US2124649A - Tool for operating on shoes - Google Patents

Description

July 26, 1938.- c. G. BROSTROM TOOL'FOR OPERAIING 0N SHOES 2 Sheets-Sheet 1 Filed May 29-, 1936 July 26, 1938. c. s. BROSTROM I TOOL FOR OPERATING 0N SHOES Fil ed May 29, 1956 2 Sheets-Sheet 2 :0 I I f x nT a I 6 l I I l l 8 I I I AVVENTUR a /Mi $5M. y M

Patented July 26, 1938 UNITED STATES PATENT OFFICE United Shoe Machiner N. J., a corporation of y Corporation, Paterson, New Jersey Application May 29, 1936, Serial No. 82,556

2 Claims.

This invention relates to tools for operating on shoes and is herein illustrated and described as embodied in a tool for performing various operations such as channel flap laying and forepart or shank lasting. The tool illustrated herein is mounted upon a rotary spindle and is provided with a plurality of radially extending wiping members for exerting a frictional wiping or rubbing action upon the work.

It is an object of the invention to provide an improved tool of the character under consideration. As illustrated herein the improved tool is provided with a hub adapted to be mounted on a rotary spindle and having formed in it a plurality of radial guideways with a block slidably retained in each of the guideways carrying a pair of flaps of relatively stiff yieldable sheet material such as leather extending outwardly from each of the blocks. In the illustrated machine the blocks are urged outwardly by springs and are permitted to rock or tilt longitudinally with respect to the axis of the tool to accommodate the variations in the contour of the surface of the work. The leather flaps, by reason of the fact that they can yield inwardly, are enabled to engage the work over a considerable area and not merely along a line of tangency, as would be the case if they were not thus yieldable.

The various features of the invention will appear more fully from the following detailed description when read in connection with the accompanying drawings and will be pointed out in the appended claims.

Referring now to the accompanying drawings,

Fig. 1 is a view in side elevation of a machine provided with the improved tool;

Fig. 2 is a view in front elevation of the improved tool;

Fig. 3 is a sectional view taken on the line IIIIII of Fig. 2;

Fig. 4 is a fragmentary view in front elevation showing the tool in operation;

Fig. 5 is a fragmentary view in longitudinal section showing the tool in operation; and

Fig. 6 is a fragmentary plan view showing the tool in operation.

The machine shown in Fig. 1 consists of a frame It which rests upon the floor and which supports a pair of bearings l2. Journaled in the bearings i2 is a shaft or spindle l4 upon which are mounted a pair of fixed and loose pulleys I5 and IE, respectively. A belt 29 driven from any convenient source of power may be shifted from one to the other of the pulleys l6 and [8 by a belt shifter 22 of well-known construction.

The outer end portion of the spindle I4 is reduced in diameter, being indicated on the drawings by the reference numeral 24. Secured upon the reduced end portion 24 by a tapered pin 25 is a hub 26 consisting of a sleeve 28 which fits over the end 24 of the spindle and from which extends a disk 30. Formed in the disk 30 are a plurality of radially extending slots 32. These slots are open at the periphery of the disk 30 and extend inwardly only part way to the sleeve portion 28 of the hub 26. The slots 32 extend longitudinally with respect to the direction of the axis of the spindle l4 entirely across the disk 30, i. e. through the full thickness of the disk, being open at each face of the disk. In each of the slots 32 is slidably mounted a block 34. Secured upon the end faces of the disk 38 by screws 36 are a pair of disks 38 and 40, respectively. Each of the disks 38 and 40 is provided with an annular recess 42. The outer walls of the recesses 42 are formed by annular flanges 44 at the peripheries of the disks 38 and 40. The base of each block 34, i. e. that portion of the block which is closest to the spindle 24, is of greater width than the thickness of the disk 30 and has end portions 46 which extend into the recesses 42. The blocks 34 have a limited radial movement in the slots 32 but are held against displacement longitudinally, with respect to the direction of the axis of the spindle 14, by the disks 38 and 40. The blocks 34 may, however, rock or tilt longitudinally. The end portions 46 are beveled, as indicated by the reference numeral 41, to avoid jamming when the blocks thus rock or tilt. The blocks 34, at an intermediate locality which is radially outward from the portions 46, are recessed to enable them to extend out between the flanges 44. The flanges 44 thus interlock with the blocks 34 to limit theoutward radial movement of the latter. Bearing against the inner surface of each of the blocks 34 are a pair of springs 48 and 50 respectively, the inner ends of which are housed in radial recesses formed in the disk 30. These springs are spaced from each other in a direction which is longitudinal with respect to the axis of the spindle l4. The springs 48 and 50 urge the blocks outwardly as far as permitted by the flanges 44, and the springs may yield in unison or one spring may yield more than the other if the blocks are rocked or tilted longitudinally. The blocks 34 at their intermediate portions above referred to taper as they extend outwardly between the flanges 44 from a width just sufiicient to enable them to clear the flanges 44 to a considerably less width. The edges, indicated by the As shown in Fig. 3, each of the blocks 34 has an outer portion, beyond the edges 5| and out,- side of the flanges 44, which is considerably wider" than the tapered intermediate portion; Secured by bolts 52 against each of the side faces of the wide outer portions of the blocks 34 is a flap of degreased leather 54. Degreased leather has the frictional characteristics suitable for the operation to be performed. A fairly stiff leather is used for this purpose, for example sole leather or leather suitable for power transmission belting. Leather substitutes, particularly of fiber composition, may also be used. Each of the bolts 52 is provided with a nut 53, and sheet metal plates 55 are used on the outside faces of the flaps 54 in place of washers to provide bearing surfaces for the heads of the bolts 52 and for the nuts 53. In Figs. 2 and 4 the portions of the flaps 54 which are subject to the clamping pressure of the plates 55 are shown as compressed to less than their normal thickness.

The operation of the above-described tool in laying channel flaps is illustrated in the drawings wherein; is shown a shoe S mounted on a last L and having a lip or channel flap F. The base of the channel and the under surface of the flap F, as shown in Fig. 6, have been coated with cement prior to the flap-laying operation. Beginning at one end of the channel the operator presents the shoe to the tool and feeds the shoe progressively along the length of the channel. The rotationof the tool is such as to cause the flaps 54 to wipe outwardly against the margin of the sole and thereby to lay the flap F, causing it to adhere to the channel base. If it werenot for the fact that r the blocks 34 can yield inwardly there would be only tangential engagement between the flaps 54 and the shoe bottom and it would be necessary for the operator to present the shoe a second time or even a third time in order to wipe the channel flap F all the way to the edge of the sole. The prolonged engagement of the flaps .54 with the shoe bottom is illustrated in Fig. 4. As has already been mentioned, the interlocking engagement of the blocks 34 with the recesses 42 enables the blocks 34 to rock or tilt longitudinally with respect to the axis of the spindle [4, while the disks 38 and 40, however, hold the blocks 34 against longitudinal displacement or translatory movement. Such freedom of tilting enables the flaps 54 to accommodate themselves to the varying contours of the shoe, particularly at the shank portion, as illustrated in Fig. 5. It will be noted that in the illustrated tool the outer edge. indicated by the reference numeral 56, of each of the flaps 54 is convex and furthermore is obliquely directed away from the spindle M to avoid any likelihood of the toe portion of a shoe being operated upon from striking the spindle l4. The periphery, indicated by the reference numeral 58, of the disk 30 corresponds in outline to the edges 56 of the flaps 54.

It is evident that the above-described tool can be. used in a similar way upon the margin of shoe uppers to perform the operation of lasting.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent of the United States is:

l. A tool of theclass described comprising a hub adapted to be mounted on a rotary spindle, said hub having formed therein a plurality of guide slots extending radially and longitudinally with respect to said spindle, a block mounted in each of said slots for radial'movement and also for longitudinal rocking movement, a pair of springs acting upon longitudinally spaced localities respectively on each of said blocks to urge said blocks outwardly, a disk secured to each end of said hub and having an annular flange, each of said blocks having a relatively wide base which interlockingly engages said flanges to limit outward movement of the blocks and having a narrower intermediate portion which extends out between said flanges, said intermediate portion taperingwith convex curvature as it extends outwardly from a width just sufficient to clear said flanges at the base of the block to a considerably less width beyond said flanges, which shape affords freedom for rocking and insures centering of the blocks, and a flap of relatively stiff but yieldable sheet material arranged radially and longitudinally and extending outwardly from a portion of each of said blocks outside of said flanges for performing a Wiping operation upon a work piece.

2. A tool of the class described comprising a rotary spindle, a hub mounted on said spindle, said hub having formed therein a plurality of guide slots extending radially and longitudinally with respect to said spindle, a block mounted in each of said slots for radial movement and also for longitudinal rocking movement, a pair of springs acting upon longitudinally spaced localities respectively on each of said blocks to urge said blocks outwardly, a pair of disks detachably secured upon opposite end faces respectively of said hub, each of said disks having an annular flange which interlockingly engages said blocks to limit the outward radial movement of said blocks, said disks serving also to hold said blocks against longitudinal displacement, and a flap of sheet material secured to each of the side faces of each of said blocks at a locality outside of said flanges, said flaps extending radially beyond said blocks.

CHARLES G. BROSTROM.

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