has further for its object to provide an improved construction and application of chilled wearinginserts in the face and the flange groove portions of the brake-shoe so as to insure said inserts being securely held in place loose and separated from the shoe, or lost, and in which they will serve to more effectively dress the face of the wheels where they are least worn by contact with the rails.

To the accomplishment of the foregoing and such other objects as may hereinafter PP hereinafter particularly described and then sought to be clearly defined by the claims, reference being had to the accompanying It has for its object to construct a brakewhich shoe which will be reversible so that it'may proved brake-shoe, showingit attached to a brake-head; Fig. 2 is a front or face view of the brake-shoe; Fig. 3 is a face view of the reinforcing strip; ig. t an edge view of the same; Fig. 5 is a face View of one of the cen trally disposed chilled inserts; Fig. 6 an end view of the same; Fig. 7 a face viewof one of'the end inserts; Fig. same; Fig. 9 a face view-of one of the flangegroove chilled inserts; Fig. 10 a side view of the same; Fig. 11 an end view of the same; and Fig; 12 a plan viewof two modi lied forms of chilled inserts. V

In the drawings, a brake-shoe having the face or tread por-' tion 2 and the flange-groove portion 3, which are of cast metal :as usual. I v

The numeral 4 designates two U-shaped lugs of fmalleablejronjor steel cast in the shoe, one at each end, and normally stand ing up from the body of the shoe but adapted to be bent inwardly over either, or both ends of the brake-head 5, one of them being so indicated by dotted drawing. The shoe is cast with two boltholes ,6, one near each end, so that a bolt 7 may be passed through the lower hole, ac-. cording as one end maybe placed at the bottom of the brakehead; thebolt being secured in place by a pin 8,.so as to he the shoeto the brake Ahead. the shoe with two lugs,

motive or car, or used first on one side and when partially worn may be takenoif and applied to the wheels at the other side of the locomotive or car thus enabling it tobe used until practically worn on This reversidemands of the equipment department of a road with one-half the num er of brakeshoes necessary to keep on hand where the versible'a sufficient number of shoes for the care must be kept in stock. It-has further for its object toprovide a construction in which the brake-shoe will be provided at each end with means for connecting the shoe to the brake-head at the top of the brake-head at whichever side of the, locomotive or car the shoe may be applied,; and in, which said meansmay be employed the lower en ofthe brake-shoe to the lower end of the brake-head in the event that the attaching.

should become broken or detached, and lost. It has further for its object to provide an' improved construction for reinforcing the brake-shoe and to guard. against the destruction of the efiiciency of the brake-shoe in the event of the brake-shoe becoming broken,v

By fo ming part from becoming detached from the other without the possibility of becoming Figure 1 1s a side elevation of the imthe numeral 1 designates ear the invention consists in the features drawings forming apart hereof, and in Y 8 an end view of the lines "in Flg. '1 of the or the other of the shoe one at each end, and with two bolt-holes, one

near each end, the shoe can be applied. to a.

brake-head at either sideof the locomotive,

and abolt passed through the lower'hole to attach the shoe at that end to the brakehead, and the lug at the top maybe bent over the brake-head so as to serve as a means for connecting the shoe at the upper end to the brake-head. In the event of the bolt becoming broken or accidentally detached and lost, the loop at the lower end of the shoe may be bent over onto the brake-head so as to secure the shoe thereto; and it will also serve to prevent the shoe from rising up on the brake-head in the backing of the engine. It will thus be observed that thefuse of the two loops and the two bolt holes ni'ake it possible to reverse the shoes so as to use upper end of the shoe to the brake-head: and 5 'them on either side of the locomotive and that the loops also serve for connectingthe in case of emergency to secure its lower end to the head. i

For the purpose of reinforcing the brakeshoe so as-to give it additional strength and also to prevent a part of it from separating from another part in the event of accidental breakage, a reinforcing strip 9, preferably of malleable metal, is inserted and cast in as a part of the shoe, the strip being located near the rear portion of the shoe, and extending lengthwise thereof.

holes in the body portion of the shoe, and has spurs 1O struck-up from the metal, preferably by cutting and bending the cut porerably so that those to each side of the cen-' ter will incline toward the center, as illus-.

trated, and at the central portion it is preferred to have more of the spurs than at another one point. By having the spurs in- -cline toward the center. they will serve to hold the broken portion of the shoe to the other portion, in case of accident, and prevent the possibility of it slipping down-- wardly and outwardly and separating from the' other portion, whichevervend' of the shoe be uppermost. These spurs also prevent the vpossibility of the strip working loose and slipping in any directlon in the body of the shoe; and the cast metal portion beingmolded about the strip the spurs become embedded therein so as to be practically a part thereof.

To increase the durability of the wearing surface of the face or head and also the flange-groove of the shoe and to afford ashearing cutting tool for dressing the sur- This strip is. formed with holes corresponding to the bolt faces of the locomotive or car wheel which are least worn by contact with the rails, I

provide chilled metal'inserts for both the tieadand the flange-groove portions of the s cc.

tion of the shoe are designated by the numerals 11 and 12,- the inserts at the ends being 11 and the intermediate inserts 12, the former extending preferably substantially the width of the face or tread and the others only partially across the face, and the intermediate ones preferably formed in pairs, as illustrated. Each insert is serpentine in a longitudinal direction, the outline of which may be of difierent configuration, for instance such as illustrated in Figs. 5 and 7, or as illustrated in Fig. 12, or otherwise. Each insert has a T head designated by the numeral l3, and the body or tongue portion of the insert stands at an inclination to a normal to the curved face of the shoe as illustrated. These inserts are-so disposed on each side of a line passin transversely through the central portion 0 the shoe that the inserts. on one side of the central portion will incline in the opposite direction to the inserts on the other side, say from the face rearwardly and toward the end-of the shoe on the side of thecentral portion where the inserts are located, and also disposed in such manner that the inserts on one side of the central portion will be the opposite orreverse of the corresponding inserts on the other side. This will cause the chilled inserts to act in the same manner on the same parts of the wheel whether the locomotive is going ahead or backing up, or whether the shoe is reversed for use on one side or the other of the locomotive or car. These inserts are molded in the shoe in the operation 1 of casting the shoes, and the T heads to the inserts and the inclination of the tongue portions tend to effectively guard against the possibility of the inserts becoming loose 1n the shoes, or separating therefrom in the 11 event of accidental fracture of the cast metal portion of the shoes. The serpentine contour or lines of the inserts afi'ord shearing cutting edges that serve to dress the treads of the wheels, especially those portions that have the least wearlng contact with the rails. The flange-groove portion of the shoes is likewise provided with chilled inserts 14 which are preferably curved in cross section, to a greateror lesserdegree and are inclined to a vertical line and provided with a T head, and are preferably although'not necessarily connected in groups to the same head as illustrated in Figs. 9

and 10. The inserts on one side of a central line passing transversely through the groove ,portion'. are the oppos te or reverse to the.

correspondlng inserts on the other side so that they will act inthe'same way and on the same portions of. the car wheel flange 3 The inserts for the face or tread por- 7o being deflected,

I the shoe, substantially as des whether used on one side or'the other of the locomotive or car, and whether the locomotive be going ahead or backing.

A shoe constructed'with the features specified possesses great strength and durability,

and is capable of being reversed so-as to be used on either side of the locomotive and thus obviates the necessity of keeping on Having described my invention and set forth its merits, what I caim 1s 1- 1. A brake-shoe provided at opposite ends with laterally extending members capable of being deflected for connecting-the shoe to a brake-head, substantially as described.

2. A brake-shoe formed adjacent to each end with a bolt-hole for thepassage of an attaching bolt and provided at opposite ends with laterally extending members capable of members adapting the shoe to be reversed for attachment to a brake-head at either side ofan engine or car, substantially as 1 described.

3. A brake-shoe having embedded therein a reinforcing plate, said plate being formed with spurs projecting from its opposite faces and engaging the metal of the shoe on both sides so the plate, substantially as described.

4. A brake-shoe having embedded therein a reinforcing plate, said plate being wholly contained within the body of the shoe below its rear face and formedwith spurs projects ing at an inclination from its face along the portion thereof lying back of the face or tread portion of the shoe and engaging the metal of the shoe, substantially as described.

5. A brake-shoe having embedded therein a reinforcing plate, said plate being wholly contained within the body of the shoe below its rear'f'ace and formed with spurs inclined in op ositedirections along the portion thereo lyingback of the face or tread portion of the shoe and engaging the metal of dribed.

6. A brake-shoe having embedded therein a reinforcing plate, said plate being wholly contained within the body 'of the shoe below its rear face and formed on opposite sides of the central portion of the-plate with inclined spnrisdthe spurs on one side inclining toward the inclined spurson the other side'of said central portion and in a direction toward the central gortion of the shoe, substantially as describe 7. A' brake-shoe provided in itstread-face with chilled inserts extending transversely said holes'and' extending across the faceand having an irregular sectional outline, said inserts lying on opposite sides of a line passing transversely through the tread, and the inserts on one side of said 'Iine being oppositely or reversely disposed to inserts'on the other side of the line, the

inserts on' one side of said line extending.

at an inclination opposite to the inclination of the inserts on the other side of said line and each of said inserts inclined to a normal to the curvatureof the face of the shoe, substantially as described.

8. A brake-shoe provided in its tread-face with chilled inserts extending "transversely across the face and irregular in outline, said inserts lying on opposite sides of a line passing transversely through the tread, some of said inserts being arranged in Hairs and po-- sitioned intermediate of theen inserts, and

the inserts on one side of said transverse line being reversely disposed to inserts on the op posite side of said line, substantially as described- 9.. A brake=shoe provided in its tread-face withchilled inserts extending transversely across the face, said inserts lying on opposite sides of a line passing transversely through the tread, and the inserts on one side of said line etending at an inclination opposite to the inclination of inserts on' the other side of said line the inserts toward the ends'of the shoe extending substantially the width of the tread-face and the intermediateinserts extending partially across the width of the tread-face, substantially as described.

10. A brake-shoe provided in its treadfacewith chilled inserts extending. transversely across the face, said inserts lying on posed on opposite sides of a linepassing; transversely throu h the roove, and the inserts on one side 0 said line being reversely disposed to the inserts on the opposite side thereof, substantially as described.

12. A brake-shoe formed with a flangegroove and provided in the groove with chille'd inserts curved transversely to the length of the groove, said inserts being disjopposite sides of a line passing transversely posed on opposite sides of a line passing Y transversely through the groove, the inserts on each side of said line having degrees of curvature differing from each other, substantially as described.

13. A brakehoe formed with a flangeoove and provided in the groove with chilled inserts curved transversely I, to the whereof I aflixmy signatnre length of the groove, said' inserts being distestimony in preseneeof two w'1tnesses.

posed on opposite sides of a v line passing transversely throu h the groove, and the in- 1 serts on one side 9 said lme beingreversely 1 HENRY ER" '5 disposed and inclined to the inserts on the vWitnesses: v oppggite side thereof, substantially as dey A. B. Cook;

0. E. Bum;

Images