US1100092A

US1100092A - Brake-shoe.

Info

Publication number: US1100092A
Application number: US78031213A
Authority: US
Inventors: Clifton D Pettis
Original assignee: Individual
Current assignee: Individual
Priority date: 1913-07-21
Filing date: 1913-07-21
Publication date: 1914-06-16
Anticipated expiration: 1931-06-16

Description

O. D. PETTIS'.

BRAKE SHOE. APPLICATION IILEDJULY 21, 1913.

1,100,092. Patented June 16, 1914.

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O. D. PETTIS. BRAKE SHOE,

COLUMBIA PLANOGRAPH c0, WASHINGTON, n. c.

APPLICATION FILED JULY 21, 1913.

CLIFTON I). PETTIS, 0F RIDGEWOOD, NEW J ERSEY.

BRAKE-SHOE.

Specification of Letters Patent.

Application filed July 21, 1913.

Patented June 16, 1914. Serial No. 780,312.

To all whom it may concern:

Be it known that I, CLIFTON D. PETTIS, a citizen of the United States, and a resident of Ridgewood, county of Bergen, State of New Jersey, have invented certain new and useful Improvements in Brake Shoes, of which I do declare the following to be a full, clear, and exact description.

My present invention relates more particularly to that class of brake shoes for railway cars in which the strengthening or reinforcement of the back portion of the shoes is effected by means of ductile metal plates, so that as the shoes are reduced by wear, the danger of their cracking and falling from the brake head is avoided. An example of this type of brake shoes is illustrated in various Letters Patent Nos. 1,065,715,1,065,718 and 1,065,719 granted to me under date of June 24, 1913.

The invention consists in the features of novelty hereinafter described, illustrated in the accompanying drawings and particularly pointed out in the claims at the end of this specification.

Figure 1 is a view in side elevation of a brake shoe embodying my invention. Fig. 2 is a plan view. Fig. 3 is a view in longitudinal section on line 33 of Fig. 2, the body or wearing portion of the shoe being omitted. Fig. 4 is a view in longitudinal section on line 44 of Fig. 2. Fig. 5 is an inverted plan view of the pan shaped shell inclosing the back of the shoe. Fig. 6 is a detail view of the blank from which the supplemental reinforcing back plate and parts integral therewith will be formed. Fig. 7 is a view in side elevation of the supplemental back plate with parts turned up in readiness to be passed through the shell. Fig. 8 is a detail view of the blank from which the center lug will be formed. Fig. 9 is a view showing the center lug blank partially folded. Fig. 10 is a view in vertical cross-section on line 10-10 of Fig. 1.

The body 12 of my improved brake shoe is preferably formed of cast metal, although other suitable wearing material may be employed. The upper portion of thebody 12 is inclosed within a pan shaped back 13 that is preferably connected to the cast metal body 12 (if cast metal be employed) in the casting operation, in manner well understood by those familiar withthe manufacture of this'class of brake shoes. The pan shaped back 13 is formed with side and end walls and within the top of this back are punched a plurality of slots 13 and 13 adjacent the ends of the back and a plurality of slots 13 adjacent the center. Within the pan shaped back 13 is placed a reinforcing member consisting preferably of a supplemental back plate 14 that is formed of ductile metal, this member or plate 14 being preferably formed with openings 15 between its center and ends. The blank from which the back plate 14 will be made, as shown in Fig. 6, will be provided with slits 14 adjacent its ends and the

slits

14 and 14 adjacent its center, so that end prongs or

flanges

14 and 14 and center prongs or flanges 14 may be formed, as shown in Fig. 7 of the drawings. The purpose of the prongs or flanges 14 14 and 14 will more fully appear hereinafter, but before the back plate 14 is set within the pan shaped back or shell 13, these prongs will be turned at approximately right angles to the body of the back plate 14, as shown in Fig. 7, so that the end prongs 14 and 14 will pass through the end slots 13'" and 13 of the shell 13, while the central prongs 14 will pass through the central slots 13 of the shell.

After the reinforcing back 14 has been placed within the shell 13 with the prongs or flanges extending through the slots of the shell, as above indicated, the end prongs will be bent to form the end lugs of the shoe and the central prongs will be bent to engage the center lug of the shoe in manner to be presently stated. That is to say, the central prong 14 at each end of the reinforcing back will be bent downwardly and inwardly, as shown in Figs. 1 to 4 of the drawings, thereby forming a raised lug that will enter the usual slot at the end of the brake head, and the prongs 14 will be bent upwardly and then downwardly, as clearly shown in Figs. 1, 2 and 3 of the drawings, to form bearing lugs for the ends of the brake head.

When the end lugs are formed by bending the prongs or

flanges

14 and 14 in the manner above described, they also serve to effectively lock the back plate 14 to the shell 13 and, inasmuch as these end lugs are inl tegral with the back plate, all strains thrown upon the end lugs will be transferred directly to the back plate.

After the central prongs or flanges 14 have been bent upward, as shown in Fig.7,

and the back plate 14 has been attached to the shell 13 in manner above described, the center lug 20 will be interlocked with the prongs or flanges 14?. This center lug 20 is formed from a blank preferably the shape shown in Fig. 8; that is to say, this blank is cut with the lateral tongues or flanges 21 and the end tongues or flanges 22 at its ends. The blank is first bent upon the lines 23, shown in Fig. 8, until the portions 24: that are to form the end walls of the lug are at approximately right angles to the portion of the blank that is to form the crown of the lug, and the laterally projecting tongues 22 will be bent at substantially right angles to the portions 24; after whichthe tongues 21 will be bent against the edges of the tongues 22, as clearly shown at the left hand portion of Fig. 9 of the drawing. WVhen both ends of the blank have been bent, as-shown at the left hand side of Fig. 9, the center lug will be placed with its box-like ends between the upstanding prongs orflanges 14 of the back plate 14, afterwhich the free ends of the prongs 14: will be bent downwardly around'the tongues or flanges 21 at the ends of'the lugs, so as to securely interlock the lug to the back plate 14: and shell 18, as clearly shown in Figs. 1, 2 and 3 ofthe drawings. The center lug will thus be securely interlocked with the back plate, so that all danger of the center lug pulling, away from the body of. the. brake shoe or. becoming loosened or displaced will be avoided. When the parts have been assembled, as above described, they will be placed. within the mold and the cast metal body, of the. shoe will be unitedwith such parts in the casting operation in manner familiar to those conversant with the manufacture of brake shoes.

' While in the preferred form. of my invention a pan shaped back 13 is used, it is obvious that features of the invention may be employed even, if. the back or shell. 13

be. omitted.

One advantagev of my. present invention,

whether theshell be used or not, isthat all.

thrust and strain on the center and endlug isv transmitted directly to theback, which serves to reinforce theshoe-fromend to end, the back, plate and; the lugs forming an integral bearing for the brake head. Moreover, inasmuch as the parts forming the center and end lugs. project outwardly from the back plate 14;, a maximum of wearing surface of the body of theshoe is afforded, as. nopart projects below the surface of theback plate. So far as I am aware, also, my invention presents the first instance of a brake shoe in which a supplemental back plateplaced within an outer-shell has parts integral therewith and projected outwardly therefromithrough the back, or. shell, so that all dangerof separation of. the back. plate from the shell is avoided and the number of parts is reduced to a minimum.

Manifestly, the precise details of construction above set out may be varied without departing from the scope of the invention.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is 1. A brake shoe comprising a body having a ductile metal reinforcing member provided at its ends with a plurality of tongues or prongs bent outwardly to form end lugs, the tongues or prongs forming the side portions of said end lugs being reversely bent to give double thickness of metal thereto.

2. A brake shoe comprising a body having a ductile metal reinforcing member provided at its ends with three tongues or prongs extending lengthwise of said member, the center prong being longer than the prongs on each side thereof, said prongs being bent to form the end lugs of the shoe.

8. A brake shoe comprising a body having a ductile metal reinforcing member provided adjacent its center and at each side with upwardly-bent integral prongs, and a center lug provided with projecting tongues or flanges arranged above the reinforcing member and interlocked with said prongs.

4. A brake shoe comprising a body having a ductile metal reinforcing member provided at its ends with a plurality of tongues or prongs bent outwardly to form end lugs and having adjacent its center other tongues or prongs bent outwardly, and a center lug interlocked with said last mentioned tongues or prongs.

5. A brake shoe comprising a body having a ductile metal reinforcing member providec adjacent its center with upwardly-bent tongues or prongs and a center lug having laterally projecting portions with which projecting portions said tongues or prongs are interlocked.

6. A brake shoe comprising av body having .a ductile metal reinforcing member provided adjacent its center with outwardly projecting prongs integral therewith and a center lug provided at its sides with outwardly projecting walls, said tonguesor prongs be in bent over said walls.

A brake shoe comprising a body having a ductile metal reinforcing member provided end there0f, said supplemental reinforcingv member having outwardly projecting parts extending through said slots of the shell or back and forming means for attachment to the brake head.

9. A brake shoe comprising a body having a ductile metal shell or back and a supplemental reinforcing member within said shell or back and extending approximately from end to end thereof, said supplemental reinforcing member being provided with integral parts projecting outwardly through said shell or back and overlapping the upper surface thereof to interlock therewith.

10. A brake shoe comprising a body having a ductile metal shell or back, a supplemental reinforcing member located within said shell or back and a center lug formed separate from said parts, said supplemental reinforcing member being provided with integral parts projecting outwardly through said shell or back and interlocking with said center lug.

11. A brake shoe comprising a body having a perforated, ductile metal back and a supplemental reinforcing member within said ductile metal back, said supplemental member having integral prongs projecting through said back, said prongs being bent outside of said back to form the end lugs of the shoe.

12. A brake shoe comprising a body having a perforated, ductile metal back and a supplemental reinforcing member within said ductile metal back, said supplemental member having integral prongs projecting through said back, said prongs extending outside of said back and forming the end lugs of the shoe.

13. .A brake shoe comprising a body provided with a perforated, ductile metal back, a supplemental reinforcing member Within said perforated back, said supplemental member having integral prongs at its ends passing through said perforated back and having integral prongs ad acent its center, and a center lug engaged by said last mentioned prongs.

14. A brake shoe comprising a body having a perforated, ductile metal back provided adjacent its ends with slots extending transversely of said back, and a supplemental member within said perforated back and having integral prongs extending through the slots of said back, said prongs being bent outside of said back to form the end lugs of the shoe.

15. A brake shoe comprising a body hav ing a perforated, ductile metal back provided adjacent its ends and adjacent its center with slots extending transversely of said back and a supplemental member within said perforated back and having integral prongs extending through the slots of said back adjacent the ends and center, the end prongs being bent outside of said back to form the end lugs of the shoe and a center lug having laterally projecting portions with which the prongs adjacent the center are engaged.

CLIFTON D. PETTIS.

Witnesses:

GEO. P. FISHER, J. G. ANDERSON.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, I). G.