US841516A - Sawing-machine. - Google Patents

Description

No. 841,516. PATENTED JAN. 15, 1907.

B. B. HARRELD.

SAWING MACHINE.

APPLICATION FILED MAY 5, 1906.

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B. E. HARRELD. SAWING MACHINE.

AfPLIGATION FILED MAY 5, 1906.

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APPLICATION FILED MAY 5, 1906.

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B. B. HARRELD. SAWING MACHINE.

APPLICATION FILED MAY 5, 1906.

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BENJAMIN E. HARRELD, OF ELDON, IOWA.

SAWING-NIACHINE.

Specification of Letters Patent.

Patented Jan. 15, 1907.

Application filed May 5.1906. Serial No. 315.812.

To all whom it may concern:

Be it known that I, BENJAMIN E. HAR- RELD, a citizen of the United States, and a resident of Eldon, in the county of Wapello and State of Iowa, have invented an Improved Sawing-Machine, of which the following is a specification.

My invention is an improvement in that class of machines in which the saw is reciprocated horizontally by cranks and means are provided for raising and lowering the saws to allow the insertion of a log or stick beneath them and to place them in working position thereon.

The invention is more particularly an improvement in portable sawing-machines which are mounted upon front and rear trucks, the front truck being adapted to be detached when sawing is to be done.

The invention is embodied in the construction, arrangement, and combination of parts hereinafter described, and illustrated in the accompanying drawings, in which Figure 1 is a side view of the machine, the front of the frame being supported upon a truck, as required, for transportation and the saws being shown elevated or in the po sition required to permit a log or stick to be placed beneath them. Fig. 2 is a similar side view, save that the front truck is re moved and the front of the frame rests upon the ground while the sawsare lowered to working position. Fig. 3 is a front end view of the machine. Fig. 4 is a vertical crosssection of the machine, the plane of section being just in rear of the rear posts or uprights of the frame. Fig. 5 is a plan view of the machine. Figs. 6 and 7 are respectively sectional and perspective views illustrating details, which will be hereinafter described.

Duplicate saws 1, in the form of socalled wood-saws, are reciprocated in opposite directions by suitable connection with the opposite crank-arms 2 of a horizontal shaft 3, that is journaled in bearings arranged at the rear of the frame. The said frame comprises two parallel posts or uprights 4, a front post 5, which is set slightly inclined forward, two parallel bars 6, and a lower bar 7, connecting the middle and lower portions of the front and rear uprights, and bolsters 8 and 9,

supported upon the respective front and rear axles 10 and 11. The rear bolster 9 is permanently attached to the rear axle; but the front one is detachably connected by means of a removable pivot-bolt 12, (see Figs. 1 and 3,) the same being inserted in keepers applied to the bolster and axle in vertical alinement. A tongue or pole 13 is detachably connected with the front axle, and thus the front truck may be readily detached from the bolster 8 as required when the sawing-machine is to be used. The position in use is illustrated in Fig. 2, the front truck being removed and the bolster 8 resting directly upon the ground. Braces, whose arrangement it is unnecessary to describe, are applied to members of the frame, as shown. Upon the metal bars6 I arrange angular metal brackets 14 for holding a log or stick which is to be sawed. A long lever 15 is employed for holding a log or stick upon the brackets 14, asshown in Fig. 2. The front end of such lever is arranged in a keeper 16 and may be adjusted vertically therein as required to accommodate it to logs of different diameters. The rear portion of said lever is provided with a dog 17, (see Figs. 2, 4, 7,) which engages a ratchet-plate 18, affixed to one of the rear posts 4, which means serve to lock the rear end of the lever in any position required for holding a log.

I provideside supports for a log, (see Figs. 1,3, 5,) the same comprising the T-shape members 19 and inclined bars 20, to which the members 19 are adjustably secured. The bars 20 are bolted to the lower frame-bar 7 and to the middle frame-bars 6. The members 19 are provided with lengthwise slots, and bolts 21, having hand-nuts applied thereto, are adapted for vertical adjustment, so that their laterally-extended heads may be placed at the right height to support the ends of a log projecting beyond the brackets 14.

The saws 1 work in slotted guides 22, which comprise two thin and light parallel bars pivoted at their rear ends upon a horizontal rod 28, (seeFig. 6,) which is supported by a rear post 4 and a bracket 24, their front ends being arranged on vertical guides 25, attached to the front post 5. A means for adjusting the front end of the guides 22 higher or lower consists of a rope or chain 26, which passes over a pulley 27, journaled in the upper end of post 5,and a bar 28, to which said rope is connected, the rear end of the downwardly-inclined bar beingpivoted to a hand-lever 29, that is pivoted to the lower bolster 9. It is apparent that by pulling the upper end of the lever 29 backward to the position shown in Fig. 1 the sawguides 22 will be elevated, while by allowing the lever to move forward the saw-guides 22 will be lowered to the position indicated in Fig. 2, which is the working position for the saws 1. The middle frame-bars of the saws are provided with lateral pins 30,that bear upon the guides 22, so that when the latter are raised or lowered the saws necessarily follow, or,in other words,are raised and lowered with them.

As shown in Figs. 5 and 6, the parallel bars composing the saw-guides 22 may be ad justed laterally on the rod 23 and clamped at any required place thereon. The means for effecting this are an eyebolt 31, a block 32, and a nut 33. The rod 23'passes through the eye of the bolt 31, and the block 32 rests directly upon the upper edges of the guidebars 22. It is obvious that by tightening or loosening the nut the guides 22 may be clamped in place or loosened, as required for lateral adjustment.

The rope or chain 26 is not connected directly with the front ends of the saw-guides 22, but with a transverse bar 34. (See Figs. 3 and 5.) The ends of this bar are reduced and made cylindrical, and the same means are employed for clamping the'guide-bars 22 to its cylindrical ends which are employed for securing the rear ends of the guides to the rod 23 as above described. I thus provide for lateral adjustment of the sawguides 22 at each end. It is obvious, however, that such adjustment cannot be made without corresponding adjustment of the guides 25, which are attached to the front post 5.

As shown in Fig. 5, the inwardly-projecting end portions of the bars 25 are lapped and secured by bolts to the post 5, and the said end portions being provided with holes to receive the bolt it is obvious that lateral adjustment may be made at will. By such lateral adjustment of the saw-guides and the parts which support them the saws may be placed at different distances apart to accommodate them to the worl that is to say, for sawing a log or stick into different lengths, as occasion may require.

To the joint of the saw-frames with the cranks 2 of shaft 3 I attach hand-cranks 35, which serve as means for rotating the shaft, and thereby propelling the saws, as will be readily understood. It is obvious that in place of these manual means I may employ a motor of any suitable kind. Upon the shaft 3 is mounted a fly or balance wheel 36, the same having a toothed periphery to adapt it for operative connection with other machinery should occasion require. When it is desired to remove the front truck or to set the same under the front bolster 12, I employ two levers 37, (see Figs. 1 and 2,) which are pivoted to the front portion of the middle frame-bars 6 and are thus adapted to be extended forward, as indicated by dotted lines, Fig. 1, and full lines, Fig. 2, in which position they come in contact with the heads of bolts 38. By means of the levers 37 the front end of the machine-frame may be easily lifted as required toplace it upon or remove it from the front truck.

It is obvious that while two saws are pref,- erably employed the scope of the invention includes a single saw and the means for guiding, adjusting, and operating the same.

What I claim is 1. In a sawing-machine, the combination of saws, a rotatable crank-shaft with which they are connected so as to reciprocate in opposite directions, saw-guides comprislng parallel members between which the sawframes are arranged, a rear support on which said members are pivoted and whereon they are laterally adjustable, means for clampingsuch rear portions on said support, a horizontal bar upon which the front ends of the saw-guides are supported, means for clamping the same thereon after lateral adjustment, and means for raising and lowering the front ends of the saw-guides, substantially as described.

2. In a sawing-machine, the combination, with a frame, of saws adapted to reciprocate in opposite directions, a crank shaft with which they are suitably connected, sawguides each composed of two parallel mem bers between which the saws reciprocate, means by which the saw-guides are lvotally supported and adapted for latera adjustment at their rear ends, front guides attached to the frame and having vertical portions whereon the saw-guides are adapted to slide vertically, the said front guides being laterally adjustable, substantially as described.

3. In a sawing-machine, the combination of saws and a crank-shaft with which they are connected so as to reciprocate in opposite directions, parallel saw-guides each compris ing parallel bars, rear supports upon which the saw-guides are pivoted and adapted for lateral adjustment, means for clamping the guides on such supports, front guides upon which the saw-guides are adapted to slide vertically, the said front guides being laterally adjustable, a bar connecting the front ends of the saw-guides, means for clamping the latter adj ustably thereto, and means for raising and lowering the front bar, substantially as described.

BENJAMIN E. HARRELD Witnesses:

N. U. LUELLEN, N. KITTLE.

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