US484874A - David h - Google Patents

Description

(No Model.)

D. H. BRENNER. MITER CUTTING MACHINE. No. 484,874. Patented Oct. 25, 1892.

JawvkZIJren/uer M J m WM j UNITED STATES PATENT OFFICE.

DAv1D H. BRENNER, OF GRAND RAPIDS, MICHIGAN, ASSIGNOR TO JAMES T. PHILLIPS, OF SAME PLACE.

MlTER-CUTTING MACHINE.

SPECIFICATION forming part of Letters Patent No. 484,874, dated October 25, 1892. Application filed May 22, 1891- Serial No. 393,793. (No model.)

To alt whom it may concern:

Be it known that I, DAVID H. BRENNER, a citizen of the United States, residing at the city of Grand Rapids, in the county of Kent and State of Michigan, have invented certain new and useful Improvements in Miter-Outting Machines, of which the following is a specification.

This invention relates to a new and improved miter-cutting machine; and the invention consists in the use of aknife attached to a lever, said knife running in close proximity to the bed of the machine and to the posts on either side of the same or to one of them, so as to make a shear out between the bed, the post, and the knife.

It also relates to a knife attached to a lever or other suitable means for operating the knife, having a slot and offsets whereby the knife and lever may be moved so as to be nearer one end of the bed than the other.

It also consists in a lower extension from the bed, which forms a lever-support, so that the lever may be pivoted ata point below the bed.

The objects of this invention are, first, to form a shear cut by means of a stationary post and a bed arranged so that the portion of the post next to the travel of the knife and the portion of the bed next to the travel of the knife are in the same plane; second, to dispense with gearing, cog-wheels, &c., and still allow the operator to bring the knife in contact with the stock to beoperated upon in the same manner as has heretofore been done by means of gears; third, to dispense with a movable gage which extends up to or near to the top of the knife and to use the stationary post as a support for the stock to receive the pressure caused by the thrust of the knife, and to use a comparatively-short gage, moving in a circular slot, and also in other details of construction, hereinafter described and particularly pointed out. These objects are accomplished by means of the mechanism illustrated in the accompanying drawings, in Which- Figure 1 shows a rear elevation of my invention, showing the part of the machine supporting the lever and cutting-knife. Fig. 2 shows a plan view, and Fig. 3 a sectional view on line a: a: of Fig. 2.

Similar letters and figures refer to similar parts throughout the several views.

B represents the bed, made of iron or any other suitable material, having a plane upper surface and designed to receive the stock placed thereon.

P P represent side posts supporting framework, the upper part of which is circular, as shown by O.

In order to strengthen the machine, a crosspiece E may be used. It will be understood, however, that this cross-piece is not an essential element of the invention, but is used merely to give strength to the machine.

L is a lever, which is pivoted to the downward projection M. This lever is provided with a slot S, of sufficient size to allow the pivot to be moved within the slot, as shown in Fig. 1. The pivot is in the recess 3, thereby giving a greater leverage upon the knife in cutting the stock, which is placed on the side of the knife most remote from the pivotal point 3. 1 shows a similar recess in the other end of the slot, and 2 a recess at the center. This enables the operator to increase the stroke or increase the leverage, as he may see fit. By placing the pivot either in the recess 1 or 3 the draw out is increased as well as the leverage.

The framework 0 E and postsP P are preferably constructed separate from the bed and attached together in any suitable manner and then the whole rear side of the machine planed off, so that the rear side of the posts and bed will be in the same plane, as well as the" rear side of the framework 0. On either side I provide stops (shown byV V) in order to prevent the knife from being oscillated too far in either direction.

In Figs. 1 and 2 the position of the stock is shown when being operated upon at right angles to the stock. The gage G is fastened within the slot E by means of abolt and screw or other suitable means, and this gage may be set so as to cut the stock down to a bevel or even at a sharper angle, if desired.

In order to support the lever, I provide a hook or projection N, which bears against the inner side of the circular piece 0, thereby holding the knife and lever in position to make a shear out, as above described.

H represents the handle, by means of which the lever is operated. It will be observed; that the form of this handle may be varied, as may the method of attachment to the projection N.

K K represent the knife, which in them:- ample of my invention shown in the draw-- ings consists of a broad knife sharpened on either edge, so that it will cut in either direction. If desired, two knives might be applied to the lever; but I prefer to use one,as shown in the drawings. I also prefer to make the upper part of the knife broader than the lower part in order to allow the operator to out entirely through the stock with aless movement l of the handle than he would otherwise becom pelled to make.

Having thus described my invention, what Iotaim to have invented,and-desire-to secure by, I-lettersPatent, is-- v I r 1. In amiter-cutter, th'e'eom bin'ation of a, bed provided with stationary posts having; their rear faces in the same plane as the rear 5 face of "the bed, a projection depending from the bed, and a knife-carryinggleverpivoted;

- adj ustably to 'said projection at a point below the bd,suhstau-tially as described. l y 2. In a miter-cutter, the "combination of -a bed {provided with stationary posts for sup- 1 substantially as described.

porting the end of the material to be acted upon, adjustable gages for the opposite end 1 only of the material in front of the posts, being independent thereof, and a knife-carrying lever'adjn'stably pivoted at a point below the bed, substantially as described.

3. In a miter-cutter, the combination of a bed provided with stationary posts having their rear faces in the same planeas the rear face of the bed, a projection depending from the bed, a knife-carrying lever pivotally connected tosaid projection and having a series ofrecesses for the adjustment of its lower end upon its pivot, and" a guide to maintain the knife in close ,proximity to the posts and bed,

45 4. In a miter cutter, the combination of a bed provided with stationary posts having their rear faces in the-same plane as the rear face of the bed, a profiection depending from the bed, a lever, a knife carried thereby, and 50 an adjustable connectionibetween the lower end of said lever and said projection, whereby in theladj us'tm-en t of thelevertheknife is also adjusted to change the character of the out, substantially as described.

In witness whereof :I have hereunto set my :ha-ndand seal in the presence o'f two witnesses.

-ADOLPH B. -MASON, FRANK PALMER.

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