US907780A - Brake-shoe. - Google Patents

Description

J. J. GLENNON.

907;'780. PPPPPP u IIIIIII Ewig 07 Patented De0.29,1908,

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JOSEPH J. GLENNON, or UNIONTOWN, PENNSYLVANIA, AssicNoE To AMERICAN 'BRAKE snOE a'EoUNDRY COMPANY, or JERSEY crrY, NEW JERSEY, A 'OORPOEATION OE NEW JERSEY.

BRAKE-SHOE. 7

No 907,780.- I

Specification of Letters Patent.

Patented Dec. 29, 1908.

Application filed April 25, 1907. Serial No. 370,226.

y of Uniontown, in the county of Fayette and State of Pennsylvania', have made and invented certain new and usefullmprovements in Brake-Shoes; of which the following is a@ specification.

' My invention relates to an improvement in brake shoes, and more particularly 'to the' kind or style thereof having relatively hard and soft inserts located in the wearing face of the cast iron shoe, the object being to so construct the shoe as to-o'bviate the danger of its breaking or cracking; further, to sotoonstruct the shoe that in the event of its cracking after being Worn downv in service,l the parts will be prevented from separating to such an extent as to allow the inserts to drop out or become disengaged from the body of the shoe. With these and other ends in view, the invention consists in certain novel features of construction and combinations of parts, -as will be hereinafter fully described and pointed out in the claims. L

In the accompanying drawings, Figure 1 is a longitudinal sectional view of a shoe constructed in 'accordance with my invention,

" taken Von the line 1-1 of Fig. 2. 2 is a ings a., throilgh'which the cast meta c' fthe A plan View of the same. Fig. 3 is asectional view taken on the line 3-3 of Fig*i 1. Fig. 4 is a sectional view taken on the ne 4--4 of Figrl. Fig. 5 is a detached view of a part'or portion of the steel back. l

Referring to the drawings, A represents the body of a brake shoe preferably made of cast iron and provided in its wearing face with the inserts B, made of relatively hard and soft metal. At or adjacent to the back of the shoe, is the late C, formed of steel, wrou ht or malleab e iron, or other tough or ducti e metal, such plate `being employed for the purpose yof reventing the shoe from falli l. lng ap art 1f bro en when worn thin from service, and 'also actin as the tension member of the trussed arc This plate is provided with the holes-or o enbody A is 4allowed to flow, in order to assist` in anchoring or securing the plate' in. its

of the. key lug preferably madevof .wrought iron, -theextreme of whih trims Op hereinafter described,

l are bent under the plate to assist in locking the same in place, as illustrated in Fig. 3. Along one side of the vbody'of the shoe, is

formed the flange or arch E, the'same being f cast integral with the body of the shoe, the central portion thereof, that is, that portion Yosite the key `lug D, havingA the greatest eight or width,in order to impart' the greatest strength to the central portion of the shoe, the heighty or width ofthe arch gradually decreasing towards its ends, vthe length ofthe flange being usually somewhat shorter than the bodyof the shoe. Thisarch or flange E,.formed and located as described, when employed in connection with the late C, voperates as a trussed arch, the plate acting as the tension member, and the arch or flange the compression member of a truss, the result being that should any fracture occur in the body A, any'tendencypf the parts to open or separate will be resisted "by the combined action ofthe plate which binds the broken arts together, and the metal of the arch or ange, which operates to-p'reventthe bending of the plate, which plate should the flan e be omitted, would bend and permit the ody'of the shoe to open along the line of fracture sufficiently to allow the insert to dro therefrom. 1n the case of thetrussed arc however, even though the body of the shoe be fractured ort-the line of one ofthe inserts B; the several'parts of the shoe will be soA held together as to obviate all danger of the insertsfalljngror 'dropping out of place.

l have found om numerous experiments that when the arch or flan e is omitted and the body of the 'shoe crac ed or fractured along-the lines of one of the inserts B, the v plate C'is liable to bend, thereby permitting the two sections or parts of the broken'shoe to-so separate at the fracture as to allow the insert at the line of fracture, to become disengaged and dropout ofthe body of theshoe. I have also found that where the arch is employed, and thel 'late or tension member of the truss omitte if the shoe cracks at the line ofthe insert, or'in fact anywhere else; thecrack yinvariably extends through the flange, .thus permitting the two sections to fall apart and destroy the shoe, butthat when both. flange and plate@ are used, the fracture usuallyv stops at the plate, and' that, should it extend beyond the after into the shoe' will not separate far enoug to permit o the falling out v tension member of7 the truss acting to hold wrought or bind the sections together, and by reason of its being locked and anchored to the bodyv formed wholly of cast metal in the usua an ln each instance,

well known manner.

- however, this casi: metal Dl formin a part of that is, over an the key-lu will be formed integra vwith the arch E' an withv the central or highest portion thereof, thereby imparting additional strength thereto.

t will be understood from the foregoing that the trussed arch, the feature which adds or imparts the additional strength to the shoe, is superim osed upon the body thereof, above any and all portions of the shoe which are exposed to wear, materially prolonging the life of the shoe, as the same may be worn down'luntil comparatively tbin. Furthermore, by reason of the additional strength imparted to the shoe, I am enabled to employ much thickery inserts than is usually the case; in fact such may be extended to within a short distance ofthe back C.

Having fully described my invention, what I claim as new and desire to secure by Letters Patent, iszl 1. A brake shoe comprising a cast metal body and'provided with a trussed arch, substantially as described.

2. A brake shoe comprising a cast metal body and provided with a trussed' arch superimpose thereon, substantially as dev scribed.

3. A brake shoe comprising a cast metal body and a trussed arch superimposed thereof an insert, the plate or own in Figs. 1, 2 and, the

and inserts located in said body and eX- wcaring face thereof to of the back, substanon, tending from the within a short distance tially as described.

4. A brake shoepomprising a cast metal body, an arch cast integral therewith, and a plate located at or adjacent to the back of said body and cooperating with said arch t0* form a truss, substantially as described.

5. A brake shoe comprising a cast metal body, an arch cast integral therewith and' alon or a jacent' to the back of tially as described.

6. A brake shoe comprising a cast metal face thereof, an arch or flange cast integra withthe body and .along one side thereof, and a plate located at or adj acentto the back of the shoe, substantially as described.

7. A brake shoe comprising a cast metal body, a flange formedfinte ral along one side thereof, an( extending above the back of the shoe, and a plate anchored to, the shoe at or ad'acent to the back thereof, substantially as escribed.

body having inserts located 1n the wearing' 65 one side thereof, and a plate located at the shoe, substantherewith and 8. A brake shoe comprising a cast metal body rovided with a key-lug, a flange forme inte ral with thev body of the shoe and alongsi e thereof and with said key-lug, and a back plate anchored to the body of the shoe at or adjacent to the back thereof, substantially as described.

'9. A brake shoe comprising a cast metal body, a flange formed inte ral therewith and along one 'side thereof, a rey-'lug cast integral with the body of the shoe and with the central portion of said flange, and a back late anchored to the ocated at or adjacent to the back thereof, substantially as described.

Signed at Uniontown,

in the county of Fayette, and State of Pennsylvania, this 20th day of April A. D. 1907.

body of the shoe and JOSEPH J. GLENNON. i

Witnesses GEo. W. WORTH, JNO. BoYLE.

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