US846755A - Brake-shoe. - Google Patents

Description

i PATENTED'MAR. l2, 1907.

LJ.` NEWBAKER.4 r

' BRAKBYSHOE. `v

APPLICATION 'FILED DEU. 5, 1905.

z SHEETS-SHEET' 2.

,rar trios. "Y

U in 'sA-TESL* JoHN J. NEWBAKER, or sTEELroN, rENNsYLvANra.

- BRAKE-SHOE.

No. 846,755. r Specification of Letters Patent. Patented March 12, 1907.

Application filed December 5, 1905*." Serial No. 290,473.

, lThe bar is then permitted to cool, and while Beit known thatl, Jorr'N J. NEWBAKEa" cold the web is punched to form alternate a citizen of the United States, residing at .parallehsided and tapering or beveled -re- Steelton, in the county of -Dauphin and State cesses 5 and 6. The recesses ,extend inward 6o To all wtowz, llt-may concern:

` of Pennsylvania, have 'invented a new and from the rear edge of the weband terminate -cross-section and corrugating the rear faces web of the bar removes a considerable porl,

useful Brake-ShoeLof which the following is short of the side flanges to provide narrow a specification. intermediate portions 7, which connect the. he invention relates to a brake-shoe. Itongues 8,' formed by punching the recesses The object of the present inventionis to 5 and 6in the web. This results in strcngth- 6 5 improve the construction of brake-shoes and ening the brake-shoe throughout itslength, to enable a simple and eficientbrake-shoe of. and the shoe possesses all the strength incigreat strength and durability to-be manudent to the 'lf-shaped structure of the bar. actured more rapidly and at less expense While the bar is still cold it is sheared centhan heretofore. trally through the tapered or beveled recesses 7o The method of making the brake-shoe con- 6 on the lines 9 9 of Fig. 3 to cut the bar into sists, essentially, in rolling an ingot of iron or the proper lengthsv for forming the brakesteel into a barv substantially T-shaped in shoes. The punching of the recesses in the of the side anges of the bar at the4 last pass tion of the metal thereof and enables the bar 7 5 l. between the rolls, allowing the metal to cool lto be sheared while it is cold, 4which is deand then punching the web of the bar to sirable; as the bar can be cut more accurately form alternate paralleli-sidedand tapered or while cold than when in a heated condition. beveled recesses, then shearing the bar while After the -bar has been cut into proper cold at the beveledrecesses, then reheating lengths the brake-shoe lengths are reheatedl 8c and curving' the severed pieces to the radius Aand placed between suitable dies for curving of a wheel, and iinally punching bolt-holesin them to the radius of a wheel. This curving the web while the metal is cold. or bending of the brake-shoe changes the Inl the drawings, Figure 1 is a rear elevaform of the parallelsided recess 5, whichis tion of a corrugated bar, showing the same transformed into an inwardly-tapered recess, '8 5 after it has passed through the corrugating-l as clearly illustrated in Fig. 5 of the drawrolls. Fig. 2 is an end elevation of the same. ings. The inwardly-tapered recess of the Fig. 3 is a side view of the bar after'the web curved shoe presents an appearance similar has been punched to formlthe parallel-sided to the inwardly-tapered recesses, and the and tapered or beveled recesses. Fig. 4 is a 4tongues 8 formed, by cutting the web, are 9o detail view of one of the pieces cut from the tapered, as shown. bar to form a brake-shoe. Fig. 5 is a similar After the'curving or bending operation has view, the brake-shoe being curved. Fig. 6 been completed the shoe is again allowed to is a side view of the brake-shoe after the iinal cool, and substantially elliptical boltopen step in the lpunching of the bolt-holes in the ings 10 4are punched in the tongues or projec- 95 web of the bars has been finished.' Fig. 7 ing portions of the web while the metal is is a side elevation of the brake-shoe, showing cold. The elliptical bolt-openings 10 of the the same-applied to a brake block or head. projecting tongues are adapted to register Fig. S is a sectional view on the line 8 8 of withbolt-openings 11 of a brake blockerr Fig. 7. head 12, designed to be constructed of cast roo ,llike numerals of reference designate corremetal and consisting of a corrugated body sponding parts in all the figures of the drawl portionv 13 and opposite .web portions 14, ings. ,/1 1 having sockets 1.5 conforming to the coniiguln carrying out the method an ingot of ration of and adapted to receive the tongues iron or steel is rolledinto a T-shaped bar 1, 8. The tongues, which are tapered, form 105 consisting of opposite sideY flanges 2 and a wedges for engaging the brake block or head, webr 3j/which is thinner than the side flanges, which has a heavy intermediate portion inas clearly illustrated in Fig. 2 of the drawings. terposed between the tongues. The said The side lianges 2, whichuconstitute the body tongues iit against and en age both the side of the brake-shoe and which may be of any and end walls of the soci desired thickness, have their rear f aees .4 cor block or head.' The boltopenings of the rugated by the last pass between the rolls. brake block or head are circular, and the iets of the brake 1ro .elliptical 'openings 10 are adapted to register more readily with the circular openings of the brake block or head and will compensate forany slight variation in the position of the said openings.- The longitudinal web--portions 14 of the brake block or head are reinforced by side lian es or webs 16, which are tapered,v as4 clearly illustrated in Fig. 8 ofthe drawings. Y

ro The brake-shoe is securedtothe brake block or head by bolts'17, which pass through the openings l0 and 11. These boltshave squared heads 18, which fit against the rear face of the body portion of the brake block or 15 head, whereby the belts are held from turning toprevent splitl keys 1.9 from being inverted. The split keys are yof the ordinary construction and are passed through perforations of the bolts.' The heads 'of the keys ziopare at the top, and as the bolts are held.

'y against rotation there is noliability of a key dropping out, land there is no tendency of the lower spread terminals of the sides of the keys to compress and release the keys. 5 Washers 2() arearranged'u on the bolts between the keys and the we i portions of the4 brake blockv or head and also between the latterv and. the heads of the bolts. Any other suitable means, however, may be em-v i" 3o ployed for securingthe bolts in the openings of the brake blocker head and the brakeshoe'.' The tongues, which interlock with .the brake block or head, support the' same andrelieve the bolts of vertical strain, `and y 3 5 the corrugated faces 4 of the brake-shoe fit into and interlock with corresponding corrugated faces 21. These interlocking .corrugated faces also assistinl supporting Vthe brake-shoe, and they relieve thebolts .of

4o strain when the brakes are a plied. e It will be seen that the b adapted to be cheaply' and rapidly-manu-.

rake-shoes are i factured and that as the T-shaped bar is sheared after the recesses have been punched in theweb there is less material to cutfand y y the shearing of the bar may be eHected While lthel said bal'.l is cold, thereby insuring great p accuracy both in the ,cutting operation and in theffinished product. vB omitting the cor- 5o "ions iof thev bar'.- rake-shoes having *rear faces may be made ngthus fully described my invention, s aim as new, and desire to secure by lLetters Patent, is-- 'l '1; l'Abrakeshoe consisting of a body por- --tion, and projecting tongues spaced apart to form an ,intervening recess and oppositely f tapered at their endsgsaid brake-shoe being also rovided at the back with anarrow longitu inailv web portion which connects the tonguesl "f 2. A brake-shoe,consisting of a body por'- tion having corrugated -rear faces and povidedwlth projecting tongues spaced apart to Provide an 1'nterveningV recess.

3. The'combination'with a brake block or .head having upper and lower sockets provided withside and end walls a brake-shoe provided with 4upper and lower projecting tongues spaced from each other and also from the side and ends of the brake-shoe and fitting in the sockets of thebrake block or head, said tongues engaging the side-and end walls of the sockets and fastening 'devices piercing the brake-block and the tongues.

4.- The combination. of a brak block or head provided with upper and lower tapered sockets, a brake-shoe having` upper and lower tapered tongues fitting in the sockets and forming wedges for engaging the brake block or head, and fastening devices for securing the tongues in the sockets.

5. The combination of a brake block or -head having socketsv and provided withl a corrueatedface, anda brake-shoe consisting of a )body portion having corrugated rearfaces to interlock with the corrugated face of the brake block or head, and tongues extending froml the body portionV and secured in the sockets of the brake block or head.

' 6. The combination. of a brake block or `head consisting of side portions or flanges and web portions having sockets, a brakevshoe having tongues fitting in-fthesockets,

bolts` piercing the tonguersand the web por- `tions ofthe brake-block and having heads e engaging the adjacent side portion or flange whereby they are held against rotation, and means 'forholding the bolts in position.

The combination of a brake block or head provided with a Vcorrugated face, a brake-snee having acorru ated'face 'fitted against and interloeked wit i the rorrugated 'faceof the brake block or head, and means for securing the brake-shoe and the brake block or head in their interlocked relation.

. In testimony that l claim the foregoing as my own I have `hereto affixed my signature 1n the presence of two witnesses.

JOHN d. NEWI'AKE l/Vitnesses:

ELMER E. Nunen, l). W. Narrow.

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