US828957A

US828957A - Brake-shoe.

Info

Publication number: US828957A
Application number: US27707005A
Authority: US
Inventors: Albert Nelson
Original assignee: Individual
Current assignee: Individual
Priority date: 1905-09-05
Filing date: 1905-09-05
Publication date: 1906-08-21
Anticipated expiration: 1923-08-21

Description

N0. 828,957. PATENTED AUG. 2'1, 1906.

.A. NELSON.

BRAKE SHOE. APPLIUATION FILED SEPT. 5.1905.

UNITED STATES PATENT4 OFFICE.

BRAKE-SHOE.

Specification'of Letters Patent.

Patented Aug. 21, 1906.

'Apptcaauied september, 1905. serai No. 277.070.

.T0 all 7011.077), 'it 'mn/y co//Jscr/L:

Be it known that I, ALBERT NELsoN, a citizen of the United States of America, and a resident of Chicago Heights, county of Cook, and State of Illinois, have linvented certain new and useful Improvements .in Brake- Shoes, oi which the following is a spor-.ilicittion.

This inventionlrelates to brake-shoes lor railway-cars, andhas particular reference to that class of' shoes which is formed ol' cast metal and is provided with an insert in its rubbing-face of harder 1n aterial than the body of the shoe and adapted to cut the tread of the wheel, so as to compensate for the wear on the same by the track, and thereby main- .tain a true surface for engagement with the brake-shoe.

Cast-iron is considered the best material' for brake-shoes; but in order to prevent the portion of the tread of the wheel which engages the track from becomingworn more rapidly than the other parts of the tread it is the practice to provide the rubbing-face of a brake-shoe with an insert of hard iron, which tends to cut down the parts of the tread which are not worn by the track.

The main objects of this invention are to provide a brakeshoe in which the hard-iron insert 'is so formed as to be securely retained within the cast-iron body and at the same time interlock with the cast-,iron body part, so as to prevent portions of the cast-iron body from breaking away through becoming cracked, and to provide a form of hard-iron insert which willadmit of substantially equal distribution of the hard and soft metal across the face of the brake-shoe and at the same time prevent splitting ofthe shoe. v

A further ob] ect is to rovide an improved form of back-brace for rake-shoes whereby the end stops will be reinforced against breaking awa and the body of the shoe will be provide with longitudinal ties which will prevent the body part from breaking in two.

I accomplish these objects by the device shown in the accompanying drawings, in which- Figure 1 is arear view in perspective of a brake-shoev constructed according to'my invention. Fig. 2 is a plan ofthe rubbing-face ofthe same. on theline33o Fig. 2.

In the form shown in .the drawings, the brake-shoe has a gripping-face 4, substantially rectangular in outline and curved to- Ireleasing the staple 7.

Fil 3 is a' transverse section i'lt the tread olf' a car-wheel. shoe is provided with end stops 5 ,anda central lug 6, provided with a projecting staple or eye 7'. These lugs are of standard form. The staple 7 is formed of' wire and is embedded into tho lug 6, its ends-8 extending transverse] y ou tw ard within the body of the shoe. vThe shoe is provided with three longitudinal stiflening-

bars

9 and 10. 'lhese are embedded into the cast-iron of the body and extend throughout its length near the back of the same. '.lhe'outer braces Sl extend over the outwardly-extending ends 8 of the staple 7 and ,reinforce th-e lug 6 against breaking and The ends 12 of the bars 9 are bent upwardly within the end stops, so as to reinforce said end stops and prevent the saine from being broken away 'from the body part. The end portions -12 are preferably dovetailed into the end stops to insure a 'good bond therewith.

The rubbing-face 4 of the shoe is provided with an insert 13, of hard iron, which is adapted to 'out down the tread of the wheel and compensate for/wear by the tracks, and thus maintain a uniform surface forv gripping the brake-shoe.;l The gripping-face of the shoe which is shown in the drawings is rectangular in outline, and the insert 13 is distributed in a peculiar manner upon said face. The sides and ends of the insert are indented, and in each case the indentations are of less width at the points near the outer edges of the face than at other points inward of such edges. This has the' effect of dovetailing the hard and soft materials together and prevents the .portions of the cast-iron body which lie be tween the insert and the ed es of the shoe from breaking away. The si es of the insert are beveled and diverge inwardly from the rubbing-face of the shoe, 'so that at each of 'the indentations the material ofthebody of the shoe overlaps that of the insert in such manner as to securely retain the insert in position. sists of. two V-shaped portions having arms 14 extending toward each corner of the shoe, atransverse portion 15 midway between the V-shaped portions, and annular portions 16, connecting the transverse and V-shaped portions.

The advantage of this conformationA The back of the -v 10 In the form shown the insert conof the hard-iron insert is that thetransverse portions 14 and '15 dovetail with the cast metalo the body and prevent the same from breaking away, vwhile the intermediate annular portlons y1 6 compensate for the changes in IIO width of the transverse portions and pro- 'vide asubstantially uniliorm distribution of the hard iron across the face ol the shoe. 'lhis insures uniform wear upon the tread el the ear-wheel and keeps the wheel true. The extremities of the

parts

14 and 15 are preferably-not beveled, thereby avoiding weakening of the shoe by undereutting the portions of the body which lie between said extremi ties and the edges of the shoe. I What I claim asmy invention, and desire to secure by Letters Patent, is-

`1. A brake-shoe comprising a cast-*metal body having a middle lug extending transversely across the back of the shoe, an eye or staple of tougher material disposed transversely of the shoe and having part thereof extending outwardly ofthe lug and part thereof embedded in said lug, and a backbraee extending longitudinally ol" the shoe 'from end to end, and bent upwardly at its middle part to extend over the embedded part of said eye or staple. y

, 2L A brake-shoe comprising a cast-metal body havinga hardanetal insert embedded in the yface of said body, said insert having sedes? diverging arms at each end, transversely-extending; middle partsv 15 inereasing in Width toward the side edges of the body, and the intermediate centrally-open parts 16.

3. A brake-shoe comprising a east-metal I body having end stops and a middle lug extending transversely across the back of the shoe, an eye or staple of tougher material disposed transversely of the shoe and having` its ends embedded in the middle lug and extending` outwardly therein, and apair ,of backbraees formed of material tougher than said body and disposed longitudinally of the shoe,

said braces being embedded within the material of the body, being' bent upwardly at the middle part to extend over the respective ends of said staple, and being turned up at their ends for reinforcing` said end stops, substantially as deseribed.

Signed at Chicago this 30th day of August, 1905. i f

` ALBERT NELSON.

l Witnesses: v

EUGENE A. RUMMLER.. GLEN C.

S'rErnnNs.