US246380A - Steam saw-mill - Google Patents

Description

2 Sheets-Sheen; 1..

(No Model.)

A. J. EMLAW.

STEAM SAW MILL.

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(No Model.) 2 Sheets-Sheet 2.

A. J. EMLAW. STEAM SAW MILL.

No. 248,880. ted Aug. 80,1881.

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NITED STATES PATENT OFFICE.

ANDREW J. EMLAW, OF GRAND HAVEN, MICHIGAN.

STEAM SAW- M I LL.

SPECIFICATION forming part of Letters Patent No. 246,380, dated August 30, 1881.

Application tiled September 24, 1880. (No model.)

To all whom it' may concern:

Be it known that I, ANDREW J. EMLAW, of the city of Grand Haven, in the county of Ott-awa and State of Michigan, have invented certain new and useful Improvements in Steam Saw-Mills, of which the following is a specification.

My invention relates to a steam saw-mill in which the saw-frame is attached directly to and is operated by the piston-rod of the steamcylinder, the attachment being made at the center of the lower side of the saw-frame, as shown, and having no other attachment or connection with the piston-rod or machinery; and the objects of my invention are, first, to render unnecessary the machinery usually employed in connecting the saw-frame with the piston-rod second, to give a straight up-anddown stroke or movement tothe saw-frame, preventing the tendency to a reciprocating` horizontal motion, which is caused where the sides of the frame are attached by pitmen to the machinery ofthe engine; and, third, to give a straight elastic stroke to lthe saw. I attain these objects by the mechanism illustrated in lthe accompanying drawings, in which- Figure l is a vertical sectional view of a steam saw-mill through the line a' w, showing the hat side of the upright saw; and Fig. 2 is a sectional view of the same on the same vertical line, but having its plane at right angles to the plane shown in Fig. 1.

Similar letters refer to similarparts throughout the several views.

In the drawings, A A represents the frame supporting the several parts of the machine.

S is a saw or a gang of saws, supported by the saw frame or sash WWin the usual manner. The saw-frame W W is attached from a point at the center ot' its lower side in any suitable manner to the piston-rod R.

To the piston-rod R is attached the pistontached to the-saw-frame.

The saw-frame is not connected with any other machinery, and is not veered or drawn from a straight tip-and-down stroke, and the lower end of the piston-rod, which projects below the lower end of the upright cylinder' C, is connected with and operates the several parts of the engine.

I am aware that other steam saw-mills have the saw-frame worked by the piston-rod, and I do not broadly claim such device; but I know of no mill in which the saw-frame is operated from the upper end of' the piston-rod, and the Valve machinery ot' the engine is operated by the lower end ofthe piston-rod, projecting through and below the cylinder, and none in which the saw-frame is not connected by means ot' cranks and pitmen to the machinery operating the valves of the steamchest.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, 1s-

rEhe combination herein set forth ot' the sawframe W W, piston-rod R, to the upper end of which said Saw-frame is attached, uprightl cylinder G,crank K, and shaft H, arranged as described, without other intervening mechanism between the valve machinery and the sawframe.

ANDREW J. EMLAW.

Witnesses:

ARTHUR C. DENIsoN, EDWARD TAGGART.

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