US528198A - Car brake-shoe and dresser - Google Patents

Description

(No 151100161.) y I v A f J. E. WORSWIGK.

GAB, BRAKE SHOE ANQDBBSSER. I No, glga.; Patented oct. 30,1894;

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l UNITED STATE-S PATENT OFFICE.4

JAMES E. WORSVICILIF AMERI-CUS, GEORGIA.-

CAR BRAKE-SHOE AND Driessen.

SPECIFICATION forming part of Letters Patent No; 528,198, `dated October 30, 1894.

Application iiled February 1"'7, 18`94= Serial No. 500,119.9-` (Ilo model.)

To all whom it may concern: l Be it known that l, JAMES EDWARD WORS- `WICK, residing at Americus, in the county of Sumter and State of Georgia, have invented a new and Improved Car-Wheel Brake-Shoe and Dresser, of which the following is a speciii'cation.

My invention relates more particularly to a combined brake shoe and dresser, for use on locomotive and car wheels, and it primarily has for its object, to provide a shoe of this kind, of a simple but inexpensive construction, and in which a perfect cutting surface will at all times be maintained in the face of the shoe, so as to keep that part `of` i the intended cutting surfaces which then becornes useless for thepurpose intended; secondly, the refuse particles become fused on the face of the shoe, and impair the efficiency of the brake; thirdly, as the cutting portions are Iiush with the face of the shoe, no provision is made for automaticallymaintaining a cutting edge on the harder or cutting material as the face of the shoe is worn away. Furthermore as the bearing faces of the intended cutter portions are arranged iush with other bearing portions of the shoe, it is therefore apparent it does not accomplish the object in view-that of dressing wheels. These objections I overcome by the use of my invention, which consists in the peculiar and novel features of construction hereinafter first described in detail, and then particularly pointed out in the appended claims, reference being had to the accompanying drawings, in which-f- Figure l is a perspective View of my improved brake shoe and dresser. Fig. 2` is a longitudinal section thereof. Fig. 3 isa transverse section of the same on the line 3-3 Fig. 2. y 4 is a view ofthe sinuous cutter plate or member. Fig. 5 is a plan view of the inner or bearingface of the shoe with an angular cutterplate or member.

Referring to theaocompanying drawings, A indicates the shoe, which has the usual tread bearing and flange bearing portions B and C. This shoe is made of cast iron and steel, or of any two metals of dierent degrees of hardness, `the main or body portion D being of the softer metal. In'the construction shown, the harder or steel portion E is sin uous in shapeand preferably concaVo-convex in form, or it maybe formed of a series of angles reversed, as shown in Fig. 5, and eX- tends continuously from end to end of the inside or contact face of the shoe or main portion,and such portionE in the process of manufacture is placed in the mold or sand and has the iron or softer metal cast around it.

It will be noticed by reference to Fig. 3, that. the portion E has its lower edge, which forms, owing to its sinuosity, a series of concavo convex transverse bearing or cutter members E', projected below the face of the main portion, the degree of cutting surface diminishing from the center of cutter to the contact portion of the tread of the wheel, for the'purpose presently explained.

At alternate sides of the reverse curves of the lower end of the sinuous portion E, depressions F are formed in the softer metal,

which have outlets G, which extend through -to the outer edge of ,the shoe and form out lets for the escape of the cuttings or refuse matter as will hereinafter more fully appear.

y The ends of the flange portion bearing faces have transverse cutter members of hard material, at the inner faces of which are depression or grooved portions H, which also have outlets h as shown. y

Employing a continuous piece of material harder than the body, extended longitudinally of the shoe, greatly strengthens the shoe, and by making such piece sin nous provides for a series of transverse cutting edges, the curvatures of which act as supports for one another and strengthen each other, and thereby eifectually prevents any of the cutting surfaces becoming displaced.

By providing depressions on alternate sides IOC of the reverse curves of the cutter members,

' of cutter as it approaches that part of tread which comes in contact With rail, or that part of face of Wheel which wears fastest; also cutting surface increases at point Where there is the least Wear.

The depressions in the face of` the shoe, while apparently reducing the frictional surface, do not practically lessen its efficiency as a brake shoe, in consequence of the in creased resistance of the steel, or hard metal cutting surfaces.

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

1. A car Wheel brake shoe and dresser, having a body formed of a soft metal and having transverse cutting or dressing faces of a harder material, which are projected beyond the bearing face of the soft portion as specified.

2. Ina car Wheel brake shoe and dresser, in combination, the main or body portion formed of a soft metal, cutting portions formed of a harder metal cast with the soft metal, and having their inner edges projected beyond the inner face of the soft metal, as and for the purpose described.

3. A car Wheel brake shoe and dresser, having transverse cutter members, projected beyond the inner? face outside of its tread portion, the degree of cutting surface diminishing as it approaches that part of tread which receives the most Wear, and increasing at a point where there is the least Wear, as `and for the 'purpose set forth.

4. A car Wheel brake shoe and dresser, consisting of a body portion formed of two metals of dierent degrees of hardness, the harder one being sinuous and extending from end to end of the softer metal with its reverse edges projected above depressions to form transverse cutting members, as and for the purposes specified.

5. A car Wheel brake shoe and dresser, formed of a main or body portion of a soft metal, and an integral continuous portion formed of a harder material projected transversely beyond the contact face of thebody at intervals, substantially as shown and described.

6. Acar Wheel brake shoe and dresser, composed of a body formed of a main portion of soft meta1,and a portion of harder metal projected beyond the bearing face of the soft body, the spaces in such soft body between the hard metal portions having pockets or depressions, terminating at their outer ends in discharge openings, all arranged substantially as shown and for the purposes described.

7. A car Wheel brake shoe, comprising` a main or body portion of a soft metal, such as iron, anda harder portion, such as steel, formed of a sinuous or angular member extending continuously from end to end of the shoe, whereby to form transverse reversely curved cutting members, said soft body having depressions on alternate sides of the reverse curves of the cutting portions, substantially as and for the purposes described.

8. A car wheel brake shoe and dresser, formed of a body of soft metal having projecting cutting faces formed of a continuous member of harder metal cast with the soft body, sinuous or angular in shape, extending from end to end of the soft body, and having its bearing faces concaved to fit the curvature of any Wheel to which it is to be applied, substantially as shown and for the purposes specified.

J. E. WORSWICK. Witnesses:

C. A. HUNTINGTON, J r., J. M. WHEELING.

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