US17454A - Portable crosscut-sawing- machine - Google Patents

Description

I s. SGOTTONQ PORTABLE GROSSOUT SAWING MACHINE. No. 17,454.- PATENTED JUNE 2, l85'7.'

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UNITED STATES PATENT OFFICE.

STEPHEN SCOTTON', OF RICHMOND, INDIANA.

PORTABLE CROSSCUT-SAWING MACHINE.

Specification of Letters Patent No. 17,454, dated June 2, 1857.

To all whom it may concern:

Be it known that I, STEPHEN SooTToN, of the county of Wayne and State of Indiana,

have invented a new and useful Improve-- ment in Machines for Cutting Trees and Sawing 00d; and I do hereby declare that the following is a full, clear, and exact description of the construction and operation of the same, reference being had to the annexed drawings, making a part of this specification.

A, A, A, A, A, A, constitutes the framework of the carriage which may be constructed for the most part as delineated in the drawings.

B, is the cylinder of an ordinary steam engine secured upon the timbers A, A.

C is the T-head. D, the pitman. E, engine crank. G, the fly wheel shaft.

H, H, is the piston rod sliding in stuffing boxes in each end of the cylinder. The end of H, which is not connected with T-head C, receives the sawframe I. There are two holes in the end of H, whioh'cut each other at right angles, and which. by the assistance of pins retain the sawframe in either a horizontal or perpendicular position.

I is the sawframe attached to the piston H, by the pin i near its middle. It is rectangular in form and its sides are slides or ways for the sliding saw block J. At its upper end is a winch and ratchet wheel j, which serves the double purpose of raising and lowering the saw block J, when the rack I is in a perpendicular position, by means of cord or belt is, which passes from the axle of ratchet through saw block J, to pulley m, one cord being fastened in block J, and the other running free. This com bination also by means of catchbar Z acting on ratchet j is made to feed the saw up to the tree when the saw K is in a horizontal po-' sition.

J is a sliding block borne upon the sides of the frame I. It carries the saw K.

K is a cross cut saw attached to the saw block J, by means of a bolt n. It has a long slot 0 which in use should be a little longer than the stroke of the saw. The saw is retained by this bolt a, passing through the slot 0, which bolt is screwed up to a sufficient tension to prevent slipping with the ordinary strain of sawing, and still to allow the saw to slip in case it should catch by sudden pinching or closing of the log.

L, M, are two toothed wheels connected by i a hub 79. There is a groove around the middle of hub p, in which the end of lever W is retained. Upon the end of shaft G are two small pinions, one of which may be made to gear with wheel L and the other with wheel M.

The wheels L and M have three positions, the first in which they are both free from the pinions on shaft G. The second with wheel M in contact with its pinion on shaft G, by means of which a good traveling speed can be attained. The third with wheel L in contact with its pinion upon shaft G, whereby a very slow motion may be had for setting the machine for cutting off logs, &c.

O, is the shaft upon which the driving wheels P, P, are placed. It has also upon it the wheels L, M, and hub 29, which slide freely upon it, but revolve with it.

Q, is a jointed dog by means of which the carriage is retained at a proper distance from the tree or log. By means of a nutat its inner end it may be made to play either laterally or perpendicularly. It has upon its outer end a block R, upon which the saw rests in starting to fell a tree. The dog should be driven in at a proper height to bring the saw upon a level.

It is proper to remark that this machine secures direct action of the steam in sawing.

'and the engine is started. At every stroke the ratchet j is propelled by catch bar I, by means of which the saw is fed up to the tree into which a wedge is driven behind the saw if necessary, until the felling of the tree is accomplished.- For cutting logs the machine is stopped near the butt of the tree or log, rack I, being in a perpe ndicular position. Saw K is lowered onto the log, dog Q, is driven in and the saw started desoending with its own weight as it cuts through the log. A wedge may also be driven here if necessary. The saw is then raised out of its out by means of winch and ratchet j and belt is. The driving wheels I, P, are then thrown into gear and the machine moved up as far as required and the same operation renewed. Its whole operation is simple and rapid and it is not liable to be deranged or broken by slight causes.

I do not claim attaching a saw or saw frame to the piston of a steam engine, or

the use of a simple dog to attach the machine to a tree or log, for they are both embodied in a patent granted to Samuel R.

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