US2110575A - Brake head wear receiving element - Google Patents

Description

8, 193. v, RT

BRAKE HEADWEAR RECEIVING ELEMENT Filed Dec. 16, 1932 2 Sheets-Sheet l Wi nesse ZJTMSW arch 8 1938.

V. H. HARBERT BRAKE HEADWEAR RECEIVING ELEMENT Filed Dec. 16, 1952 2 Sheets-Sheet 2 Inmfentor Patented Mar. 8, 1938 UNITED" STATS T OFFIQE BRAKE HEAD WEAR RECEIVING ELEMENT Application December 16, 1932, Serial No. 647,579

13 Claims.

My invention relates to means adapted to be applied to the standard type of brake heads, whereby the wear which is encountered by the shoe supporting lug of the headwill all be taken care of or absorbed by my improved wear receiving element made of metal best adapted for such purpose.

My invention contemplates means which may be easily applied to a brake-head and which at the same time can be removed and replaced should occasion require; the element involving integral portions whereby the element will be firmly locked on the brake-head lug; the element at the same 7 N time affording a binding contact with the usual shoe locking key.

The objects and advantages of my invention will be fully understood and comprehended from the detailed description of the accompanying drawings, wherein:

Figure 1 is a side elevation of a brake-head and shoe locked in place and provided with my improved element.

Figure 2 is a front or face elevation of the brake-head with the wear receiving element shown in Figure 1 applied to the supporting lug.

Figure 3 is a cross sectional View of the brakehead lug and wear receiving element shown in Figures 1 and 2.

Figure 4 is a perspective view of the supporting lug portion of the brake-head.

Figure 5 is a perspective view of the element adapted for'use on the brake-head lug shown in Figures 1 to 4.

Figure 6 is a perspective view of a modification in the brake-head lug.

Figure 7 is a perspective view of a modified form of the wear receiving element adapted for application to the type of lug shown in Figure 6.

My improved wear receiving element is intended for the standard brake-heads and shoes at present in use and is especially intended for application to new heads, although it may be equally as well applied to brake-heads in use which have not become excessively worn.

Brake-heads, intermediate of their ends, are provided with a pair of spaced apart lugs as shown in Figures 1 and 2 at it) and BI, to receive the shoe lug i2 therebetween, see Figure 1.

These three lugs have slots disposed vertically therethrough;--the slots in the head lugs being shown at it in Figure 2;-to receive the usual shoe locking key M.

The brake-heads are usually of cast metal construction with more or less tolerance between the lugs to permit easy application or reception of the shoe lug therebetween.

As the shoes are of harder metal than that of the heads, the constant vibration or up and down movement of the shoe during car operation and brake application causes the head lug l2, especially, to soon become excessively worn. As a result, the utility of the head is destroyed and replacement of the entire head required; or formation of new lugs by welding made necessary. This, of course, also results in car service loss and hence increased expense due to defective brake conditions. 1

My invention contemplates the provision of a wear receiving element l5, interposed between the lower face of the shoe lug l2 and the wear receiving upper face of the supporting lug ll of the brake-head; namely an element which may be made of heat treated or suitably hard steel adapted to resist the wear generally caused by the shoe lug; while at the same time providing a firm or snug fitting relation between head and shoe 'soas to eliminate the usual play between these elements.

My improved wear receiving element l5, as disclosed in the first five figures of the drawings, involves a rectangular metal plate of suitable thickness and of width commensurate with the transverse depth of the head lug l I.

This plate I 5, of proper metal or steel, is formed with downwardly and somewhat inwardly bent ends 116, I 6 As the head lugs are formed with the ends I! sloping outwardly toward the rear or body of the. head (see Figures 2 and 4), the plate i5 is preferably formed with the front longitudi- 1 nal side l5 of length less than the other or opposite longitudinal side; the difference in length between the two sides corresponding to the difference in transverse dimensions between the forward or outer end of lug H and the rear or attached end thereof.

The opposite ends I! of the head lug H are each provided with a cut-in portion or groove as at E8, which are adapted to receive the downturned ends l6, It of the plate I5. These grooves I8 permit the plate to be slid onto the lug H, from front to rear.

In order to lock the plate l5 against movement toward the outer end of the head-lug l I, after the plate has been completely forced into place, at least one of the ends of the plate is slit in a longitudinal direction, between the two longitudinal sides, so as to provide the tongue 19; the tongue forming portion being made of length less than the remainder of the plate so as to terminate substantially at the beginning of the bent portion the plate forming the bent end IB In order to receive the. tongue I9, the corresponding end of the head lug II is provided with the cut-out portion or socket 243, see Figure 4, (sloping downwardly toward the end of the lug).

The downwardly bent ends I6, us of the plate I are intended to firmly engage in the grooves I8, E8, to hold the plate against up-and-down movement or play; and after the plate l5 has been firmly driven or slid onto the lug II, the tongue I9 is then driven into a declining position as shown in Figures 3 and 5, namely into the socket 20. As the tongue I9 is substantially of the same width as the socket 2B, the tongue will contact with the side walls of the socket 2B and prevent forward sliding movement of the plate. The brake-head is then ready to receive the shoe-lug I2; the plate I5 being provided with the key receiving opening or slot 2| adapted to register with the slot IS in the head and a slot which is formed in the shoe-lug l2.

In Figures 6 and '7 I illustrate a modification of the invention, with the brake-head lug Il having its ends provided with similar grooves I8, I8, as in the previously described construction.

In Figure 6, the opposite end walls of the shoe fastening key receiving slot l3, are each provided at top with a forwardly declining socket 22, so as to provide an abutment or shoulder at 23.

The plate for this construction of head lug is shown in Figure '7; the plate 24 being practically of the same general construction as the plate I5, except that the downwardly disposed ends 25, 25 are left integral throughout and not provided with the end tongue I9.

Plate 24 is preferably made of tempered spring steel; and at opposite ends of the shoe key receiving slot 26, partially severed portions or tongues 21, 21 are provided.

The metal is out so the tongues 21, 21 may b bent downwardly toward the shoe or forward longitudinal side of the plate in order that the free downwardly disposed ends of the tongues 21, 21 will engage the shoulders 23, 23 at opposite ends of the key slot I3 in the head lug I l With plate 24 formed of suitable spring steel, the plate may be driven onto the head lug Il with the ends 25, 25 seated in the lug grooves I8, I8; the ends of the tongues 21, 2! riding across the top of the head lug II until the slot 25 of the plate registers with the slot I3 of the headlug, at which time the tongues 21, 2'! will snap down into the inclining sockets 22, 22 and abut against the shoulders 23, 23. The bent ends 25 and the tongues 2'! will hold the plate 24 firmly on the head lug against movement.

As is apparent, the plates I5 or 24 will not only prevent undue vertical movement of the shoe, but will absorb all wear heretofore caused by the shoe and as a result enhance the life of the brakehead.

In order to more rigidly hold the shoe in snug relation with the head, the transverse width of the slot 2| in plate I5, and slot 26 in plate 24, is preferably made less than the width of the slot I3 in the head, so that the shoe fastening key I4 will bear against one side of either slot 2i or 26 and not only prevent wear in the wall of the slot I3 in the head lug, but also provide a greater binding relation with the key, as the forward wall of the plate slot, 2I or 26, is arranged to be dis posed slightly rearward of the forward edge of the slot l3 in the head lug.

I have shown what I believe to be the simplest embodiments of my invention and have described the same in terms employed for purposes of description and not as terms of limitation, as modifications are possible and may be made without, however, departing from the spirit of my invention.

What I claim is:

1. A brake-head wear receiving element comprising, in combination with a brake-head lug having a key receiving slot and grooved ends; a plate coextensive with the upper face of said lug and having a key receiving slot, the ends of the plate being disposed downwardly and inwardly to engage in the grooved ends of the lug.

2. A brake-head wear receiving element comprising, in combination with a brake-head lug, opposite ends whereof are grooved from front to rear; a plate having downwardly and inwardly disposed ends adapted to enter and form gripping relation with said grooved ends of the lug.

3. A brake-head wear receiving element adapted to be disposed on the upper face of a brakehead lug provided with a socket in its upper face and comprising a plate provided with a downwardly flexible tongue adapted to engage in said socket and thereby secure the plate against displacement.

at. A brake-head wear receiving element adapted to be disposed on the upper face of a brakehead lug and comprising a plate having downwardly disposed ends adapted to form gripping relation with opposite ends of the lug and having a downwardly flexible tongue adapted to provide locking engagement between the lower face of the plate and the upper face of the head lug.

5. A brake-head wear receiving element comprising a plate adapted to be disposed on the upper face of a brake-head lug and provided with downwardly and inwardly disposed ends and a downwardly flexible tongue intermediate of the ends of the plate.

6. A brake-head wear receiving element comprising a flat plate adapted to be disposed on the upper face of a brake-head lug provided with a socket in the upper face, said plate being provided with a bendable portion adapted to engage in the lug socket so as to prevent movement of the plate toward the outer end of the head lug.

'7. A brake-head wear receiving element adapted to be disposed on the upper face of a brakehead lug, comprising a fiat plate provided with downwardly disposed ends, the plate adjacent one of the ends being longitudinally slit to provide a bendable tongue.

8. A brake-head wear receiving element adapted to be disposed on the upper face of a brakehead lug, comprising a flat plate provided with a brake-shoe key receiving slot and a portion of the plate at the end of the slot partially severed to provide a downwardly flexible and forwardly presented tongue.

9. A brake-head wear receiving element adapted to be disposed on the upperface of abrake-head lug, comprising a flat plate provided with a. brake shoe key receiving slot, with portions of the plate at opposite ends of the slot provided with downwardly flexible and forwardly presented tongues.

10. A brake-head wear receiving element adapted to be disposed on the upper face of a brake-head lug, comprising a flat plate provided with a brake shoe key receiving slot and with a downwardly flexible and forwardly presented portion, the ends of the plate being bent downwardly in inwardly inclining directions.

ll, A brake-head wear receiving element com prising, in combination with a forwardly tapering break-head lug whose opposite ends are provided with grooves disposed from front to rear and the upper face of the lug providedwitharecessformed to provide a vertical shoulder at the forward side of the recess; a flat plate having downwardly bent ends converging toward the forward longitudinal side of the plate and adapted to engage in the grooves of the head lug, a portion of the plate being partially severed to provide a bendable tongue adapted to enter the lug recess and abut against said vertical shoulder.

12. A brake-head wear receiving element oomprising, in combination with a forwardly tapering brake-head lug whose opposite side walls are each provided with a groove disposed from front to rear and the upper face at one end of the lug provided with a declining recess; a flat plate whose opposite longitudinal sides are of unequal length and the ends bent downwardly and converging inwardly toward the front longitudinal side of the plate, said ends being adapted to slide lengthwise of the grooves in the ends of the head lug, while a portion of the plate is partially sevgage in the recess of the head lug.

13. A brake-head wear receiving element comprising, in combination with a brake-head lug tapering forwardly and withthe opposite sidewalls each provided with a groove extending from front to rear of the lug, the lug having a key receiving opening therethrough, with the end walls of the opening on the upper face of the lug having recesses sloping downwardly toward the front; aflat plate whose opposite longitudinal sides are of unequal length and the ends of the plate bent downwardly and converging inwardly toward the front side of the plate, said ends being adapted to slide lengthwise of the grooves in the lug sides, said plate having a key receiving opening adapted to register with the opening in the lug and portions of the plate at opposite ends of its opening provided with tongues sloping downwardly toward the front of the plate and adapted to engage in the lug recesses.

VICTOR H. HARBERT.

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