US321484A - Joseph a - Google Patents

Description

(-No Model.) 2 She ets-Sheet 1. J. A. GOMER.

- SAW GUARD.

Patented July R1885.

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J. A. 00mm.

SAW GUARD.

No. 321,484. Patented July 7, 1885.

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justed to a saw of small diameter.

I Unites States tharnnr JOSEPH A. COMER, OF INDIANAPOLIS, INDIANA, ASSIGNOR TO THE NATIONAL SAIV GUARD COMPANY, OF SAME PLACE.

SAW-GUARD.

forming part of Letters Patent No. ($21,48 dated July 7, 1885.

Application filed February 19, 1885. (No model.)

To all whom it may concern.-

Be it known that I, JOSEPH A. COMER, a citizen of the United States, residing at Indianapolis, in the county of Marion and State of Indiana, have invented a new and useful Improved SawGuard, of which the following is a specification.

My invention relates to an improved sawguard for circular saws. The objects of my improvement are to provide a guard which shall be substantially concentric with the periphery of the saw, covering the edge only of the saw, and to make the guard automatically adjustable to diiierent thicknesses of lumber in a line substantially concentric with the periphery of the saw, as hereinafter explained.

The accompanying drawings illustrate my invention.

Figure l. is a side elevation of my guard ad- Fig. 2 is a similar view of the guard adjusted to asaw of larger diameter. Fig. 3 is a plan. Fig. t is an enlarged section at a a, Fig. 3. Fig. 5 represents amodification of the means for holding the guard-arm in position.

A is a thin vertical standard, adapted to be secured to the saw-table by means oi'a bracket, Z), secured to the lower end of said standard. That edge of standard A next the saw is curved to correspond substantially with the outline of the largest saw with which the guard is designed to be used.

b is a curved arm, having astraight portion, 0, which is split so as to embrace both sides of the standard A, to which the arm is secured by means of a thumb-screw, d, which passes through said arm and through either one of a series of holes, 6, in the standard, or through the slot to, Fig. 5, thus clamping the arm strongly to the standard.

The arrangement of holes 6 and slot :0 is such that as the arm is moved from the upper to the lower end of the standard it is also drawn toward the standard, the purpose being to cause the combined curves of the arm and the standard to form a curve substantially corresponding with the outline of the peripheries of saws of different diameters. Arm b is of such length as to leave the front edge of the saw exposed.

F is a curved guard, fitting the back of arm Z), and adapted to slide longitudinally thereon, and held in place on said arm by means of a longitudinal dovetailed groove, 5 which embraces a-correspondingly-shaped rib, 72-, formed on the back of the arm.

For the purpose of limiting the longitudinal movement of guard F, a lug, Z, projects up ward from the back of said guard, and a rod, 2', carrying a movable stop, j, is secured at one end to a lug, is, formed integral with arm A. Stopj is arranged to intercept lug Z in its outward movement, and is adj ustably secured on the rod '2' by a set-screw, in.

The outer end of guard F is turned upward to form the inclined face a, for the purpose of causing the lumber as it approaches the saw to automatically adjust the guard to the thickness of the lumber.

For the purpose of preventing the sawdust from flying out sidewise from the saw, that side of arm A and guard F next the saw is made concave or inclined, as shown in Fig. 4:.

For the purpose of providing an additional security against arm I) and the guard thereon being accidentally forced down upon the sawteeth, a pin, p, is inserted in one of a series of holes, r, in standard A, the lower edge of the pin resting against the upper edge of the arm, back of the clampingscrew.

WV hen a closer adjustment than can be obtained with the series of holes 6 is desired, I use the slot at, (shown in Fig. 5,) the pin 1) in such case being passed through the arm I), and back of the clamping screw, the pin resting against the inside of the slot.

The operation of my device is as follows: Standard A is secured to the saw table with its front curved edge, as shown, near the back of the saw. Arm 1) is then secured to the standard, the lower straight edge of part a being set a little higher from the table than the thickness of the thickest stock designed to be sawed, and the forward end of the arm standing just clear of the saw. Stop is then adjusted and secured on rod 2', so as to allow the forward end of guard F to approach as near the saw-table as the thickness of the thinnest material to be sawed. As the material to be sawed is pushed toward the edge of the saw, 100

if thin it passes freely under the forward end of the guard; but if the material is thicker it engages the inclined face n, and the guard is pushed upward in a curved path practically concentric with the saw. The distance between the guard and the saw is not changed by such upward movement. When the material has passed the guard, it again falls to the lowest point.

In saw-guards as heretofore constructed the guard or hood has projected downward on e .ch side of the saw, thus coming in contact with the teeth, if pushed slightly to one side, and also hiding the saw. The guard has also been so connected with the standard that in rising to admit thicker lumber it has moved Said guards have farther away from the saw.

JOSEPH A. COMER.

Witnesses:

H. 1?. H001), V. M. H001).

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