US666275A - Machine for sawing segments. - Google Patents

Description

No. 666,275. v Patented linux22, I90l.

T. n. KEAsgY. MACHINE FOB SAWING SEGMENTS.

(Application filed Aug. 25, 1899.)

(No Model.)

WITNESSES UNTTnn STATES PATENT Trice.

reason D. KEASEY, or TOLEDO, OHIO.

MACHINE FOR SAWING SEGMENTS.

SPEGIFACATION formingpart Letters Patent No. 666,275, dated January 22, 1901.

Application filed August 25, 1899. berial'No. 728,471. (No model.)

To (01% who/it it may concern:

Be it known that I, THERON D. KEASEY, a citizen of the United States,residing at Toledo, Lucas county, Ohio, have invented a certain new and useful dachine forSawing Segments, of which the following is a specification.

In sawing the segments of which wood pulleys are composed a familiar difficulty e11- countered with the sawing devices heretofore in use is the great waste of lumber which takes place, due to the fact that the curved segments or sectors are cut or sawed from rectangular blocks or boards.

My invention relates to a sawing-machine designed especially for the sawing of woodpulley segments; and one object is to overcome the difficulty above indicated and to render practical a method for sawing rectangular boards into curved pieces without loss or waste.

A further object of my invention is to provide means by which my machine may be adjusted to cut in the line of a circle of any desired radius.

A further object of my invention is to provide my machine with means for controlling the radial width of the segments to be cut.

I attain these objects by means of the method, mechanism, and arrangement of parts hereinafter described, and shown and illustrated in the accompanying drawings, made part hereof, in which Figure l is a perspective view of my device, and Fig. 2 a top plan view of a series of rectangular blocks or portions having marked thereon a diagram of the cuts to be made by the saw of my machine.

Like letters of reference indicate like parts throughout the drawings.

In the drawings, a is a band-saw of ordinary construction passing over two band-wheels b and actuated in the usual manner.

0 is a saw-table through a slot (1 in which passes the band-saw.

eis asupplemental table or saw-board which lies fiat upon the top of the table 0.

In the top of the table 0 is a series of holes f, and through the table or board 6 is a like series of holes 9.

h is a pin adapted to pass through either of the holes 9 into either of the holes fand forms an adjustable pivot, upon which the supplemental table 6 may be swung horizontally.

Across the top of the table 6 and in rectangular relation therewith is a guide-bar orstop t', which by means of parallel slots and setscrews Z is adjusted along the table 6 toward and away from the saw.

Secured to the upper face of the supplemental table 6 is a curved arm m, its outer extremity being disposed at substantially a rightangle to the guide-bar i. Through the outer extremity of the curved bar is a threaded aperture through which passes a set or gage screw it, the axis of the screw being radially disposed relatively to the pivot h. A handle 0 projects upwardly from the arm m and furnishes a convenient means by which the operator may swing the table e to and fro upon its pivot.

The operation of my device is as follows: It should be understood that the portions which are to be sawed into segments are first cut into lengths corresponding with the chord of the segment to be produced and that the segments are cut substantially lengthwise of the grain of the wood. The set-screw n is set with its inner extremity at the distance from the saw corresponding with the width of the segments to be produced. The guidebar or stop 2' is moved along the table c to the proper point and is rigidly secured in place by means of set-screws Z. The tableeis swung on its pivot away from the saw, (toward the observer in Fig. 1.) The piece of wood prepared as above stated is laid upon the table with its edget'. 6., the ends of the grainresting against the stop or guide 2' and with its end projecting against the gage-screw n. The table 6 is now swung on the pivot it toward the saw and a cut is made through the board in the arc of a circle of which the pivot h is the center. The severed piece is removed, the table is swung back, the board is again moved up against the gage-screw, the table is again swung, and a segment is removed from the end of the board. This operation is repeated until the prepared piece of board is used up; but just before the final out another block or board is placed with its margin 19 against the margin q of the preceding block or board, the grain of the pieces running parallel with each other. The operator presses the two pieces close together and toward the two guides 01' stops 1' n. The work now proceeds as if the blocks or boards to be sawed were a continuous strip, the cuts being made regardless of the crack formed by the straight meeting edges of the pieces. This operation maybe repeated indefinitely.

The advantage of sawing segments with m y machine is the simplicity of the device, its cheapness, and the economy of lumber. The shaded portions of the board to be sawed (illustrated in Fig. 2) represent the parts of the board which under the old method of sawing segments are wasted and lost. In the method here described it is obvious that these portions may now be saved and utilized at the trifling expense of gluing the margins of the pieces of the mutilated segments together, the cost of which,as compared with the amount of lumber saved, is but a trifle.

The width of the segments is fixed by the position of the gage-screw, and the table may be accommodated to any Width of board or block by means of the stop or bar 1', while the radius of the circle upon which the segment is to be cut is governed by the adjustment of the table 6 in relation to the pin it, which is permitted by the arrangement of the two series of holesfg.

Having described my invention, what I claim, and desire to secure by Letters Patent,

A machine for sawing segments comprising a saw, a table, a supplemental table movable on the first-mentioned table, pivotal connections between said two tables, means for adjusting the point of pivotal connection between said two tables, two stops upon said last-mentioned table, and means for adjusting said two stops at a right angle to each other.

WILBER A. OWEN, L. E. BROWN.

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