US1010010A - Brake-shoe. - Google Patents

Description

l W. ARMBRUST.

. BRAKE SHOE.

APPLICATION FILED JAN. 1s, 1911.

` Lmgl, Patented Nov. 28, 1911.

3 SHEETS-SHEET 2.

G. W. ARMBRUST.

BRAKE SHOE. APPLIUATION FILED 11111.18, 1911.

. 1,010,010, Patented 11011.28, 1911.

j 0. W JO s SHEETS-s111121 s.

CHARLES W. ARMEEUST, or cRYsTAL LAKE, ILLINOIS, AssIGNoE or ONE-FOURTH To SYDNEY STEIN, E CHICAGO, ILLINOIS;

BRAKE-SHOE.

Speccatonof Letters Patent. Patented NOV. 28, 1911.

Application led January 18,. 1911. Serial No. 603,268. 4

To all whom it may concern:

brakeishoes known as wherein the back and face of the shoe are M BRUsT, a citizen of the United States, residing at Crystal Lake, in the county 'of Mc- Henry and State of Illinois, (whose postotlice address is No. 906 Fisher Building, Chicago, Illinois,) have invented certain new and useful Improvements in Brake-Shoes,

of which the following is a specication.

My invention relates to brake shoes, and

more particularly to that type or class of interlocking shoes,

. provided with interlocking means, so that a partially worn shoe can be detached from the brake head and applied to the wearing face of a new shoe, whereby a partially' worn shoe may be completely used up. 4

One of the novel features of my present invention resides in the construction, wherein .the interlocking parts on the back and face of t-he shoe respectively are constructved to be engaged in interlocking relation by moving one of the shoes transversely relatively to the other, and the otherA shoes are so shaped that when interlockingly engaged, the central portions of the interlocked shoes are spaced apart, `while the end portions thereof are in engagement-with each other. By reason of this construction the interlocking recesses, with which the center of the face of the shoe is provided, mav be made of minimum depth, thereby enabling the greatestl amount of material to be incorporated in a shoe of predetermined thickness, with the result that the shoe possesses a maximum transverse strength.

Another novel feature of this invention consists in eliminating the usual end guide lugs and providing in lieu thereof suitable side stops adapted to engage with .the outer faces of the brake head end prongs to main- Itain the shoe in alinement. y v

Various other novel features of construction will be apparent as the invention is better understood by the following description, when taken in connection with the accompanying drawings illustrating those embodiments of mv invention, which appear at the present time to be preferred.

,Referring to the drawings-Figure `l is a side elevation of an interlocking shoe, em-

bodying one preferred form of my invenon the line 4-4 of'Fig. 1. Fig. 5 is a sectional view on the line 5-5 of Fig. 1. Fig. 6 is an elevation of a modified form of my invention. Fig. 7 is a top plan View thereof. Fig.- 8 is a face view. F ig. 9 is a sectional view on the line 9-9 of Fig. 6. Fig. 10 is an elevation of still another modification of my invent-ion. Fig.'l1 is.an' elevation of a modification differing slightly from Fig. 10. Fig. 12 is a plan view of the shoe shown in Fig. 11; and Fig. 13 is a sectional mview on the line 13-13 of Fig. l1.

On the drawings 20 designates themain body of a shoe provided on its back with the integral centrally disposed locking stud 21 having undercut sides 22 for dove-tail locking engagement with a detachable attaching lug 23. The back of the shoe is also wardly projecting stops 27 adapted to cooperate with the sides of the usual end prongs of a brake head to maintain the shoe in alinement thereon. The face of the shoe is provided with a centrally disposedlocking recess 28, having undercut side walls for l.

locking engagement with the undercut sides of a locking stud 21 on a similarly shaped shoe. The face of the shoe is also provided adjacent its ends with locking recesses 29 having undercut walls for locking engagement with the sides of the spacing lugs 24.

It will be evident from Fig. 3that the locking recesses 28 and 29 are open at one end and closed at the other to prevent lateral displacement of the attached shoe beyond that side of the fixed shoe. the closed ends being notched to permit the passage of the side stops 2,7 therethrough. The shoes areV fastened to the brake head with the closed ends of the locking recesses disposed outwardly. the open ends of the recesses lving adjacent the flange of the wheel, which is relied upon to -prevent lateral displacement of the attached shoe inwardly.

lt will be evident from an inspection of Figs. 1. 6, 10 and 11 that the backs and faces of the shoes are formed on the arcs of concentric circles, but that the circles are of different radii, the back of the shoe being "formed on the arc of a circle having a greater radius than the circle upon which the face of the shoe is formed. This construction provides a -shoe whose face is curved Y apart'is to reduce the transmission of heat more sharply than its back, so that when two shoes are interlockingly engaged, the -end portions thereof willl lie flush against each other, while the central parts will be spaced apart. The' principal reason for forming the shoe so that the centralportions of interlocking shoes will be spaced apart when they are interlockingly engaged is that the loc-king recesses 28 may be made shallower than would be possibleif the back and face of the interlocking shoesl lay flush against each other throughout their length, to bring the.

from the wearing shoe to the face of the 'supporting shoe as it has been found that long'and continued application of a shoe to a wheel sometimes so heats the face of' the sup.

porting shoe that its temper' is injured loefre that shoe has ever been actually brought vin contact with the surface of the wheel. l

In the modifications disclosed in Figs. 6 to 9 inclusive, the thrust lugs are omitted entirely, while th'e side stops 40 are disposed upon the sides of the shoe body near its ends, said stops projecting over onto the back'of the shoe, as shown 1n Fig. 7. The face'- of the shoe is provided with transversely dis. posed recesses 41 into which the side stops 40 formed on the back of a similar shoe are adapted to fit when the shoes are interlocked. In the modiication disclosed in Figf 10 the back of the shoe is equipped with an in tegral attaching lug 50, provided' with the usual key slot while the face'of the shoe .is recessedvto-a suiiicient width to provide locking engagement between the undercut walls of. the recess and the inclined walls of the attaching lug. The locking'and spacinglugs 52 are alsoprovided in this instance and the back of the shoe is further provided with transverse spacing lugs 53, which are adapted to insure the maintenance of the proper disltance between the spaced portions of the interlocked shoes. Side stops 54, are disposed upon the sides of the shoe adjacent its ends, said stops overlapping the back of the shoe similar to the stops 40 previously described.

'In the present instance, however, the back' of the shoe between the side stops is cut away at 55 for the reception of the end prongs of the brake head and the tops of the side stops 54 vare disposed beneath or tangentially to .the curve of the bach of they shoe, so that the provision of transverse recesses in .the face. v.

13 inclusive, the shoe is equipped with'thevlocking stud 21, previously described in conf nection with Figs. l and l in lieu of thelin tegral attaching stud shown in Fig. 10, but

the shoe also hasthe transversely. disposed v'spacing ribs 53, the locking lugs 52 a-nd the side stops 54:. The back of the shoe between the side stops is also cut away similar to the construction 'shownin Fig. 1Q, but the'ends of the shoe beyond the cut-away portions 55' are raised to provide thrust lugs 56, andthe ends of the face of the shoe are grooved or recessed. at 57 for the accommodation of'v While I have shown and described'sever-al preferred embodiments 'of my present invention, it will be obvious that the invention is not limited to the exact constructions shown but that the -modications are capable' of 'various slight changes in 4proportion and\ construction without departin from the spirit of the invention or sacri cing anyof.'

the material advantages thereof.

I claim:

41. A brake shoe comprising abody' member l.having locking lugs on its back and locking recesses onits face to interlock with the locking lugs of a similar-shoe, the curvatureV of the face of the shoe being greater than the central portions 'of interlocked shoes are spaced apart.'

vcurvature of the back thereof, whereby the i 2. A brakeshoe comprisinAga-body member having a locking stud and .locking lugs on its back and having locking recesses on its face -adapted tol interlockingly engage with 'the locking stud and locking lugs of a similar shoe, the back and face ofsaid shoe being formed 'on the arcs of ldifferent circles,

locking lugs of ajsimilar shoe, the curvature 11`o .whereby to space apart the central portions of the face of the shoe being greater than. the

curvature of thev back and said locking irecesses being shallower'than their corresponding lugs'whereby the backand face of interlocked shoes arey spaced apartintermediate 4their ends.

' 4:. A brake shoe comprising a body member provided on its back with locking. lugs and on its face with locking recesses, the curvature of the face of the shoe beln'g greater than the curvature of the back there-l of and the locking recesses being -shallower than the corresponding locking lugs where, by the interlocked shoes lie against each.

. other at their ends but are spaced apart by diderent radii,

the locking lugs intermediate their ends.

5. An interlocking brake shoe comprising a body member, providedon its back with a centrally disposed locking stud and a plurality of locking lugs and on its face with recesses adapted to interlock with the locking stud and lugs of a similar shoe, the back and face of said member constituting arcs of concentric circles of dilferent radii, whereby the central portions of the interlocked shoes are spaced apart.

6. An interlocking brake shoe comprising a body member provided with locking lugs and having side stops located on each side thereof, one face of said member being correspondingly recessed to accommodate the locking lugs of a similarly shaped member. 7. A brake shoe comprising a body member provided on its back with transversely disposed locking lugs, side stops located adjacent the ends of said member and projecting upwardly from each side thereof, the face of said member being provided with transversely disposed locking recesses to accommodate the locking lugs of a similarly shaped member.

8. An interlocking brake shoe, a body member formed onthe comprising -Whose back and face are arcs of concentric circles of the back of said member being provided with transversely disposed locking lugs and side stops located on each side to engage the end prongs of a brake d and. prevent lateral movement ofthe the face being recessed to receive the locking lugs of a similarl shaped member, said memberswhen interfbckingly engaged being spaced apart throughout a portion of their length. l

9. An interlocking brake'shoe,

comprising provided upon' its back with locking lugs and upon its sides with stops,

on its face with locking recesses adapted to receive the locking lugs' of a similarly shaped shoe, said locking lugs serving to space said interlocking shoes throughout a portion of their length.

10. -A brake shoe, comprising a body member provided on its back and locking lugs and upon its sides with stops, the tops ofsaid stops being disposed tangentially to the curve of the back of the shoe, the face of said member being recessed for interlocking engagement with the 'lock-1 ing lugs of a similarly shaped member, the back and face of said member being formed on the arcs of different sizedcircles, whereby the central portions of the interlocked members are spaced apart.

11. An interlocking brake shoe, com ris-l in g a body-member, provided on its ack with lockmg lugs and upon its sides adjacent the ends thereof wlth stops, the back apart l shoe, the back of said memberbeing recessed between Said l lugs located intermediate said attaching lug and the ends of the shoe, the face of said member being provided with recesses to accommodate the attaching lug and locking lugs of a similar shoe.

13. An interlocking brake shoe, comprising a body. member provided with an attaching lug and interlocking lugs disposed upon either side of said attaching lug and spaced from the ends of the shoe suiiiciently to permit the end prongs of a brake head to lie outside-said locking lugs.

14. An interlocking brake shoe, comprising a body member provided on its back with a centrally disposed attaching stud and a'I plurality of locking lugs and recessed on its face to accommodate the attaching stud and locking lugs of a similarly shaped shoe, said attaching stud serving to space the back and face of said interlocked shoes apart.

15. An interlocking brake shoe comprising a-body member provided on its back intermediate its en ds with a pluralityfof lockwlth the locking lugs on a similar shoe, each of said recesses being of less depth than its corresponding locking lug whereby to space the back and face of the interlocked shoes apart intermediate their ends. 16.' An interlocking brake shoe comprising a body member provided with a centrally disposed attaching stud and a plurality of locking lugs spaced from the ends of the shoe and having on its face interengaging and bearing surfaces of said inter-` s oes. y17. An interlocking brake shoe ing a body member provided with a centrally disposed attaching stud and locking lugs disposed intermediate said stud and the ends of theshoe, the face' of said shoe being recessed to accommodate. the attaching stud and locking lugs of a similarly shaped and face of said interlocked shoes engaging with each other adjacent their ends, said attaching stud and locking ugs serving to space mediate their'ends.

locked h comprissaid shoes apart inter- I lugs' adapted to space the shoe body away vCopies of this patent may be obtained for ve cents each, by addressing the Washington. ID. C.

from the brake head, .and provided on its l face-With locking recesses adapted to lockingly engage With said spacing lugs, said lugs and the attaching stud serving to space -the intel-locked shoe bodies apart.

19. A brake shoecornprising a body member having" locking lugs on its back and locking recesses on its face to interlock With the locking lugs of a similar shoe, said locking lugs .serving to space the interlocked `shoes apart.

shoes apart throughout a portion of their length. y

20. 4A brake shoe comprising a body member having locking lugs on' its back-and locking recesses on'v its face to interlock with the looking Iugs of a similar shoe, the curvature of the face of the shoe being greater than the curvature oi. the back thereof, and the locking lugs serving to space the iuterlocked CHARLES W. ARMBRUST. Witnesses:

IRA J. WILSON,

G. E. HOLMES,

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