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Publication numberUS1365161 A
Publication typeGrant
Publication dateJan 11, 1921
Filing dateSep 13, 1919
Priority dateSep 13, 1919
Publication numberUS 1365161 A, US 1365161A, US-A-1365161, US1365161 A, US1365161A
InventorsEisenhauer Charles J
Original AssigneeEisenhauer Charles J
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
US 1365161 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)




1,365,163... Patented Jan. 11,1921. l

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Specification of Letters Patent.

Patented Jan. 11, 1921.

Application led September 13, 1919. Serial No. 323,540. i

To all whom 'it may concern: v

Be it known that I, CHARLES J. Eisma- HAUER, a citizen of the United States, residing at Lebanon, in the county of` Lebanon and State of Pennsylvania, have invented certain new and useful Improvements in Knife-Sharpeners, of which the following is a specification.

My invention relates to. improvements in knife Sharpeners and more particularly to devices of this type adapted for sharpening bread and meat knives.

T he object of my invention is to provide a simple device of this character by which knives can be sharpened quickly and easily, which is automatically adjustable to ac-v commodate knives of different bevels or thickness.

Another object of my invention is to provide a knife Sharpener, the movable parts of which are completely inclosed thus iendering the device practically fool-proof.

.Other and further objects and advantages will be in part obvious and in partdescribed as the specification is proceeded with.

ln the accompanying drawings:

Figure 1 is a perspective view of the invention;

Fig. 2 isa front elevation with the front plate of thecasing removed;

Fig. 3 is a section taken on the line 3-3 of Fig. 2;'and

Fig. 4 is a perspective View of one.. of the slidable blocks removed from the casing.

Referring' more particularly to the drawings in which like reference numerals rep resentsimilar parts throughout the several views, 'denotes a base plate mounted upon which is a rectangular casing 6 comprising end plates 7, side plates 8 and top plate 9, preferably of wood. The casing is divided centrally by a vertical slot or space 10 thus forming two communicating compartments 11 and 12.

Each compartment 11 and 12 is provided with guideways 13 and 111 formed on the bottom face of the top plate 9 and the top face of the base plate 5 respectively, at opposite ends of the casing. The guideways may be formed in any suitable manner as by means of spaced strips 30.

A pair of blocks 15 and 16 are slidably` mounted within the guide ways by means of strips 17 and 18 attached to the top and bottom edges of the blocks. The inner faces 19 and 2O of these blocks are inclined or beveled from top to bottom and to these beveled faces a pair of carborun'dum stones 21 and 22 are attached by means of screws oi the like 23. The Stones occupy or cover about one half the width or face of the blocks, the other half being cut away at an i oblique angle at their lower edges, as at 241 and 25, to permit blocks and stones toward each other beyond the center of the casing, under the action of coil springs 26 and 27. The location of the stones 21 and 22 is such that `when the blocks have approached each other .to the limit of their forward or inward movement, the lower half of the face 2() of the block 16 seats within the cut away portion of the block 15 and the lower half of the face 19 of block 15 seats within the out away portionofth'e block 16, thuscaiising the stones to cross at an oblique angle.

In order to sharpen a knife, the blade ofk movement of 4the' thereof is inserted in the slot 10', and drawn backward and forward a few times between the reversely inclined crossed stones 21 and 22. .Downward pressure exerted on the knife by the operator causes the `blocks toy slightly reciprocate in their guide ways in an obvious manner, thus permitting the carborundum stones to accommodate themselves to knife blades of different bevels.

Having thus described my invention, what passing through said top wall and said sidel walls, guideways in said top and bottom wall. a pair of opposed blocks having means on their ends slidably engaged in said guider ways, said blocks having reversely inclined opposed faces, sharpening stones attached to said faces, said blocks having reversely located cut away portions to permit saidy stones to cross each other.


Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2430700 *Aug 28, 1945Nov 11, 1947Maxwell BermanKnife holder-sharpener
US2454035 *Apr 4, 1946Nov 16, 1948Clark Earl WKnife and scissors sharpening device
US2496578 *Nov 15, 1947Feb 7, 1950New England Carbide Tool CompaKnife sharpener
US4624079 *Apr 29, 1985Nov 25, 1986Bonapace Mario JKnife sharpener
US5440953 *Sep 22, 1994Aug 15, 1995Tru Hone CorporationKnife sharpener
US8591291 *Apr 20, 2009Nov 26, 2013Tore EklundApparatus and grinding block for the treatment of an edge or a cutting edge
US20110053473 *Apr 20, 2009Mar 3, 2011Tore EklundApparatus and grinding block for the treatment of an edge or a cutting edge
U.S. Classification451/486, 285/119
International ClassificationB24D15/00, B24D15/08
Cooperative ClassificationB24D15/081
European ClassificationB24D15/08B