US943995A - Brake-shoe. - Google Patents

Description

A. H. REID.

BRAKE SHOE.

AAAAAAAAAAAAAAAAAA Y 1, 1909. V 943,995.. Patented Dec. 21, 1909.

Fig INVENoR..

BY W

lllr-ldllhlllllll ittlhlllitlllt ANEREW' H. REID, OF TORONTO, ONTARIO, CANADA, ASSIGNOBJ OF ONE-SIXTH T0 NOR- Mll K. REED, ONE-SIXTH TO HUGH REID, SR., AND ONE-SIKTH TO HUGH S. REIG,

ALL or TORONTO, canapa.

BRAKE-SHOE.

ofi-apela.

Specification of Letters Patent.

Patented 2l.,

:replication fired May 1, 19Go. serial No. 493,354.

To all whom it may concern:

lle it known that l, ANDREW H. Rino, of the city of Toronto, Province of Ontario, Canada, have invented certain new and nSe- 'ul Improvements in Brake-Shoes, of which the following' is a Specification.

This invention relates to improvements in brake shoes of the type in which a. cast metal body is reinforced with wrought iron, steel or other tough metal and my object is to devise a Shoe of thia type which, 1, `will have. a longer lite than ordinary Shoes; 2, will when new weigh less-than ordinary shoes without y material reduction of the thielneqf; of metal available for wear; 3, will, when worn ont, weigh less" as sera than oriflinary Shoes; ll, and will, pound tor pound, be cheaper to manufacture than ordinary reintiirced shoes.

I attain the objects of my invention by using,` as a reinforcement a plurality ot tubes ol tough metal extending lengthwise of the Shoe close to the back and opening through the ends thereof. By this arrangement I secure the greatest possible strength in the reinforcement with the minimum weight ot reinforcing material. ,lhe ree inforcing tubesl displace a larger amount of caat metal than Solid reinforcing material and a reduction of weight in the shoe is thus ell'ected, but aa this material is displaced 1 'au' the back of the shoe the amountot maleiial available tor wear is not materially red need. 1When the shoe is worn down. to the reinforcement it is ready tothe scrapped and as the part scrapped containsI the tubeS its weight is much less than that ot' solid material.l As Shoes are bought by weight and the scrap is aellable only at a very small price. the reduction in the weight oit the aol-ap ie'ot `great athfantaoe to the railways. The tubes also Serve aa air pasaag'oa to cool the :Shoe and aa cool shoes wear less rapidly than hot Shoe` the mileage vol" the aimee ist materially increased by my eonatiaiction. l employ a. center lirer on the back of the Shoe andthis lug is reint'ort'iiil'by' wire netting' engaging the reintm'cingr tubeaI aa hereinA after described.

Figure l is a perspective View ol. my im` proved brake Shoe. YFig. Y2 is a longitudinal section ot the Same. lfig. 3 is a cross-section o'lr the Same taken through the key lup'` lo the drawingsl like 'lettera ot reterence indicatecorresponding parte in the different gore?.

A is the body of the brake shoe made ot east iron and provided with the usual key lug l used in attaching the Shoe to the brake head. lt is now common to rein torce such brake shoes with wrought iron, steel or other tough metal, but auch rein'l'orcenzenta have heretofore always consisted of solid metal. In reinforcing my shoe lY use on the contrary a hollow reinforcement ln'elferably comprised ot' a plurality of tubes C ot any suitable tough metal. The tubes will usually be ot wrought liron or steel and will run longitudinally of the brake Shoe as shown in the drawings.

'l`he tubes are arranged side by side. aa

shown, as close to the bach' as possibhnsufliciency ot cast metal beino' lett above them to insure the ,strength ot their contraction with the body ot' the shoe. Theae tubes open through the ends ot the shoe, as shown, so that a clear passage way t'or air is Ylformed through these tubos, lhe ends ot' the shoe are preferably provided with conical countensunli mouths. lhee-e mouthsl iaerve to lgather air and direct it into and through the tubes.

The key lug' l being ol east metal is liable to injury owing; to the brittle nature of the cast metal. l therefore provide Ylor the latter a metalreinliorcmnont l). 'lhia preferably is formed ot' wire netting extending' through the lugl around the key opeuing and embracingl the reinforcing tube (l in the manner shown particularly in Figs. 2 and 3. The tubes thus support. the reinforcement lf) in poaition while the brake shoe ie boing cast. Though l consider the wire netting as the best material l'or thia.

reinforcement l (lo not desire to bind my- Heli' to its use.

lt will he 'found that a shoe constructed in (he manner described `will poesiasA all the advantages Het oul in the preamble lo this apecilieation, and it will be noted that all the :ulfaulagca otl iuctcried lite. strength and lighlnesa are attained by the expedient ot naine; metal lubee: as a reintorcement, the tubes opening' through the ende ot the shoe.

lllliile l Show cylindrical Shoes in the drawingeI it will be understood that any other Shape might be employed, though aS the cylindrical tubea are cheapest and po the advz'xntage ot' the greatest Strength with the. least amount o t material they will uauallyT be employed.

lily System ot' roinll l) l. (l il forcing is also applicable to other forms or designs of brake shoe than that illustrated in the drawings.

Another advantage possessed by my shoe is that when the shoe is Worn down part-ly into the reinforcement channels ure 'thereby opened np for the escupe of the ground, oi particles of the shoe body und reinforcement. This is n, greet advantage as the weer of 'the shoe is much more rapid under the conditions sety out.

niet l claim as my invention isz-- l. A brake shoe comprising a cast metal body and a tubular reinforcement .enst therein.

2. A brake shoe comprising e cest metal body and a 4tubular reinforcement cesttherein7 and having its ends opening through the body of the shoe.

A brake shoe Comprising a east metal body and a metal reinforcing tube cast in 'the body lengthwise of the same and ad- `jacent to the back.

l. A brake shoe comprising a eastmetal body and a plurality/'ot metal reinforcingl tubes enst in 'thebody side by side, length- .grg renner 'wise of the body and adjacent to the nach thereof.

A braL re shoe comprising e oust inetnl body und e metal reinforcing tube cast in 'the body lengthwise of the seine and 'udjacent to the buck, the ends of the tube openingl` through the ends of the shoe.

l. .A brake shoe comprising :i enst metal body and n plurality o'lZ metal reinforcing,Y tubes cest in the body side by side7 lengthwise of the body and adjacent to the buch thereof, the ends of the vtubes opening through the ends of the shoev 7. A brake shoe comprising e cust inetul body with :i key lngv cust :it the beck thereof, u longitudinal reinforcement rast in thebody of the shoe, und u i'eticulnted reinforcement extending around the key-opening in suid lug' :indcn'lbrucing the reinforcement of the shoe body.

Toronto? this 29th day of April 1.909.

ADREKY l REID.

Signed in 'the presence of- J. lu'nw. lniixi'nnia, Enom: M. Sniwmnn.

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