US13688A - Grain-separator - Google Patents

Description

WRIGHT & BEAN.

Grain Separato r.

No. 13,688. Patented Oct 16, 1855 UNITED STATES PATNT onrrc.

BENJAMIN WRIGHT AND JOHN BEAN, OF HUDSON, MICHIGAN.

GRAIN-SEPARATOR.

Specification of Letters Patent No. 13,688, dated October 16, 1855.

To all whom it may concern:

Be it known that we, BENJAMIN WRIGHT and J oHN BEAN, of Hudson, in the county of Lenawee and State of Michigan, have invented a new and Improved Grain-Separator; and we do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the annexed drawings, making a part of this specification, in which- Figure 1, is a longitudinal vertical section of our improvement, (00), (m), Fig. 2, showing the plane of section. Fig. 2, is a transverse vertical section of ditto, (y), (y), Fig. 1, showing the plane of section.

Similar letters of reference indicate corresponding parts in the two figures.

The nature of our invention consists in the employment or use of a rotating screen, and shoe, arranged as will be hereafter shown, for the purpose of effectually separating gram from straw.

To enable others skilled in the art to make and use our invention, we will proceed to describe its construction and operation.

A, represents a box or case in which the working parts of the machine are placed.

B, represents a screen which is of slightly conical or taper form and is fitted within circular rims C, by arms (a), the screen being at the centers of the rims C, and its larger end or diameter being at the end of the box or case, the larger end of the screen projects a short distance beyond the outer rim C, the two rims and screen being within the box or case, as clearly shown in Fig. 1. The screen B, is encompassed by another screen D, which is attached to the inner sides of the rims C. This screen is also of conical or taper form, but is placed in a reverse position to the screen B, as its larger end encompasses the smaller end of screen B. The screen D, is finer than the screen B.

E, is a shoe which is placed longitudinally in the center of the screen B, and is suspended by rods or chains (6), (b), from the upper part of the box or case A. This shoe may be formed of a series of fingers or slats (c) or it may be formed of a sieve nailed to a frame, or in any other suitable manner. The front end of the shoe has two pendent rods (cl), (cl), attached to it, one at each side. One of these rods is shown by dotted lines Fig. 1.

In the front end of the box or case A, and

at its lower part there is placed within a suitable case F, a fan G, the shaft H, of which has projecting arms (6), attached to it, one at each end, which arms as the fan rotates act against the rods (cl), (CZ), attached to the shoe E, see Fig. 1.

1, represents a spiral spring which is attached to the front end of the shoe E, and the inner side of the box or case A.

J, represents a concave attached to the inner side of the box or case A, and K, is a toothed roller, which works or rotates over the concave.

The rims C, rest on friction rollers L, at each side of the box or case A, the friction rollers at each side of the rims being connected by shafts M.

Motion is given the fan shaft H, and the toothed cylinder K, by means of a belt (7), which passes around pulleys (g), at one end of the fan shaft and cylinder, and motion is given the two cylinders B, D, by means of a belt (71.), which passes around one of the shafts M, and around a pulley at one end of the fan shaft H.

The grain and straw passes between the cylinder K, and concave J upon the shoe E, and a shake motion is given the shoe in consequence of the arms (6), striking the rods (cl), ((1), the straw is carried along the shoe and drops or falls off the ends of the fingers or slats (0), see arrows Fig. 1, while the grain and short light particles fall between the fingers or slats within or upon the screen B. The grain passes through the screen B, and falls upon the screen D, and drops off or is discharged from the screen D, as shown by the arrow 1. The short light particles are discharged at the end of screen B, as shown by the arrow 2, and dust, chafi, etc., is blown out from both screens by the blast generated by the rotation of the fan G.

The above improvement is chiefly designed to be applied to threshing machines to separate the grain from the straw. It is much simpler and operates more effectually than the separators now employed. The toothed concave and cylinder detaches the grain from the straw, or loosens the straw, while the long shoe E. shakes it as it conveys it along through the screen B, causing all the grain to be sifted or separated therefrom while the two screens B, D, and fan G, separate the chaff, dust, etc. from the good grain.

WVe do not claim the cylinder, concave,

and fan, separately for they have been preand the grain shaken therefrom within the screens as described.

WVitnesses ROSWELL RosE, EZRA Arms.

13. WRIGHT. JOHN BEAN.

Images