US268647A - Thrashing machine - Google Patents

Description

(No Model.) 3 Sheets-Sheet 1.

J. H. ELWARD.

THRASHING MACHINE.

No. 268,647. Patented Dec. 5. 1882.

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(No Model.) 3 Sheets-Sheet 2. J. H. ELWARD.

THRASHING MACHINE.

Patented Dec. 5, 1882.

InvanZ? 3 Sheets-Sheet 3.

(No Model.)

J. H. ELWARD.

THRASHING MACHINE.

Patented Dec. 5, 1882.

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UNITED S ATES PATENT OFFICE.

JOHN H. ELWARD, OF STILLWATER, MINNESOTA.

THRASHlNG-MACHINE.

SPECIFICATION .forming part of Letters Patent No. 268,647, dated December 5, 1882.

' Application filed December 21, 1881. (No model.)

new and useful Improvements in Thrashing' Machines; and I do hereby declare the following to be a full, clear, andexact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being hadto the accompanying drawings, and to letters or figures of reference marked thereon, which form a part of this specification.

Figure l is an elevation of a thrashing and separating machine embodying my improvements, taken from the side opposite to that re- Fig. 2 is an elevation from the other side, parts of the casin g being brohen away to more clearly show the interior parts. Fig. 3 is a View on a larger scale of the devices at the rear end of the machine.

In the drawings I have shown the whole of a thrashing and separating machine, many of the parts ofwhich, however, do not pertain essentially to my invention, and therefore need not be here described in detail, though they are indicated by letters, thus:

A A represent the ground-wheels; B, one

sideof the casing B, the other side of the casing;-O, the feeding table or trough; D,

the position of the fan 5 E, the tailings-eleva-- tor; F, the return-spout for the tailings, and G the shaking-shoe.

H represents a shaft below the cylinder and parallel to the axis thereof. I is a gear-wheel on said shaft, and J a band-wheel outside thereof. These parts are upon the side of the machine opposite to that receiving power from the engine or horse-power. K is a spur pinion meshing with the spur-wheel I.

L represents the belt-pulley on the end of the fan-shaft; and M is a belt by means of which power is taken to said belt-pulley L from the band-wheel J, there being a beltti ghtener employed, if desired, the one shown consisting of a pulley, N, a pivoted arm, 0, and an adjustable bar, P.

Q is a crank-wheel on shaft H at the opposite side of the machine. It is connected with the bar S by a pitman, R, which bar S reciprocates the separating-table. The shaft H at the end having the crank-wheel (9,, is sup.-

ported by means of a bracket having a vertical leg, T, attached -to the, lower sill, and a transverse arm, U, connected to the upright.

Outside of the spur-pinion K on the cylindershaft are two belt-pulleys, V V of which the pulley V conveys power to the cylinder E(to be described) by means of a belt, V, and the pulley V conveys power by another belt to the pulley a. of the beater-shaft 0. Outside of the belt-pulley a there is a secondary pulley, c, by which power is conveyed from the beatershaft to the pulley cl, which operates the grainrake.

6 represents a raddle-belt or tailrake, mounted upon pulleys or rollers, f. It is supported within a detachable frame, the lower end of which conforms to and is supported against the rear end of the thrashing-machine, it being attached thereto by means of hangers g g. This frame consists of side pieces, hh, and two bottom pieces, t It. The part of the bottom is connected with the partz'by means of springs l l, or otherwise, which are flexible enoughto allow the part It to swing downward, but stitt' enough to throw said part hack and hold it, when the machine is'at'rest, in the same plane as the part i. This inner part, 70, of the bottom is tossed or reciprocated up and down by the ffollowin g devices:

m is an eccentric mounted on the shaft n of g the lower roller of the raddle-belt.

n is a strap surrounding the eccentric m.

o is an arm or lever pivoted at or near its center to the side h of the frame. At its upper end it ispivoted tothe strap a. At its lower end it is pivoted to a rod or pitmamp. The lower end of this pitman is mounted .loosely in a bearing formed by a block, q, said block being situated somewhat below the springs Z l. When the shaft nis rotated for operating the belt 6 the bar 0 is oscillated, and this imparts to the part kof t-he bottom a quick shaking or tossing motion, whereby the grain is discharged from the bottom more freelyinto the shoe.

The thrashing-cylinder O, with its concave D, operates in substantially the ordinary man nor to remove the grain from the heads. With this ordinary cylinder I have combined a secondary cylinder, for the purpose of cutting the straw into small pieces, and devices for feed ing and guiding the straw directly from the thrashing-cylinder G to the cutting-cylinder.

The cutting-cylinder is represented by E, and its concave by F, both being provided with sharp teeth adapted to cut the straw. After the straw has been operated upon by the secondary cylinder it is passed to the beater, which in the ordinary manner operates to distribute it properly upon the separating-table W Thestraw afterbeingthusoperatedupon and passed out of the machine is ready to be packed or stored in any desired manner, it being in .such condition as to be adapted for feeding. This is a matter of great importance in many sections of country, and is a great saving in the work and expense of thrashing and preparing straw. The straw is guided from the thrashing-cylinder G to the cuttingcylinder E by the grating c, the vertical walls 0 and the top d of the casing, the material passing to the second cylinder through these guiding devices while under the motion imparted to it by the thrashing-cylinder.

W represents a cut-off, consisting of a board or partition which extends from immediately in rear of the end beater, W, to a suitable point above the separating-table. It is hinged at its upperedge, and at its lower edge is arranged to swing to a limited extent, its downward movement being limited by one or more stops, w. It operates to prevent the air over the separating-table from being thrown forward bythe beater toward and beyond the cylinder, this air being heavily charged with dust While the machine is in operation. Its lower end is allowed to swing somewhat,.so that it can be elevated sufficiently to permit the passage of any straw that may be carried around by the beater While revolving.

K (see Fig. 2) is a swinging apron or guard, arranged in rear of the heater and the cut-ofi' W, and adapted to receive straw and grain thrown from the beater, and to hinder or restrain their passage toward the tail end of the machine.

I do not claim broadly an apron or guard arranged in rear of a thrashing-cylinder or heater; but I believe that the combination therewith of a heater and the cut-off W is new. It may consist of a curtain, a sheet of metal, or board; or it may be composed of a series of round bars or rods flexibly connected with the casing and arranged in parallel lines, horizontal or vertical, in the usual manner. The cut-ofl' will also prevent any grain which may rebound from the guard X from coming in c ntact with the blades of the beater and being thus shattered.

Heretofore it has been customary to reciprocate the shoe by means of a rod operated by an eccentric on the shaft. The eccentric and its strap, it has been found, require much careful attention to prevent their being cut and entirely destroyed, and even when such attention is bestowed upon these parts they are rapidly worn away, and are a source of constant trouble and expense. I obviate this by means of a simple arrangement of cheaply and easily constructed parts, which are not only not liable to the impairing agencies which destroy the eccentric and strap, but are also easily replaced if breakage or Wear should occur. These devices consist of two levers, X X, the former pivoted to the connecting-bar S between the cranks of the separating-table, and the other, X, pivoted to the part X and tothe lower sill of the machine. The rod x, which operates the shoe, is pivoted to the part X. This latter connection may be adjustable, so as to alter the throw of the rod :20, and the pivot as may also be adjustable, if desired.

' I am aware that use has been made of a hinged shield immediately behind the thrashin g-cylinder for the purpose of deflecting the upwardly-thrown straw, and insuring that it shall be delivered properly to the separatingtable; but I am not aware of the use of a shield constructed and arrangedsimilarly to the cutoff or hinged shield W, which I have shown adapted both to preventthe drawing toward the cylinder of dust-laden air and also to yield to any lumps or masses of straw that may be carried upward by the beater behind which it is arranged.

What I claim is- 1. In a thrashing and separating machine, the com bination, with the thrashing-cylinder O and concave D, arranged to separate the grain from the straw, and the cutting-cylinder E and concave F, arranged to cut the straw after the separation of the grain, of the guiding devices c c d, which conduct the straw to the cutting-c linder as it is thrown from the thrash; ing-cylinder, substantially as set forth.

2. In a thrashing and separating machine, the combination, with the straw-carrier, having the swinging bottom 70, of the shaft n, the eccentrics m on said shaft,and links connecting said eccentrics withthe swinging bottom, substantially as set forth.

Y 3. In a thrashing and separating machine, the combination, with the thrashing-cylinder, the separating-table, and the beater behind the cylinder and above the table, of the cut-off W hinged at its upper edge behind the beater, the

lower edge arranged in proximity to the beater and adapted to yield upwardly, substantially as and for the purposes set forth.

4:. The combination, with the beater, the separating-table, and the cut-off W, of the yielding guard X substantially as set forth.

5. The combination, with the thrashing-cylinder, the separating-table, the beater behind the cylinder and above the table, of the cut-off W,situa ted behind the heater, and stops arranged, substantially as set forth, to hold the cut-off when in a normal position, inclined toward the beater, the cutoff being hinged to yield upwardly at its lower end, substantially as set forth.

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

JOHN H. ELWARD.

Witnesses:

H. H. DOUBLEDAY, H. H. BLIss.

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