US1018579A - Knife and scissors sharpener. - Google Patents

Description

G. s. MILLER. KNIFE AND SGISSORS SHARPBNER.

APPLICATION FILED JAN. 31. 1910.

1,018,579. Patented Feb. 27, 1912.

COLUMBIA PLANOORAPH C0 WASHINGTON n c cnonen s. MILLER, or on'ronco, ILLINOIS.

KNIFE AND SCISSGRS SHAB-PENER.

Specification of Letters Patent.

Patented Feb. 27, 1912.

Application filed January 31, 1910. Serial No. 541,175.

To all whom it may concern:

' Be it known that I, Gnonon S. MILLER, a citizen of the United States, and a resident of the city of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Knife and Scissors Sharpeners; and I do hereby declare that the following is a full, clear, and exact description of. the same, reference being had to the accompanying drawings, and to the numbers of reference marked thereon, which form a part of this specification.

This invention relates to improvements in knife and scissors sharpeners of that class where a revolving or abrasive disk or wheel is employed to attain the result.

The object of this invention is to afford a sharpener by the use of which one with out previous skill can attain as good results as after long practice, and also to afford a construction adapted to definitely position the knife to insure the angle of operation for the abrasive cutter or grinder so that perfection of result is mechanically secured.

In the same manner it is an object of the invention to afford a construction in which the scissors blade is always presented to the grinder at exactly the angle necessary to insure the best results in sharpening Finally it is an object of the invention to afford a construction permitting considerable latitude or play in the operating arm, thus permitting the grinding element to follow the contour of the knife edge, at all times maintaining its proper angle of operation.

The invention consists in the matters hereinafter described and more fully pointed out and defined in the appended. claims.

In the drawings: Figure 1 is a side elevation of a device embodying my invention. Fig. 2 is an enlarged top plan view thereof, showing the same adjusted for knife sharpening. Fig. 3 is a section on line 33 of Fig. 2. Fig. I is a front elevation showing the device adjusted for scissor sharpening. Fig. 5 is an enlarged longitudinal section of the bracket and grinder arm. Fig. 6 is a section on line 6-6 of Fig. 2. Fig. 7 is a fragmentary view of a modified construction.

As shown in the drawings: 1, indicates a bracket provided with a clamp 2, for engaging the same to a table top or any suitable support. Said bracket extends substantially horizontally outward and is provided at its outer end with a horizontal transverse head 3, the upper face of which is planed or otherwise dressed off to afford an upward and outward inclination, as shown in Fig. 1, such angle of inclination being the angle determined upon as the most elfective angle for knife sharpening of the class to which the machine is to be applied. Secured on said arm by means of a bolt 4, and thumb 2 1, is a spring clamping plate 5, having a shank 6, through which said set screw engages said clamping plate, being extended longitudinally the head and acting to rigidly grip the knife X, thereon, as shown in Figs. 2 and 5, when in use. The outer or front face of said head 3, is planed or dressed off to afford a plane surface and is beveled upwardly and inwardly, as shown in Figs. 1 and 5, to re ceive the flat side of the scissors blade thereagainst and secured on said head is a complemental clamping jaw 6, shaped to engage the outer side of the scissors blade and firmly clamp the same in place. For this purpose, a bolt and thumb nut 7 and 8, are employed, said bolt extending through said head 3, and clamping jaw 6, as shown in Fig. 5, and permitting any desired degree of pressure upon the scissors blade to be attained.

Extending above the table and rearwardly from the clamp 2, is an arm 9, provided with a central vertical bore extending therethrough. Engaged therein is a pivot pin 10, provided with an integral. head 11, bored transversely to provide an eye, as shown in Figs. 2 and 3. Extending through said bore in said head is a pivot pin 12, the head 13, of which is likewise transversely bored to receive the cylindric end 1 1-, of the arm 15, thereon, and as shown, a nut 16, is threaded on the reduced end of said arm to hold the same at all times in operative relation. Said lever arm 15, extends forwardly over the grinding head and is provided at its forward end with an aperture therethrough adapted to receive the pin 17, on which is secured the circular grinding stone 18, of carborundum or any desired abrasive and, as shown, a handle 19, is threaded on said screw or bolt to firmly engage the stone thereto and also serves for manual engagement to manipulate said stone in sharpening.

The operation is as follows: Having secured the knife in place, as, for instance, by means of the bolt and nut 4 and 24, which binds the spring clamping jaw 5, down wardly thereon, the arm 15, is lifted by means of the handle 19, and resting upon the blade of the knife (the edge of which is directed outwardly) said stone is swung back and forth from point to heel until one side thereof has been brought down sufficiently whereupon the knife is reversed to bring the other side of the blade uppermost and the operation is repeated until the de sired edge is attained. In the same manner the scissors blade is engaged against the head by means of the clamping jaw 6 therefor and the grinder swung back and forth over the edge thereof always presenting the same angle to the work, and owing to the rotation of the stone on the arm, insuring the uniform dressing of the stone while grinding. In either event, as the grinder approaches an inclined face, as, for instance, the point of the knife or the point of the scissors blade, the universal joint afforded by the connection between the arm 15, and bracket 9, permits said stone to rock downwardly sufficiently to follow the edge, thus grinding either the knife or the scissors or any cutting implement uniformly for the entire length of the blade.

In the construction shown in Fig. 7, two grinding elements 18 and 20, or a grinding and a finishing element, are secured on opposite'sides the arm 15, by means of any suitable connection, as, for instance, a bolt 21, is embedded in the element 18, and is threaded to engage in a threaded socket in element 20, thus engaging both elements to the arm on opposite sides thereof. A'handle 22, is secured to the end of the arm. This permits either grinder or cutter to be used as the arm may be rotated in the head 13, to bring either into action.

Of course, I am aware that various modi fications in the construction may be effected without departing from the principles of this invention, and I therefore do not purpose limiting myself otherwise than necessitated by the prior art.

I claim as my invention:

1. The combination with a suitable supporting bracket, of an inclined clamping jaw thereon, an adjustable clamping jaw adapted to engage a knife thereon, an arm pivoted on said bracket by means affording a universal joint to swing over the blade of the knife, a grinding disk on said arm adapted to operate on said blade for its entire length, and a handle engaged on said grinding disk and affording means for manually operating and rotating the same while engaged on the knife.

2. The combination with a suitable supporting bracket, of an inclined clamping jaw thereon, an adjustable spring clamping jaw adapted to engage" an edge tool thereon, an arm pivoted on said bracket to swing over the blade of said tool, a grinding disk on said arm adapted to operate on said blade for its entire length, a universal joint affording a part of the connect-ion between said arm and said bracket to permit the surface of said disk following the edge of the tool, and a handle engaged on said grinding disk aifording means for manually operating and rotating the same while engaged on the knife.

3. The combination with a suitable bracket, of a knife supporting face and clamping jaw thereon, a flat inclined face thereon adapted to be engaged by a scissors blade, an adjustable clamping jaw complemental therewith to engage the scissors blade thereto, an arm engaged to rotate and to swing on the bracket and adapted to be swung over the blade of the scissors, and a rotatable grinding element carried on the end of the arm for engagement with the scissors.

4c. The combination with a suitable bracket, of a knife support-ing face, a clamp ing jaw for securing a knife on said face, a flat inclined face adapted to receive a scissors blade thereon, an adjustable clamping jaw for securing the scissors blade there to, an arm engaged on'the bracket to rotate and to swing horizontally and also vertically, a rotatable grinding stone carried on the end of the arm for engagement with the knife or the scissors, and a handle affording means for moving said arm and stone and rotating the stone while in operation.

5. A device of the class described, embracing a bracket, a head thereon provided with an inclined face to receive a knife, a clamping jaw adapted to clamp the knife thereto in position for sharpening, said head provided with an inclined face to receive a blade of a scissors thereagainst, a clamping jaw adapted to clamp the scissors blade to the head for sharpening, an arm engaged on said bracket to rotate and to swing in either of two planes, a grinding stone on the end of said arm adapted to operate on the blades to be sharpened when swung along the edge thereof, and a handle for operating the stone.

6. A device of the class described, embodying a bracket, a head thereon provided with two inclined faces, one for receiving a knife blade and the other for receiving a scissors blade, clamping jaws for the same, and a grinding element adapted to operate on either of said blades.

In testimony whereof I have hereunto subscribed my name in the presence of two subscribing witnesses.

GEORGE S. MILLER.

Witnesses C. IV. Hnms, K. E. HANNAH.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G.

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