US40344A - Improved sawing-machine - Google Patents

Description

j sawing-machine of simple construction, which gears, all being arranged in such a manner UNITED STATES y PATENT OFFICE.Y

JOHN L. KNOWLTON, OF BOBDENTOWN, NEW JERSEY.

IMPROVED sAw|NGMAcH|NE- Specification forming part of Letters Patent No. 40,344, dated October 20, 1863.

.To all whom it may concern.-

Be it known that I, J oHN L. KNowL'roN, of Bordentown, in the county of Buitreigw/nandf State of New Jersey, have inven l a new and improved machine for sawing timber in curved and bevel form-such as ship-timber; and I do hereby declare that the followin g is a full, clear, and exact description of the same, reference being had to the accompanying drawings, making a part of this specilication, in which- Figure l is a front sectional view of my invention, taken in the line x w, Fig. 2; Fig. 2, a side sectional view of my invention, taken in the line y y, Fig. 1.

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

The object of this invention is to obtain a may be adjusted or manipulated with the greatest facility for sawing ship and other timber in curved and beveled form.

The invention consists in placing the gate or sash of a reciprocating saw between guides which are attached to a graduated ring fitted between frictionrollers and provided with a concentric sector-rack, into which a pinion that the saw, while in operation, may be adjusted from a vertical to a more or less inclined position at either side of a vertical position, according to the bevel required.

The invention further consists in a novel manner of driving or operating the saw, whereby the latter may be operated or driven with equal facility at any angle or position in which it may be placed.

To enable those skilled in the art to fully understand and construct my invention, I will proceed to describe it.

A represents a framing, which supports a horizontal bed, B 5 and a a are two uprights, one being at each side of the framing, and connected at their upper ends by a crossbar, I).

G represents a ring, which may be of wood or metalcast-iron would be the preferable tween friction-rollers D, which are attached glo/the uprights a a, two to each upright, the

ange c fitting in grooves in the peripheries of the rollers D. 'Ihe front or face side of C there is a sector-rack, E, into which apinion, F, gears, said pinion being on a shaft," d, which has a hand-wheel, G, on its back end, and its bearings e attached to one of the uprights a.

To the ring G there are attached two parallel guides, ff, said guides being at opposite sides of the ring, and between these guides a saw frame or sash, H, is fitted and allowed to work freely.

I is the saw, which is secured in the frame or sash in the usual or any proper way, said saw moving through a hole, g, in the bed B.

The lower cross-bar, h, of the frame or sash H, is attached to a bar or slide, z', which is fitted between pendent guides j j, attached to the lower part of the ring O, and the slide t' is connected at its lower end by a pitman, J, with a crank-pulley, K, on the inner end of a drivingshaft, L, which is in a plane that passes through the center of the ring C.

The operation is as follows: The shaft L is rotated by any convenient power, and a reciprocating motion is communicated to the saw frame or sash H from the shaft L by means of the crank-pulley K, pitman J, and slidebar z'. The stuff or timber to be sawed is placed upon the bed B, and fed to the saw by hand or by any other suitable feed mechanism, and the saw I, while in operation, is adjusted in an inclined position, either to the right or left, to suit the bevel required to be given the timber, and as this bevel in shiptimber is continually varying, the saw I is moved or adjusted accordingly by simplyT turning the hand-wheel G, the pinion F on shaft d, and sector-rack E on ring O, causing the latter to turn, and with it the saw I. The graduated front of the ring O serves as a guide to the adjustment of the saw, while the timber is marked at different points, indicatmaterial. Ilhis ring G is provided at its periphery with a flange, c, and fitted being the bevel that is to be given it.

Having thus described my invention, what the ring C is graduated into degrees, aas shown in Fig. l, and at the back of thc'ring I claim as new, and desire to secure by Letters 2. Operating the saw frame or sash H Patent, isthrough the medium ofthe slide z', pitman J,

l. The attaching.;` of the saw frame or sash and crank-pulley K, all arranged substantially H t0 a ring, C, fitted Within friction-rollers as described.

D, and turned or adjusted by means of the JOHN L. KNOVVLTON.

seotorraok E and pinions F, or their equiva- Witnesses:

lents, substantially as and for the purpose set GEORGE W. PITMAN,

forth. JOHN B. HULsE.

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