US1938928A

US1938928A - Device for sharpening knives or the like

Info

Publication number: US1938928A
Authority: US
Inventors: Ray D Parsons
Original assignee: Individual
Current assignee: Individual
Priority date: 1932-05-05
Filing date: 1932-05-05
Publication date: 1933-12-12
Anticipated expiration: 1950-12-12

Description

Dec. 12, 1933. R. D. PAP'soNs DEVICE FOR SHARPENING KNIVES OR THE LIKE Filed May 5, 1932 INVENTOR. Rg. FHREUNE BY A TTORNE Y.

Patented Dec. 12, 1933 UNITEDl STATI-:s

. 1,938,928' y y Y kDevice Fon snAnrnnlNG KNIVES on nl Y THE LiKE v Ray D'. Parsons, Eldora, Iowa Y.

Application May s, 21932. .serial No. 609,432 y 4 Claims. (c1. ze-86) The principal object of my invention is to provide an eflicient strong Sharpener for cutlery cr the like that will successfully and evenly sharpen and bevel bothsides of thecutting edge at the same time.

A further object of this invention is to provide a. device for the sharpening of knives or the like that may be easily and quickly adjusted to give various bevels to the cutting edge.

if) A still `further object of my invention is'to provide a Sharpener for cutlery that quickly sharpens a blade or like by natural movement of the same through' the Sharpener. Y

A still further object of this invention is'to provide a Sharpener for-cutlery or the like that has easily removable sharpening bars.

Still further objects of my invention are to provide a device for sharpening knives and the like thatis economical in manufactura' durable in use and safe in operation.

These and other objects will be apparent to those skilled in the art.

Myinvention consists inthe construction, arrangement vandY combination of the various I parts of the device, whereby the objects contemplated are attained as hereinafter more fully set forth, pointed out in my claims and'illustrated in the accompanying drawing, in which:

Fig. 1 is a side viewl of 'my complete invention readyrfor use. i i f Fig. 2 is a top plan view of` my sharpening dev1ce. x

v Fig. 3 is a rear end View ofthe device' andY shows an angle at which the 'cuttingwbars may be adjustably set relative to. eachother.

Fig. 4 is aA front end viewoffthe complete Viii-- vention-and shows the'position 'of the sharpening bars when a comparativelyblunt cutting edgefis desired.

Fig. 5 is a cross sectional View of the invention taken on line 5-5 of Fig. 2 and more fully illustrates the construction of the invention.

Fig. 6 is a cross sectional longitudinal view oi the sharpening bars or files taken on a line Where these two members come in close proximity to each other.

Fig. 7 is a side plan view of a portion of one of the file bars showing the curved construction of its cutting surface for delivering the diagonal cut to the bevel of the blade to be sharpened.

There are many cutlery sharpening devices on the market but the chief objections to these devices are that they are hard and dangerous to operate and do not evenly bevel both sides of the instrument to be sharpened.

'as shown in Fig. 1.

jaw 14 is a cutting bar 21. gages and rests upon the inner face of the jaw 15.

Furthermore these devices unevenly sharpen the length`of the blade. I Yhave overcome such disadvantages by providing a device capable of easily and accurately beveling a blade through'n out its entire longitudinal length.

Referring to the drawing I have used the numeral 10itovdesignate the base lportion of'the invention. Thisbase portion is in the form of an' elongatedstrip of metal having its front end portion 11 bent vertically upwardly and its 65 rearv4 end portion 12-bent verticallyl downwardly, The numeral 13 designates a fiat end Amember secured by any suitable means to the outside of the portion 12. This member 13 extends upwardly beyond the plane 'of the 70 base member. 10 and is parallel with the portion 11. The numerals 14 and 15 designate two spaced apart straight jaw members. These jaw members 14 and 15 which are of metal bar construction are pivoted at the lower portion of each of their ends to the members 11 and 12,asshown inthe drawing. By this arrangement vthe upper numerals 16 'andl17 designate two rod ends eX 80 tending toward the central portions of the two jaw members '14 and 15, respectively, as shown in Fig. 5. These members 16 and 17 are secured by any suitable' means to the central portion of the member 10. 'Threaded onto the free .end 85 portions of each of the members 16and 17 is an elongated nut 18 having its outer endportion rounded for engagement with ther outer 'side of one of lthejawmembers. By this construction, the rotation.. of the nutslS willA adjustably'posi'- 90 tion the'two jaw=memb`ers 15 and 14 relative to each other. The numeral 19 designates a notch cut in theportion 11 and in line with the space between the two jaw members. The numeral 20 designatesv a similar notch cut 95 in the portion 13, as shown in Fig. 3. These notches permit the instrument to be. sharpened to be placed and drawn between the two jaw members 14 and 15.- Resting on the inner side ofthe These sharpening bars may be in the form of y cutting les, such as shown in Fig. 7 and having their cutting edges of curved construction for delivering the diagonal cut to the bevel of the blade as the'same is pulled between them. For best results it is recommended that these curved cutting edges ofthe two

members

21 and 22 be staggered relative to each other, as shown in Fig.

6. Such a positioned arrangement not only more 'i-J A similar bar 22 en- 100 successfully bevels the blade to be sharpened but encourages the blade to seek the dead center bottom line between the two members and eliminates excessive downward pressure on the blade being drawn longitudinally on the blades between the

members

21 and 22.

In Fig. 1 I show an instrument such as a'knife 23 being drawn between the two

members

21 and 22 for sharpening purposes. In each of the jaw members 14 and 15 are two spaced apart transversely extending slots'24. Extending through each of these slots 24 is a cap screw 25 threaded into the sharpening bars, as shown in Fig. 2. The lengths of these cap screws are such that their forward ends do not pass beyond the inner side of the bar to which they are threaded. By this arrangement the bars or

les

21 and 22 may be adjustably positioned and held relative to each other.

By placing one of the bars lower than the other .as shown in Fig. 5, a desirable Vresult is obtained. Also the bars or les may be changed relative to each other to provide new wearing surface. By the cap screws 25 being threaded into the central line portion of the

members

21 and 22, those members may be completely turned and positioned so that theirl lower side edges become theirtop side edges. Also 'by making both sides of the members 2l and 22 cutting sides, as shown in Fig. 6, they may be rotated to give additional cutting and 'wearing surfaces. By such an arrangement a tool of long life is assured. After the members 21 rand 22 have been desirably positioned, the cap screws 25 should be tightened to rigidly hold the members against accidental and undesirable vertical movements made possible by the slots 24.

One of the desirable advantages of the construction of my device is that it need not be clamped to a supporting surface. By providing the downwardly extending end 12, a hook portion is provided which may be positioned over the edge of a table `or supporting surface. As the instrument 23 is drawn away from the end 12,

`there is no possibility of undesirable movement of the tool. f

By rotating the nuts 18, the jaws 14 and 15 supporting the bars may be adjustably positioned relative to each other for obtaining vvarious desirable bevels on thercutting blade. Due to the rugged construction of my invention vit may be successfully used to sharpen heavy instruments such as meat cleavers and the like.

From the foregoing it will readily be appreciated that I have provided a verydesirable instrument for the successful beveling and sharpening of cutlery.

Some changes may be made in the construction and arrangement of my improved device for ycentral portion of the other jaw, and a nut sharpening knives o'r the like without departing from the real spirit and purpose of my invention, and it is my intention to cover by my claims any modified forms of structure or use of mechanical equivalents which may be reasonably included within their scope.

I claim:

1. In a device of the class described, a base member, two jaws pivoted at their lower end portions to said base member, a sharpening bar resting on each of said jaws, a rod secured to said base member and extending toward the central portion of one of said jaws, a second rod secured to said base member and extending toward the threaded on each of said rods capable of engaging the jaw adjacent to it.

2. In a device of the class described, a base member, two jaws pivoted at their lower end portions to said base member, a sharpening bar resting on each of said jaws, a rod secured to said base member and extending toward the central portion of one of said jaws, a second rod secured to said base member and extending toward the central portion of the other jaw, and a nut member having a rounded end threaded on each of said rods capable of having its rounded end engaging the jaw adjacent to it.

3. In a device of the class described, an elongated base member having a downwardly extending hook portion at one end, two elongated jaw members each hingedly secured at' its lower side to said base member extending longitudinally to the edge of the instrument to be sharpened and parallel of the longitudinal axis of said elongated base member, a sharpening elongated bar member secured on the innerside of each of said jaw members and extending parallel with the jaw member to which it is secured, a rod secured to said base member and extending toward the central outer portion of one of said `jaws, a second rod secured to said base member and extending toward the central outer portion of the other jaw, and an elongated nut threaded on each of said rods capable of engaging the jaw adjacent to it.

4. In a'device of the class described, aV base member, two jaws pivoted at their lower portions to said base member, a sharpening bar resting on each of said jaws, a rod member and adjusting nut thereon extending between said base member and the central portion of one of said jaws capable of adjustably positioning the jaw at various positions relative'to vsaid base member, andV a second rod member and adjusting nut thereon extending between ythe base member and the centralportion of the other jaw capable of adjustably positioning-that jawv at vvarious positions relative -to said base member.

' RAY D. PARSONS.