US669555A - Cutter. - Google Patents

Description

No. 669,555. Patented Mar. 12, 1901.

V T. M. SIMPSON.

C U T T E R.

(Application filed Apr. 18, 1899.)

(No Model.)

:IIIjIIIIIIflIC ZL 16 WW THOMAS M. SIMPSON, OF STEUBENVILLE, OHIO.

CUTTER.

SPECIFICATION forming part of Letters Patent No. 669,555, dated March 12, 1901.

4 Application filed April 13, 1899. serial No. 712,958. (No model.)

To all whmn it may concern.-

Be it known that I, THOMAS M. SIMPSON, a citizen of the United States, residing in Steubenville, county of Jeiferson, State of Ohio, have invented certain new and useful I1nprovements in Machines for Cutting Oval Openings in Mat-Board or other Like Material, of which the following is a specification.

I attain these objects by the mechanism shown in the accompanying drawings, in which Figure 1 is a plan view of the mat-cutter. Fig. 2 is an end view of the same. Fig. 3 is r a front view of the carrier and angle-plate with the cutter-holder. Fig. 3 is a side view of the same Fig. 4 is a front view of angleplate and attachable holder. Fig. r is a side view of such plate, showing transverse angle of holder to that of angle-plate 0. Fig. 5 is an end View of trammel-blocks. Fig. 5 is a side view of the same.

A is a disk having its edge undercut to reduce the diameter of the same. The upper face of the disk has formed in it two dovetailed diametrical grooves, such grooves cross ing at right angles to each other. Secured to slide in these grooves (one in each groove) are the dovetailed trammel-blocks O O each block fitting in the groove and having its ends undercut to correspond to the undercut sides of the disk. Each block is also provided with a pivot-pin projecting from the center of the block, the pivot-pins being screw-threaded at their ends and provided with thumb-nuts D to engage and hold the radius-bar on such pivot-pins.

F is a radius-bar and is provided at the left i of its center with the holes G to fit over the which the carrier may be clamped to the bar at any desired point.

O is an angle-plate pivoted to the face of the carrier by the pivot-screw I and provided with the set-screw K as a means to secure it in any adjusted position. The angle-plate bears the knife-holder M. The knife L is held in the holder by the hinged clamp P, with which the set-screw N, carried by the holder, engages. This clampis provided with an eye or hook at its upper end, in which the bar 1) may be inserted as a lever to raise or lower the clamp and knife.

If desired, the clamp P may be dispensed with and the knife or cutter used in the attachable holder engaged and clamped, as shown in Figs. 3, 3, 1L, and P.

The disk is secured in place to hold down the material to be cut by the screws E, which pass through the disk and engage the table or support beneath. Instead of the screws E I may use a telescoping rod, (shown in dotted lines, Figs. 1 and 2,) which passes through an aperture in the disk and is secured to the support by screws passing through eyes formed in the ends of the rod. To cut a circular opening, the bar F is disengaged from one pivot-pin and the slideblock bearing the other pivot-pin is secured to the center of the disk.

I claim 1. The combination of the undercut disk having diametrical dovetailed grooves cut in its face, such grooves crossing at right angles to each other, with dovetailed trammelblocks carrying pivot-pins and fitted to slide in the grooves of the disk and having their ends undercut to correspond to the undercut sides of the disk, a radius-bar having a series of holes to receive the pivot-pins of the blocks, a carrier sliding on such bar and provided with means to engage the same, an angleplate pivoted to such carrier and provided with a knife or cutter holder, and means whereby said angle-plate may be adjusted and clamped to said carrier.

2. The combination of the undercut disk having diametrical dovetailed grooves cut in its face, such grooves crossing at right angles to each other, with dovetailed trammelwhereby said angle-plate may be adjusted 10 and clamped to said carrier, a knife or cutter in such holder, and means to raise or lower such knife or cutter.

THOMAS M. SIMPSON.

Witnesses:

HARRY G. SIMPSON, W. MOD. MILLER.

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