US1712270A

US1712270A - Drag-saw

Info

Publication number: US1712270A
Application number: US134097A
Authority: US
Inventors: Nathaniel H Hawk
Original assignee: Individual
Current assignee: Individual
Priority date: 1926-09-07
Filing date: 1926-09-07
Publication date: 1929-05-07
Anticipated expiration: 1946-05-07

Description

'N. H. HAWK May 7, 1929.

DRAG SAW Filed Sept. 7, 1926 Patented May 7, 1929.

NATHANIEL H. HAW'K, OF EA'NDY, OREGON.

DRAG SAW.

Application filed September 7, 1926.- Serial No. reaper.

This invention relates generally to drag saws, and particularly to a portable type of saw cruninonly employed for cutting fallen logs into shorter lengths,

The main object of this invention is to construct an exceedingly light, rigid and inexpensive frame for drag saws which will be easy to handle in moving from one cut on a log to the next cut in the san'le log, or when. transporting the entire saw along the ground to different locations.

The second object is to so construct the saw frame that it will be a simple matter to positively hold the frame against the log without any tendency for the vibration of the saw to loosen the saw frame which would otherwise cause the operator to re-set the frame, with a very great chance of his not restoring same to the original setting, there by imposing unnecessary strains upon the sawand ultimately reducing the amount of labor which could be performed by a saw in a given amount of time.

The third object is to suspend the saw frame on three points, one of which is a ground-engaging wheel; the second of which is a serrated edge which will bite into the leg when sawing, or is held out by a wheel when moving along the log, requiring only the lifting of the third point of suspension to enable the operator to move the saw longitudinally with relation to the lo The fourth object is to provide a special form of clamping means which will automatically find its correct position, regardless of the size of the log or the manner in which the frame is placed upon the log.

These, and other objects, will become more apparent from the specification following as illustrated in the accompanying drawing, in which:

Figure 1 is a side elevation of the device showing same clamped to a log. Figure 2 is a plan of the device in position for transporting along the grmind after the fashion of a wheel barrow. Figure 3 is a transverse section through the device taken. along the line 8-3 in Figure 1 showing the clamping mechanism. Figure 4L is a fragmentary view of the ground-engaging wheel rim showing the latch for preventing the rotation of the wheel dining sawing operations.

Similar numbers of reference refer to the same parts throughout the views.

Referring in detail to the drawing, the

. 24 to increase device consistsot an A-shaped frame 111e1nber whose sides 10 meet at the point 11 on which is mounted a circular guide 12 within which is rotatably mounted a ringlI-l across whose diameter is pivotally mounted ashaft 14; for the ground-engagin wheel 15. it pin 16 is provided which passes through the circular guide 12 and the ring 13 to hold it in one or the other of two positions, namely those shown in Figures 1 and 2.

The 'wheel. has mounted on the side of its rim a spring latch 17 whose plunger 18 can. project into the ring 13, or can be with drawn and moved to one side by swinging the latch 17 on the pivot 19, thereby freeing the wheel 15.

Cross braces

20, 21 and 22 are also provided, as well. as the longitudinal bar 23 between the braces 21 and 22. Over the member 28 is lower end 25 is enlarged and engages the sides of the member 23 and serves to hold the lever in an upright position at all times.

A roller 26 is mounted between the sides of the member 24 and engages the upper edge of the member 23. A clevis 27 is attached to the member 24: by means of the pin 28 slightly above the center of the roller 26. A chain 29 connects the clevis 27 to the dog 30 whose point 31 is so shaped as to cause it to bite into the log 32.

Connection between the chain 29 and the cleVis 27 is preferably by means of a hook so that a suitable length may be secured for the chain 29 without much effort. If desired, additional holes 33 may be provided in the lever the movement or pull on the chain 29 when the lever 24 is operated.

Handles 3 1- are provided on the ends of the frame sides 10 to facilitate the wheeling of the drag saw. Each side 10 is provided on its under side, at the point of engagement with the log 32, with a plurality of teeth 35. One member 10 is provided with an eccentrically mounted wheel 36 whose shaft 37 journals in the brackets 38. The shaft 37 is rocked by means of the lever 39, its function being to hold the wheel 86 in either a downward or upward position, the :l'ormer holding one set of teeth away from the log and the latter permitting the teeth 35 to engage the log.

The operation of the saw is as follows: When transporting same to the log the shaft 14 is clamped in the position shown in Figure 2 by means of the pin 16, and the operator placed the forked lever 24: whose der side 01 the log 32 and the lever 24 is raised to a point just past the vertical position, the chain 29 having first been deprived of'its slack by means of proper adjustment at the clevis 27. v

In order to limit the distance which the lever 2ft rocks past its center it is preferable to provide a stop 40 on the rear side of the lever 24. If it is desired to operate'the lever 24 in the opposite direction from that shown in the drawing it is only necessary to lift same up bodily out of engagement with the member 23 and turn same 180 degrees and restore to its position on the bar 23, which would merely place the stop 40 on the opposite side, or toward the wheel 15.

When the cut has been finished and it is desired to move the'saw to the next cut, the operator has only to raise his saw out of the v cut, disengage the dog 80 by drawing down the lever 24 and swing the lever39 so that the wheel 36 will raise its side of the frame 10 out ofthe log 32. He then disengages the latch 17 as described, and manually raises the side of the frame opposite the wheel 36 and finds that the entire saw will easily roll along the log to the next cut, after which the wheel 36 is again raised, the wheel 15 locked, the dog 30 driven home and the lever 24: returned to its upright position when he is ready for the next cut.

I claim:

1. A drag saw comprising an A-shaped frame having its diverging ends serrated on their under sides and having a pair of cross ties between said serrated ends joined at their middle by a longitudinal bar; a clamping means for holding said frame against the log consisting of a forked lever straddling said bar and adapted to slide and rock thereon; a clevis attached to said lever above its rocking center; a hook attached to said clevis adapted to engage the under side of a log when said frame is placed thereon; and a stop on said lever permitting it to lock over its center when said hook is pulled upwardly.

2. A drag saw frame consisting of? an A- shaped member normally adapted to occupy an inclined plane with its pointed end nearest the ground, a ground-engaging wheel for supporting said pointed end, a rotatable support for said wheel consisting of a ring in which said wheel is mounted, a normally horizontal circular frame in which said ring is rotatably mounted, means for locking said ring and circular frame together, and means for locking said wheel and ring together.

NATHANIEL H. HAWK.