US1165342A - Sharpener for rotary blades. - Google Patents

Description

J. M. PETERSON.

SHARPENER FOR ROTARY BLADES.

APPLICATION FILED FEB. 19. 1915.

1,165,342. Patented Dec. 21, 1915.

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JOHN M. PETERSON, OF CHICAGO, ILLINOIS, ASSIG-NOR TO'GEORG'E J. SAVER, OF CHICAGO, ILLINOIS.

SHARPENER FOR ROTARY BLADES.

Specification of Letters Patent.

, Patented Dec. 21, 1915.

Application filed February 19, 1915. Serial No. 9,235.

To all whom it may concern:

Be it known that 1, JOHN M. Pn'rEnsoN,

a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in Sharpeners for R0- tary Blades, of which the following is a full, clear, concise, and exact description, reference being had to the accompanying drawings, forming a part of this specification.

- My invention relates to sharpeners for rotary blades and is more particularly applicable to meat slicing machinery for instance where a large rotary circular blade is used to cut the meat into slices, which rotary blade must be periodically sharpened.

My invention has for its object the provision of grinding or sharpening mechanism for the blade, which mechanism is arranged close to the l'mife so that merely a slight movement of a fingerhold is necessary to place the sharpeners into condition to perform their work. The device is also more particularly designed to provide an extremely simple construction as I have found that by reducing the number of movements heretofore used I can construct such a device having a minimum number of parts.

My invention contemplates the provision of two sharpeners, one for the back of the knife and the other for the face of the knife arranged upon a swinging frame in such a manner that when the frame is swung the sharpeners are in engagement with the blade and when the frame is swung in the opposite direction the sharpeners are away from the blade." Merely a rotary movement is necessary to carry out allof the steps neces sary to place the sharpeners into sharpening position or remove them therefrom.

I will explain one form which my invention may take by referring to the accompanying drawing in which Figure 1 is a diagrammatic view of a slicing machine showing a side view of my improved sharpening device; Fig. 2 is a top view of the sharpening device; Fig. 3 is a sectional view on line a'a of Fig. 1; Fig. 4 is a sectional view on line 5-?) of Fig. 3, and Fig. 5 is a sectional view on line c0 of Fig. 4:. V

The rotary blade 1 is carried by the shaft 2 which is supported in the bearing 3. A foot 4: is mounted upon the bearing 3 and supports preferably a spindle 5 to which a carries a framework 9.

can be used as is readily apparent.

sleeve 6 is fixedly secured by the set screw 7 By referring more particularly to Fig. 3, it will be seen that the sleeve 6 can be set relative to the spindle 5 and then fastened so as to make the initial adjustment of the device relative to the blade 1. The sleeve 6 car ries a rotatably mounted spindle 8 which The spindle 8 as stated is rotatably mounted in the sleeve 6 and may be rotated by the fingerhold 10 which by means of its stem 11 is fixedly se cured to the spindle 8. The fingerhold projects out through a hollow casing 12 having at its outer extremity as seen more clearly in Figs. 4 and 5 an opening 13 so arranged that the stem 11 occupies either an alternate position to the right (Fig. 5) or an alternate position to the left and never occupies permanently the intermediate position in which it is shown in Figs. 1 and 5. A spring 1 1 normally pushes the spindle 8 upwardly so that the stem 11 is held out of the'two depressions forming part of the opening 13. It will thus be seen that the framework 9 can be rotated within the limits of movement permitted the spindle 11, the spring 14: always forcing the spindle into one or the other of its limiting positions. Of course no up or down movement of the framework need take place because the depressions of the opening 13 can be exceedingly slight or in fact other means for locking the stem 11 The framework 9 as stated carries a pair of sharpening devices 15 and 16 for the opposite faces of the knife. A hood 17 is also provided preferably to cover the said grinding devices. The grinding devices are rotatably mounted respectively on shafts 18 and 19 pivotally mounted in the sleeves or hubs 20, 21. Suitable springs 22 and 23 shown in dotted lines in Fig. 2 normally serve to equalize the pressure of the sharpening devices against the knife surface. Now whenever the fingerhold 10 is moved into one limiting position the sharpening devices 15 and 16 are away from the knife and whenever it is swung into its other limiting position the two grinding devices which are on opposite sides of the knife are swung against the knife (on opposite sides thereof).

, It will thus be seen that an exceedingly simple device is here provided for sharpening purposes for rotary blades which controls the position of the sharpening devices when against the blade and also controls and locks them out of operative positionwhen their use is not desired. Of course, a wider latitude of movement to the'stem 11 may be provided if the sharpeners are to be moved a greater distance away from the knife when in their inoperative position. This may be found necessary should the machine be used for cutting meat of such a character that particles thereof adhere to the surface of the knife in its rotary movement, it not being desirable that this adhering meat en gage the sharpening devices.

From what has been described the nature of my invention will be clear from the one form illustrated herein.

-What I therefore claim as new and desire to secure by Letters Patent is: v 1. A device for sharpening the rotary circular knives of meat slicing machines, comprising a rotatable framework, a pair of sharpening devices mounted upon said framework, a fingerhold for rotating said framework substantially in a horizontal frame to bring the sharpening devices into or out of engagement with the said knife, and means for locking said framework in both of its limiting positions.

2. A device for sharpening the rotary circular knives of meat slicing machines, comprising a rotatable framework, a pair of sharpening devices mounted upon said framework so as to be upon opposite sides of said knifejmeans for rotating said frame- 'work substantially in a plane to bring said sharpening devices into engagement with the said knife, and means for locking said framework in its limiting position.

3. A device for sharpening the rotary circular knives of meat slicing machines comprising a rotatable framework having a spindle, asleeve within which said spindle is rotatably mounted, a fingerhold for rotating said spindle, means associated with said sleeve for locking said fingerhold in its limiting positions, and a pair of sharpening devices respectively on opposite sides of said knife. mounted uponsaid framework.

l. A device for sharpening the rotary circular-knives of meat slicing machines comprising a rotatable framework having a spindle, a sleeve within which said spindle is rotatably mounted, a fingerhold for rotating said spindle, means associated with said sleeve for locking said fingerhold in its limiting positions, a pair of sharpening devices respectively on opposite sides-of said knife mounted upon said framework, and a spring acting against said spindle.

In witness whereof, I hereunto subscribe my name this thirteenth day of February A. D. 1915. l V JOHN M. PETERSON. 1 Witnesses: p

WM. ALCHAPIN, JOHN VVYMOND.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

' Washington, D. G. 1" i It is hereby certified that the name of the assignee in Letters Patent No. 1, 165,342,

granted December 15, 1915, upon the application of John M. Peterson, of Chicago, Illinois, for an improvement in Sharpeners for Rotary Blades, was erroneously Written and printed as George J. Saver, Whereas said name should have been Written and printed as George J. Sayer, as shown by the records of assignments in this office; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 15th day of February, A. D., 1916.

[SEAL] R. F. WHITEHEAD,

Acting Commissioner of Patents. 01. 51-7.

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