US2515247A - Knife sharpener - Google Patents

Description

July 18, 1950 F. s. MCCABE KNIFE SHARPENER Filed Feb. 5, 1947 Patented July 18, 1950 UNITED STATES -PATENT OFFICE 2,515,24r KNIFE sn r arn'NER a Frank s. MccabgKenilworth, 111. Application February 5, 1947, Serial No. 726,539

The present invention relates generally to utility devices, and more particularly to a knife sharpener. I

An object of the present invention is to provide a novel knife sharpener which is adapted to accurately, efliciently, and safely sharpen knives.

Another object is to provide a novel knife sharpener in which the knife edge is self directed into proper position in respect to blade sharpening members.

Another object is to provide a novel knife sharpener incorporating a slotted shield through which the knife blade extends for contact with blade sharpening wheels, which, in addition'to forming a guide for sharpening purposes, reduces to a minimum the possibility of the user being cut by the blade duringthe sharpening action.

Another object is to provide a novel knife sharpener incorporating removable and reversible knife sharpeningwheels.

Another object is to provide a novel knife sharpener which is mounted on a frame adapted to be disposed on a post bracket for swinging out of the way when not in use.

. Other objects are to provide a novel knife sharpener which is sturdy in construction, in which the blade sharpening parts are replaceable, which may be readily employed by a user with maximum efiiciency after minimum instruction,

which is relatively inexpensive, and whichmay be readily fabricated.

The foregoing and other objects and advantages are apparent from the following description taken in connection with the accompanying drawing, in which:

Fig. 1 is a side elevational view of a knife sharpener constructed in accordance with the teachings of the present invention, mounted on a bracket secured to a wall for swinging out of the Way when not in use;

Fig. 2 is a fragmentary plan view of the knife sharpener;

Fig. 3 is an elevational view similar to Fig. 1, showing the other side of the knife sharpener;

Fig. 4 is an end elevational view thereof, a part of the handle being broken away for conservation of space;

Fig. 5 is a vertical transverse cross-sectional view on the line 5-5 of Fig. l, a portion of the handle being broken away for conservation of space; and

Fig. 6 is an enlarged fragmentary cross-sectional view of the two abrasive wheels.

Referring to the drawing more particularly by 1 Claim. (01. 51-416) reference numerals, l0 indicates generally a knife sharpener incorporating the concepts of the present invention. The knife sharpener II] includes a body 12, preferably of metal, formed as a 1: wall l4 from which extends a horizontal flange I 6 and a vertical flange [8 which merge in a substantially arcuate corner 20, as is clear from Fig. 3. The wall I4 includes reinforcing bosses 22 and an aperture 24 which receives a bushing 26 peened' over and secured to the edges of the aperture 24, as is clear from Fig. 5.

A shaft 28 is rotatably supported in the bush ing and include-s a reduced portion 30 having athreaded extremity 32. Two blade sharpening discs 34 are disposed in contiguous relation and are mounted on the reduced portion 30 of the shaft 28 for'rotation therewith, as is shown in Fig.5, a large washer Or disc 36 being disposed against the outer surface of each, one washer 36' bearing against the shoulder of the shaft 28' formed at the juncture of thereduced portion. 3 0, andthe main portion thereof, and the other" washer 36 being securely engaged by a nut threaded onto the extremity 32. The discs 34 are shown as of abrasive material, but metals or other materials may be used. The preferred cross section of the abrasive discs 34 is shown in Figs. 5 and 6, the periphery of each being rounded to provide an annular V-groove 35 when in'cone tiguous relation. A crank arm 40 is secured to' the end of theshaftZB for rotation'therewith and has a knob 42 connected to its free end, preferably being rotatably mounted on a stud 44 to insure ready rotation of the discs 34.

As is clearly shown in Figs. 2 and 4, a continuous slot 46 is formed in the flanges l6 and i8. The slot 46 is formed at an angle to the vertical in the flange l8, being disposed at an angle of about 7 to the vertical for a major portion of the length in the flange l8, changing to an angle of about 14 for the remainder of its length in the flange l8 and continuing at the same angle of substantially 14 in the horizontal flange [6. It is clear from the drawing that the slot 46 crosses the common plane of the abrasive discs 34. In a preferred form, a slot 46 of a width of between seven and eight one-hundredths of an inch has been used.

The body I2 is secured by rivets so to the flange 52 of a sleeve 54, which is shown removably disposed about a post 56 mounted in upright position on the horizontal flange 58 of a bracket 60, the vertical flange 62 of which is shown secured to a wall 64 by suitable screws 66. The bracket includes a second horizontal flange 68 to 3 steady the post 56. The flange 58 includes peripheral notches 10 which receive selectively a heel 12 of the flange 52 for disposing the knife sharpener ill at right angles to the wall 64, or alongside thereof, as desired.

Operation wise in Fig. l), a knife blade placed in the "slot 1' 46 will have the edge thereof contacted by both abrasive discs 34, so that sharpening action is simultaneously applied to both'side'sof' theblade The location of the slot to effect a keen edge. 46 in respect to the abrasive discs 34 is such that a user. need but insert the blade of a knife in theslot 46'and move'it longitudinally of the slot whilerotating the abrasive discs 34. r

It. is. clear that the flanges l6 and I8 form a shield to prevent one usingthe knife sharpener [0 from being burnedby the fast movingabrasive discs "34 and from being cut by the keen edge of a knife being sharpened, occasioned by injudisive .discs 34 by the slot 45, the obtaining of a 40 keen edge becomes routine with'the present novel device. I

It is to'be understood that a second slot may be fdrmedin the flanges i6 and I8 crossing the first slot 46 at an angle to form an X. The second 45 slot. will, be formed in identicalfrespects. to the flanges [S and I8 and other elements of the knife. sharpener ID as the slot 46 is formed, except its. course will be from right to left (Fig. 4) instead offfrQm left to right.

It is apparent that there has been provideda 4 knife sharpening device which fulfills all of the objects and advantages sought therefor.

It is to be understood that the foregoing description and the accompanying drawing have been given by way of illustration and example. It is also to be understood that changes in form of the several parts, substitution of equivalent elements, and rearrangement of parts, which will be readily apparent to one skilled in the art, are contemplated as within-the'scope of the present invention, which is limited only by the claim which follows.

What is claimed is:

A knife sharpener comprising a housing having an elongated plate portion provided with merging "connected top and front end flanges extending substantially right angularly from the inner side 'of said portion and terminating in free edges in atplane substantially parallel to the plane of the plate portion, means provided on the rear end of said portion for-mounting the housing on a supporting 'rnember, a bearing extending from. the outer side of the plate portion substantially equidistant from saidfianges, a shaft journaled in the bearing, abrasive wheel means removably mounted on the inner end of the shaft and provided with a peripheral groove'adjacent to and partly surrounded by said flanges, and a handle for rotating the'shaft fixed ontheouter end of the shaft, the flanges being slotted to admit a knife edge tothe-groove of the abrasive wheel means and said wheelmeans-being removable-for replacement from the open inner side of the housing. v

S. MCCABE.

REFERENCES men) The following references are of record in the file of this patent:

UNITED sTATEs PATENTS .Number Name Date 795,568 Woodworth; July 25, 1905 1,027 005 Seymour May 21, 1912 2,114,106 Geveke Apr. 12, 1938 2,257,407 -.S'ept. 30, 1941 2,420,814 Clark" May 20, 194:7

FOREIGN PATENTS.

50 Number, Country I Date 40,753 Netherlands May 15, 1937

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