US1668604A - Manufacture of shoes - Google Patents

Description

* r A. F. PYM V MANUFACTURE OF SHOES I Filed March 2.1922 7 2 Shuts-Sheet 1 v /N//EN7OR A. F. PYM

MANUFACTURE OF SHOES May 8, 1928.

Filed March 2,1922 2 Sheets Sheet 2 mVEN/TZH M? A v Patented May 8, 1928.

UNITED STATES PATENT-OFFICE.

ARTHUR F. r m, or LYNN, MAssAoHUsETrs AssIGNoB. TO UNITED siren momm- ERY CORPORATION, or rarnnson, NEW JERSEY, A conroammn or NEw 'ERsnY,

MANUFACTURE OF SHOES.

Application filed March 2,1922. ierial No. 540,600.

The invention relates to the manufacture of shoes, and is illustrated as embodied in a machine for use in seating lasts in shoes, as for example during the second lasting of turned shoes. I

In pulling'a turned shoe on the second last by means of a shoe horn in the usualmanner, whether the horn is operated mechanically or by hand, the operation is such as to permit comparatively little control. In some cases it is found that this results in having the shoe incompletely seated about the heel end of the last, or with the back seam twisted to one side of the median line of the last. This is especially the case when the still common hand releasing operation is applied to nailed-seat turned shoes, in which the upper materials are not at this stage in any way secured to the soles about the heel seat, and are consequently easily distorted. To a varying extent, however, these 'd-iiiiculties are met in connection with other shoes, the twisting ofthe back seam being less common'on sewed-seat shoes, and both difiiculties being minimized 1n relasting shoes mechanically on the more recently improved types of apparatus.

An important object of the present invention is to provide a readily-operable apparatus for correcting the above mentioned.

difficulties and improving the position of the shoes on their lasts, as hercinatter explalne-d.

l/Viththis object in view this invention, in j one aspect, is embodied in an improved type of pounding or bcating apparatus which, while also of general utility in other directions, is especially well adapted for pounding or beating'a second last down into the heelseat oi? a shoe thereon. In accordance with this feature of the invention a shoe having a last therein. is frictionally held while a series of impulses is imparted to the last in a direction to seat the last against the heel seat ofthe shoe. In the illustrated construction the shoe issupported' against the thrustflofthe last by members mechanically-actuated to. be brought into gripping engagement with the shoe and said members are arranged to be acted on by spring means forincreasing the gripping; action of said members automatically to compensate for the thrust of the hammer against thelast.

In another aspectmy invention comprises 'the provision of means, such as the abovedescribed shoe-gripping members or jaws, arrangedior manipulation to straighten a shoe on its last. As shown the shoe-gripping members are mounted so as to be twisted about an axis substantially normal to the-shoebottoi'n, for twisting the shoe longitudinally about its last to straighten the back seam.

Theabove and other aspects of the invention, including specific constructions and combinations of Parts and arrangement of actuating mechanism, will be apparent from the following description of a form of apparatus in which the invention maybe em bodied and which is illustrated in the ac companying drawings, in which Fig. 1 is a view partly in side elevation witlh a portion of the casing broken away; anc a a l Fig. 2 is a top plan view with the top 0t thecasing of the machine removed.

The machine comprises generally shoe engaging members or jaws and 12 and a hammer or heater element 14: arranged to pound against the top of a last in a shoe supported by the jaws to force it down into a the heel seat. I

Each of the jaws, which may be of any suitable construction, is formed on the front endot a lever 16 fulcrumed on pivots 18 carried by a sliding yoke 20which can move backwards and forwards in the machine on a spindle 22 to which it islceyed or pinned as by means of a key 21. Rearward motion of the yoke is limited by a suitable stopiii. Toggle links 24 connect the rear ends of levers 16 to a sleeve 26 surrounding spindle 22 and arran ed to break and straighten the toggle by sliding back and forth on the spindle. p 1

The motion of sleeve 26 is controlled by a lever 28 fulcrumed in the casing of the machine at 30 and formed at its upper end with pintles 32 engaging an annular groove in a sleeve 3% which engages a coil spring 36 which in turn operates on the sleeveQti. By this arrangement, movementoflever 28 acts throughthe connections described yieldingly to straighten toggle24: and close jaws 10 and 12 against a shoe and-last. The jaws and their associated parts are free to yield forwardly under the influence of the impulses of the hammer member 14 but since the sleeve 34 is held stationary by the lever the sleeve 26 against the coil spring 36 and the resistance of the spring to compression 'In order to provide for straightening a shoe on its last, as above described, each of the j aws is provided with a handle 38 to permit twisting of the jaws about the axis of the spindle 22. Since spindle 22 is loosely mounted in hearings in the casing, the jaws and associated parts carried thereby may be rotated by manipulation of either of the handles 38, and by holding the toe portion of the shoe and last stationary in the position shown in Fig. 1 by hand, such a twisting of the jaws will result in moving the shoe longitudinally about the enclosed last to straighten the back seam. The jaws are ordinarily held in springs 39.

The hammer 14 is pivoted on the casing of the machine at 40 and is constantly urged toward the work by torsion springs 42. It is arranged to be pulled back against the resistance of these springs by a link 44c operated by a lever 46 fulcrumed in the casing of the machine at 48.

The machine is arranged to be driven by a shaft 50, power being transmitted to the shaft by any suitable means such as a pulley 52 acting through gearing 54. Sleeves 56 and 58 are loosely mounted on the shaft and carry cams 60, 62 and 64 which control the operation of the machine. A clutch place by light coil member 66 is keyed to the shaft 50 between the ends of sleeves 56 and 58 and is formed with clutch faces on its opposite ends to en gage with corresponding clutch faces on the ends of the sleeves. The clutch member 66 is arranged to be moved axially of the shaft into engagement with the clutch face of either of the sleeves by means of a bell crank lever 68.

One end of lever 68 is connected by a bolt and slotconnection to a toggle 76 and is pulled to the left in Fig. 1 by a coil spring 72. The other end of the toggle 70 is controlled by a lever 74 pivoted in the casing of the machine at 7 6 and carrying a cam roll 7 8 arranged to engage the surface of the cam 60. The toggle 70 arranged to be broken as indicated in dotted lines in Fig. 1 by pushing upward on a treadle rod 80 by means of a suitable treadle. The opposite end of the bell crank lever 68, which is pivoted in the casing of the machine at 84, is connected to a treadle rod 86 which is arranged to be lifted by a second treadle.

' the spring By this arrangement, when a shoe is pre sented to the machine and held between the jaws 10 and 12, the treadle rod 80 may be actuated to break the toggle 70 whereupon 72 to pull the clutch member 66 into engagement with the clutch face of sleeve 56. The sleeve 56 will thereupon be rotated far enough so that the cam 62 will operate the lever 28 through the above described connections to close the jaws 10 and 12 against the shoe and last. During this operation the cam roll 7 8 will be allowed to fall into a depression in the cam 66 so that the toggle 70 will be allowed to straighten without any resistance from the spring 7 2. Immediately thereafter the cam roll 78 rides up on a projection on the cam and the lever 74 acts through the straightened toggle to push the lever 68 to throw out the clutch 66 and bring the machine to rest,

At this time the operator may manipulate the jaws by means of one of the handles 38 to straighten the shoe about the enclosed last. Thereafter he raises the treadle rod 86 by means of its treadle-operated bell crank lever 68, as is permitted by the slotted connection with the toggle 70, to bring the clutch member 66 into engagement with the clutch face of sleeve 58. As long as the treadle is held down therefore cam 64- will be operated to rock the lever 46 back and forth to operate the hammer member 14 to pound or beat the work, forcing the last down into the heel seat of the shoe. It will be noted that the cam 64 is formed with a gradual rise which rocks the lever 6 to pull the hammer member- 14 back against the resistance of the torsion springs 42 and that this rise is followed b an abruptshoulder or depression into w iich the cam roll carried by the lever 46 may fall suddenly so that the beating motion of the hammer is yieldingly effected by the springs 42 and not by the positive operation of the cam as is usual with pounding or beating devices used in the manufacture of shoes.

After the last has been beaten as long as is desired the operator releases the treadle so that the spring 72 throws out the clutch 66 and thereupon operates treadle-rod once more to break the toggle 7 0 and allow the clutch to be thrown in against the sleeve 56. The cam 62 thereupon operates to rock the lever 28 and open the jaws 10 and 12 to release the shoe and last. Thereafter the cam 60 acts to straighten the toggle 70 again and throw out the clutch 55 as above described. V

WVhile my invention has been described in connection with one form of apparatus shown in the accompanying drawings, it is not my intention to limit its scope thereby or otherwise than by pended claims.

will act through the lever 68 the terms of the apmesses claim as new and desire to secure by Letters.-

Patent of the United-States is: a a

1. In a machine of the class described, in COll'lblDtlt-IOIh co-operatmg members frictionally to engage and hold the sides. ofthe counter portion of a shoe having a last therein, a member to engage the top of a last in a shoe held thereby and impart pressure to the last to force it into theheel seat of a shoe, and mechanism to actuate said members,

2. In a machine of the class described, in combination, means yeildingly to grip the upper of a shoe on a last, and a device for applying pressure to the lastiu a direction to seat the last against the heel seat of the shoe, said means being constructed and arranged to grip the shoe more tightly as the force exerted by the device is increased.

3. In a machine of the class described, in combination, jaw members to engage opposite sides of a shoe, and means simultaneously to force a last into the heel seat portion of a shoe held thereby and force the jaw members together to support the shoe against the thrust of the last.

t. In a machine of the class described, in combination, means frictionally to hold a shoe, and means to impart a series of impulses to a last in a shoe held thereby in a direction to complete the operation of mounting the shoe upon the last.

5. In a machine of the class described, in combination, means frictionally to hold a shoe and last, means to impart a series of impulses downwardly against the cone of a last in a shoe held thereby, and auxiliary means to increase the friction with which the last andshoe are held at each impulse.

6. In a machine of the class described, in combination, members frictionally to engage opposite sides of a shoe, means for applying pressure to the shoe in a direction transverse to its length, a mounting for said members allowing them to yield with the shoe when said pressure is applied, and means to close said members on the shoe arranged to force them together when they yield.

'7. In a machine of the class described, in combination, a plurality of levers, each carrying a jawto engage a piece of work, and a mounting therefor allowing bodily movement of the levers to permit the work to yield in a direction transverse to the length of the shoe, said mountingincluding means to resist the yielding and to force the jaws together. I

8. An apparatus for straightening shoes on lasts comprising, in combination, a device for grasping a bottomed shoe on a last, and means for twisting said device relatively to the last to straighten the shoe on the last.

9. An apparatus for straightening shoes on lasts comprising, in combination, a de- V108 for grasping a bottomed shoe on a .last, and means for movin aid device relatively to the last to twist the shoe longitudinally about the last to straighten it.

10.1 Arr apparatus for the purpose described comprising, in combination, members to engage opposite, sides of a shoe'after the attaching of the sole, and means for twisting" said members about an axis substantially normal to the shoe bottom.

11. An apparatus for the purpose described comprising, in combination, members to engage opposite sides of the counter portion of a shoe, and means for twisting said members about an axis substantially normal to the shoe bottom.

12. In a machine of the class described, in combination, an instrumentality for operating on a shoe and last, and means engageable with the upper of the shoe and movable to straighten the shoe on the last during the operation thereof.

13. In a machine of the class described, in combination, an instrumentality for operating on a shoe and last, and means to twist the shoe longitudinally'about the last.

let. In a machine of the class described, in combination, jaws to grip a shoe and last, and manually-controlled means for twisting the jaws. l j

15. In a machine of the class described, in combination, jaws to grip a shoe and last, a mounting permitting twisting motion of the jaws, and a handle for manually controlling the twisting of the jaws.

10. In a machine of the class described, in combination, means frictionally to support a shoe having a last therein, a hammer for engaging the top of the cone of the last,

and a cam for operating said hammer to.

seat the last in the shoe.

17. A pounding machine comprising, in combination, means to grip and support the work, a member to engage the work, a cam to vibrate said member against the work, treadle-controlled mechanism for actuating said means, and mechanism under separate treadle control to actuate the cam.

18. A pounding machine comprising, in combination, jaws to grasp a piece of work, a member to pound work held thereby, and means to force the jaws together with a force varying according to the pressure exerted on the work by said member.

' 19. A machine of the class described comprising, in combination, a device movable to engage and support a piece of work, a member to impart a series of impulses to work held thereby, cyclic mechanism for moving the device to and from work supporting position, and operator-controlled mechanism operable for an indefinite period for actuating said member.

20. In a machine of the class described, in

itiil llO combination, means movable to support a shoe, an instrumentallty for operating on a shoe held thereby, a rotary powerwlriveir shaft, connections from said shaft to operate said means according to a predetermined cycle, and connections from said shaft to operate said instrumentality for an indefinite period under control of an operator.

name to this specification.

ARTHUR F. PYM.

CERTIFICATE or CORRECTION. Patent No. 1,668,604. Granted May s, 1928, m

ARTHUR F. PYM.

It is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as follows: Page 1, line 16, for the Word "releasing" read "relasting"; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 11th day of June, A. D. 1929.

M. J. Moore, (Seal) Acting Commissioner of Patents.

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