US1349427A - Adjustable handsaw - Google Patents

Description

G. McKENNEY.

ADJUSTABLE HANDSAW. APPLiCATION FILED NOV. 3. 1919.

1,349,421 Patented Aug. 10,1920.

3 vwantoa UNITED STATES PATENT OFFICE.

GAIKEN MGKENNEY, 0F BANGOR, MAINE.

ADJUSTABLE HA-NDSAW.

Application filed-November 3, 1919. Serial No. 335,297.

To all whom it may concern Be it known that I, GALEJ MoKnNNnY, a citizen of the United States, residing at Bangor, in the county of Penobscot, State of Maine, have invented certain new and useful Improvements in Adjustable I-Iandsaws, of which the following is a description, reference being had to the accompanying drawing and to the figures of reference marked thereon.

This invention relates to saws and more particularly to hand saws adapted to receive blades of varying lengths.

The main object of this invention is to providea hand saw having an adjustment to accommodate saw blades of varying lengths and provided with additional means for varying the tension of the saw blade.

A further object of this invention relates to the improved means for adjusting the frame to receive the different lengths of blades.

A still further object of this invention resides in the clamping connection between the handle and the frame for varying the tension of the blades.

These and other objects will in part be obvious and will in part be hereinafter more fully disclosed.

In the drawings, which show by way of illustration one embodiment of the invention:-

Figure 1 is a side elevation of my improved saw,

Fig. 2 is across section of the frame adjusting means for accommodating different lengths of blades,

Fig. 3 is a similar sectional view of the clamp connecting the frame and the handle,

Fig. i is a sectional end view thereof,

Fig. 5 is a modification of the construction set forth in Fig. 2, and

6 is a sectional view taken from the construction shown in Fig. 5.

In general the invention is shown in connection with a buck saw and comprises a curved tubular frame provided with an extensible adjustment between the ends thereof, preferably in the form of telescoping members at one end having interlocking means for holding these members in various adjusted positions. To one end of the frame is pivoted the handle which receives between it and the other end of the curved frame, the saw blade, while between the opposite end of the handle and the frame is arranged an adjustable member for tensioning the saw blade.

Referring more particularly to the drawings, the invention comprises a frame consisting of a curved rod 1 which in the present instance is shown as tubular in form. Telescoping the outer end of this rod or inner sleeve is a tubular outer sleeve 2 provided with a series of adjusting holes 3 adapted to receive an interlocking member in the form of a lug 4: secured in any suitable manner to the free end of a leaf spring 5 attached preferably to the inner side of the tube 1. Secured integrally with or fitting within the end of the tubular sleeve 2 is a casting or inner section 6 bifurcated at its outer end and pivotally connected to an intermediate portion of a saw handle 7 which may be of wood or any desired material. Between the other end of the frame and one extremity of the handle is detachably connected a saw blade 8.

To provide a means for tensioning the saw blade, the other or outer end of the handle is adapted to-receive the hooked end of a rod 9 adjustably connected to a similar rod 10 by means of the turn-buckle 11. The end of rod 10 is provided with a hook connection to the improved clamping device shown in Figs. 3 and i, consisting of a clamping member 12 adapted to surround and slidably engage the tubular frame 1 and provided with two upstanding ears 13 perforated to receive a bolt 14 provided with the usual wing 111 .015 for tightening the same so that said member may be locked to the frame in any set position therealong. Pivotally mounted intermediate its ends on this bolt between the upstanding ears13 is arranged a locking lever 16 perforated at its outer end to receive the hooked end of the rod 10. The inner end of the lever is backed off as at 17 so that when pressure on the rod 10 is released, the lever may be swung counterclockwise to release the clamp 12.

In -Figs. 5 and 6 I have shown a modification of the telescopic interlock between the tubular members 1 and 2. In this arrangement, instead of using the inner spring leaf locking lug, the outer sleeve 2 is provided with a longitudinal slot 18 having lateral branch slots 19 adapted to receive a locking lug 20, riveted or otherwise secured through the outer side of the inner sleeve 1.

In the use of this improved construction, the frame 1 may be adjusted so that longer or shorter blades can be inserted between the ends of the handle and the frame 1, after which the clamp 12 is slid along the frame 1 to the approximate adjustment for securing the required tension on the blade 8. The turn buckle 11 is then adjusted until an exact and nice tension of the blade is secured; 'It will be clearly understood that with this combined adjustment, the saw is adapted to receive not only different lengths of blades, but each blade can be properly tensioned as the circumstances demand. It is further obvious that by the use of these combined adjustments the correct angularity of the handle to the blade may be maintained when a longer or shorter blade is inserted.

It is obvious that minor changes in the details of construction and the arrangement of parts may be made without departing from the spirit of the invention as set forth inthe appended claims.

Having thus described the invention, what I claim as new and desire to secure by Letters-Patent is 1. A handsaw comprising a frame, a handle permanently pivoted to said frame, a saw blade connected at one end to said frame and at its other end to said handle, means disposed between the ends of the frame whereby said frame may be adjusted as to length and set for several predetermined fixed lengths, an adjustable member carried by said frame, and a rod connected to said adjustable member and to the upper end of the handle, said rod having between its ends means whereby it may be adjusted for varying its length.

2. A handsaw comprising a frame, a handle permanently pivoted thereto, a saw blade detachably connected at one end to said frame and at its other end to said handle, means disposed between the ends of the frame whereby said frame may be adjusted as to length and set for several predetermined fixed lengths, a slidable member having means for frictionally gripping the frame whereby said slidable member may be held in fixed position on the frame, and a rod connected at one end to said slidable member and at its other end to the upper end of the handle, said rod having a turn buckle disposed between its ends whereby the length of the rod may be varied for putting the saw blade under tension.

3. A hand saw comprising a frame including an extensible portion, a handle pivoted thereto, a blade connected to said frame and handle, a member slidable along said frame, and an adjustable connection between said slidable member and said handle, the tightening of which clamps said member on said frame, and further means for locking said member irrespective of said tightening.

l. A hand saw comprising a frame includ ing an extensible portion, a handle pivoted to said frame, a blade connected to said frame and handle, a slidable member engaging said frame, a lever pivoted intermediate its ends to said member, the inner end of said lever having a backed-off end engag' ing said frame, and an adjustable connection between said lever and said handle, and means for locking said member to said frame.

5. A hand saw comprising an extensible frame including a sleeve provided with locking notches, an inner section, a locking pin engaging therewith for movement into and out of said notches, a handle pivoted to said sleeve, a blade connected to said frame and handle, a slidable member engaging and locking on said frame, and a turnbuckle connecting said member to said handle.

In testimony whereof I affix my signature.

GALEN MGKENNEY.

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