US1509136A - Knife sharpener - Google Patents

Description

Qept. 23 9 192%,

M. G. GOFF KNIFE SHARFENER Original Filed Aug. 4, 1922 swim/M301.

Patented Sept. 23, 1924. i

rarest OFFICE.-

MILTON G. corn, or DETROIT, MICHIGAN.

KNIFE. SHARIPENER.

Application filed August 4, 1922, Serial No. 579,724.

To aZlw/wm-t't may concern .Be it known that I, MILToN G. Gorr, a citizen of theUnited States, residing at Detroit, in the county Michigan, have invented certain new and usefulImprovements in Knife Sharpeners,

of which the following is aspecification.

The invention relates to improvements in a sharpening device particularly applicable for the sharpening of knives, scissors, or any other cutting implement having a blade.

It is an object of the invention toprovide a knife sharpener composed of a minimum number of parts, and onewhic-h is very in expensive to manufacture, yet possessing the desired durability.

The invention more specifically aims to provide a knife sharpener having a handle portion formed from a single stamping of metal and provided with av transverse depression constituting a guard to prevent the hand of the user from accidentally coming into cont-act with a blade during a sharpening action.

\Vith this novel conception in mind the handle preferably consists of a stamping of metal formed at its outer end with a frame member to which cutting disks are attached with their peripheral portions in contact, a transverse depression or corrugation being provided in advance of said frame member and from which depression the handle gripping portion extends.

In the accompanying drawings I have shown the preferred embodin'ient of this invention, in which Figure 1 represents a plan view; and Fig. 2,'a side elevation.

Referring now more particularly to the drawings wherein like reference characters indicate corresponding parts, the numeral 1 designates the hand gripping portion of the instrument, which is composed of a stamping of metal preferably sufficiently, thick to have the desired rigidity. This hand gripping portion is formed with a curved contour along the edge 2 to facilitate the grasping of the implement without danger of slipping thereof. At the lower portion of the handle gripping part 1 of the instrument I form in the stamping a depression or corrugation 3 which is laterallydisposed and preferably extends entirely across the hand portion. This corrugation is of a substantial width and depth and receives the foreof Wayne and State of.

Renewed June 1924.

finger 4 of the user when the device is in operation, as clearly shown in Figure 1. The thumb of the user preferably engages the portion f the corrugationso that it constitutes a stop for the thumb. S'errations 6 are provided along the inner and outer surfaces of the corrugation to constitute anti-slipping surfaces for the fingers.

Beyond the corrugation'there is provided a cutting frame member 7 which lies substantially in the same plane as the handle gripping part 1, it being apparent that the handle gripping part is separated from the frame by the corrugation 3. This frame is formed with diverging extensions 8 between which there is provided a slot 9 extending a substantial distance within the frame for purposes which will hereinafter appear.

The diverging portions 8 of the frame are preferably formed with circular openings 10, and these openings are adapted to receive rivets 11. The rivets secure to the frame the cutting disks 12, which disks are positioned side by side with their peripheral edges in contact above the end of the slot 9.

It willbe observed that the cutting disks are disposed at right angles to the rivets l1 and that said cutting disks are firmly united to the frame 7 lying directly thereagainst so as to be rigidly supported against vibration or chattering during the use of the instrument. The rivets are preferably so constructed as to prevent an accidental rotation of the disks 12 during a cutting operation, but when it is necessary to adjust said disks so as to present different peripheral surfaces into contact with one another, then by the use of pliers or like implements the disks can be adjusted without disturbing the rivets and when so adjusted usually remain in their adjusted positions.

'When the instrument is in use a knife edge is placed bet-ween the disks 12 in the slot 9. The disk is drawn across the edge of the knife as shown in Figure l, the instrument being held in a slightly inclined position. It has been found that when sharpening a knife by drawing the implement across the edge of the blade, the implement can be most accurately centered with reference to the apex of the blade resulting in placing a very sharp edge on the blade. However, when sharpen ing a knife in this manner ifthe finger should happen to slip great injury will result, as it sharp.

is apparent that many blades are exceedingly \Vith the type of sharpener as disclosed in the-application of I-Iopkis, Serial No. 405,611, of which I am the entire assignee, this objectionable feature has been encountered, and the present invention'aims primarily to provide an inexpensive handle whereby the finger is prevented from slipping into contact with a cutting edge during a sharpening action.

As clearly shown in the drawings, the

' forefinger of the hand I enters a corrugation 3, one of the walls thereof providing a stop to. limit the forward movement of the finger. The thumb likewise engages the other surface of the corrugation, so that neither the thumb nor the forefinger would be injured.

Having thus described my invention, what I claim is:

In a knife sharpener, the combination with 20 tegral disk-supporting extensions beyond 25 said corrugations, a Hat cutting disk supported by each of said extensions with the peripheral edges of said cutting disks in contact, said extensions being separated so as to provide a slot extending inwardly beyond 30 the meeting edges of said cutting disks.

In testimony whereof I aifix my 'slgnature.

MILTON corn.

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