US280497A - Handsaw - Google Patents

Description

(No Model.)

T. U. MEKEEL.

HANDSAW,

' Patented July 3, 1883.

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THOMAS U. MEKEEL, OF GOLD SPRING, NEXV YORK.

HAN DSAW.

SPECIFICATION forming part of Letters Patent No. 280,497, dated July 3, 1883. Application filed October 19, 1882- (No model.)

To aZZ whom it may concern Be it known that I, THOMAS U. MEKEEL, of Cold Spring, in the county of Putnam and State of New York, have invented a new and Improved Square Attachment for Saw-Blades, of which the following is a full, clear, and exact description.

Theobject of my invention is to provide a self-adjusting square and bevel attachment for saw-blades, which attachment is so constructed that it can be set at any desired a11- gle to the straight edge of the saw-blade.

Reference is to be had to the accompanying drawings, forming part of this specification, in which similar letters of reference indicate corresponding parts in all the figures.

Figure 1 is a longitudinal elevation of a saw having my improved square attachment se cured 011 the blade, the edge of the attachment being at right angles to the straight edge of the saw-blade. Fig. 2 is a like view, showing the other side of the saw, the attachment being at an obtuse angle to the straight edge of the saw blade. Fig. 3 is a cross -sectional view of the same on the line 00 x, Fig. 1.

Two rectangular pieces, A, resting against the opposite sides of the saw-blade B and united at the ends of the short shanks, are held on the blade by a screw-bolt, C, and nut D at the upper end of the said blade, in such a manner that the said angle-pieces can turn on the said bolt 0 as a pivot. The lower edges of the handle E are beveled at each side of the blade at an angle of forty-five degrees, so that when the long shanks of the angle-pieces A rest against the said edges of the handle they (the said angle-pieces) will be at an angle of forty-five degrees to the straight edge of the saw-blade. A semi-quadrant scale, F, is provided on one side of the saw-blade to facilitate the adjustment of the angle-pieces. A spring, G, or two springs-one on each side of the bladeif desired, press the angle-pieces from the beveled edges of the handle. The saw-blade is provided with a longitudinal slot, H, near the angles of the pieces A, and through the said slot a screw, J, passes, which is provided with a nut, K, which has a milled edge, or is provided with wings.

The square attachment is used and adjusted as follows: WVhen the bolt J is at the upper end of the slot H and the inner edges of the pieces A rest against the said bolt, the outer edges of the pieces A will be at right angles to the straight edge of the saw-blade, and if an outer edge of a piece, A, is placed against the edge of a board, the straight edge of the blade will be at right angles to the edge of the board, and a line can be drawn along the edge of the saw-blade. If, while sawing, the angle-pieces are displaced, the spring G will press them back in place; or, if the spring is not provided and the edge of the long shank of an angle-piece is placed against the edge of the board, the lower end of the saw can be moved on an arc toward the angles of the angle-pieces until the inner edges of the anglepieces strike against the bolt J. Then the outer edges of the angle-pieces will be at right angles to the straight edge of the saw. If the bolt J is moved down the slot H a certain distance, and then locked in position by means of the nut K, the anglepiece will be so adjusted that when the inner edges of the anglepieces rest against the bolt J the outer edges of the angle-pieces form an acute angle with the straight edge of the saw-blade. The angle-pieces can thus be adjusted for any desired angle, and can also be brought back into position at the desired inclination to the straight edge by resting the outer edge of one of the angle pieces against the edge of the board and moving the lower end of the saw toward the angles of the pieces A. As the pieces A are rightangled, they can be used to give the straight edge two different angles to the edge of the board. When the said angle-pieces are adjusted at an angle to the said straight edge, of which one angle is obtuse and the other acute, the sum of the two angles being equal to two right angles, one angle is formed by a long shank of a piece, A, and the straight edge, and the other by a short shank and the straight edge. 7

The anglepieces can easily be removed from one saw-blade and attached to another. I have shown and described two angle-pieces; but, if desired, one only can be used.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. The combination, with a saw-blade, B,

having the slot H, the bolt and nut J K, and the edge-beveled handle E, of the rectangular pieces A A, pivoted together by a bolt passing through their short shanks, and provided 5 with long shanks adapted to rest against the handle-bevels, as and for the purpose specified.

2. The combination with the handle and the pieces A A, of one or more springs, G, arranged to press said pieces from the beveled IO edges of the handle, as described.

The combination, with the saw-blade B, having a slot, H, of an angle-piece, A, the screw-bolt J, passing through the said slot and of the nut K, substantially as herein shown and described, and for the purpose set forth. 15

THOMAS U. MEKEEL.

XVitnesses:

THos. W. JAYooX, JAMES M. SMITH.

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