US1036564A - Reinforced back for brake-shoes. - Google Patents

Description

W. G. GHVIPPS. mroncsn BACK PoR BRAKE SHOES.' APPLICATION FILED APR.1 2.1912. Y 1,036,564 Patented Aug. 27, 1912.

Atty

U'NITED STATES PATENT (DFFICE.

` WILLIS '0.' cHIrlrs, or so-rrEnN, NEW Y'onx, AssIGNon tro EDWAnn'iI. rALLoWs, or

NEW vom; N. Y.

REINFORCED BACK FOR BRAKE-SHOES.

T o all whom #may concern: y

Be it known that I. lVlLLIs C. Cmrrs, a citizen of the United States, and a resident y of Sutl'ern, in 'the county of vRockland and .5 State of New Yorlij, have made and invented certain new and useful Improvements in Reinforced Backs 'for Brake-Shoes, ot" which the following is a specification.

My invention relates to reinforcing backs for brake shoes designed to be embedded in the rear surface or back of the shoe, and serving to hold the parts' of the shoe together should it become cracked or broken in use, and 4to which the attaching lug, whereby the shoe is supported from a brake head, is secured, or with which said lug engages.

The object of my invention is to provide an improvedV back in which suticient support is afforded for the attaching lug so that it may not. be broken or pulled from the shoe, and in which a sulicientbond is secured between the body of the shoe and the back, considered as a. whole, to prevent the entire back from'being torn or stripped from the shoe. A

Reinforcing backs for brake shoes have heretofore usually been of one of two distinct Jforms. In one form a wrought metal or steel plate is employed', in order that the supporting lugmay not be broken or pulled from the shoe. Such a plate, however, notwithstanding numerous schemes employed for anchoring the same in the body of the shoe, presents tlat surfaces ol. considerable 'area with which the metal ot' the body cannot secure a sutlcient bond to hold the plate in place, so that' while such reinforcing members provide a shoe in which the attach- 40 ing lug is not likely to be broken or pulled from the shoe, the ent-ire back may be, and

in fact frequently is, torn or stripped from the shoe because of the insufficient. bond between it and the body of the shoe.

In another form of reinforcing back a piece of expanded metal or similar foraminous material isemployed, which back while it provides for a goo'd and sullicient bond between it and the body of Vthe shoe, does not afford sufficient; strength at the place -where the attaching lug is secured to it, or engages with the same, so that notwithstanding such schemes as have been devised for securing a.

sutliciently strong connect-ion between the lug and the expanded metal back, the lug is frequently torn or broken from the shoe,l

Specification of Letters Patent.

carrying with it the portion of the reinforc-4 ing member with which it engages. although the remaining portion of the back remains embedded in the shoe.

In a brake shoe provided with my improved reinforcing back both the strength of a steel plate back, and the strong bond secured in an expanded metal back, are secured in a single structure, and a shoe is procured in which the attaching lug is not likely to become separated from the back, nor the back pulled away or stripped from the shoe.

Having inview the objects above stated, my invention consists in the improved reinforcing back for brake shoes hereinafter described and claimed, and'shown in the accompanying drawing, wherein the preferred embodiment of my inventionis illustrated.

Referring to the dra'\vings:-Figure 1 is a view showing a side. elevation of the brake shoe', and illustrating one of my improved Patented Aug. 21, 1912. Application medhpvrn 12 1912.- seriaino. 690,357.

l'n the drawing. the reference character 4 designates the bod; portion of a brake shoe in the rear face or back of which my improved reinforcing back is embedded. This reinforcing back is made up of two separate members one resting upon the other, one of said members being designed to provide for a strong connection between the attaching lug and the body of the shoe, and the other with especial reference'to securing an extensive bond between the back as a whole and the shoe` to prevent the back from being stripped from the shoe. Thehmember firstreferred to is designated by the reference character 5, and is in'the form of a plate extending longitudinally of the shoe and to the central port-ion of which plate, a

lug (i, whereby the shoe is supported from af brake head, is secured. The connection between the lug and the plate 5 may be 'formed in any way; in Fig. .3 I'have shown the lug as having inturned portions at its lower end which lie beneath the plate.

The second member of my improved remforcing back is foraminous, so that the metal from which the body portion of the shoe is formed may lengage therewith at a large'- number of points or places, and which memberiwill therefore be embedded in the body of the shoe in such a manner that a strong bond will be procured between the same and 5 the shoe. This foraminous member isshown as comprising a piece of expanded metal 8, the central portion of which is cut away as shown at`9 in order that it may lit over the lug 64above referred, to'and through'which 10' opening said lug projects. This foraminous or expanded metal member occupies a position above the plate 5 hereinbefore referred to, so'that any tendency of the said plate to be stripped from the shoe by means of forces A transmitted to it through the lug, is resisted not only by such anchorage as may exist be` tween it and the body of the shoe, but also by the foraminous or expanded metal plate 8 which is embedded in, and thoroughly bonded over, the ent-ire surface of the shoe.-

I It will, therefore, be seen that considering the hachas made up of the two separate members referred t-othe same is bonded I throughout the entire area 'of theback because of the foraminous member 8, Aand that Aforces `transmitted through the attaching lugact directly upon the 'plate 5 at a point where the area is such that the lug cannot be pulled trom` the shoe by such forces .as are commonly encountered when the shoe is in use.

I prefer toprovide openings suon as are shownl at 10 in vthe plate member 5, so that the metal from which the body is formed mayextend therethroughA and embed a corresponding area of the overlying foraminous member 8 to thereby form a strong connection between the body of the shoe and the central portion of said oraminous mem- 40 ber; whereby the foraminous member is bonded directly with the body of the shoe along its entire periphery, and also throughcut central portions of considerable area. It will be understood thatinmaking a brake shoe provided with my improved reinforcing back, the supporting lug 6 and plate 5 are assembled and the fora-minous member 8 placed upon the plate 5,(after which the entire member, thus formed, is placed in a m'old into which the molten body metal ispoured, whereupon the' entire back becomes embedded in the rear surface or back of the finished shoe.

It will be further understood that in the back, constructed as above described, I obtain the advantageous features of both a wrought metal plate and a plate of eX- panded metal, that is, I` secure, by means of the metal plate, suilieient strength whereby to retain the parts or segments of the shoe Atogether in case the latter be broken in service, and also a back which may be firmly embedded and securely 'anchored in the body of the shoe', afeature. characteristic of ex'-Y bedded in the rear `face of a brake shoe and comprising a plate member,A an' attaching lug formed separate from and m engagement wlth said plate member, and a foramlnous member overlying said.. plat-e member and a portion of which is cut away to pro- -vide an opening through which said 'attach-1 ing lug' projects.

3. A reinforcingback adapted to be embedded in the rear lface of a bra-ke shoe and comprising a. plate member, an attaching lug formed separate from and in engagement with said plate member, and an expanded metal member overlying said plate` member and a portion'of which is cut away to provide anopening through which said attaching lug projects.. i

4. A reinforcing back adapted to be eina bedde'd` in the rear face of a brake shoe and comprising a plate member, means engaging said plate member'or supporting the shoe, and a second member overlying said plate member and made Afrom expanded metal.

5. A reinforcing back adapted'to be embedded in the rear-.face of a brake shoe and comprising a plate member4 having a centrally located projecting lug, and a foraminous'member overlying 4said plate member and having fa centrally located opening through which said lugr extends.

6. A reinforcing back adapted to be embedded inthe rear face of a brake shoe and comprising a plate member, a centrally located attaching lug in engagement with said plate member; and a foraminous member overlying said plate member, the central portion of said foraminous member being cut away to 4provide an .opening through which said lug' extends. Signed at Mahwah, in the count-y of B er gen, and State of New Jersey, this 10th ivy of April, A. D. `1912.

WILLIS CHIPIS.

` lllitnesses:

' MARY A. CoUN'rnY, Crus. N. vVINTER.V

Copies of this patent may be obtained forve cents each, by addressing thc y Comm.l zsioner of Patents,

T',;s1aington, D. C.

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