US64817A - Improvement in machines foe geinding the cutters of harvesters - Google Patents

Description

H. WHITALL. MACHINE FOR GRINDING CUTTER-SOP HARVESTERS.

No. 64,817. Patented May 14, 1867.

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'13 ENRY WHlTALL, or- W oonBUR-r, NEW: JERSEY Letters Patent No. 64,817, daterl'M'ay T4, 186?. l

IMPROVEMENT IN ll/IAGH IliIzlS FOR GRINDING THE GUTTI 'ERS OP HARVEST EBS.

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TO ALL WHOM IT MAY CONCERN.

Be it known that I, HENRY WIIITALL, of Vt'oodbury, New Jersey, have invented an improved Machine for Grinding the Gutters of Harvesters and I do hereby declare that the following-is-a full and exact description thereof. I I W The object of my invention is to provide a small, cheap, portable machine for grinding the cutters of harvesters and mowing machines, which may be easily carried by hand into the field by the operator of the mowing and reaping machine, and which may be readily applied to the same to grind thecutters' without taking them out of the machines The only means now in use for sharpening such cutters is. the common grindstone: When they become dull the cutter-bar must ,be disconnected. from the connecting-rod of the machine andbe withdrawn from its position therein, or, as is doue'in some cases, the cutters are detached from the bars by removing their screws. They are then carried from the field to the house,;or where the grindstone is to he found, upon which they are ground in the ordinary manner of grinding tools by hand, which commonly requires the labor of two persons, one to hold them on, the other-to turn the stone, 0. very tiresome, tedious, and time-losing practice. It is also quite diflicult to grind them truly in this manner, as few such grindstones are provided with rests orgauges to determine the proper relative inclination of the bevelled edge of the cutter to'theface of the stone, without which it is extremely difficult to do the. work well. In consequence of these difficulties in the way of properly and readily sharpening the cutters they are generally allowed to run until they get very dull, causing much greater labor for the horses, and doing the work in-a much less satisfactory manner.

Now-,niy invention is intended to overcome thcse diificultics, and is arranged so it may be applied to any machine, at any time when the, cutters have become-dull, (or when it is desirable to let the horses stop a short time for, rest,-) in such amanner that the edges of.the cutter may be ground uniformly upon the same angle without any material variation, and-requiring only one person to do it without loss of time in removing the cutters from the machine. 1

The principal features of my invention arev First. Arranging the stone orvulcanite wheel'upon a sliding frame that shall be'made' to traverse back and forth from front to rear of the cutters in line with and at the same time that the peripheryof the stone is made to-rcvolvc against the cutting edge. v v 2 Second. Arranging the mandrel ofthe stone upon the said sliding-frame at such an. angle that when in working position it shall be in a verticahplancparallel with the cutter-bar. 1 Y i I Third. Arranging the support of the said sliding frame upon an axis upon which it mayoscillate sons to present the stone to either edge of the cutter, and providing' 'foradiusting thesame so that the face of the stone shall be parallel with the bevellededge of the cutter. 4 7

Fourth. Arranging the horizontal support of the oscillating frame upon its vertical supports in' such a manner that the sliding frame may be adjusted so as to movein a line parallel with either edgeof the cutter, and also in a horizontal plane parallel with the surface of the cutter. V

Fifth. The arrangement of a clamp whereby the grindingmachine is readily-clamped securely to the ground and to the harvester or mowing machine when the cutters are to be ground.

Having thus generally described the nature and object of my invention, I will now proceed to describe more particularly the construction and operation of the-same fference being h to the pa y g draw; ing, in whichi I Figure 1 represents. a perspective view of my machine in position to grind thecutters on one edge with the cutter-bar in the harvester ready for use. I

Figure 2 is a perspective view of the clamp.

Figure 3 is a sectional view of one of the sleeves 0, showing the annular groove 7:.

Figure 4 is a section of one of the sleeves and posts, showing the screwf and nut 2'.

A and A are base-plates to which the hollow slotted posts B and B are secured. C and C are sleeves made to slide vertically on the said posts by means of screws f and nuts 2'. The nuts project through slots in the posts and into annular grooves k in the sleeves C, or in place of the screws f and nuts 2' the sleeves may be adjusted by hand and secured by set-screws Z 1. Each sleeve has a projection extending horizontally from one side. I) is a bent support or frame jointed at each end 'to one of the sleeves by means of said projections. E is an oscillating frame pivoted by screws a and a to the support D. F is a sliding frame to which the shafts g and h are secured by journal boxes 6 and Z1 and c and c. I is a long screw secured at bot-h ends to the oscillating frame E. j is a worm on shaft g, which communicates motion to a werm-wheel-(n0t seen) which revolves in and is secured to nut J on sliding frame F. The said worm-wheel has a screw hole through its centre, through which the screw I passes. G and H are gears to communicate'motion to shaft ii. M is the stone or vulcanitewheel arranged upon the sliding frame at such an angle us will cause the sides of the stone to stand in a line at right angles with the cutter-bar of the mowing machine. L is a plate projecting downward from the front end of the main support D, having a curved slot, 1):. K is a set-screw passing through the slot m, and screwing into a boss upon the cross-bar of the oscillating frame E. we 0 and e represent the fingers'ot' a mowing machine. d d d and 01 represent the cutters of the same. P represents a clump, of which 12 is a ,lever having aehain, attached to its short arm, and another chain, .9, attached 16 its long arm, and i fulcrum supported in the grooves in the stock of the clamp adjacent to the mortise.

The operation is as followsi The cutter-bar having been adjusted so that each one of the edges of all the cutters upon the same side is presented about midway of the spaces between the fingers, the base-plate A is then placed upon the ground in from. of the ruttcr-barand parallel with it. The base-plate A is placed in a similar manner upon the machine directly in rear of the cutters. They are then adjusted so that the oscillating frame will stand in a line parallel with theedge of the cutter which is to be ground. The clamp P is then placed .with one foot upon base-plate A, and the other on plate A" in such a position that the hook q may be secured to one of the fingers when thelongarm of the lever is drawn down by the chain a, and secured to a pin in the beam of the said clamp with suflicient force to secure the base-plates A and A firmly in their places. The oscillating frame'E is then adjusted upon its axis so that the face of the stone on the under side is parallel with the bevelled edge of the cutter. The said frame is secured in this position by tightening up set-screw k. The sleeves C and C are then adjusted by the screws f or the set-screw Z, so that the sliding frame and oscillating frame are brought to a position parallel with the surface of the cutter, and at the same time the stone is made to bear on the cutter with suiiicient force to perform the grinding of the same, when the operator, by applying motion to the crank on shaft ,7 will cause the stone M to rotate and move in one direction until it has reached one end of the eutters edge, then by turning the crank in the opposite direction the stone will also traverse in an opposite direction, this operation being repeated until the cutter is sufiiciently sharpened. The clamp is then released, and the machine adjusted to the corresponding edge of the next cutter, and the same operation is repeated until all the cutters are sharpened upon one edge. The cutter-bar is then adjusted so that the opposite edges of the cutters are in the proper position between the fingers, and the base-plates A and A are placed so as to adjust the sides of the oscillating framev in a line parallel with the edges oppcsite to those already'ground, when, the set-screw K being loosened, the oscillating. frame E is turned a half revolution on its axis, which will bring the grindstonc in the same positionrelatively to the unground edges of the cutters. The operation is then proceeded with in the same manner as above described. In consequence of the faces of the stone being presented to the cutters at right angles to the cutter-bar, the stone ill work closely into the angle between the cutters where they come together. I

Having thus fully described my invention, what I claim and desire to secure by Letters Patent, is-- 1. .A portable machine adapted to grind the cutters of mowing and reaping machines, when arranged and operating substantially in the manner described 2. In combination with a machine constructed substantially as described, I claim the clamp P when arranged for joint action with the said machine as and for the purpose described.

In testimony whereof I do hereby subscribe my name this twentieth day of February, one thousand eight hundred and sixty-seven.

HENRY WHI'IALL.

Witnesses;

Emu. F. BROWN, 0. Bssroa.

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