US374782A - Hugh dick - Google Patents

Description

(No Model.)

H. DICK.

DEVICE FOR SHARPENING HARROW DISKS.

Patented Dec. 13, 1887.

IJV'V'ENTOR WITNESSES N, PETERS. Fholo'Lllhogmphar. Washingmn U, C,

.NITED STATES PATENT OFFICE,

HUGH DICK, or THREE MILE BAY, NEW YORK.

DEVICE SHARPENING HARROW-DISKS.

SPECIFICATION forming part of Letters Patent No. 374,782, dated December 13, 1887.

(No model.)

To all whom it may concern:

Be it known that I, HUGH DICK, a citizen of the United States, and a resident of Three Mile Bay, in the county of Jefferson and State of New York, have invented certain new and useful Improvements in Devices forSharpening Pulverizer Wheels or Disks; and I do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same, reference being had to theaccompanyingdrawings, which forina part of thisspecification, andin which- Figure 1 is a side view of my improved device or tool for sharpening pulverizer wheels or disks, showing the same in its operative position. Fig. 2 is aperspective view of the device or tool, and Fig. 3 is a similar view 1 taken at right angles to Fig. 2.

, they are mounted and without takingthe pu'l- These parts are introduced in the drawings in A is flattened and formed with a transverse semicircular recess, E, as shown, and on each side of this recess is arranged a turn-button,

F F, these turn-buttons being formed each with a threaded stem or shank, F F, which fits and turns in a threaded opening in the body A at those points, these turn-buttons being adapted topass through end slots, H H, in the end portions of a casting or box, I, which is made flat, and is formed at the central point of its inner side with a semicircular recess, .J, adapted to register with the semicircular recess E of the body A. My improved tool or sharpener is placed in operative position on the shaft aof aharrow or pulverizer to sharpen the rotary disks of the pulverizer without removing the said cutting-disks from the machine or harrow by placing the tool or body A close to the side of the rotary disk I), with the shaft a resting in the semicircular recess E and the hooked inner end of the tool extending over the edge of the circular disk, so that the inner end of the adj usting-screw IE will come in contact with what may be called the inner face or concave side of the circular disk, when the tool is secured in operative position on the barrow-shaft a by placing the box or casing I on the other side of the harrow shaft, so that the other side of the said shaft will be inclosed in the semicircular recess J in the inner side of the box I, the heads of the turn-buttons F F being turned so as to pass through the end slots, H H, of the box or hearing I when placing the box I in position, and the buttons are then turned for a half-turn, so as to effectually secure the box Iin position and hold the sharpener firmly in its operative position on the barrow-shaft.

I prefer to construct the turnbuttons as described, with the threaded stems or shanks fitting in threaded apertures in the body A, as by means of thisconstruction the buttons can be adjusted, screwed in or out, so as to suit any size of barrow-shaft, so that shafts of varying diameter can be inclosed between the bearing I and the side of the body A, and the tool is thus made adaptable for any harrow or cultivator using circular cutting-disks.

Below the turn-buttons F the body A is formed with a longitudinal slot, K, as shown, and the adjustable knife block orsbearingL is adjustably secured to this slotted portion of I00 which passes the end of a screw'bolt, N, having a head at one end, and passing through the .upper end or part of the body-slot K and or shank S of the sharpening-blade S, the said stem being square or rectangular in cross-section to fit the slot L and to prevent it from turning therein. The outer longitudinal operative edge of this blade is beveled and sharpened, as shown, so that one end or point is higher than the other.

The tool having been secured on the harrowshaft, as described, and shown in Fig. 1 of the drawings, the knife-block L, carrying the sharpening-knife S, is then adjusted either nearer to or farther from the shaft or center of the disk to be sharpened by loosening the nuts of the end screws of the knife-block and moving the said screws with the block either up or down in the slot of the body A, by which means thesharpening-knife S can be adjusted to suit a disk of any size, according to the diameter of the said disk.

The knife-block having been thus adjusted up or down on the slotted body A, the nut at its upper end is tightened to secure the block at that point of the said longitudinal slot K, and the lower end of the knife-block is then adjusted or moved to either side, turning on the upper screw-bolt, N, as on a pivot, to adjust the angle of the cutting-blade according to the curvature of the disk to be sharpened, moving thelower slotted end of the knife-supporting block L toward the disk giving a shorter bevel, while moving the said end away from the disk will give a longer bevel to the cutting-edge of the disk, as will be readily understood by reference to the several views of the drawings, especially Fig. 1 thereof, and when the proper angle of the cutting-blade has been secured the lower end of the knifeblock is secured in its adjusted position by tightening the nut of the lower screw, which passes through the transverse slot in the lower end of the knife-block, a washer being preferably placed between thesaid nut and the outer surface of the slotted lower end of the nut, as shown.

By adjusting the set-screw or adj ustingscrew E in the extremity of the curved end of the tool,the inner end of this screw bearing against the concave face of the disk, and also by adjusting in or out the sharpening-blade, which is secured in position in the knife-block adjustably and removably by means of a set screw, 8, the precise angle of the cutting-edge of the blade S with reference to the disk to be sharpened can be accurately adj usted, as will be readily seen. By means of the adjustable set-screw E and the adjustable sharpeningblade the tool may be applied to or on the shaft of any harrow and be used without coming into contact with the boxes between the several disks or bearings and at the point where the tongueis attached.

When the tool has been secured on the shaft and the several parts adjusted, as described, to give the proper angle to the cutting or sharpening edge of the blade S, the tool is operated by reciprocating it by means of its rounded end handle, B, reversing or drawing it back at the end of each stroke, the beveled and sharpened end or edge of the blade S cutting or sharpening on each back-stroke.

The end disk on the shaft is sharpened on its inner side by adjusting the sharpener'on the shaft on the inner side of the said disk,'

and by reversing the sharpening-blade S in the adjustable knife-block the inner side of the edge of the end disk can be readily sharpened, as will be readily understood.

From the foregoing description, taken in connection with the accompanying drawings,

' the construction, operation, and advantages of my invention will be readily understood.

It will be seen that my new and improved tool or implement for sharpening harrow or pulverizer wheels or disks is simple and strong in construction, and can therefore be manufactured at a comparatively small cost, and will not be liable to break or get out of order. It is exceedingly effective in operation, and by its use every farmer can sharpen the cuttingdisks of his harrow or pulverizer without removing the said disks from the shafts of the harrow and without taking any part of the harrow apart, thus avoiding the great expense of removing the disks and taking them to a machine-shop to be sharpened.

It will be seen that the sharpening-blade can be adjusted to suit disks of any size or diameter, and that its angle can be nicely and accurately adj usted to sharpen the cutting-edge of the disks to the desired bevel.

Having thus described my invention, what I claim, and desire to secure by Letters Patent of the United States, is-

1. The combination ofa bar or body,one end of which is formed into a handle, and asharpening-blade secured to the bar, said bar being adapted to be secured to the shaft of a disk harrow and the blade adapted to engage with the periphery of the disks.

2. The combination of a slotted bar or body adapted to be secured upon the shaft of a disk harrow, a knife-block adjustably secured to the slotted portion of the bar, and a sharpening-blade secured in said block.

3. The combination of a slotted bar or body adapted to be secured upon the shaft of a disk harrow, a knife-block adjustably secured to the slotted portion of the bar, one end of which is provided with a perforation and the other end with a transverse slot, bolts through said bar and said block, and a sharpeningblade secured in said block.

4. The combination of a bar or body portion adapted to be secured upon the shaft of a disk harrow, a knifeblock secured thereto, provided with a slanting transverse slot, and

5 asharpeningblade having a rectangular shank secured therein. V

5. The combination of a bar or body adapted to be secured upon the shaft of a disk harrow, one end of which is formed into a handle and 10 the other end is curved inwardly, a set-screw in said curved portion, and asharpening-blade secured to the bar near the handle and adapted to engage with the periphery of the disks.

6. The combination of a. bar or body having a semicircular recess near one end, and alsovr 5 with two perforations, a box having a slot at each end and a semicircular recess at its middle and two turnbuttons through the perforations in the bar and through the box and a sharpening-blade secured to the bar between 20' the box and one end of the bar.

In testimony that I claim the foregoing as my own I have hereunto affixed my signature in presence of two witnesses.

' HUGH DICK.

' Witnesses:

L; D. DANBY, J OHN VAN WoERT.

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