US1330905A - Last - Google Patents

Description

1. c. SCH ELTER.

LAST.

. APPLICATION or. 26. 1915. v

1,330,905, Patented Feb. 17,1920. Y

' ITED STATES IATENT OFFICE.

JOHN CARL SGHELTER, OF ROCHESTER, NEW YORK, ASSIGNOR T0 FITZ-EMPIRE DOUBLE PIVOT LAST COMPANY, OF AUBURN, MAINE, A CORPORATION OF MAINE.

LAST.

Specification of Letters Patent.

Patented Feb. 1'7, 1920.

V Application filed October 26, 1915. Serial No. 58,025.

To all whom it may concern:

Be it known that I, JOHN C. SGH'ELTER, a citizen of the United States, residing .at Rochester, in the county of Monroe and State of New York, have inventedcertain Improvements in Lasts, of which the following description, in connection with the accompanying drawings, is a specification,

like reference characters on the drawings indicating like parts in the several figures.

This invention relates to'lasts and in particular to the jack pin thimbles and anvil pins used in the heel portions to support the lasts against the stresses incident to the heeling and other making operations. Difliculty has heretofore been experienced in supporting the heel portion of a last under the pressure of the lasting sole laying, leveling and heeling machines. Two practices are resorted to in using these machines. According to one procedure, the last is supported by contact with the top of its cone. The difficulty inherent in this practice is that the lining of the shoe is often pinched. and torn between the top of the last and the supporting jack. In addition the cone of the last is sometimes so thin that it is unable to withstand the stress of the operation and is crushed. In the other procedure the last is supported on a jack pin which reaches to the bottom of a metallic thimble mounted in the heel part. The entire stress of the machine operation is thus transmitted through the thimble which is frequently driven into the wood, shattering the heel part of the last. It is the object of my invention to provide a last which shall obviate these and other disadvantages inherent in lasts heretofore used and which shall be cheap to manufacture.

A feature of my invention is in a last having a jack pin thimble with its end seated upon an anvil pin, and constructed and arranged to be spread upon being driven into place upon the anvil pin.

Another feature of my invention is in an anvil pin having a cellular structure.

These and other features of the invention comprising various combinations and arrangements of parts will be best understood and appreciated from the following description of a preferred embodiment thereof selected for purposes of illustra tion and shown in the accompanying drawings in which,

Figure 1 is a side elevation of a last with a part of the heel portion broken away to showmy improved thimble and anvil pin.

Fig. 2 is a transverse cross section on the line 2-2 of Fig. 1, and

Fig. 3 is a cross section on the line 33 of Fig. 2, showing the position of the thimbie just previous to its being driven into p ace.

The heel portion 10 has the ordinary vertical hole 11 bored in it to receive the jack pin thimble. At the bottom of this hole 11 a transverse hole 12 is bored from the side' of the last to communicate with it. In this hole 12 is seated the anvil pin 13 which, as shown in Fig. 2, is flared downwardly to correspond with the tapering cross section of the last at this point, the purpose of this flare being to give the anvil pin a greater bearing surface upon the wood underneath it. The pin 13 as shown is hollow with reinforcing webs, thus affording a cellular structure which is very resistant to stress and at. the same time light and economical. The pin may, however, be solid if desired. The jack pin thimble 14 is recessed at its bottom at 15 to fit over the anvil pin 13. This recess is, however, slightly smaller in cross section than the corresponding portion of the pin 13 so that, as shown in Fig. 3, it will not sli down over the pin 13. After the thim le has been placed as in Fig. 3 it is seated upon the anvil pin 13 by a heavy blow. This blow spreads the ends 16 of the thimble as shown in Fig. 1 and thereby binds the thimble firmly in the wood. The upper part of the thimble may have a rim 17 which seats in a recess 18. A plug 19 may be inserted in the end of the hole 12 to fill out the surface of the heel portion of the last.

It will be observed that the cellular structure of my anvil pin materially reduces the weight of a last. It is of great importance to reduce the weight of a last as far as is compatible with strength since an operator who handles hundreds of lasts in a day will experience much additional weariness and will do correspondingly poorer work if an extra ounce is added to each last. He will also consequently drop many more shoes and the percentage of cripples in the factory will be materially increased. My cellular structure is of peculiar importance in an anvil pin which is flared parallel to the lateral surface of the heel since such a pin if made long enough to take full advantage of the entire available supporting surface below it will be heavier than pins heretofore used. The making ofsuch a pin 7 holloiv, as I have shown, enablesvthe manufacturer to take'advantage of the maximum available supporting surface for the anvil pin in the heel and at the same time enables him actually to decrease the weight of his last.

My invention possesses among others the following advantages. The thimble, having its ends clenched in the wooden heel portion, will not become loose and jar out. The

stress of the heeling blo-wis transmitted through the metal thimble to the metal anvil pin which, as shown in Fig. 2, has a bearing over nearly the entire width of the thickest part of the heel.

Having described my invention, what I claim as new and desire to secure by United States Letters Patent is i 1. In a last, an anvil pin, and a jack pin thimble having itsinner end constructed and arranged to be seated upon and spread by said anvil pin when driven into place.

2. In a last, a cylindrical anvil pin and a jack pin thimble having a substantially cylindrical recess on its inner end, said recess being smaller than the corresponding portion of said anvil pin, whereby when said thimble is driven into contact with said anvil pin the sides of said cylindrical recess will be spread into posing the last. r

3. In a last, a hollow reinforced anvil pin.

4. In a last, a cellular anvilpin.

5. In a last, a hollow anvil pin having reinforcing webs.

6. In a last, a cellular anvilpin inserted in the tapering part of the cone, and having its end faces in planes oblique to the axis of the pin and substantially parallel to the surface of the last at the ends of the pin.

In testimony whereof I have signed my name to this specification.

JOHN CARL SCHELTER.

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