US2413156A - Sharpening device - Google Patents

Description

Dec. 24, 1946. s. TARAPCZYNSKI 2,413,156

SHARPENING DEVICE Filed Sept. 12, 1945 2 Sheets-Sheet l Inventor Sigmund YEMPCZJUZSkZ, /0

Dec. 24, 1946. s. TARAPCZYNSKI 5 SHARPENING DEVICE Filed Sept. 12, 1945 2 Sheets-Sheet 2- Patented Dec. 24, 1946 SHARPENING DEVICE Sigmund Tarapczynski, Buffalo, N. Y., assignor of twenty-five per cent to Mathias-J.- Gehen, twenty-five per cent to Joseph J. Agugliaro, and twenty-five per cent to John Orosz, all of Buffalo, N. Y.

Application September 12, 1945, Serial No. 615,825

1 Claim. (C1. 51-214) My invention relates to improvements in sharpening devices for knives, and the like, the primary object in view being to provide a simply constructed sharpening device adapted for easily and quickly sharpening both sides of the edges of knives, and which is equipped for prolonged use, Will not get out of order, and may be manufactured at a low cost as a household implement or shop accessory.

Other and subordinate objects also comprehended by my invention, together with the precise nature of my improvements and the manifold advantages thereof, will be readily understood when the succeeding description and claim are read with reference to the drawings accompanying and forming a part of this specification.

In said drawings:

Figure 1 is a view in edge elevation of my improved sharpening device in a preferred embodiment thereof,

Figure 2 is a view in side elevation,

Figure 3 is a view in end elevation,

Figure 4 is a fragmentary view in perspective of one of the sharpening stones,

Figure 5 is a view in edge elevation illustrating the manner in which the sharpening device is used to form a V-notch,

Figure 6 is a fragmentary view in longitudinal section, taken on the line 6-6 of Figure 3 and drawn to an enlarged scale,

Figure 7 is a similar view taken on the line '!---I of Figure 8 and drawn to an enlarged scale,

Figure 8 is a fragmentary view in perspective illustrating the sides of the holder and the pairs of stone-holding bars with the sharpening stones removed,

Figure 9 is a detail view in transverse section taken on the line 9 of Figure 1,

Figure 10 is a view in end elevation of a modified embodiment of the invention, and

Figure 11 is a fragmentary view in perspective of one of the sharpening stones of the modified embodiment of the invention.

Reference being had to the drawings by numerals, and to Figures 1 to 9 thereof in particular, my improved sharpening device in the preferred embodiment thereof comprises a sharpening stone holder 1 of flexible, resilient sheet metal, preferably, forming a U-shaped hand grip at one end thereof with opposite sides 2, 3 terminating, one in a right angled end 4, and the other in an edgewise tapering end 5 lying in the median plane of the holder l.

Pairs of spaced apart, elongated, stone-holding bars 6 extend endwise and parallel from the end 4 of the side 2 coplanar with said end, the pairs being spaced apart upon opposite sides of the median plane of the holder l, and the bars 6 in each pair being V-shaped in cross-section with apex sides facing. A single pair of stone-holding bars 1, similar to the pairs 6, extend in like manner from the end 5. Edge flanges 8, 9 on the ends 4, 5 provide flat seats for sharpening stones, to be described. The pairs of bars 6 are spaced apart sufliciently to accommodate the pair of bars 1 therebetween in a manner and for a purpose presently seen. Said pairs of bars 6, I may be fastened to the ends 4, 5 by welding, not shown.

A pair of elongated, flat, sharpening stones H) with V-shaped side edge grooves ll therein are slidably fitted endwise, with a friction fit, between the bars of the pairs 6, and are preferably coextensive in length with said bars. A single sharpening stone I2, similar to the said stones i0, is fitted in like manner between the pair of bars 7. The inner ends of said stones in and i2 seat on the flanges 8, 9.

A pair of links l3, M with inner ends pivoted together, as at l5, and outer ends pivoted, as at 16, to the sides 2, 3 normally hold said sides parallel and the pairs of bars 6, I with the sharpening stones ID, ll spaced apart laterally and parallel. As will be seen, the pair of links l3, I4 provide a break joint connection permitting flexing of said sides 2, 3 toward each other.

In using the described sharpening device, the holder I is grasped by one hand by the hand gripforming end thereof and the sides 2, 3 are flexed toward each other, the break joint connection between the links 13 and l 4 being broken by a finger of the hand. By such flexing of the sides 2, 3, the sharpening stone l2 may be interposed between the pair of sharpening stones It] in crossed relation thereto to form a V-shaped sharpening notch I! out of a portion of the sharpening stone :2 and the pair of sharpening stones Hi, all as shown in Figure 5. A knife, not shown, to be sharpened is placed in said V-notch I] and the sharpener moved along the edge of the knife so that the V-notch abrades both sides of the cutting edge of the knife. By varying the pressure on the sides 2, 3 of the holder I, the angle of the V-notch l'l maybe varied to suit sharpening requirements. The sharpening stones l0, l2 may be withdrawn from between the stone-holding pairs of bars 6, l and interchanged and reversed to obviate uneven wear on said stones.

In the modified embodiment of invention shown in Figures 10 and 11, straight sided pairs of stoneholding bars i8 are utilized in lieu of the pairs of V-shaped bars 6 and a similar pair of straight sided stone-holding bars IS in lieu of the pair of stone-holding bars 1. A pair of sharpening stones 2!] with straight sided grooves 2| are provided in lieu of the described pair of stonesl0 and a similarly grooved sharpening stone 22 is provided in lieu of the single sharpening stone H. The stone-holding bars I8, l9 are formed integrally with the holder instead of being welded thereto as in the preferred embodiment of the invention. Otherwise, the structure of the modified embodiment of the invention is the same as in the preferred embodiment thereof.

The foregoing will, it is believed, sufflce to impart a clear understanding of my invention without further explanation.

Manifestly, the invention, as described, is susceptible of modification without departing from the inventive concept, and right is herein reserved to such modifications as fall within the scope of the appended claim.

What I claim is:

A sharpening device for knives comprising a sharpening stone holder of U-shape in crosssection and including a hand grip end portion with sides of resilient material flexible toward and from each other, elongated sharpening stones with flat sharpening faces mounted on said sides to extend endwise therefrom parallel therewith and movable into crossed relation upon flexing of said sides toward each other to form a V-shaped sharpening notch for straddling the edge of a knife blade, and a pivoted link connection between said sides of the hand grip portion for limiting flexing of said sides away from each other, the mounting for said stones comprising pairs of stone-holding bars on which said stones are slidably fitted with side edge grooves therein receiving said bars, said bars being thinner than said stones to lie between the sharpening faces of said stones so that said faces are clear of said bars.

SIGMUND TARAPCZYNSKI.

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