US487552A - Sickle-grinder - Google Patents

Description

(No Model.) L

G. J. GLIN'E. SIOK'LE GRINDER.

. No. 487,552. Patented nem 1892.

V M-W NITE STATES PATENT Erica GEORGE J. cum, on GOSHEN, INDIANA.

SICKLE-GRINDER.

SPECIFICATION forming part of Letters Patent No. 487,552, dated December 6, 1892.

Application filed March 25. 1892.

To all whom it may concern;

Be it known that I, GEORGE J. OLINE, a citizen of the United States, residing at Goshen, in the county of Elkhart and State of Indiana, have invented certain newand useful Improvements in Sickle-Grinders; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to a machine for grinding and sharpening sickle-bars of mowing and harvesting machines; and the novelty consists in the combination of devices and peculiar construction and arrangement of parts, as will be hereinafter fully described and claimed.

The invention is fully illustrated in the accompanying drawings, forming a part of this specification, in which-- Figure 1 is a perspective view of my improved sickle-grinding machine, and Fig. 2 is a vertical central sectional view thereof.

Like letters of reference denote corresponding parts in all the figures of the drawings, referring to which- A designates the base or platform on which is mounted the upright flexible standards 13 B, adapted to support the adjusting and controlling devices for the grinding-stone 0. At one side of the standards B B, and near one end of the base or platform, are arranged the adjustable guides D D for the work or sickle bar represented at E, and F is a clamping-1ever pivoted atf to the base and having a pro jecting flange f, adapted to take over and hold the work in place.

The standards B B are made of metal and have the feet I), which are securely bolted to the bed or platform, and in the upper ends of the standards is journaled a rock-shaft G, which is free to turn in its hearings in the standards and which is provided at one end with a lever G, which is keyed or otherwise rigidly fastened to the rock -shaft and by which the latter is rocked when it is desired to withdraw or feed the grinding-stone. This grinding-stone C is in the form of two cones with their bases placed together to adapt the stone to enter the V-shaped openings between the inclined knives on the sickle-bar, and through said stone passes an arbor 0,

Serial No. 426.407. (No model.)

which has its ends journaled in hearings in a depending support H. This support consists of two longitudinal bars h h, of metal, which are bent at intermediate points of their length, as at 7t, and the bars are arranged so that the bent portions h h diverge laterally from each other, whereby the upper ends of the bars are brought into parallel positions and the lower ends of said bars are likewise parallel with each other, although the lower parallel ends of the bars are spaced farther apart than the upper parallel ends of said bars. The widely-spaced lower ends of the support-bars are adapted to receive the grinding-stone between themselves, and at the ends of the stone O are the face-plates c, by which the friction and wear is taken up which might otherwise come on the ends of the stone, caused by the latter riding against the inner faces of the bars h h of the support H.

I is a sectional carrier which is made in the form of a block, consisting of two pieces I 1 which are laid one upon the other, and the inner faces of the sections of this carrier are conveniently grooved, as at i '5. One of the grooved ends of the sectional carrier is fitted around the rock-shaft G, and the other grooved end of said sectional carrier is similarly fitted around the power-shaft J of the machine, and this sectional carrier is securely clamped on the rock-shaft and power-shaft by means of the tension-bolts jj, which pass through apertures in the carrier between the two shafts, and which serve to bind the carrier-sections so firmly on the shafts that the carrier moves with the rock-shaft when the latter is rocked.

The upper ends of the bars 72 h of the depending support are fitted loosely on the power-shaft on opposite sides of the carrier I, so as to bear against the edges of the same, and the bars are drawn toward each other so as to bind laterally against the carrier by means of a horizontal tension-bolt L, which passes through aligned openings in the bars h h, below the carrier, and has a thumb-nut k at one end, by which the necessary frictional contactof the bars on the carrier can be secured to maintain the depending support and the grinding-stone at the proper angle or positions. Below the tension-boltL and between the parallel upper ends of the bars h h is arranged the distance-block K, which is held in place by means of pins or bolts 7r, and which serves to limit the inward movement of the bars h it toward each other and to prevent the same from binding on the face-plates of the grinding-stone with too great force. This distance-block also serves to limit the inward adjustment of the depending support toward the standards B B as said block abuts against the outer end of a horizontal stop-bar 1 fixed or bolted to one of the uprights and arranged in the Path of the distance-block.

The upper ends of the standurds B B are adapted to be forced into contact with the edges of the carrierI in order to increase the friction on the carrier and assist in holding the latter from displacement by the weight of the support and the stone, and such contact of the standards and carrier is effected by a horizontal tension-bolt M, which connects the two standards below the rock-shat t, and which has an adjusting-nut m.

The depending support is normally drawn toward the standards, and the stone is held out of contact with the sickle-knives by means of a coiled spring N, having its ends connected to the tension-bolts L M of the pendent support H, and the standards B B, respectively. (See Fig. 2.)

The end of the power-shaftis extended beyond the machine and receives a power-wheel O, which is rigid with said shaft, and this power-wheel has a crank 0, by which the wheel and shaft can be rotated by hand. The arbor c of the grinding-stone is similarly extended at one end and has a toothed wheel 12 rigid therewith, and said power-wheel is adapted to rotate the toothed wheel 19 and the grinding-stone thereon, for which purpose the two wheels may be provided with gearteeth to mesh directly together.

In operation,the lever G is turned to raise the outer end of the carrier I, and thus lift the pendent support 11, so that the tensionspringwill draw the pendent support inward toward the standards until the distance-block comes in contact with the stop-bar 1 The work having been adjusted on the bed against the guides and fixed in place by the clamping-lever, the crank 0 is turned in the direction indicated by the arrow in Fig. 1, and thereby forces the pinion and grinding-stone outward until the stone contacts with the V- shaped edges of the knives on the sickle-bar, the pendent support H moving outward with the stone and the spring being distended, as is obvious. The continued rotation of the powerwheel turns the stone to grind the knives and feed the stone to the work, and when the knife has been ground properly the wheel is stopped, the lever G operated to raise the carrier and support, and the sprin g assists to return the support and the stone to position, where the latter is out of the way in adjusting the sickle-bar on the bed or platform. When the carrier or the support II becomes too loose on the shafts G J, so as to improperly support and hold the stone to the work, the tension-bolts can be adjusted to increase the friction-between the parts and cause the same to remain in position and to only move when sufficient power is applied normally to the lever or crank to overcome the frictional resistance of the parts.

I am aware that changes in the form and proportion of parts and details of construction can be made without departing from the spirit or sacrificing the advantages of my invention, and I therefore reserve the right to make such modifications as fairly fall within the scope of my invention.

Having described my invention, what I claim is- 1. In a sickle-grinding machine,the combination of the uprights or supports, the carrier pivoted thereto, a power-shaft journaled in the carrier, the pendent support having its separate laterally-divergent bars fitted on the power-shaft and provided with the transverse tension-bolt and the distance-block, which is confined in place between the bars, and the grindstone journaled in the lower spaced ends of the support-bars and has its shaft geared to the power-shaft, substantially as described.

2. In a sickle-grinding machine, the combination of the compressible uprights or standards connected by the tension-bolt, a rockshaft journaled in the standards, a powershaft, the sectional carrier fitted on said shafts between the ends of the standards and having the draw-bolts to positively clamp the sections of said carrier around said shafts, the pendent support having its bars fitted on the power-shaft on opposite sides of the carrier and provided with the transverse tensionbolt, and the grinding-stone journaled in the support and geared to the power-shaft, substantially as'described.

3. In a sickle-grinding machine, the combination of the standards, a pivoted carrier, the power-shaft journaled therein, the pendent support comprising the separate bars or straps having the distance-block connected between them, and the tension-bolt K, having the adjusting-nut at one end, the tension-spring connected to the standards and the pendent support, the stop-bar rigid with a standard and arranged in the path of the distance-block, and a grindstone carried by the support, substantially as described.

In testimony whereof I aflix my signature in presence of two witnesses.

GEORGE J. OLINE. Witnesses:

T. A. GILMORE, J. A. BEANE.

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