US1470475A - Brake shoe - Google Patents

Description

Oct. 9 1923.

C. D. PETTIS BRAKE SHOE Filed Sept. 2. 1922 4 Sheeas-Sheerl 1 C. D. PET-ns BRAKE SHOE Filed sept. 2, 1922 4 sheets-sheet 2 1l/ym P v uw ium QBSWSM.

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C. D. PETTIS BRAKE SHOE Filed Sept. 2. 1922 4 Sheets-Sheet l uw v Patented Oct. 9, 1923.

CLIFTON D. PETTIS, 0F NEW YORK, N. Y.

BRAKE SHOE.

Application led September 2, 1922. Serial No. 585,903.

To all 'whom t `may concern:

Be it known that I, CLIFTON D. Perris, a citizen of the United States, residing in New York, in the county ofNew York and State of New York, have invented certain new and useful Improvements in yBrake Shoes, of which the following is a specification.

My invention relates to brake shoes, but more particularly to the sectional type, in which the cast body is divided transversely into two or more parts joined by a reinforcing back of tough ductile metal, and has for its primary object to `provide an improved construction of this type which may be economically produced and which is more strong and durable than devices of a similar character heretofore known.

The many other objects and advantages of my invention will be better understood by reference to the following specification when considered in connection with the accompanying drawings illustrating selected embodiments thereof, in which Fig. 1 is a side elevation of the brake shoe complete;

Fig. 2 is a section on the line 2-2 of Fig. 1.

ig. 3 is an enlarged transverse section on the llne 3-3 of Fig. 1;

Fig. 4 is an enlarged transverse section on the line 4 4 of Fig. 1;

Fig. 5 is an enlarged transverse section on the line 5-5 of Fig. 1;

Fig. 6 is a detail side elevation of the back plate shown in`Fig. 1;

Fig. 7 is a' top plan view of the plate shown in Fig. 6;

Fig. 8 is an enlarged transverse section on the line 8-8 of Fig. 7;

Fig. 9 is a side elevation of a modified form of back plate;

Fig. 10 is a side elevation of a modified form of brakeshoe.

Fi -11 is an inverted sectional plan on the line 11--11 of Fig. 10;

Fig. 12 is an enlargd transverse section on the line 12-12 of i 10;

Fig. 13 is an enlarge transverse section on the line 13-13 of Fig. 10;

Fig. 14 is a transverse section on the line 14--14 of Fig. 10;

l Fig. 15 is a side elevation of a modified ing members 35 which are bent form of the brake shoe shown in Fig. 1, and

Fig. 16 is a side elevation of a'modified forni of the brake shoe shown in Fig. 10.

Referring to the` drawings and particularly to Figs. 1 to 9 inclusive, the brake shoe comprises Ia back plate 25, a key lug 26, and lugs 27, a plurality of individual reinforcing members 28, and a cast body 29. The reinforcing members or shells 28 are arranged end to end and are secured to the back 25 by a series of bent down lugs 30. These shells 28, in the present embodiment, are constructed in the form of cages or pockets of reticulated or expanded metal and the pockets are connected through the medium of the yback plate 25. The body of the shoe is divided transversely into sections 31 each incorporating one of the reinforcing shells 28.

ugs SOare preferably y struck downwardly from the body of the back 25 and are bent laterally beneath the body of the plate after the shells lhave been placed in proper position relative thereto.' These lugs 30 provide a locking engagement between the back and the cages in the manner indicated.

The key lug 26 is provided with attachdownwardly and inserted through slots 36 provided for the purpose in the back plate 25 and the lower portion of these members .is then bent upwardly beneath the plate and the upper portions of the corresponding reinforcing shells 28 to secure the lug upon the plate and provide an additional attachment between the plate and the shells.

The end lugs 27 are formed by bending upwardly and then downwardly the end ortions ofthe back plate to form upstan in ribs of double thickness of metal. These en lugs extend completely across the back plate. Guide flanges 37 are struck up from the plate 25 and then bent downwardly to provide a double thickness of metalsimilar in form to the end lugs 27. The prongs 30ll on the end lugsmay be bent upwardly beneath the body of the plate in the same manner as the lu s 30.

ach of the shells 28 is composed of sides 40, end Walls 41 and a top 42, the baskets being open at the bottom. These shells may be made of expanded metal, wire fabric, or other material suitable for the purpose. A

slight interval43 is preferably provided between the end walls of adjacent shells when the same are attached to the reinforcing back. This interval is maintained between the body sections cast thereon and permits a certain yielding of the shoe to conform to variations in the diameter of the car wheel, also variations in the radius of the face of the shoe from variations in temperature. Oifsets 25 are preferably formed 1n the back 25.

lIn the assembling of the shoe the back late is formed in the manner illustrated 1n igs. 6 to `9, with the lugs 30 bent downwardly from the reinforcing plate. The shells 28 are then placed in position on the under face of this plate. Certain of the lugs 30 project through openings in the shells and others extend outside the same. lugs 30 are now bent up to bind the shells tightly in place on the under face of the back. The center lug 26 is attached in the manner described and the sections of the shoe are cast upon the combined back and shells in the usual manner. In the modied form of reinforcing back 50, shown in Fig. 9 the key lug 51 1s formed integral with the back instead of separate therefrom and attached thereto.

This form of brake shoe is very ,advantageous as each of the sections of the shoe is thoroughly reinforced by the individual ductile metal shell or pocket embedded therein and the various sections are securely -connected by the back plate. The `lugs 30 firmly secure the shells 28 upon the back plate prior to the casting of the body and this body adds to the strength of the attachment.

In the modified form of the invention shown in Figs. 10 to 14 inclusive, the ductile metal reinforcin back is provided with side walls 56 an end walls 57 of reticulated metal. The side walls 56 are divided transversely as at 58 and a sectional shoe 59 is cast on the back with the divisions between Y sections corresponding to the divisions in the side walls of the back. A substantially T-shaped opening is provided near each end of the reinforcing back to permit the east metal of the body to pass .therethrough and form the end lugs 60. The key lug 61 is attached to the reinforcing back prior to the casting of the body thereon. This form of brake shoe is substantial( in construction, as the reticulated side and end walls of the back plate, are embedded in` the body of the slioe and the entire shoe is sufficiently flexible'to provide for any variations which may occur in the diameter of the car wheel or in the radius of the face of the shoe from varia tions in temperature. f -v v In the modified form of the.. invention shown in Fi 15 the slots 7() between the sections 71 of the shoe taper from the face of, the shoe to the' back insteadof having Thesel the substantiallyparallel walls shown in Fig. 1. This cnstruction is advantageous. Fig. 16 shows a similar modification of the brake shoe illustrated in Fig. 10 in which the walls of the slots 72 between the sections 7 3 are likewise tapered.

I am aware that various other changes in the form and arrangement of the parts may be made without departing from the spirit of my invention, and I reserve the right to make all such as fall within the scope of the following claims.

I claim:

1. A brake shoe comprising a reinforcing shell having the side walls thereof oppositely divided transversely of the shoe, and a sectional body cast on said shell with the divisions between sections coinciding with the 'corresponding divisions in the side walls of the shell.

2. A brake shoe comprising a transversely divided sectional shell, and a transversely divided sectional body cast on said shell with the sectional division of the body coinciding with the corresponding divisions of said shell.

3. A brake shoe comprising a plurality of cast sections each provided with individual reinforcement embedded therein.

4. A brake shoe comprising a plurality of cast sections each .provided with individual reinforcement embedded therein, and a ductile metal back connecting said reinforcements.

5. brake shoe com rising a ductile metal reinforcing back an a plurality of cast metal body sections having individual reinforcing shells embedded therein and attached to said back.

6. Abrake shoe com risin reinforcing back, and) a plurality' of cast body sections having individual reinforcin shellsembedded therein and attached to said back by lugs formed -on said back. v

7. 'A brake shoe comprising a plurality of cast,body sections provided with individual reinforcing pockets of reticulated metala duct-ile metal cast body sections arranged end to end and having individual reinforcing shells of reticulated metal each including a top, sides, and end walls.

9." A brake shoecom rising a transversely divided sectional she 1, a transversely divided sectional body cast on said shell with the sectional division of the body coincidin with the corresponding divisions of sai shell, andv a back plate connecting the shell sections.

10. A brake shoe comprising a reinforcing shell havin the side walls thereof oppositely divide transversely of the shoe, and a sectional body'cast on said shell with the divisions between sections coinciding-V with the corresponding divisions in the side walls of the shell, the slots formed between the opposing end'walls of the sectionsta.- pering toward the back 'of the shoes.

11. A brake shoe comprising a back hav- 5 ing a transversely divided sectional shoe body cast thereon, the slots formed between the opposing ends of the shoe sections ta.- pering from the face of the shoe to the back.

l2. Av brake shoe comprising a ductile metal reinforcing back having e transverse- 1y divided sectional shoe cast thereon, the opposing end walls of the sections being opposiely inclined to form tapering slots between the sections.

CLIFTON D. RETTIS.

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