US59747A

US59747A - packarb

Info

Publication number: US59747A
Authority: US
Publication date: 1866-11-20
Anticipated expiration: 1883-11-20

Description

@uiten tsts @anni @frn IMPBOVED STONE SAWING MAGHINE.

FRANKLIN S. PACKARD, OF SPRINGFIELD, MASSAGIEIUSE'ITS.` Lener? Patent No. 59,747, .zaad November 20,1866.

SPECIFICATION- TO ALL WHOM IT MAY CONCERN:

Be it known that I, FRANKLIN S. IDACKARD, of Springfield, Hampden county, Commonwealth of Massachusetts, have-invented certain new and useful improvements in machine for sawing stone, and I do hereby declare that the following is a full and exact description thereof, reference being-had tothe accompanying drawings and to letters of reference marked thereon.

In the drawings, iig. 1 isaJ plan view of my improved machine; iig; 2 is a longitudinal vertical section of the same.

My' improvements consist in the manner of hanging the frame containing the saws, which I will now describe: l y

A is the frame, containing the saws a aa, moved forward and back by means of the cranks b b, and connections c c.

This frame is hung by means of the pieces d d, at the front end, to the slides e e, and at the rear end the standards ff are raised from the frame A, and the pieces g g connect with the slides h h.

I These slides, e e and h z, move in curved ways, k k 7o k", for a purpose hereinafter shown, and have cordsy vattached to them passing over pulleys Z Z Z Z, and attached to the windlass m, for the purpose of raisingand low'- ering the slides.

I hang the frame containing the saws in the manner shown, having one set of connections d d, reaching up `from the frame to which they are pivoted, and attached at the other ends to the sliders, and the other set of connections g g, reaching down from the standards ff, for the purpose of giving a rolling motion to the saws,

alternately raising and lowering the,ends,`instead of keeping them always at the same height, as would be thel case if both sets of connections were hung from above the frame, thus giving the saw an easier cut, by raising its forward end at each stroke forward, and rear end at each stroke backward, and then loweringv it, giving the saw a rocking or rolling motion, as before mentioned.

I form the guides in which the slides move on a curve, having its radins equal to .the distance from the center of the crank-shafasothat the connections d d, g g, when the crank is at its lowest point, and the frame in the center of its stroke, hang perpendicular, and not on an angle, as would be the case with straight ways; the advantage being that the stroke is always equally divided on eachl side of the centres of fthe cross-bars H H and the rolling motion before mentioned is preserved. t

These cross-bars ELI-I', I insert-for the double purpose of strengthening and separating. the connections d d and g g', and providing' pivots whereon to hang the same.

Now, having described my invention, what I claim as new and desire to secure by Letters Patent, is-

. 1. Producingthe rolling lor rocking motion of the saws by the arrangement of the connections d ol', gg', and standards f f", or equivalent devices arranged substantially as herein described.

2. Forming the ways or guides k 7c', c., for the slides e e and h h. on a curve substantially in the manner and for the purpose herein set forth.

FRANKLIN s. PACKARD.

Witnesses:

J. B. GARDINER, J. F. JONES.