US797428A - Handsaw. - Google Patents

Description

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HANDSAW APPLICATION FILED SEPT. 16.1904.

RANDOLPH W. HAVVKINS, OF ST. LOUIS, MISSOURI.

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Specification of Letters Patent.

Patented Aug. 15, 1905.

Application filed September 1B, 1904. Serial No. 224,695.

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Be it known that I, RANDOLPH W. HAwKINs, a citizen of the United States, residing at St. Louis, State of Missouri, have invented certain new and useful improvements in Handsaws, of which the following is a full, clear, and exact description. reference being had to the accompanying' drawings, forming a part hereof.

My invention has relation to improvements in handsaws; and it consists in the novel construction and arrangement of parts more fully set forth in the specification and pointed out in the claims.

In the drawings, Figure 1 is a perspective showing the application of my invention to a log. Fig. 2 is a side elevation of the frame in which the operating parts are mounted. 3 is a top plan of Fig. 2, and Fig. 4 is a transverse section on line 11 1 of Fig. 3.

The object of my invention is to mount a circular saw in a frame having provision for automatically feeding the saw into the log being cut, the device being specially applicable in cutting logs intended for cord-wood. In detail the invention may be described as follows:

Referring to the drawings, E represents a forked rigid frame whose members are provided with teeth or serrations 1 1 for firmly gripping or seizing the surface of the log L to be cut, the base of 'the frame being provided with or formed into a saddle or rest 2,

against which the operator may brace himself during the sawing operation. Mounted upon a transverse operating-shaft 3, which is free to reciprocate in the opposite longitudinal ways or slots l 1, formed in the fork members, is a sprocket-disk 5, from which passes a chain 6 over a sprocket-pinion 7 on a transverse shaft 8, operating in the slots 9 9 of theA fork members. Keyed or otherwise secured to the shaft 8 and confined between the fork members is the circular-saw blade 10. Both shafts and 8 have bearings in plates 11 11, resting against the inner faces of the fork members and spaced by the washers 3 8, respectively.

Disposed along the outer face of either (or both) members of the forked frame F are a series of rack bars or surfaces 12 13 111, arranged in step formation or along different planes from the surface of the frame, the shaft 3 being` provided with interchangeable pinions 15 16 17, adapted to engage with the respective rack-surfaces, the largest pinion engaging the rack 12, the pinion 16 engaging the rack 13 and pinion 17 engaging the rack 14. lach end of the shaft 3 is squared and receives the socket of an operating-handle H, as shown.

The operation is as follows: Upon turning' the shaft 3 in the direction indicated by the arrow in Fig. 2 the saw will revolve in the same direction; but at the same time the pinion 15 will travel along the rack 12, and as the saw turns it will be automatically fed into the log being' cut. (See dotted position of parts in Fig. 2.) As the teeth of the saw wear away and it becomes necessary to reduce the feed by reason of the consefluently-reduced diameter of the blade, the operator removes the pinion 15 and in turn attaches pinions 16 17,' which by reason of their successively-reduced diameters will successively feed the saw into the wood at a slower rate. Of course to attach any pinion the handle H is first removed, when one pinion can be slipped off the shaft and the next pinion substituted.

This device has the advantage over the ordinary crosscut-saw in that the feed is more uniform and positive and can be conveniently operated by one person. The ratio between the diameters of the sprocket-disk 5 and the pinion 7 is substantially three to one, so that one revolution of the disk will impart three revolutions to the saw. 1 may, of course, depart, in a measure, from the details here shown without in any wise affecting the na ture or spirit of my invention. Y

Having described my invention, what l claim is- 1. in a saw, a forked frame having terminals for engaging the surface of the stock to be sawed, a circular saw mounted therein, a shaft for the saw having a movement longi tudinally along the frame, a main operatingshaft, slotted ways formed in the `frame for the reciprocation of said shaft, intermediate gear connections between said main operating-shaft and saw-shaft, a rack on the frame, and a pinion on the main operating-shaft engaging the teeth of the rack, substantially as set forth.

2. ln a saw, a suitable forked frame, a circular saw mounted therein, a shaft for the saw, the frame having longitudinal slots for the reception of the ends of the shaft, a sprocket-pinion on the saw-shaft, a main operating-shaft, the frame having slots through which said shaft passes, a sprocltetdislc on the main shaft, a chain connecting the disk with the pinion, one or more racks on the With slots for the reception of the main shaft and the shaft of the saw, plates serving as bearings for the shafts.l and operating-handles for the main shaft, substantially as set forth.

In testimony whereof I aix my signature in i presence of two Witnesses.

RANDOLPH W. HAWKINS. Witnesses:

EMIL STAREK, G. L. BELFRY.

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