US113703A - Improvement in sawing-machines - Google Patents

Description

timidi ndesind i' tido.

Letters Patent No. 113,703, dated April 1l, 1871.

IMPROVEMENT IN SAWlNG-MACHINES.

The Schedule referred to in these Letters Patent and' making part of the same.

To all whom it may concern Be it known that I, JEROME B. SWEETLAND, ot'

Pontiac city, in the county of Oakland and in the State of Michigan, have invented certain new and useful Improvements in Revolving VVood-saw, Bucks and do -hereby declare that the following is a full, clear, and exact description thereof, reference being had-to the accompanying drawing and to the letters of reference marked thereon making apart of this specification.

The nature of my invention consists in the construction and arrrangemeut of a revolving wood-saw buck,1 as will be hereinafter fully set forth.

In 'order to enable others skilled in the art to which my invention appertains -to maire and use the same, I will now proceed to describe its construction -and operation, referringto the annexed drawing, in

Through the center of this plate passesan upright` shaft, G, which has its lower bearing in a suitable box upon the frame of the machine, to which it may be attached, this lower bearing being further so arranged that the shaft may be raised up for a certain height without removing it from ythefbealing.

At the upper end of the shaft O is secured the upper swinging or revolving plate D of the saw-buck.

Both 'of the plates B and D are circular, and the upper plate of somewhat larger diameter than the lower. A

On the plate D are two V-shaped standards, E E, forming the buck, upon which the wood is laid to be sawed,the inner edges of one or both of said stainlards being toothed, as shown in iig. l, so that when the binder is brought down on `top of thewood it will be held iirmly and-prevented from turning on the buck.

The binding attachment consists of a lever, G, pivoted to a standard, H, which rises from the swinging plate D, near its edge, the lever crossing the wood at right angles.

' 0n the standardI-I are several holes, in either one of which the lever G may be pivoted so as to adjust the same to any thickness of the wood desired to be sawed.

The under edge of the lever G is concave and toothed asshown in 'g. 1, so that when brought down and held upon the wood it will, in connection with the toothed standard E, hold the wood iirmly.

'Directly opposite the standard H is a smaller' standard, I, at the upper end of which is pivoted an inverted segmental ratchet, J.

This ratchet passes through a mortise formed in the lever G, and meshes into corresponding notches in the lever, and is secured by means of a cam, a, which is pivoted in said mortise on the lever, and presses against the back ofthe ratchet. v

On the shaft O is a pulley, K, which, by a chain, b,

and spiral spring d, is connected with a post or stand-l ard ofthe sawing-machine, for a purpose that will be presently described.

On the stationary plate B, on the upper side, is a lug, e, which fits` in either one of two holes made in the plate D, so as tohold thisplate steady with either one of the buck-standards E toward the saw.

There is also a' lever', L, pivoted to an arm ou one of the standards A. which is connected with the shaft C in suoli a manner-that, by raising said lever, the shaft will be raised, at the same time lifting the plate kIl) high enough up t0 clear the lug e out of its hole.

- Supposing the. swinging plate D has beenturned so as to wind lthe chainb on the `pulley K, the plate D being lowered by the lever L so as to be held in Y that position by the lug e, then that end of the wood may be sawed oli.

' Instead of now moving the wood o n the standards E it will only ne necessary to raise the lever' L, when the spring d will cause the plate D with lall its attaehments to swing around until its drops down with the lug c in the hole ou the opposite side, when the other l. An adjustable or swinging buck, operated by means of a spring or its equivalent, substantially as 'and for the purposes herein set forth.

2. In combination with the shaft C and plate D, the lever L, substantially as and for the purposes herein set forth. Y

3. The combination of the shaft C, pulley K, chain l), and spring d, constructed and operating substantially as and for the purposes herein set forth.

In testimony that I claim -the foregoing I have hereunto set my hand this 9th day of August, 1870.

. JEROME B. SWEETLAND.

Witnesses C. L. Evnn'r,

Images