US126808A - Improvement in wood-sawing machines - Google Patents

Description

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FRANZ L. HARTEN STEIN AND SAMUEL HYMAN, OF NASHVILLE, TENNESSEE.

IMPROVEMENT IN WOOD-SAWING MACHINES.

Specification forming part of Letters Patent No. 126,808, dated May 14, 1872.

by foot, hand, or other power. The first part of the invention 'relates to the operating mechanism 5 and consists in a combination of gearwheels, shafts, crank-disks or cranks, a connecting-rod, and iiy-wheel for operating the reciprocating frame or sash through the medium of spur-wheel and rack. The invention further consists, secondly, in saws adjustable as to distance apart, and further adapted, by spring-supporting arms for cutting fire-wood, the same projecting in front of the sash as required, being adapted to be applied and used without detaching the scroll-saw, and to be readily detached as required when the latter is to be used. Thirdly, in a supplemental table attached by screws, for use in place of the {ire-wood carriage, in connection with the scroll-saw.

Figure l is aperspective of the machine in normal condition, with the fire-wood, saws, and carriage, and the supplemental table, all detached, the position of theformer being indicated by dotted lines, and fragments ofthe frame and sash omitted to expose parts behind. Fig. 2 is a plan, partly in section, representing the machine as arranged for sawing fire-wood. Fig. 3 is a perspective of the iirewood carriage; Fig. 4, a like View of the 'supplemental table. 4

In carrying out our invention wc employ a frame, A, which may be of wood or metal, being so constructed as to furnish suitable bearings, z, for the several shafts, vertical guides y, for the saw-frame or sash, and a horizontal table, m, behind the latter, and a corresponding horizontal surface, w, in front of the same. Mounted transversely of this frame, in the bearings z, are three shafts, B (l D. The first of these shafts, B, is the driver, and may be connected by crank@ and pitman E to atreadle, F, or adapted by crank or pulley to be driven by hand or by a steam-engine, or Vother motor. This shaft carries a spur-wheel, G, meshing with a pinion, H, on the second shaftO, which rotates with multiplied speed and carries the iiy-wheel I. The third shaft, D, carries one or more spur-Wheels, J, meshing with a rack or racks, u, on the upright bars of the sawframe or sash K, and is oscillated to reciprocate said sash by connection, through a long crankarm, or its equivalent, L, connecting-rod M, crank-disk or crank N, pinion O, and spurwheel P, to the drivin g-shaft B, the said crankdisk N and pinion O being mounted on a studshaft, Q, or its equivalent. The horizontal bars of the sash K are adapted for the attachment, centrally, of the upright scroll-saw R. On each side of this there are vertical slots t, to receive bolts s which pass through and secure the sprin g-arms S, by which the fire-wood saws T are attached the said arms being so bent as to embrace three sides of the bars of the frame, as shown in Fig. 2, to secure the requisite support. The slots t permit the adjustment of the saws T to any desired distance apart within the width of the sash, to provide for cutting wood in different lengths. Arranged in the front horizontal surface w of the frame A are rollers U, to support the fire-wood carriage V, Fig. 3, shown in position in Fig. 2. The wood is supported at the front edge of this by the upturned ends of longitudinal metal bars r. A recess, g, in the saine receives the saws. It is supported laterally by flanges p, is drawn back inuse by a weight, W, attached to a cord, X, running over a pulley, Y, and secured in a ring, o, at the rear edge of the carriage, and is stopped by a cleat, n, on its under side. When the scroll-saw R is to be used the fire-wood saws T, carriage V, and their removable appurtenances are detached, and the supplemental table Z is applied to the surface w, and attached by screws m, its inner end fitting into the space between the sash, sash-guides, and saw.

The operating devices work as follows: Rotary motion being imparted to the drivingshaft B by the treadle F or its equivalent, the same is imparted, multiplied as to speed through thespur-wheel G and pinion H, to the secondary shaft C and the fly-wheel I, and multiplied as to power through the spur-wheel P, pinion O, crank-disk N, connecting-rod M, crank-arm L, shaft D, spur-wheel or wheels J, and rack or racks u to the saw-frame or sash. The mode of driving the saw secures a steady, powerful movement, the speed of which may be regulated :is desired. rl`he fly-wheel, as urrunged, eren at very slow speed, carries the cranks past their centers infullibly, und insures regular movement.

We elaizn us new herein und of our invention- 1. The combination of the rotary driving"- shaft B, spur-Wheel l), pinion O, e1unk-dsl N, connecting-rod M, crank-arm L, shaft D, spur-wheel or Wheels J, and mok or racks u, arranged and operating substantially as de scribed, for reciprocating the saw-freine or sash K.

2. The combination, with said mechanism, vB P 0 N M L D J u, ofthe spur-wheel G. pinion H, secondary shaft C, and ily-wheel I, for

the purposes specified.

substantially as represented und described, for

the purpose setforth.

. FRANZ LUDWIG HARTENSTEIN.

SAMUEL HYMAN.

Witnesses:

J. W. NnUeEs, JN0. T. OAssnTTY.

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