US33636A - Improvement in grain-separators - Google Patents

Description

Grain Wnnower.

Patenvted Nov. 5, 1861.

N. PETERS. Pham-ummm". wamiman. D. CA

UNITED STATES PATENT OEErcE.

ALEXANDER H. DIXSON, OF SAN FRANCISCO, CALIFORNIA.

IMPROVEMENT IN GRAIN-SEPARATORS.

Specification forming part of Letters Patent No. 33,636, dated November 5, 186i.

To all whom it may concern:

Be it known tha-tl, ALEXANDER H. DIXsoN, of the city and county of San Francisco, in the State of California, have invented a new and Improved Grain Cleaning and Separating Machine; and I 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 l is a vertical longitudinal section of my invention,"taken in the line :c x, Fig. 2 and Fig. 2, a transverse vertical section of the same, taken in the line y y, Fig. 1.

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

This invention relates to a new and improved machinedesignedfor separatingwheat from oats and barley, as well as from straw and other foreign substances.

The object of the invention is to obtain a machine which may be adjusted to suit the condition or quality of the grain, and to have the blast act in a more efficient manner than hitherto on the former.

To enable those skilled in the art to fully understand and construct my invention, I will proceed to describe it.

A represents a frame, which may be constructed in any suitable way, to support the working parts of the machine, and B :is a rotary fan which is placed at the upper part of the framing at one end. The fan B may be constructed in the usual way, and it is inclosed by a fan-box C, the orifice aot' which is in line with a rectangular box D, which is suspended in the frame A by rods b, two rods being at each side ot the box, said rods being attached to the frame and box by pivots, so as to admit of the box having a swinging or oscillating movement.

E represents the driving-shaft of the machine, said shaft being at the lower part of the frame A, and having two eccentrics c c, from which eccentrics the box D is operated by connecting-rods F. The fan B is driven from the shaft E by a belt d.

Vithin the boxD there are placed a series of screens e, which are inclined and are parallel one with another, as shown clearly in Fig. 1. Directly underneath each screen e there is placed an inclined board or chute f.

These boards or chutesf are inclined in areverse direction to the screens e, and each chtite conducts the substance which passes through the screens immediately above it to the head of the screen immediately below it. The lower and outer end of each screen e is connected to the outer end of the chute f im mediately below it by means of a leather strip g, or any yielding fabric. rlhese strips g close the spaces aX between the screens e and the chutes f at their outer ends, the spaces ax, at the inner ends of the screens andchutes, being open to receive the blast from the fan-box C. The spaces b between the inner ends of the chutes f and screens e below the chutes are protected from the blast by means of upright bars or shields h. (Shown clearly in Fig. l.)

Each screen e is secured near its back end within the box D by means of pivots t', and the outer ends of the screens are secured in proper position by means of set-screws'7',which pass through slots 7c in the sides of the box D. By this arrangement it will be seen that the screens may be adjusted in a greater or less inclined position, as desired, the strips g admitting of such result and at the same time keeping the outer ends of the spaces ctx closed at all points of adjustment of the screens.

Just below each screen e at its outer part there is placed a slide G. These slides may be of sheet metal, and by adjusting them in and out the screens care virtually lengthened or shortened.

On the top of the box D there is placed a coarse inclined screen 7c. This screen admits all the grain and small substances through it, while the coarse substances are discharged at the side of the machine. The grain, it will be seen, as the machine is in operation passes through the several screens e, each screen separating and discharging from its lower inclined enda portion of the foreign substances, the good grain being discharged from the lower chute f, as shown at Z, Fig. 1. The blast from the fanbox C is directed directly into the spaces ctx, and is rendered very effective, as none of it is lost, all being made to pass through the screens e and eject light dust and impurities from the grain.

The box D is vibrated with an easy movement well calculated to aid the screens in effecting a separation of oats aud barley from the wheat. The adjusting of the screens e to vary their inclination, as Well as the employment of the slides Gto vary the length of the screens, are important, for by these means the machine may be adjusted to suit the condition,and quality of the grain, very poor and dirty grain requiring` a slower and more efcient screening than grain which is iu good condition.

Having thus described rnyinvention, Whatl claim as new, and desire to Secure by Letters Patent, is

l. The employment or use of a series of adforth.

' A. II. DIXSON;

Witnesses:

GEO. C. MOORE, ROLAND GELSTON.

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