US691171A - Sharpener for knives or scissors. - Google Patents

Description

`No. 69|,I7L' Patented Jan. I4, i90-2.

C. A. PAYNE. SHARPENER FDR KNIVES 0R SGISSRS.

(Application led Oct. 23, 1901.)

(No Model.)

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CHARLES A. PAYNE, OF ST. PAUL, MINNESOTA.

SHARPENERFOR KNIVES OR SCISSORS.

SPECIFICATION forming part of Letters Patent N 0. 691,171, dated January 14, 1902.

V.lipplication filed October 23, 1901. Serial No. 79,619. .(No model.)

To @ZZ whom t may concern:

Be it known that I, CHARLES A. PAYNE, a citizen of the United States, and a resident of St. Paul, in the county of Ramsey and State of Minnesota, have invented a new and Improved Sharpener for Knives or Scissors, of which the following is a full, clear, and eXact description. l

This invention relates to a class of sharpening devices used tol renew the cutting edges of knives and scissors and embodying blades setat an angle to each other, so as to dispose the scraping edges of said blades for engagement with the sides of a knife-blade or of scissors-blades to sharpen the edge of such blades.

The object of my invention is to provide novel details of construction for a sharpening device of the character indicated which adapt it for very effective service and afford a compact, durable, and inexpensive implement equally available for sharpening the cutting edges of knives of different styles and for renewing the cutting edges of the blades of large or small scissors.

The invention consists in the novel construction and combination of parts, as hereinafter described, and defined in the appended claims. `f

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the figures.

Figure l is an end view of the sharpening device. Fig. 2 is a plan View of the same. Fig. 3 is a sectional view substantially on the line 3 3 in Fig. 2, and Fig. 4 is a plan view of one of the details which is a feature of the invention.

The improvement, in brief, consists of a flat cutter-plate having spaced blades at opposite sides, a flat guide-plate having fingers on opposite edges that may be disposed opposite the spaces between the cutter-blades, the guide-fingers being arranged to afford slots for the introduction of a knife-blade to be sharpened, means to connect these plates and hold them positioned for service as a knifesharpener, and a scissors-Sharpener formed on like ends of the cutter-plate and guideplate, as will hereinafter be described.

The cutter-plate 10 is formed of a substantially rectangular fiat steel planchet having greater length than width. Each side edge of the cutter-plate 10 is slotted oppositely at spaced intervals, these slots having proper depth and width to provide a plurality of spaced blades 1l at each side of the cutterplate.

The side edges of all the cutter-blades 1l are straight and parallel with each other, and

sharp corners are produced along said side edges, adapted by properly hardening the cutter-plate 10 to shave metal, the end corners of each blade being slightly rounded, as shown in Fig. 2.

The guide-plate 12 is in oblong form and comprises a flat sheet-metal piece of suitable thickness, either soft steel or wrought-iron being employed. The side edges of the guideplate 12 are notched oppositely and at spaced intervals, as clearly shown in Fig. 4, these notches d having such width as to slightlyA exceed the breadth of the cutter-blades 11 l and preferably have level bottoms d', as shown in Fig. 1. The notching of the guide-plate 12 permits a plurality of guide-fingers 13 to remain intact with the main portion ofthe guide-plate, and, as shown, these fingers are so spaced apart as to permit each finger to be disposed opposite a space between two of the cutter-blades 11.

The `ends of the guide-lingers 13 are preferably rounded, and the side edges of the ncrevicesb will be formed between these edge portions of the fingers and the base portions of the blades 11 when the cutter-plate and guide-plate are secured together, as .at let.

The free ends of the guide-fingers 13 are preferably formed of different widths along one side of the sharpening device, whichvwill obviously change the degree of sloping inclination given to the main portions of the IOS side edges thereon, and thus afford V-shaped slots C, the sides of which have dierent degrees of angular divergence.

It will be seen that by providing differentlyshaped slots c the device is well adapted to receive in said slots knife-blades which vary in thickness to sharpen their cutting edges, as will be further explained.

A bracket-support is provided for the combined plates 10 12 andconsists of two arms 15, that may be formed on a connecting member 15, the latter having such length as will separate the arms a distance nearly equal with the length of said plates, and the member 15a may be secured, upon the guide-plate 12 by the same fastening devices 14 that hold the Cutter-plate and guide-plate together.

The spaced arms 15 have their free ends cut into V shape, so that the plates 10 12 may be held inclined from a table-top A or the like if the sharpening device is seated thereon, as shown -in Fig. 1.

The scissors-sharpening device,which may also be used as a knife-blade sharpener, is formed at one end of the cutter-plate 10 and guide-plate 12, as follows:

Y The cutter-plate 10 has a projecting tongue d, formed at the center on one or both ends, said tongue having parallel side edges CZ', that terminate, respectively, at their inner ends in the bottoni edges of like notches d2, formed at each side of the tongue. From the outer ends of the notches d2 the exterior side edges of the outermost blades 11 are slightly inclined outward to the free ends of said blades, as shown at d3 in Fig. 2. At acorresponding end of the guide-plate 12, which projects beyond the nearest pair of guide-fingers 13, a

' tongue e, the counterpart of the tongue d, is

formed at the center of the guide-plate, and when the cutter-plate 10 and guide-plate 12 are secured together these tongues conform at their edges e d.

vThe side edges e of the tongue e at their inner ends terminate in the similar-sloped edge portions e2, that define the end wall of the guide-plate at each side of the tongue, as clear-1y shown in Fig. 4, and when the plates 10 12 are joined together by the fastening devices 14 the sloped edge portions e2 register with the slopes d3 on the end of the cutterplate 10. In using the sharpening implement for renewing the cuttingv edges of table-knives, carviugknives, or such knives as are employed for domestic purposes the device is placed on a suitable level support, such aS a tabletop A, near an edge A' of the same, so that the upper edge ofthe Sharpener will ineline toward said edge of the table.

Thel user of the implement holds the device firmly with one hand and with the knife in the. other handv applies the cutting edge of the knife-blade, to the Sharpener by introducing it into an appropriate slot c at the heel 0f 'the knife-bladev and with. proper pressure downward draws the blade through the slot.

It will beseen that theinclined edge of the guide-finger 13, engaged with one side of the knife-blade, will press the opposite side of the knife-blade at its edge forcibly against the sharp corner on the blade 1l, forming the other edge of the slot engaged by the knife-blade.

The pulling of and downward pressure on the knife-blade will cause the material at the edge thereof to be shaved away, so as to render this edge sharp after one or two passages of the knife-blade through the slot, and it will be seen that the crevice b at the bottom of the V-shaped slot c will prevent the cutting edge from vbeing dulled by an impinge upon either plate.

The cutting edge of the knife-blade may be completed by passing it through an adjacent slot, wherein the opposite side of the knife-blade will be caused to have contact with an edge of acutter-blade 11, so that the knife-blade edge will be rendered smooth and sharp by a few moments use of the implement.

The provision of a soft-metal guide-plate to coact with the cutting-plate adapts the fingers on the guide-plate to serve as a means for holding and guidingthe knife-blade into engagement with the sharp edges of the cntting-blades 11 and avoids cutting action on the side of the knife-blade engaged therewith. This provision and the provision of the crevices b render the improved implement very efficient in operation.

The different Widths afforded some of the slots c facilitate the sharpening of knifeblades that are tapered from back to cutting edge, have dierent thicknesses, and in some cases have their cutting edges formed by beveling one side of the knife-blade at its edges. As in all such different forms for knifeblades, the improved Sharpener is adapted to receive the blade of the knife and permit its edge to be effectively pressed into engagement with the scraping edge on a cutter-blade 11 if an appropriate slot c is occupied by the knife-blade.V

In using the implement as a scissors-sharpener a blade of the scissors is seated on an appropriate cutting edge of the` tongue d at the heel of the scissors-blade, thus impinging the bevel cutting edge of the scissors-blade upon the tongue, while the side face of the scissorsblade is held in contact with the sloped edge d3 of an engaged cutter-blade 11. The scissors-blade is now successively drawn from heel to point over the tongue d, so as to forcibly engage the sharp cornerl thereon, which will scrape sufficient material from the scissors-blade for effective renewal of the cutting edge of the blade thus operated upon.

After one blade of the scissors has been sharpened the implement is reversed in position, so, as to dispose the. opposite side edge of the tongue d uppermost, which will present an appropriate sharp corner thereon for engagement with the other blade of the scis- IOO PDM)

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