US38258A - Improvement in grain-cleaners - Google Patents

Description

2 Shegts-Sheet 1.

G. GLAR K. GRAIN OLBANER.

m. 38,258. Patented Apr. 21, 1863.

Men or 2 Sheets-Sheet 2.

G.CLARK.

' GRAIN CLEANER.

Patented Apr. 21 1863.

UNITED STATES PATENT OFFICE.

GEORGE CLARK, on sANDUSKLOHIO, Assrenon T0 HIMSELF AND ROBERT 'DUNBAR, or BUFFALO, NEW YORK.

IMPROVEMENT IN GRAIN-CLEANERS.

Specificationforming part of Letters Patent No. 38,258, dated April 21, 1863.

.T0 at whom it may concern.-

Be it known that I, GEORGE CLARK, of Sandusky, in the State of Ohio, assignor to myself and ROBERT DUNBAR, of Buflalo, New York, have invented an Improved Grain- (Jleaning Machine; and I do hereby declare that the following is a full, clear, and exact in the supply-tube, .and spreads the grain evenly and uniformly into a thin sheet to be acted upon by a eurreiit of air.

Letters of like name and kind refer to like parts in each of the figures.

I make an outer cylindrical case or shell of sheet metal, which is represented at A', andan inner cylindrical case or shell, which is represented at A, leaving an annular suction airspace between them, as shown at B. These cylinders'or shells may be of any required diameter and height.

The drawings are on a scale of about threeeighths of an inch to the foot.

Within the inner cylinder or shell I place a conical distributer, as shown at G, the apex C of which is made automatic by means of the spindle D and spring E. The spindle D is supported upon the cross plates M N, and

the coil-spring E surrounds the spindle between these plates.

Gent-rally within the inner cylinder and directly over the apex of the conical distributer 1 place a grain-supply tube, F, the apex of the cone passing slightly into the mouth of the tube.

The fans-Gr are of ordinary construction and may be placed over 'the cylinders, as represented in the drawings, or they may be otherwise placed, the object to be gained being to produce a strong suction current of air up between thecylinders, as represented by the arrows 1 2.

H represents aspout, which conducts the grain from the elevator to the supply-tube F.

T is a slide-valve, which may be raised or lowered by ordinary means, as desired, in order to regulate the draft .of air.

Power is applied to the fans in a common manner.

This improvement is particularly calculated for use in connection with grain' elevators ,but is applicable to. all places where grain is to be cleaned. It possesses a greater capacity for cleaning grain, occupies less room in a building, is cheaper of construction, and operates more perfectly'than any other grain-cleaner now in use with which I amacquainted.

. Operation: The grain is conducted from the elevator or other place through the spout H into the supply-tube F. The apex C willclose, or nearly so, the mouth of the tube when there is no grain in it. When the grain accumulates in the tube to the amount of one or two bushels, (more or less, according to the power of the spring 15,) the spring will yield and lower the apex, so that the grain will pass out evenly over all parts of the apex and drop down upon the cone 0, and thence slide into the annular space B in a thin and evenlyspread sheet where the air has full action upon it. The cone-apex O acts automatically, according to the pressure of grain in the tube F, yielding more when the supply of grain is large and less when the supply is less, so as to insure aproportionately even supply of grain upon the cone 0, although the' grain may be delivered from the elevator into the supplytube F in annnsteady stream. As the grain drops from the cone into the annular space B, the air has full power upon it, and the chess, chafl', dust, and light grain will be carried up by the strong current of air. over the top of the inside cylinder and dive down, as shown by the arrows 3 4. The chafl' and dust will be carried up again by the'air into the chamber W, and thence out through the fan-case, while the chess and light grain will drop down into the chess-box P, and thence be conducted off through the spout Q. A hopper of ordinary construction may be placed at the bottom of the cylinders to catch the grain as it is cleaned,

from whence it may be taken in a eemmon manner. 7

This improvement accomplishes the object sought in the most satisfactory manner.

What I claim as my invention, and desire to secure by Letters Patent, is-

1. The cylinders of shells AlA', arranged witha suction air-space, B, between them, in.

combinationwith the adjustable valve T, for the purposes and substantially as described.

I 2 The' cone-distributer' G and aut mat-ie cone-apex C, in combination with the cylinders or shells A A, andcentral grain-supply tube, F, for thepurposes and substantially as set ferth.

GEORGE OLARK.

Witnesses:

E. B. FORBUSH, W. H. FORBUSH.

Images