US951350A

US951350A - Brake-shoe.

Info

Publication number: US951350A
Application number: US50259109A
Authority: US
Inventors: Henry H Urquhart
Original assignee: Individual
Current assignee: Individual
Priority date: 1909-06-16
Filing date: 1909-06-16
Publication date: 1910-03-08
Anticipated expiration: 1927-03-08

Description

H. H. URQUHAR'I'.

BRAKE SHOE.

APPLICATION FILED JUNE 16, 1909.

w M o L o P m M 6 M m J u a m m H w M B If M M any M P wi lmeawo H. H. URQUHART. BRAKE SHOE.

APPLICATION FILED JUNE 16, 1909.

Patented Mar. 8, 1910.

2 SHEETS-SHEET 2.

witnesses inforcing inserts.

HENRY H. URQUHART, 0F PADUCAH, KENTUCKY.

BRAKE-SHOE.

Specification of Letters Patent.

Application filed June 16, 1909. Serial No. 502,591.

To all whom it may concern:

Be it known that I, HENRY H. UBQUHART, a citizen of the United States, residing at Paducah, in the county of McCracken and State of Kentucky, have invented a new and useful Brake-Shoe, of which the following is a specification.

The invention relates to improvements in brake shoes.

The object of the present invention is to improve the construction of brake shoes, more especially that shown and described in Patent N 0. 877,748, granted to me Jan. 28, 1908, and to provide reinforcing means adapted to increase the life of the brake shoe, and capable in event of the breaking -or cracking of the shoe of retaining the parts thereof in place until the shoe is worn out or the broken parts removed.

With these and other objects in view, the invention consists in the construction and novel combination of parts hereinafter fully described, illustrated drawings, and pointed out in the claims hereto appended; it being understood that various changes in the form, proportion, size and minor details of construction, within the scope of the claims, may be resorted to without departing from the spirit or sacrificing any of the advantages of the invention.

In the drawings :Figure 1 is a side elevation of a brake shoe, constructed in accordance with this invention. Fig. 2 is a central vertical sectional view of the same. Fig. 3 is a front elevation, showing the wheel-engaging face of the brake shoe. Fig. 4: is a rear elevation of the same. Fig. 5 is a transverse sectional view, taken substantially on the line 55 of Fig. l. Fig. 6 is a detail perspective View of the reinforcing steel frame. Fig. 7 is a detail perspective view of one of the U-shaped re- Fig. 8 is a similar view of one of the concave inserts. Fig. 9 is a transverse sectional view, illustrating another form of the invention. Fig. 10 is'a detail perspective view of the reinforcing inserts, illustrated in Fig. 9. Fig. 11 is.a detail perspective view of one of the H- shaped inserts.

Like numerals of reference designate corresponding parts in all the figures of the drawings.

The brake shoe consists of a body porin the accompanying lug 6. The side tion 1 of gray iron or other suitable. material, reinforced at the back by a frame 2 of steel, embedded in the body 1 by molding the latter around the former like the reinforcing frame of the aforesaid patent. The brake shoe, which is provided at the front with a wheel-engaging face 3, has a recess or depression 4 at the back for the reception of a brake head 5. The reinforcing steel frame, which preferably consists of a drop steel forging, is located within the recess-or depression and constitutes the major portion of the rear face of the brake shoe, and it is provided with a centrally arranged steel lug 6. The steel lug 6 is provided with a transverse opening 7, through which passes a transverselbolt 8 for securing the brake shoe to the brake head. The bolt 8 also passes through opposite ears 6, located at the side edges of the reinforcingframe and having alined openings 7, arranged in alinement with the opening 7 of the central ears 6 are integral with the reinforcing frame and are bent outward or rearward, as clearly illustrated in Fig. 6 of the drawings. The central attachin means formed by the lug 6 can be omitte as the integral side ears The brake shoe is curved longitudinally, and the reinforcing frame is curved to conform to the configuration of the shoe, and the said frame is provided at opposite sides of the lug with longitudinal openings 9 which receive portions 10 'of the metal of the body of the brake shoe. The sides and ends of the frame are interlocked with the body of the brake shoe by means of side and end

arms

11 and 12, which extend through the marginal side and

end walls

13 and 14 of the recess or depression 4. The side arms 11 are located between the ears and the ends. The end arms are locatedat.

of the frame. the center and side portions of the ends of the frame, the end arms being spaced apart to provide longitudinal openings 15, which receive ortions 16 of the metal of the body of the rake shoe. The outer portions of the end arms 12 are provided with openings 12, and when the metal is cast around the reinforcing frame, portions'of the gray iron extend through the openings 12, forming integral rivets or connecting portions to prevent the outer portions of the end walls from being knocked off. The edges" 17 of Patented Mar. 8, 1910.

will be ample for securing the brake shoe to the brake head.

clearly illustrated in openings- 21, adapted the reinforcing frame at the longitudinal The wheel-engaging face of the brake shoe is provided at the inner side with a-groove 18, arranged to receive and en age with the flangeofthe wheel, and the also provided at an a groove 19, adapted to relieve a portion of the periphery of .the engaged wheel of wear. The brake shoeis provided at the outer side portion with approximately U-shaped reinforcing inserts20, extending from the reinforcing frame to the braking surface of the shoe and exposed thereat. The reinforcing inserts 20, preferably consisting of drop steel forgings, are also adapted to operate as chills for hardening the body portion of the brake shoe. The sides and connecting ortion of each U'- haped insertare ofuni-j orm width and thickness, and the insert presents a continuous U- haped edge .at the braking surface of the shoe. The U-shaped inserts, which are reversely, arranged, as Fig. 3 of the drawings, are provided at opposite sides with alined to receive an'anc'horing rod 22, which is embedded in the body portion of the brake shoe, whereby the'U- shaped reinforcing inserts are connected together and-are adapted to operate with the reinforcing frame in maintainin the parts of the brake shoe together, shoul the brake shoe become cracked or broken. Instead, however, ofemploying a rod for connecting the series of U-shaped inserts, the metal of the brake shoe body at the opposite sides of the U-shaped inserts, uniting through the openings of the latter, the same in place. The brake shoe is also provided at the groove 18 with reinforcing inserts 23, consistingof drop steel forgings tapered outwardly or forwardly,as clearly shown in Fig. 8. of the drawings, but the inserts 23'may be of the same cross sectional area at their end s,'as'the recesses hereinafter described will serve to securely retain the inserts in the body of the brake shoe. The reinforcing inserts 23 are provided with concave outer faces 24, arranged in flush relation with the face of the brake shoe at the cove 18, so as tobe exposed at the brakmg surface of theishoe. drawings, I have illustrated an approximately H-shaped reinforcing insert 23, composed of two sides and a connecting web or portion 25% The H-shaped reinforcing insert is provided at opposite sides of the rake shoe is intermediate point with creasing the life will securely retain In Fig. 11 of the connecting web or portion 25 with recesses, which receive portions of themetal of the body of the brake shoe. The preferred form of concave reinforcing insertis illustrated in Figs. 3 and 8 of the drawings. These reinforcing inserts 2a are composed of rectangular corner portions 25 and a central rectangular portion 26, recesses 27 being provided at the sides between the connecting corner portions. The recesses 27, which are'located at each ,side of the reinforcing metal seat insteadof at the opposite sides, ceive themetal of the body portion of the brake shoe and besides reinforcing an inof the sh'oe also operate like the U- haped inserts to constitute chills for hardening the body portion of the brake shoe. The recesses and the spaced arrangement; ofthe U-shaped reinforcing inserts and the recessed concave inserts prevent blow-hole or air-hole imperfections of a casting from causing the insert to fall out. The gray iron is coarser ingrain than the reinforcing inserts'and of a less degree of hardness, and the dust worn from the gray iron passing between theinserts and the 'wheel will maintain the engaging face of the brakeshoe in a smooth condition, thereby preventing the gray iron of the body portion from taking-such a hold on the Wheel as to cause the same to-slide and flatten. Y

In the embodiment of the invention illustrated in Fig. '9, transversely disposed reinforcing inserts 28 'are inserts 24. The inserts 28, across the brake shoe, consist of a straight shank portion 29 and a head 30, extending in advance and in rear of the straight shank andhaving a curved face, 31' conforming to the configuration of the groove, which engages with the fiange of the wheel. The

'rearwardly extending portion 32 of the head the inserts 29 and unite with and a front connecting portion 30 is provided with an'opening'33 and the shank 29 has a similar opening 34. These openings permit the metal to flow through eachside of the same. The shanks 29 of the transverse reinforcing inserts 28 will in practice be arranged in the spaces between the U-shaped inserts. I

The brake head is composed of two sides vided with an opening 35 through which the lug 6 passes, and the side walls 'of the brake head. are pierced by the transverse bolt 8, provided at one end with ahead, and threaded at the other endto receive a nut 86, which may be keyed or otherwise locked to .the bolt. The brake head is also provided in its front wall or connecting portion with-a longitudinal groove 37, extend- I ing above and below the central openin andadapted to guide the lug to the said 155 as illustrated in Fig. 11, re-

substituted for the 'which' extend the metal at 34, proshoe being supported by the u per end wall,

- which relieves the transverse otherwise injured. The openin opening andfor affording the necessary clearance for the lug.

The brake shoe is adapted for use at either the right or left hand side of a locomotive, car or the like, and the brake headslides in the depression or recess 4, as clearly illustrated in Fig. 2 of the drawings, the brake olt'of strain and prevents'tliebolt from being bent or 7' and 7.- of the lug and the ears are elliptical, and the end walls are spaced from the boltwheii the parts are assembled.

Having thus fully described my invention, what I claim as new .r'id desire to secure by Letters Patent, is:- i

'1. brake shoe consisting of a. body provided at theback with a depression or recess, and a reinforcing franie embedded in the body at the back thereof and provided with openings having scalloped edges forming pro ecting portions and nterveniu recesses.

A brake shoe consisting of a ody provided at thehack with a depressioriF-or reess, and a' reinforcing frame embedded n the body at tlieback thereof and having longitudinal openings located at each end fof the frame in spaced relation and provided with scalloped edges forming inwardly extending projections and intervening seats or recesses.

3. A brake shoe consisting of a body per-i tion provided at intervals with substantially -tl-shaped reinforcing inserts extending from the hack portion of the shoe to and exposed.

at the braking surface of the same and'co'inposed of spacedsidqg'having alined open ings, and a'eonnecting portion.

4. A brake shoe consisting of a body'pro' rided at intervals with substantially U5 shapedreiuforcing inserts extending from the back of the shoe to and exposed at the braking surface of the same and composed of sides and a connecting ortion, the-sidesand the connecting portion eing of uniform width and thickness and presenting a continuous U-shaped edge at the said braking v 4 I '-ing extendedthrough the end walls of the surface.

A brake SllOQCOIlSiStiII$-Of a body ,or l tion provided at. intervals with substantially v U-shaped reinforcing inserts extending from and composed of spaced sides, and a connecting portion, the 'sides being provided -with openings.

(t. A brake shoe consisting of a body por tion provided zit-intervals with substantially U-shapcd reinforcing inserts extending from the back portion ofthe shoe to and exposed at the braking surface of the same, said reinforcing inserts bcing'reversely arranged and composed of spaced sides and a connectin portion, the sides being-- provided with aline openings, and a binder rod embedded in the face with a groove adapted to receive the flange of a wheel, and reinforcing inserts embedded in the body at 'the said groove and having a concave outer' face exposed at the braking surface, each insert consisting of .a substantially rectangular block provided with a plurality of recesses located at the sides of the insert and extending from the inner to the outer face of the insert and receiving portions of metal of the body of the brake shoe. y 8. A brake shoe consisting of a body prowided at the inner side of its brakin surface .witha groove adapted to receive the flange of. a .wheel, and reinforcing inserts embedded inth'e body at the groove and havin a concavc outcrface exposed at the braking sur- \-:facc. each insert consisting of a rectangular block or piece recessed at each side and forming central and rectangular portions.

which portions'of. the metalof the walls extend;

10; Abra'ke shoe consisting of a body process, and. a, reinforcii'igfifra e embedded in the body at the back thereof and provided edges and 'forliiing end arms, the latter be- :mcessbtdegrssionand provided with-openinggthrOug 'fwh ch portions of nictalex- -Iii ;testi inony',.that I claim the foregoing as niy'o wn,'-'-I have hereto affixed my signatiire in the presence of two witnesses.

. HENRY H. U RQU HART. Witnesses HAL A. CORBETT,

ISLA Enno.

body of the brake shoe and passing through videdat the-back with a depression or re-' ridedatthe inner side of its braking sur- 1 9. A brake shoe consistin of a body pro- A -tliiouglnthe walls of the recess and provided atthc saiid terininals with openings through with longitudinalopenings having scalloped a