US39847A - Improvement in last-machines - Google Patents

Description

' UNIT-ED STATES PATENT OFFICE.

JASON W. TOWN, OF SOUTH WOODBURY, VERMONT.

IMPROVEMENT IN LAST-MACHINES.

Specification forming part of Letters Patent No. 39,847, dated September 8, 1863.

T0 @ZZ whom t may concern:

Be it known that I, J. W. TOWN, of South Woodbury, in the county of Washington and State of Vermont, have invented a new and useful Improvement in Machines for Turning Shoe-Lasts, Ste.; and Ido hereby declare that the following is a full` clear, and exact description of the same, reference heilig had to the accompanying drawings, making a part ot' this speciiication, in which- Figure l represents a side elevation ot' my invention. Fig. 2 is a front elevation of the same.

Similar letters of reference indicate corresponding parts in the two figures.

The invention relates to an improvement in the guide or model wheel ot' a graduating last machine, arranging the saine in such a manner that without changing the cutters or pattern dii-ferent sizes of lasts can be produced.

To enable others skilled in the artito irake and use my invention,l will proceed to describeit.

Last-machines of the ordinary construction have but one size of guide or model wheel, or a part of wheel, which, ot' course, correspondsin size with the knives on the cutting wheel. With this arrangement the proportion cannot be maintained perfectly, and in order to accomplish this object it is indispensable there should be as many sizes of guides as there are different sizes of lasts to be turned by one pattern or model last, each guide varying in size so as to bear the same proportion to the pattern or model last that the cutting-wheel does to the last to be turned.

My invention therefore really consists in using, in a last-machine, different sizes of guides, and in order to have these guides conveniently placed and easy to manage, I have secured them to the periphery of a wheel, A, the middle of each guide a being located equidistant from the center of the arbor b, on which the wheel A rotates. The wheel A rests upon its gudgeons, and it should be located or. held in the desired position by a dog or pin inserted in one of the holes c in the side. It is turned by hand, and

that only when a different-sized last is to be turned. The guides are numbered from 4 to l2, and they gradually decreasein size. They are, however, so arranged that the edge of the wheel remains even on one. side.

In using my guides I proceed as follows: For instance, if B represents the model-last and O the last to be turned, D being the cutterhead, and if the model is a teninch one and right for a ten-inch cuttingwheel, with knives on a circle of one and one-half inch diameter, in order-to turn like the pattern, Whatever that maybe, the guide should be located with with the middle section (No. 8) to the pattern. If it is now desired to turn a No. 9 last from a pattern No 8 mans last, Iwould locate the section No. 9 ot my guide-wheel to the pattern. This section is smaller in all its dimensions than the previous section and to turn a No. 10 a still smaller guide is located toward the pattern butto turn a last smalh 1'V than the pattern a larger guide should be used in the same order in which they are numbet-ed.

My guides are applicable to all graduating lastmachineswith but little alteration in the other arrangements.

The variation in the width ofthe guides effects the length of the lasts, and by having them even on one side ot the wheel A the variation in length will all be one way, and it is only necessary that the lever which governs the length nt' the lasts should be spaced and marked according to circumstances.

Vhat I claim as new, and desire to secure by Letters Patent, is-

1. The employment or use of diierent sizes of guides in a last-machine, so that with theV JASON W. TOWN.

Witnesses:

SIDNEY O. WELLS, ORLANDO M. GIBBs.

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