US1187466A - Brake-shoe. - Google Patents

Description

B. C. ROWELL.

BRAKE SHOE. APPLICATION FILED JAN-2.1915.

' Patented June 13, 1916.

3 SHEETS-SHEET I.

B. C. HOWELL.

BRAKE SHOE. APPLICATION FILED JAN. 2, 1915.

Patented" June 13, 1916.

3 SHEETS-SHEET 2.

fizz/EH25 MW /4 M B. C. ROWELL.

BRAKE SHOE.

APPLICATION FILED MN- 2. I915- Patented June 13, 1916.

3 SHEETS-SHEET 3. I

BENTON C. HOWELL, OF CHICAGO, ILLINOIS, ASSIGNOR T0 ANCHOR BRAKE SHOE AND MANUFACTURING COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

BRAKE-SHOE.

memes.

Specification of Letters Patent.

Patented June 13, 1916.

Application filed January 2, 1915. Serial No. 50.

To all whom it may concern:

Be it known that I, BENTON C. Bowen. a citizen of the United States, and a resident of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Brake-Shoes, of which the following is a specification.

My present invention relates to wearing brakes or shoes such as are commonly used on railway rolling stock and more particularly to brake shoes for this purpose which are reinforced and contain wear resistance inserts of harder material than the body of the shoe.

The principal objects of my present invcntion are to provide improved means for'connecting the body of the shoe, the wearing inserts and the reinforcement; to provide improved means for preventing sections of the body of the shoe from falling should fracture occur; to provide means whereby the reinforcement itself is used to connect the shoe to its support; to provide improved means for localizing the pressure of the brake shoe to those parts of the wheels which are least worn by the rails; and generally to improve, cheapen and simplify the construction of brake shoes for railway and other vehicles together with such further objects as will hereinafter appear.

In attaining the foregoing objects and certion additional advantages to bebelow disclosed, I have provided the constructions illustrated in the accompanying drawings, wherein Figure 1 shows in elevation a shoe constructed in accordance with the present invention; Fig. 2 is a plan view of the shoe illustrated in Fig. 1; Fig. 3 is a vertical transverse section on the plane 33 of Fig. 1; Fig. 4 is an elevation of a modified form of shoe; Fig. 5 is a plan view of the shoe shown in Fig. 4; Fig. 6 is a vertical transverse section on the plane 6-6 of Fig. 1; Fig. 7 is a plan view of the reinforcement used for a modified form of shoe; Fig. 8 is a vertical transverse section through shoe embodying the reinforcement shown in Fig. 7; and Fig. 9 is a perspective view of the supporting strap used in the form of shoe illustrated in Fig. 8.

Reference will now be made to Figs. 1 to 3 which illustrate the first of these various forms. The brake shoe consists of a body portion 10 provided with two series of weararranged ing inserts 11 and 12. The first set of inserts is arranged over the flange of the wheel as will be clearly seen from Fig. 3. "The sec ond set of wearing inserts is arranged to contact with the outer-part of the flat portion of the wheel. It will be observed that the wearing inserts 11 and 12 come into frictional engagement with those parts of the wheel which are little worn by the rails.

Not only are these hard inserts of harder or different metal localized to those parts of the wheels where there is little normal wear but in addition a groove 13 is formed along the under surface of the body of the shoe opposite the point at which the wear is greatest. This groove allows the parts of the brake shoe on either side to wear away considerably before the brake shoe has any abrading action on the portion of the wheel which normally comes into contact with the ra1 s.

The brake shoe is reinforced by means of inverted channel members 14 and 15, preferably arranged as shown-along the upper surface of the brake shoe. Although the reinforcement is in contact with the body of the shoe along its vertical faces only it is securely connected to the body portion by means of the wearing inserts. For this purpose apertures 16 and 17 respectively are in Y the reinforcing members through which upwardly expanding projections 18 and 19 from the inserts 11 and 12 extend. To enable these projections to grip the reinforcement the edges of these apertures are depressed below the normal surface of the channeled iron in such a way as to form what are practically countersunk apertures adapted to engage the conically formed ends 18 and 19 of the inserts. While the projecting ends 18 and 19 of these iiiserts are arranged upwardly expanding in order to engage the reinforcement the body part of the inserts is arranged so thatv it expands downwardly. The object of this is to draw the body of the shoe and the reinforcement together and also to prevent sections formedwith flat surfaces perpendicular to l l the vertical side faces of the shoe and inclined downwardly and outwardly with respect to each other.

While it is desirable to provide means for preventing sections of the brake shoe from moving downwardly with respect to the inserts it is also desirable to prevent move-' ment of he body of the brake shoe upwardly relatively to the inserts, particularly in view.

of the fact that the support for the brake shoe is attached to these inserts rather than to the body of the shoe itself. Accordingly,

in the case of the inserts 11 the lower ends are shaped so as to form an inwardlyinclined surface against which the portion 21 of the body of. the brake shoe bearsin order to prevent such upward movement 7 relatively tothe inserts 11. The shoulders 33 and 34 on the inserts 12 and the part 22 of the body of the shoe perforina similar function in connection with the other set of inserts 12. p

The reinforcement 14 is arranged along the upper surface of the shoe and is arranged to extend through theupraised parts 23 and 24 at the two ends of the shoe (see Fig. 1). In the :case of the reinforcement V 15, however, each end is turned upwardly so as to provide the necessary resistance to longitudinal movement of the shoe on its support. At one endthe center web is cut away and the flanges of the channel iron turned up soas to provide ,abu'tments 25. Atfthe other end the: flanges of the channeled reinforcement are cut olf beforejthe upturned end is reached in order to leave a flat tang 26 which can bebent over the end of the support when'the shoe has been shoe and the provision of aset of inserts" which extend practically up to the flange of the wheel thus covering the whole flat sur- 7 face of the wheel.

With regard to the reinforcement itwill be seen that the reinforcement 14 over the flange of the wheel isthe same as that illus-' trated inFig. 3 in its general arrangement and also 1n cross sectlon. The other reinforcement 27 is distinguished from the corresponding reinforcement 15 in that its ends 28 and 29 are not upwardly turned nor do they extend into the up'raised ends 23 and 24 of the shoe. Further, instead of the reinforcement itself being employed as the con .32'these are distinguished from the corresponding inserts 12 in the other form of 7 construction by the fact that they are provided with Vertical endson either side and,

are arranged so asto extend over substantially the whole width of the flat portion of the wheel. 7

I11 Figs. 7 to 9 a form of construction is illustrated which is designed particularly to allow the brake shoe to wear away to a greater extent than is possible in the forms illustrated in the preceding figures. An examination of Fig. 6 will show that as soon as the turned over ends 31 of the supporting, strap 30 have been-worn away no positive means exist preventing the strap 30 from pulling out of the shoe. Similarly when the shoe has worn'away to the bottom of "the conical parts 17 of the reinforcement 15 there is nothing 'to hold together the parts 19 of the inserts 12 and the other parts 7 of such inserts. f

In order to enable the supporting lug, reinforcement, and wearing inserts to be securely locked together until the shoe has been worn so thin that it has not the requisite mechanical strength, the construction illustrated in Figs. to 9' has been provided. In the form shown in Figs. 7 to 9, the supporting strap 48 is formed with olfset ends 40 adapted 'to'be' passed through apertures 41 in the reinforcement .42. These slots 41 are made slightly wider than the thickness of the supporting strap inorder to enable. the offset ends to be passed therethroughjas shown in'Fig. 8. To prevent the disengagement of the strap andthe reinforcement I prefer not to rely on the metal of 'the insert which is cast. around these o'fi'set ends, so'I bend parts of'tlie reinforcement itself into secure engagement with these ends. "For that purpose I form a slit or aperture 43 at the center of the rein- 'force'ment and bend the edges 44 of such slot or. aperture around so as to engage the offset ends .40 as shown in Fig. 8. It will be observed that any pressure exerted upwardly on the strap will-tend to draw the edges 44 upward and thereby produce a stronger lock between the reinforcement and the strap than was originally the case. 'At-' tention should also be called to the fact that as a slot'is employed instead of a circular aperture having conically depressed sides the metal between'the edges 44 will be connected tothe remainder of theinserts at'the ends'of the sloteven if by wear the-insert has been worn down to the edges 4:4: adjacent the center of the slot. While the edges 44 are downwardly and outwardly inclined at their center toward their ends they are downwardly and inwardly inclined so as to grip with the insert until the latter has been worn almost completely away.

Although in the forms of construction shown in Figs. 7 to 9 the means used for connecting the supporting strap andthe reinforcement are arranged so as to unite the reinforcement to the wearing inserts, it is understood that where several wearing 1nserts are employed those wearing inserts which are not adjacent the supporting strap may be connected to the reinforcement by means of slits similar to slit 43 in Fig. 7 to prevent loosening of the inserts by wear.

Having thus described my invention and illustrated its use what I claim as new and I desire to secure by Letters Patent.

1. A brake shoe comprising in combination a body portion, reinforcement adjacent the upper part of said body portion, a series of wearing inserts comprising parts upwardly expanding in all directions for engagement with said reinforcement and downwardly expanding parts for engagement with the body portion.

2. A brake shoe comprising in combination a body portion, reinforcing members of inverted channeled cross section having-a series of apertures the entire edges of which are depressed below the normal surface of the reinforcement and a series of wearing inserts comprising an upwardly expanding part for engagement with said reinforcement by means of said apertures and a downwardly expanding part for engagement with said body portion.

3. A brake shoe comprising in combination a body portion, reinforcement adjacent the upper part of said body portion having a series of apertures therein with curved upwardly and outwardly extending walls, a series of wearing inserts comprising an upwardly expanding part for engagement with said reinforcement by means of said apertures and downwardly expanding parts for engagement with said body portion.

at. A brake shoe comprising, in combination, a body portion, reinforcement adja cent the upper part of said body portion having swaged apertures therein, a series of wearing inserts comprising upwardly expanding parts for engagement with the swaged apertures of said reinforce-ment, and downwardly expanding parts for engagement with the body portion.

5. A brake shoe comprising, in combination, a body portion, reinforcing members of inverted channeled cross section having a series of substantially circular apertures the edges of which are depressed below the normal surface of the reinforcement and a series of wearing inserts comprising an up wardly expanding part for engage-ment with said reinforcement by means of said apertures, and a downwardly expanding part for engagement with said body portion.

6. A brake shoe comprising in combination a body portion, channeled reinforcement adjacent the upper part of said body portion, upwardly turned ends on said reinforcement adapted to prevent longitudinal movement of the shoe relatively to its sup port, the flanges of the reinforcement being cut away adjacent one end thereof whereby the intervening web can be bent over the support for the shoe.

7. A brake shoe comprising in combination a body portion, channeled reinforcement adjacent the upper part of said body portion, having the central web cut away adjacent one end thereof and the flanges cut away adjacent the other end thereof, the flanges and central web so left being turned upwardly whereby longitudinal movement of the shoe relatively to its support is prevented' 8. A brake shoe comprising, in combination, a body portion, reinforcement adjacent the upper part of said body portion having a series of substantially circular apertures therein with upwardly and outwardly extending walls, a series of wearing inserts each having an upwardly expanding part for engagement with said reinforcement by means of said apertures, and downwardly expanding parts for engagement with said body portion.

9. A brake shoe comprising in combination a body portion having a groove opposite the part of the wheel where the normal wear is greatest, a wearing insert of substantially the same width as the tread portion of the wheel adapted to contact with the outer part of said tread portion of the wheel having a cutaway part adjacent said groove. 7

10. A brake shoe comprising, in combination, a body portion, inverted channeled reinforcement therefor, apertures in said reinforcement having depressed edges and inserts east between the depressed edges of said apertures and the flanges of the rein-' forcement whereby the insert is firmly locked in place.

11. A brake shoe comprising in combination a body portion, an external reinforcing member therefor having apertures therein with curved edges, the portions around said apertures being depressed and inserts of different material cast in site so as to extend through said apertures whereby the insert is firmly locked in place.

12. A brake shoe comprising in combination a body portion, inverted channeled reinforcement therefor, apertures in said reincircular forcement having depressed curved edges and inserts cast between the depressed edges of said apertures and the flanges of the reinforcement whereby the insert is firmly locked in place. p

13. A brake shoe comprising, in combination, a body portion, an'external reinforcing member therefor having a substantially aperture therein, the portions around said aperture being depressed and an insert of different material cast in situ so as to extend through said aperture whereby the insert is firmly locked in place.-

14. A brake shoe comprising in combination a body portion, channeled reinforcement adjacent the upper part of said bodyportion, an upwardly turned end on said reinforcement, the flanges of the reinforcement being cut away adjacent said upturned end whereby the interyening web can be bent over the support for the shoe. I

15. A brake shoe comprising, in combination, a body portion, inverted channeled reinforcement therefor, substantially circular apertures in said reinforcement, having depressed edges and inserts cast between the depressed edges of said apertures and the fianges'of the reinforcement whereby the insert is firmly locked in place; i 7 I In testimony whereof I have hereunto signedomy name in the presence of the two subscribed witnesses o p I p BENTON C,- HOWELL.

Witnesses; H V

DONALD (1.. WILLIAMS, RIDSDALE ELLIs. I

came; of this patent may be obtained for five cents each, by addressing the Commissioner or Patents.

Washington. D. 0."

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