USRE2471E - Improvement in sawing machines - Google Patents

Description

@uitrit gratta @anni @frn SPARROW M. NICKERSON, or CHICAGO, 'I LLiNolsQAssieN'EE or oALvIN I TO ALL WHOMiI'l MAY CQNCERN:

J.. HOLMAN.

Letters Patent No. 40,837, datedl December 8, 1863; reissue LVO. 2,471, elated January 29, 1867.

IMPROVEMENT IN SAWIANG MACHINES.

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Be it known that CALVIN J. II'OLMAN, ofOshkosh, in the county of Winnebago, and State of Wisconsin, hath invented a certain new anduseful Improvement in Stave-Sawing Machines, for whiclrLet-ters Patent of the United States were issued to him, bearing date on thc eighth day of December, in the year of our Lord one thousand eight hundred and sixty-three; and I, SPARRUW M. NICKERSON, sole assignee of said patent, of Chicago, in the county of Cook, and State of Illinois, do hereby declare and make known that the followingis a full, clear, and exact description of the same, reference being had to the accompanying drawings, and the letters and figures marked thereon, which form part of this specification.

To enable those skilled in the art to understand how to' construct and use this invention, I will proceed to describe its construction and operatien with particularity, making reference in so doing to-the aforesaid drawings,

Figure 1 represents a perspective view of the saw.

Figure 2 is atransverse section taken at the line x y, in fig. 3; and

Figure 3 is a side elevation of the machine, the saw being removed.

Similar letters of reference in the several figures denote the same parts of the invention or machine.

The saw is of a cylindrical form, as shown at A in the drawings, having teeth upon one end, which saw is supported and kept in the required circular form by means of a system of friction-rollers or drums, marked a, arranged within it. v The shafts s-of the said friction-rollers, which sustain the `saw in position, are arranged and supported -in suitable boxes in the -circular end pieces B, which are connected together by means of bars b. The said rollers or drums a have flanges f upon the rear end, `so as to prevent the saw from sliding olf when in operation. Each of said supporting rollers is constructed in two parts,v or rather there are two supporting rollers r on each shaft s, the one next to the teeth of the saw being adjustable by means f a set-screw by which itis saw wears out and becomes narrower. Upon' the 'shaftsof thessupporting rollers are pinions c which gear into the pinion d upon the shaft e, whose axis'coincides with'the axis of the saw. No frame is represented to supsecured to the shaft, and being placed at a short distance from the other. roller, it can'bc moved back as the port the machinery hereinshown and referred to, which may be arranged upon any suitable frame.` The saw may be'driven by means of a belt upon the drum upon the shaft e, or by a belt passing directly around the saw, whichI consider the preferable mode, and in that case the revolution of, the saw upon the rollers Within may be utilized as a power by means of the shaft c, and a drum or gear-wheel upon it to propel the carriage which feeds the stave-bolt to the saw, or for any other purpose. In fig. 2 the position o f the-belt around the saw isindicated by dotted lines. The rollers arranged within the saw willv also. serve to brace and keep the saw in thc'proper shape under the pressure ofthe belt, and to otherwise strengthen and regulate its operation. The pinions c c c c and d may be dispensed with if desired, having the motion of Vthe rollers communicated to the drum shaft c by means of frictional' gearing in such case. The bolt or piece of wood to be sawed is fed to the saw at L f. upon any suitable reciprocating carriage, and the staves as they are cut fall upon the table or rest c c. from which they will be pushed by the succeeding pieces as they are cut. i

Having described the construction and operation of this invention, I will specify what I claim, and desire to secure by Letters Patent 1. I claim supporting the saw upon the rollers ap within the saw, one of which is adjustable, so as to adapt i the rollers to the wearing out of thesaw, substantially as herein described.

2. I claim so arranging the saw A upon interior supporting rollers and theil shafts in such a manner that the saw A, revolved by a band passing around it, as before mentioned, will communicate power, through the medium of the interior rollers and shafts, to. otherrtparts of the machine or other machines, substantially as herein` specified and shown. l

SPARROW lVLNICKERSON.

Witnesses:

W. E. Manns, J. L. Coruna.

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