US85294A - Improvement in hanging- saws - Google Patents

Description

.mwunggggggra www anni it 'www AMOS AlfE-LLKER, OF B AYl CITY MCHlG'AN.

Lette/rs Patent No. 85,294, dated December 29, 1868. l l

ROVEIVIENT IN HANGING SAWS.

The Schedule referred to in these Letters Patent and making part of the same To whom it may concern:

Beit known that I, Amos Fnnnknn, of Bay City, in the county oi Bay, and State of Michigan, have invented a new and useful Improvement in Method of lHanging Muley, Sash, or Gang-Saws; andil do declare that the following is a true-andaccurate description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon,l and being a part of this specification.

Figure l is a perspective View of my' invention.

Figure 2 isa side elevation, showing the position of the pitmen. v

Figure 3 is a plan view of the rock-shaft.

Like letters indicate like parts in each figure.

The object of this invention is so to hang sash'v or gang-saws, for sawing logs, that they will have an oscillating motion, by means of suitable connections at top and bottom, that, in their upward motion, they will be thrown back from the cut, thereby allowing the sawdust to fall, and preventing it from obstructing the util- ;ity ofthe saw in cutting, and so arranged, that, ,in the downward motion of the saw, it will be thrown forward in the out against the log.l l

In order to accomplish this end, I construct a mill in the following manner, as shown in the drawings:

A is the main driving-pulley, driven by any suitable power, and attached to the main shaft B, which runs in proper bearings, 0and to which is secured the crankwheel 1), provided with an appropriate wrist-pin, to which is attached, in the usual way, by a proper strap,

the pitn'ian E, whose upper end is rigidly attached to the rocl-shait F, which.is secured, by suitable straps, G, to the saw-frame H.

To the frame l, isA secured the stationary shaft J, provided'with join-nais, upon which the straps K play.

These str'aps are secured to the horizontal pitmen L, which, by means of suitable straps, are, in turn, secured to and give motion to the rock-shaft F and sawframe H. y

It will he noticed that the journals M upon the rockshai't, uponwhich the straps of the horizontal pitmen play, are not turned upon a true line with the centre of said rock-shaft, but are ecoentrics, or eccentric-j ournais, and are designed to assist in extending the sweep of the lower end oi' the saw in its forward and backward motion.

To the frame N is secured another stationary shaft, E, provided with suitable` journals, upon which play suitable straps, which secure the outer ends of the horizontal pitmen O, the other ends of which are secured, by other straps, to the stationary shaft Rwhich, in

turn, is rigidly secured to the top ofthe frame lH, and

controls the. motion of the upper end ofthe saw.

By this method of suspending or hanging saws, the use of slides and cross-heads, or their equivalents, is entirely avoided, thereby saving'much friction, and enabling the saws to be run with inuch greater rapidity than when operated in anyother manner.

It will be seen that the upperhorizontal lpitmen are somewhat shortened, so lthat at no time will the saw stand perpendicular, but will, at all times, be inclined towards the direction of its cut, by Which means the sawdust is more eii'ectually allowed to drop out of the cut.

By this method of obtaining both a reciprocating and oscillating motion of the saw, friction is saved, and speed gained.

The outer end s oi' all the horizontal pitmen being held at a fixed point, their inner ends are compelled to describe the arc of a circle in their motion, and give the same motion to the ends of the frame H, to which the saw is attached.

The rock-shaft and stationary shafts may be legnthi by Letters Patent, is-

'.lhe arrangement of the horizontal pitman O, sawframe H, rock-shaft E, having eccentric-journals M, pitmeu E and I1, and stationary shafts J and P, all arranged to operate the saw-frame H, substantially and for the purposes set forth.

AMOS FELLKER.

Witnesses:l

H. F. Enunfrs, CHARLES A. W. RICE.

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