US1033304A - Back for brake-shoes. - Google Patents

Description

w. c. GHIHS.v BACK ron BRAKE suomi" APPLICATION FILED APB. 12. 1912. l g 1,033,304. y Patented July 23, 1912.

2 SHEETS-BHEETAI.

W. G. CHIPPS.

BAGK FOB. BRAKE SHOES.

APPLIUATION FILED APR.12, 1912. 1,033,304. Patented July 23,1912.

2 'sums-SHEET 2.

test: d I11 yentor: M "w' by fg e, W i( l y Atty .2. T0 all lwhom may concern: l

' a 'citizengof the zUnited dent of Suffern,

strong bond between the of the shoe,

" tofore possible in a 'single back structure;

UNITED vstrxrijs PATENT oFFIoE.

New YORK, AssIGNo'R T o EDWARD H.' rALLows, or

, NEW YORK, N. Y

l BACK FORBRAKELSHOES.

)'Be it known that '1,I WrLLIs -G-Hirrs,

States,'and a resiof which the fol- My in vention relates to reinforcing Wrought metal or steel backs for brake. vshoes ,designed'to be embedded in the rear faeeor back of the shoe as the same is cast,

i 'tera' "the oe and hold the parts thereof together and the object of my invention is' to provide the genurpose of 'which back isto reinforce should it become cracked or broken in use;

'an improved back in which the advantages of a strong connection between the back and the lug, whereby the shoe is attached to a brake ad or equivalent support, and of a back and the body are secured to a degree not hereso that in'my improved back the key lug on the one .hand will not be likely to be pulled away-0r brokenfrom the back, and

.the back, asa whole, on the otherhand will A.not be llkely to be pulled out or torn from thebody of the shoe in which it is embedded.

--It has heretofore been Vcommon'to construct brake shoes with a lsteel back in the major portion of the rear face choring the plate to the shoe, it being the:

' -cast metal,`yet itis not'possessed of form of a. plate and extending over the of the shoe, in order .to reinforce the same,

shoe become broken or fractured in service.

fcient 'for this purpose, yet ditliculty has been experienced in -frmly securing or anusual practicev to provide an .opening or openings in the plate for .the [purpose of a l owing the cast metal to flow through -the same'J and assist in binding the parts toit has been proposed to em- 'expanded metal at or ad- 'gethen Again, lploy av layer of 4vjacent the back of the shoe forthe purpose of reinforcing the same, but without success, for while this form of ,reinforcement be-v comes firmly vembedded or anchored in'the specification of Letters Patent,- application nieaiipr'n' 12, 1912. .serial No. 690,358.

in the county of Rockland and State of New York, have made and in'- vented certain new and useful Improvements,v

in'Backs for Brake-Shoes, lowing is aspeciication.y

'inforcing back', that bonding features o and to se-` leuxely hold the parts togethershould the cient 'strengthl to hold the artsof the' ishoe Patented Julyea, 1 9'12.

together when cracked or roken, the constant'bending of the .cracked shoe causin the expanded metal-to alsocrack'and brea and allow the parts 4of the shoe to separatev and fall to the track.

My present invention is designed toretain the advantageous features of the'plate and also those of the expanded metal as a re. is, to obtain in a single struct-ure the stren th of the 'plate and the expanded metal, lso that the reinforcing back 'will .not only be securely embedded and anchored at or adjacent to the rear .face 'of the shoe, but at the same tiine will-be Vpossessed of sufficient strength to hold the parts'of the shoetol gether should the latter becomefbroke'n or fractured.

j With the above'and-other objects of invention in view, my invention consists inthe improved back for brake shoes here1n.

after described and claimed, and in such variations and modifications thereof as will be obvious to those skilled in the art to which the invention relates.

In the drawing whereinl the preferred form of my invention is illustrated ;"Figure 1 is a top plan View of an unflanged brake shoe in which one of my improved backs is embedded; Fig. 2 is a view showing 'the same in side elevation; Fig. 3 is a. view showing a section vupon. a transverse plane indicated by the line 3-3, Fig. 2; Fig. 4 is a view showing my improved back separate from Ithe brake shoe; Fig. 5 is a top plan view showing a flanged brake shoe in the rear face of which a slightly modiiied form of my improved back is embedded Fig. 6 is a -view showing the same 1n side elevation;

and Fig. 7 is a, view showing a section upon a transverse planev indicated by the line 7-7., Fig.6.,

Referring tions 9. The lattaching lug 10, `v'vherebly'the brake shoe is supported from a brake "head" or equivalent support, is secured'to the portion 8 of my improved 'back vin any suitable Away, preferably 'by lforming the lug with inturned hooks at 'itsloWer end t ).ext en 'first to Figli of the drawing, the back of theshoe is shown as'- mad of a, central'porton ,-8 -and'two -side.1por* eup bedded. This second portion of theback is beneath the side edges of the portion 8 of l the back asillustrated in Fig. 3. In whatever way the attachingl lug may be secured to the portion 8 bf the back, it will be understood that an exceedingly strong jointmay be securedbetween the lug and such portion, and a joint whigh will not be likely to become broken and the lug thus separated from the slice when the shoe is in use; that is, the lugv will be unlikely to tear away from the steel back and pull out of the shoe'. The second portion 9 of my improved back is of such a character as to vsecure as great an area of contact as 'possible between the back and the metal ofthe shoe in which it is emtherefor'e subdivided to a considerable extent, and made oraminous, in'order that the metal of the shoe may iiow about the back in a large number of places toA thereby firmly embed it in the rear face of the shoe. I prefer to form this second portion of the shoe of expanded metal, as that term is understood in the arts, thatV is, to form it by slitting the blank from which the backv is formed and moving -the parts thus cut free, laterally, to thereby increase the width of the back and increase the area thereof which will come into contact with the metal of the shoe as the back is embedded therein during the manufacture of the shoe.

The portions 8, 9, lie side by-side and extend longitudinally of the brake shoe when the back is embedded therein in the preferred embodiment of my invention illustrated in the drawings, and it will be further understood that the portions above referred to, considered together, form an integral or single piece back for brake shoes.

Fig. l of the drawing shows the back illustrated in Fig. 4 as embedded in the rear face of a brake shoe; and Figs. 2 and 3 show side and sectional views of the same, the reference character 11 in each instance illustrating the body portion of the shoe, and the reference character l2 designating lugs of the same material as the body portion of the shoeand which partially inclose the attaching lug l0, although this feature forms'noY part ot' my invention.- y y In the form of my invention shown in Figs. 1.to 4, there is an expanded 'metal portion 9 upon each side of the central portion 10, this being a form which I prefer to employ with unflanged shoes. In adapting my improved steel back to flanged shoes, however, I prefer that the expanded metal por-.

tion, or portion whereby increased area of contact is secured as above explained, be located entirely to one side of the portion of the back to owhich the attaching lug is secured. This form of back, when used with ianged shoes, more eifectively ties the ilange portions thereof together, in case the shoe becomes broken in u'se, while the portion which is not expanded is located over the tread of thewheel vat which placetheattachs` ing lug is secured.

. In Figs. '5,6 and 7 this second tormof myv invention is shown as embedded in the rear face of a flanged shoe, the reference character 13 designating the body portion of the shoe, 14 the liange portion thereof, andl 15V an attaching lug whereby the shoe is` secured to a brake head. The attaching lug is secured to the unexpanded portion 16 of the,

back in this form of my invention, and a second portion 17 of said back is' shown as extending over thelanged portion of the shoe,

this second portion being shown as in the form of expanded metal, the same as in the form of my invention shown in Fig. 4.

In whatever `form my improved yback may be made, I may, if desirable, provide lthe same with one or more large openings such as are shown at 18,11? ig. 5, in order to secure a better bond between the portion of the back to which the lug is attached and th'ef body ot' the shoe. These openings, however, will be vlimited in number, and will not be sufiicientl to seriously detract from theY strength of the portion of the back to which the lug is'at'tached, as one of the important features oft my invention, as above explained,

of the back tightly and securely anchoring.

itin place in the body of the shoe, and the solid or centra-l portion of the-back lending sutlicient strength to the structure to hold the parts or segments of'- the shoe together should the latter become crackedy or broken in service.

What I claim is 1. A back for a brake shoe comprising a plate, a portion of which is in the form of expanded metal. l

2. A. backioi; a brake shoe comprisingA a plate, one or mfre edgesaof which is in the form of expanded metal.

3. An integral back for brake shoes com# prising two portions each extending longitudinally o't' the shoe and to one of which an attaching lug may be secured, the otherof saidportions being oraminous throughout its entire area to thereby increase the area of contact between said back and the metal of the shoe in which it is embedded.

4t. An integral back for .brake shoesy comprising two portions lying side by--side and be secured, the other of said portions being foraminous throughout its entire area.

5. A n integral back for bra'ke shoes comprising two portions to one of which an at- 5 taching'lug may be secured, the other of said portions being in the form of expanded metal.

. 6. An integral back for brake shoes comprisino two 10 tudinaly of portions each extending longiembedded 'and to one of which an attaching lugrney be sured, the other of said p0rtion'being of expanded metal.

Signed at Mahwah, in the county of Bergen, and State of New Jersey, this 10th day 15 of April, A. D. 1912.

' WILLIS C. CHIPPS. Witnesses:

MARY A. COUNTEY, CHAs. N. WINTER.

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