US1907870A - Sharpening device - Google Patents

Description

May 9, 1933. R. w. READER SHARPENING DEVICE Filed June 15 1952 Roberf Reader file/$0M- 561) ELM;

Patented May 9, 1933 UNITED STATES PATENT-f ROBERT w. READER, OF HARRISBURG, rENN'sYLvAnIA, ASSIGNOR TOUNEW, rGn'ron NOVELTIES, INCORPORATED, OF NEW R IGRT BENNSYLVANIA, A, CQRP TION OF PENNSYLVANIA SHARPENING DEVICE Application filed June 15,

This invention relates to a sharpening device for knives and other cutlery.

The object of the invention is to provide a very simple and eflicient device which can be manufactured cheaply in quantlty production.

' Other objects of the invention will become apparent as the detailed description thereof proceeds.

In the drawing:

Figure 1 is a perspective view of the invention as mounted upon a support and used for sharpening purposes;

Figure 2 is a plan view of the device;

Figure 3 is a vertical section taken on the line 33 of Figure 2;

Figure 4 is a perspective view of a blank in which the sharpening elements of the invention are mounted; and V Figure 5 is a perspective view of one of the sharpening elements. 7

As shown in the drawing, the invention comprises a frame 1 stamped out of resilient sheet material. This frame comprises a base 2 having side flanges 3 and 4 turned upwardly therefrom at substantially right angles to the base 2. The base 2 is provided with apertures 5 and 6 adapted to receive suitable fastening members such as nails or screws for securing the frame to a wall or other support when desired.

The side flange 3 is provided with tabs 7 and 8 adapted to be bent over the inclined edges9 and 10, respectively, of a sharpening element 11. The element 11 comprises a substantially triangular slab of abrasive material. This slab of material is provided with a broad flat base 12 adapted toseat squarely on the base plate 2. The side edges 13 and 14 extend upwardly at an angle from thebase 12 and merge into a hemispherical part 15. The flat base 12 cooperates with the tabs 7 and 8 in holding the element 11 securely positioned on the base 2 and against the inner face of the flange 3.

The side flange 4 is likewise provided with tabs 16 and 17 adapted to be bent over the inclined edges of a second sharpening element 11 similar in every respect to the sharpening element 11, previously described 1932. Serial No. 617,412.

as secured in the frame 1 by the tabs 7 and are interchangeable with each other, and

the side flanges 3 and 4 are shaped so as to conform somewhat closely to the outline of the sharpening elements. These sharpening elements and the frame 1 are so dimensioned that when the elements are properly positioned in the frame 1, as shown in the drawing, the two hemispherical parts 15 make point contact with each other and are held yieldingly in such contact by the inherent resilience "6f the sides 3 and 4 of the frame 1.

It is to be understood that the material of which the frame 1 is made shall possess suflicient resilience to hold the parts 15 of the elements Hand 11' in such pointcontact with each other throughout the sharpening operation of the device, as illustrated in Figure 1 of the drawing. It is to be noted that this device comprises three elements only; namely, the frame 1, and the two sharpening elements 11 and 11", which are held in position-in the frame 1 by the resilience of the frame and by the tabs formed integral with the sides of said frame.

It is evident that the frame can be stamped out of a blank by a single stamping opera tion, that the elements 11 and 11 can very readily assembled therein; and that the shape of the elements, corresponding to the shape of the side flanges 3 and 4 of the frame, enable these elements to be positioned in their frame very quickly and accurately. While I have described my invention as embodied in concrete form and as operating in a specific manner in accordance with the provisions of the patent statutes, it should be understood that I do not limit my invention thereto, since various modifications thereof will suggest themselves to those skilled in the art without departing from the spirit of my invention, the scope of which is set forth in the annexed claim.

What I claim is:

A sharpening device comprising a frame stamped out of a sheet of resilient material to form a substantially rectangular base plate, a pair of substantially triangular flanges extending from the opposite edges of said base plate and parallel to each other, a pair of substantially triangular sharpening elements each of which has a hemispherical part formed at its apex, and, has its base seated on said plate between said flanges and with said parts in yielding point contact with each other, said flanges including tabs bent over the sharpening elements to maintain them in position on said base plate;

In testimony whereof, I afiix my signature.

ROBERT W. READER.

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