US2069608A - Scissors sharpener - Google Patents

Description

Feb. 2, 1937. HAMMOND 7 2,069,608

SCISSORS SHARPENER Filed Aug. 29, 1934 Patented Feb. 2, 1937 A'EENT jOFFHQE SCISSOES Grant Hammond,

Application August 29,

3 Claims.

My invention relates to the class of devices employed for Sharpening scissors, shears, and the like, and an object of my invention, among others, is to provide a sharpener of this sort that shall .3 be particularly eificient in producing an edge upon scissors or shear blades, one not requiring special skill in its manipulation and one by means of which an edge may be produced with little effort.

One form of a device embodying my invention 10 and in the construction and use of which the objects herein set out, as well as others, may be attained is illustrated in the accompanying drawing in which Figure l is a side view of my improved scissors sharpener.

Figure 2 is a similar view showing a modification of the device.

Figure 3 is an end view.

Figure 4 is a detail view looking at the end of the sharpener, the post being cut in section, the View illustrating the operation of the sharpener on a pair of scissors.

Figure 5 is a side view illustrating the method of operation, the scissors blades being cut in section.

Figure 6 is a detail view showing another modification.

The sharpening of scissors and shear blades is a process requiring a great deal of skill, so much so that barbers in particular are Wont to send their shears considerable distances to have the sharpening properly performed, machines especially arranged being often employed in order to produce proper edges upon the blades. It is most essential to satisfactory operation of scissors or shears that the bevel shall be the same on both of the blades and in methods heretofore employed, without the use of a special machine, this has been practically impossible.

I have overcome this condition by providing a scissors sharpener which will not require any particular skill in its use and in which the blades of a pair of scissors or shears may be readily sharpened with little effort, such sharpener being shown in the accompanying drawing in which the numeral 5 denotes the handle of my improved sharpener, this being preferably of slightly oval shape in cross section and of a form to be readily grasped between the fingers and thumb. This handle supports at one end a, bar I that is preferably formed integral with the handle, the whole being preferably composed of metal of any desired kind. A sharpening post 8 extends outwardly from the bar 1, this post being composed of any suitable metal which will cut or wear away SHARPENER New Haven, Conn.

1934, Serial No. 741,925

(Cl. YE-82.2)

the metal of scissors or shear blades l5l6. I have found high grade tungsten steel corrugated lengthwise to satisfactorily answer the purpose.

The bar l is provided with a guide or blade rest 9 and a ledge iii located on opposite sides of the post 8, the latter being preferably of oval shape in cross section and as shown in Fig. 4 of the drawing. Said guide and the post are preferably relatively arranged at an oblique angle one to the other, this angle being the same as that which the bevel on a scissors or shear blade bears to the fiat side of the blade to perform efficient service. The ledge It serves principally as a support for the post 8.

In the structure shown in Fig. 1 the edge of the guide extends at right angles to a plane passing centrally through the handle 5 crosswise thereof, and the post 8 extends obliquely to such plane. In the form of the device shown in Fig. 2 the guide H is arranged with its edge across which the blades are drawn oblique to a plane passing centrally through the handle crosswise thereof, and the post 8 projects from the ledge l2 in the line of said plane or parallel thereto. In either device the same bevel is imparted to both scissors or shear blades.

In the sharpening operation the flat side of one of the blades is placed squarely upon the guide 9 or H and in this position, the blades being opened, as shown in Fig. 4, are pressed against the post 8 by means of a closing pressure upon the handles of the scissors or shears. The blades are then pushed along the post, the blade upon the rest 9 or H being maintained flat against said guide, and the abrasion of the post against the edges of the blades will produce a sharpened edge and the beveled edge on each of the blades will be precisely the same as that upon the opposite blade. One or two endwise passes of the blades across the post will usually be found sufficient to impart the proper edge to such blades Hil5.

In order that the sharpened edge I3 which is on the fiat side of the blade which is drawn across the guide 8 or it shall not be dulled a space I4 is created between the end of the guide 9 or the guide it and the post 8, the sharpened edge I3 passing along the mouth of this face. and such edge is therefore not damaged in the sharpening operation. I

In the form of the device shown in Fig. 6 the ledge II is just of suiilcient length to provide material Within which to anchor the post 8.

In accordance with the provisions of the patent which I now consider to represent the best emstatutes I have described the principles of operation of my invention, together with the device loosely held between the thumb and fingerwhereby the oval shaped sharpening member is rsubstantially'free to present itself to varying beveled cut ting edges of scissors blades. 7 r

2. A scissors sharpener including a base,,a finger piece carried by one side of the base and adapted to beheld between the thumb and fingerand a longitudinally corrugated sharpening member oval shaped in cross section projecting from the 1 base at an angle to the longitudinal axis of the finger piece, the latter being loosely held between the thumb and finger whereby the oval-shaped sharpening member is substantially free to present itself to varying beveled cutting edges of scissors blades.

3. A scissors sharpener including a' base, a finger piece carried by one side of the base and comprising a plate having opposite faces fashioned for gripping engagement by the thumb and finger,

the opposite side of the base being of stepped formation providing Walls in off-set planes, anddefining 'an intermediate angular shoulder, and a longitudinally corrugated sharpening 'member oval-shaped in cross section projecting from one of the walls in spaced relation to the shoulder and underlying the shoulder for a portion of its length. 7 I

GRANT HAMMONDQ

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