US434124A - Necticut - Google Patents

Description

2 Sheets-Sheet 1.

W. S. WILLIAMS.

REAPING MACHINES.

Patented Aug. I2

\\I la/// j m .1. Il imElI-IJ J I 4 m. @l l Il lU-l A IIIIIIIII (No Model.)

GRINDER IOR FINGER BARS AND SIGKLE BARS POR MOWING AND (No-Model.) 2 Sheets-Sheet 2.

n W. s. WILLIAMS. GRINDRR FOR FINGER BARS AND SIGKLE BARS FOR MOWING AND REAPING MACHINES. No. 434,1251. Patented Aug. 12., 1890.

UNITED STATES PATENT LOE-FICE. y

WILLIAM S. VILLIAMS, OF EAST HARTFORD, CONNECTICUT, ASSIGNOR TO THE VILLIAMS BROTHERS MANUFACTURING COMPANY, OF CON- NECTICUT.

GRINDER FOR FINGER-BARS AND SlCKLE-BARS FOR MOWING AND REAPlNG MACHINES.

SPECIFICATION forming part of Letters Patent No. 434,124, dated August 12, 1890. y

Application filed July 31, 1888. Renewed February 24, 1890. Serial No. 341,400. (No model.)

` of East Hartford, in the @Oum-,y of Hartford and State of Connecticut, have invented certain Improvements in Grinders for Finger- Bars and Sickle-Bars for Mowin g and Reaping Machines, of which the following is a specification.

The cutting mechanism of mowing and reaping machines consists of a stationary bar provided with guard fingers having Xed blades known as ledger-plates therein, and of a reciprocating sickle-bar having triangular knives, which pass through the guardiingers over the ledger-plates.

The aim of my invention is to provide a machine by which the ledger-plates may be rapidly ground and sharpened at their edges While in place on the inger-bar, and to adapt the same machine for the grinding of the knives of the sickle-bar.

My machine comprises a frame with a rotary grinding stone or Wheel, peculiar adj ustable supports for the parts to be ground, and mechanism for automatically moving the rests to and from the wheel when the machine is in action.

In the accompanying drawings, AFigure l is a side elevation of my machine. Fig. 2 is a top plan view of the same. Fig. 3 is a section -on the line w a: of Figs. l and 2. Fig. 4 is a front elevation of the rest or support for the nger-bar. Fig. 5 is a top plan view of the same. Fig. 6 is a top plan view of the rest employed in grinding sickle-knives. Fig. 7 is a side elevation of the same. Fig. 8 is an edge View of the same.

In constructing my machine I forni or secure upon a suitable base A a standard B, having at its upper end bearings to sustain a horizontal shaft C, which is'provid ed at one end with a hand-crank D, and near the other end with a beveled gear-wheel E. This gear I engage with a smaller gear F, secured on a second horizontal shaft G, carrying a grinding-wheel H of emery or other suitable material. The grinder-shaft G is sustained in the standard B and in a second standard A',

rising from the base, whereby the grindingwheel is accurately guided in its rotation while receiving a rapid motion through the intermediate gear from the crank. Upon the base opposite the edge of the grinding-wheel I locate a plate I, slotted, and secured by a bolt .I passing through the slot, so that it may be moved to and from the wheel.

K represents an upright round post mounted between ears t' on the plate I, and connected thereto by a horizontal supporting-pivot t',

so that its upper end may swing to and from the wheel. The lower end of the post has a rigid arm k carried toward the stone and bent at its end at a right angle to forma crank or wrist 7c', which is connected by a pitman 7a2 to a crank-pin 7c3 on the end of the shaft C, whereby the post K is given a constant vibration to and from the stone.

On the upper end of the vibrating post I mount a sleeved plate L, which may be revolved or adjusted vertically thereon at will. It is sustained by a pin 7c* seatedin one of a series of holes in the post and changeable from one to another at will. This pin, by encountering the walls 705 of a notch in the lower end of a sleeve, limits the rotary motion of the sleeve. A set-screw k6 mounted in the sleeve and acting against the post holds the sleeve rigidly in any position in which it may be placed.

M indicates a rest or support for the iingerbar located between the post and the stone and connected by an approximately horizontal pivot on to the sleeve L, so that it may be given an inclination from the horizontal to the right or lett, according as it is required to grind the ledger-plates on one edge or the other. rest or support with threaded neckspassed through a bar m2 and provided with nuts'm3, whereby the rest M may be placed at any required inclination to the post and the horizon. The rest is formed with forwardly and upwardly extending arms m4, having thereon a board or plate m5 to receive the finger-bar and sustain the same in proper position for presentation to the edge ot the stone. Set- Arms m extend rearward from the A screws m6 passed upwardI through the arms of the restserve as a mea-ns of raising the forward edge of the finger-bar and determine the angle of its presentation to the stone.

Set-screws m7 passed through the rear side of' 1 zontal, as shown in Fig. 3, and connect the the upper face ofthe stone.

pitman to a sleeve G, which is arranged to slide on the wrist and secured by a set-screw g. By moving this sleeve along the wrist, and securing it in different positions, the post may be caused to' stop in its forward movement at any required distance from the grindingwheel. As a further means of limiting the advance of the post and rest, and as a means of limiting the length of the vibration, I make the throw of the crank variable in any suitable manner, preferably by providing the disk on the end of the shaft C, at different distances from the axis, with a series of holes, as shown'in Fig. 3, into either of which the crank-pin may be secured at will.

It will be observed that the arms of the rest to sustain the finger-bar are rigid, so that the bar is given a positive support, and sustained at the required angle in its cross-section to the stone. In the grinding of sickle-knives, this rigid support is not desirable. On the contrary, it is desirable to have the knives rest freely and with their entire weight upon I therefore provide a second rest S, which may be applied to the sleeve L in place of the rest M. This second rest consists, iirst, of a plate s adapted to fit upon the pivot m, land provided with a curved slot to receive a clamping-screw s', so that it may be inclined to the right or left. To this plate is hinged the rest-plates2, so that it may be tipped upward and downward at the edge nearest the grinding-stone. On this plate s2 is placed a clamp S5, guided and held in place by bolts s4 and. sustained when released by lifting-springs S5. An eccentric lever s6, mounted on a stud 37, and acting beneath an overlying stationary bar S8, serves to force the parts together, and thus confine the cutter-bar, which is inserted between the clamp s3 and plate s2. l

When the above device is placed on the sleeve, the clamp serves to hold the cutterbar and present it in proper relation to the grinding-Wheel, allowing it, as it is moved to and from the grinding-wheel, to rest thereon and to sink as it is ground away.

In using the machine for the grinding' of finger-bars, the bar is laid upon the rest M and sustained thereby in position. The rest is then adj usted to the required inclination to the right or left, the vibration of the post suitably regulated, and the driven crank turned to set the wheel in motion. The post being automatically vibrated, advances the post toward the wheel and automatically withdraws it, so that the edge of the wheel is caused to advance along and sharpen the edge ofthe first ledger-plate. The bar is then moved endwi'se on the rest, the next plate sharpened in like manner, and so on repeatedly until all the plates are sharpened on one edge, after which the rest is tipped in the opposite direction, the movement of the lever reversed, and the plates ground one after another on their opposite edges.

In grinding the finger-bars I prefer to employ a wheel with a beveled edge, as represented in Figs. 1 and 2; but a thin grindingwheel with iiat faces may be employed.

In the grinding of cutter or sickle bars I prefer to use a stone with a square or rectangular edge.

Having thus described my invention,what I claim is- 1. The grinding-Wheel and the driving-shaft C geared thereto, in combination with the vibratory post K, its crank-arm, the pitman, and the crank on the drivin g-shaft, the sleeve adjustable around the post, and the rest pivoted to and adjustable as to its lateral inclination upon the sleeve.

2. In a machine for sharpening harvesterknives, the grinding-wheel, the shaft C geared directly thereto and provided with the crank 7c3, in combination with the pivoted vibratory postprovided with the rest to sustain the cutter, the arm extending rigidly from the lower end of the post and provided with the laterally-inclined wrist, as described, the pitman .attached at one end to the crank, the slide pivote'd to the lower end of the pitman and adjustable lengthwise upon the inclined wrist, whereby the rest may be advanced toward the stone a greater' or less distance, as circumstances may require.

3. The grinding-Wheel and the driving-shaft geared to said wheel and provided with crank k3, in combination with the vibratory postK, having the angular rigid arm k, the pitman connecting said arm with the crank k3, the rest for the cutter connected with the post through a horizontal pivot, in order that its lateral inclination may be reversed, and the post-sustaining plate I, adj usted, as described,

-to and from the grinding-wheels.

4. In a grinding device for harvester-cutters, the grinding-wheel, in combination with the vibratory post, the rotary sleeve L thereon, the adjustable stop-pin 7a4 and set-screw 7c to receive said sleeve, the rest N, pivotally connected to the sleeve, and a clamping device uniting the rest and sleeve to maintain the adjustment of the former, substantially as described.

5. In a machine for sharpening harvesterknives, the combination of the grinding-Wheel,

IOO

IIO

through the back of the rest to act on the rear edge of the cutter.

In testimony whereof I hereunto set my hand, this 15th day of February, 1888, in the presence of two attesting Witnesses.

VILLIAM S. VILLIAMS.

i Vitnesses:

D. W. WILLIAMS, BERNARD T. WILLIAMS.

Images