US15893A - Adjustable stirrup for sawmill-pitmen - Google Patents

Description

UNTTED sTATEs PATENT OFFICE SAML. C. NRGROSS, OF DIXFIELD, MAINE.

.AIDJ'US'I "ABLIEIv STIRRUP FOR SAW'MILL-PIIMEN'.

Specification of Letters Patent No. 15,893, dated October 14, 1856.

To all whom t may concern:

Be it known that I, SAMUEL'C. NonoRoss, of DiXield,.in the county of Oxford and State of Maine, have invented a new and useful EXtension-Stirrup for Saw-Pitmen, of whichthe following is a full, clear, and eXact decription, reference being had to the accompanying drawings, making part of this specification, in which- Figure l is a longitudinal section through the stirrup and end of pitman on the line X X of Fig. 2. Fig. 2 is an end view of the same.

It is found in practice that in sawing small logs, but. a part of the length of the face or toothed side of the saw becomes dull from use; but in order to keep the face straight it is necessary to le down all the teeth, whether they have become worn or not.

The avoiding this useless ling of the teeth which have not been worn, is the object of my invention. This I accomplish by altering the length of the pitman, thus bringing a fresh portion of the face of the saw into use.

To enable others skilled in the art to make and use my invention, I will proceed to describe the manner in which I have carried the same into elfect.

A is the pitman; B, the stirrup; C, a bolt which passes through them and is secured by a nut c.

D, is a key which is passed through slots in the stirrup and pit-man, and on top of which the wedge key D is driven, securing the stirrup rmly in its place.

E, Figs. 1 and 2, is a pin having a square shoulder in the middle, secured in the end of the stirrup by the wedge keys F, F. To this pin the saw is secured in the usual manner.

The stirrup B fits over the end of the pitman A and is secured thereto by the bolt C, and keys D, D. When it becomes necessary to lengthen the pitman, the bolt and keys are removed and the stirrup is drawn out to the position seen in red in Fig. l, and there secured bythe bolt and keys as before. It is evident that in this manner the length of the pitman, and with it the position of the saw may be varied as required.

I do not claim the bolt E by which the stirrup andpitman are secured to the saw. But

What I do claim is The manner of attaching the stirrup to the pitman substantially as herein set forth; whereby its position on the pitman and consequently the length of the pitman may be varied for the purpose of altering the position of the saw with respect to thel log.

S. C. N ORCROSS.

Witnesses:

JOHN B. MARRow, CALviN STANLEY,

Images