US56403A - Improved machine for grinding cutlery - Google Patents

Description

UNITED STATES PATENT OFFICEO RUSSELL S. GLADWIN, OF MERIDEN, CONNECTICUT.

IMPROVED MACHINE FOR GRINDING CUTLERY, 80C.

Specification forming part of Letters Patent No. 56,403, dated July 17, 1866.

To all whom it may concern:

Be it known that I, RUssELL S. GLADWIN, of Meriden, in the county of New Haven and State of Connecticut, have invented a new and useful Improvement in Machines for Grinding Cutlery, Tools, Ste.; and I do hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawings, making a part of this specification, in which- Figure 1 represents an elevation of the machine. Fig. 2 represents a top plan, and Fig. 3 represents a sectional elevation thereof at the line x a: of Fig. 2.

Similar letters of reference, where they occur in the separate figures, denote like parts in all the drawings.

My invention consists in giving to the facewheel which holds and carries around the knife or other blanks to be ground a tipping motion as each blank comes under the grindstone, so as to grind it tapering in two directions-viz., in the line of its length and transversely thereto.

To enable others skilled in the art to make and use my invention, I willproceed to describe the same with reference to the drawings.

On or in a suitable frame, A, there is hung a face-wheel, B, that is grooved or shouldered radially or nearly so, as seen at a a, 85e., into which grooves or against which shoulders the backs of the knife-blanks b are placed and supported while under the stone C.

The face-wheel is supported in a cross-piece, D, which can be raised or lowered by the gears c d cf, so as to bring said face-wheel and the articles to be ground properly up to the grindstone C, which is hung upon the shaft E and rotated in any of the usual ways. The grindstone C, as represented, is quite narrow on its face. In practice the Width of the stone should equal the length of the knifeblanks--say six inches, more or less.

The table B is revolved slowly by means of a worm-gear, g, on the shaft F, and the cogged gear h and worm or screw gear i on the shaft G, which latter worm or screw gear z' works into the rim i of the table B, and thus turns it.

Upon the cross-piece or cross-head D, and underneath the grinding-point of the stone, there is a friction or bearing roller, m, and upon the under side of the rim of the face-plate or table B, and opposite each groove, shoulder, or recess a upon its top surface, there is a slight cam, n, (distorted as to size in the drawings, so as to be more readily seen,) which cams, as they come in contact with the friction or bearing roller m, raise up the table and bring each knife-blankin succession up against the stone, and so that it will be ground tapering as to length of blade and beveled as to width of blade, or in the shape ofthe finished knife.

Each recess a is made with a shoulder at one of its edges, from whence it is beveled or run out to the surface of the table.

The back of the knife-blank lies against the shoulder of the recess, while the balance of it is on the inclined plane extending from said shoulder to the surface of the table. These shoulders are reversed on some of the recesses, so that the blank can be turned over, while the tang will always be at the center of the table.

In practice the table turns very slowly and the stone very rapidly, and the stone, whenof proper width, begins to grind first at the heel ofthe blade, and gradually, as the table turns, approaches the point ofthe blade, which point, by means of the rising of the table, as above described, brings the blade harder up against the grindstone and removes more from it.

The journal upon which the table turns may be hollow and the center of the table dished out, so that the water and drippin gs from the stone may pass off through said shaft or journal.

A burr, H, controlled by a rod, I, may be drawn to or forced from the stone C, and held in either position by the dog and ratch o. Its purpose, when drawn against the stone, is to roll against its surface for the purpose of keeping it sharp or taking off the glaze.

' Having thus fully described my invention, what I claim is In combination with a revolving grindstone.

and a roller or its equivalent placed opposite its grinding -point, an interposed table with suitable recesses for holding the knife or other blank to be ground, and series of cams under said table and operating in connection with the stone and the roller, substantially in the manner and for the purpose set forth.

UUSSELL S. GLADWIN.

Witnesses ESTHER Gnrees, OnvILLE H. PLATT.

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