Machine for forming brake-shoes.

No. 832,633. ' PATENTED OCT. 9, 1906.

E. J. SNOW. MACHINE FOR FORMING BRAKE SHOES. APPLICATION PILED FEB. 17, 1905.

SHEETS-SHEET 1.

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ATTORNEYS

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No. 832,633.

PATENTED OCT. 9, 1906.

.· E. J. SNOW.

MACHINE FOR FORMING BRAKE SHOES.

APPLICATION FILED FEB. 17, 1905.

SHEETS-SHEET 2.

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THE NORRia

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No. 832,633.

PATENTED OCT. 9,. 1906.

E. J. SNOW.

MACHINE FOR FORMING BRAKE SHOES.

APPLICATION FILED FEB. 17, 1905.

SHEETS-SHEET 3.

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THE NORRIS PETERS CO., WASHINGTON. D. C.

UNITED STATES^jPATENT OFFICE, ;

πι urn r SNOVV OF MAHWAH, NEW JERSEY, ASSIGNOR TO AMERICAN brIke shoe f TOOTDRY company, oe jersey city, new jersey, A CORPORATION OF NEW JERSEY.' , . j “ j it · ···-·· ’ , i i .,_t MACHINE FOR FORMING BRAKE-SHOES.

Specification of Letters Patent.

Application filei February 17|Ϊ9Ο5. SeriaTEo. 246,005. .

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Patented. Oct. 9, 1906.

No. 832,633.

to hold the latter in its several different rela- 55 tive positions. . ,

From the underside Of the top plate 11 defends the well or receptacle 19, out of which leads the passage-way 20 and with which connects an opening 21, formed W said top 60 plate. Into said- latter opening 21 is htted. the die-block 22' having a central passage or opening 23 extending through the same, the upper nutting edge of which, in conjunction with the lower cutting edge of the punch 15, 65 is adapte(f¥fl.fornl the hole or opening ih the steel back, as'hereinafter described, the disk • punched from the back falling op· dropping through the opening in the die-hlOck into the well or receptacle 19 and down the inclined 7 c .bottom.]3date-24,. Fig. 5, and out of the machine. . ·,· x j ·

To the front plate 9 of the base or stand is· 'bolted or otherwise secured the bracket 25, provided with the slot 26, in which is adjust- 75 ably’secured the support 27, the latter being adapted toj.be raised or lowered by being turned or rotated in the clamping-nuts 28.

In practice one end of the shoe 29, Fig. 3, , consisting of the cast body 30, having cast in 80 or on the-upper face or surface thereof the steel or malleable metal back 31, is placed upon the support 27, the latter bemg first I vertically adjusted tp the proper height and also- longitudinally adjusted in the bracket 85 25 toward, or away from the stand 7 m accordance with the' length of the shoe under formatibn, the opposite end being placed or supported on the die-block 22 and in such position that the cored opening 32 will fall 90 directly below and in line with the punch 15. The punch is then lowered until its cutting end rests on the back 31 of the shoe, as illustrated in Fig. 3. By means of a hammer, ’ mallet, or other proper tool 33, Fig. 1, a blow 95 is given to the punch, whereby a circular hole ’ or opening is cut in said, back 31 _f the disk or metal (not shown) cut from the back falling out of the machine, as hereinbefore described.

In order to “strip” the>machine—that is, too return the par/s to their normal positions, so that the finished shoe may be removed and another inserted in its place—I secure to the four brackets or flanges 34, formed oil or secured to the inner sides or surfaces of the box 105 or stand 7, the cylinder or barrel 35, containing the piston 36, the latter bemg provided with the piston-rod 37, extending upwardly ·Γ· .

To all whom it may coheerjv:' . . '

Be it known that I, Elmer j. Snow, a citizen of the United States, and a resident ot Mahwah, in the county of Bergen and State , of New Jersey, have made and invented certain new and useful Improvements in M®; · chines for Forming Brake-Shoes, of which, the following is a specification.

My invention relates to an improvement in 10 machines for forming brake-shoes, and more, -particularly to a machine for punching tne. hole in the steel or malleable metal back 01 a· “steel-back shoe” after the back has been, molded in the body of the shoe.

The object of the invention is to.proyide a device of this character which shall be simple in construction and which will easily, readily, and effectively perform its functions. j , With these* and other eridsin view the in-, 20 ventiqn consists in certain novel features of; construction and combinations of parts, as. will be hereinafter fully described, and pointed out in the claims.

In the accompanying drawings, figure 1^1S· 25 a view in perspective of my improved device.

Fig 2 is a horizontal sectional view thereof,: taken on the line 2 2 of Fig. 3. Tig- 3 is.a. view, partly in side elevation and partly m section, the several parts being shown m 20 their adjustments prior to the punching of: the hole in the steel back. Fig- 4 a.sec-, tional view showing the pin for hoRfing the ' punch in its raised position. Fig. 5 is a sec&lt; tional view showing the Several parts in their positions after the formation of the openmg: in the steel back. Fig. 6 is a detached view, of the pneumatic barrel forming part of the, spring mechanism. :

Referring to the drawings, 7 represents the, 40 base or stand, of an inverted-box-like form,, consisting of the side plates 8, front plate 9,: ' rear or back plate 10, and tops’ll, preferably cast in one piece and with the flange.12,., lo the top 11 is bolted or otherwise secured· the 45 bracket 13, having located thereon the guideblock 14, provided with a central opening through the same for the passage of the punch 15, the latter at one end being provided with the head or knob l&amp; .atid. at its co lower end with a cutting edge. In this guide-block is secured the pin 17, Surroundefd. bv the coil-spring 18, the tendency of which latter is to keep the inner end of the ptem frictional contact with the punch 15 m order

833,633 through an opening formed in the top 38 of the barrel or cylinder 35 and encircled by the coiled spring 39, one end of the latter impinging against the top 38 and the opposite end 5 against the piston 36, the tendency of said spring being to keep the piston in its lowered position, as illustrated in Fig. 5.

Into the lower end of the barrel or cylinder 35 leads an air-inlet pipe 40, connected, to io any suitable source of air-pressure, said pipe being provided with a three-way cock 41, operated or controlled by the lever 42, the latter being held in its normal adjustment by the spring 43. After the hole has been 15 punched in the steel back and the parts assume the several positions as illustrated in Fig. 5 a pull on the lever 42 will allow the air under pressure to pass through the pipe 40 and into the cylinder 35 below the piston 36, 20 forcing the latter, with its piston-rod 37, upwardly until said piston-rod striking the lower end of the punch 15 will carry the latter upwardly to its normal position, as indicated in Fig. 1. Upon releasing the lever 42 25 it will be returned to its normal position by the spring 43, thereby so turning the cock 41 as to allow the air under pressure in the cylinder to escape. Thereupon the spring 39, which has been compressed by the upward 30 stroke of the piston, will return the latter to its lowered position. (Illustrated in Fig..5.)

As the tendency of the piston-rod in lifting or forcing the punch out of the opening in the steel back is to lift the shoe off of the die35 block 22,1 provide a clamping mechanism to hold said shoe in place during this part of the operation, this clamping mechanism consisting of horizontal bar or rod 44 the ends of which are secured to the vertical posts 45, 40 around which are coiled the springs 46, the upper ends bearing against said rod 44 and the lower ends against the top plate 11 of the stand. These rods 45 pass down through openings formed in the upper plate 11 of the 45 stand and have their lower ends linked to the arms 47, keyed to the shaft 48, mounted in the sides 8 of the stand. To one end of this shaft 48 is secured the lever 49, the free end being provided with a step 50, whereby to 50 operate the same by foot power. In the operation of the machine and j ust prior to turning on the air-pressure for “stripping” the operator depresses the lever 49, thereby lowering the rod or bar 44 onto the shoe, as illustrated 55 in Fig. 5, thereby securely holding or clamping the shoe onto the die-block. The several parts are held in these positions until after the punch has been raised to its normal position, as hereinbefore described, whereupon to the lever 49 being released the springs 46 will raise the bar 44 to its normal position, and thereby so release the shoe that it may be removed from the machine and another one inserted in its place.

To recapitulate, the shoe is placed m posi- tion in the machine, the punch struck by the mallet 33, the lever 49 lowered to clamp the shoe in place, and the. air-pressure turned on. Finally, the lever 49 is released and the shoe removed. 7°

From the foregoing description it will be seen that the machine is simple and cheap to construct and can be easily, readily, and effectively operated even by an unskilled workman. . . 75