US174253A - Improvement in grain-cleaners - Google Patents

Description

. proved grain-cleaner.

UNITED STATES EDWIN W. JOHNSON, OF FORESTON, ILLINOIS.

IMPROVEMENT IN GRAIN-CLEAN ERS.

Speciiiaation forming part of Letters Patent N o. 174,253, dated February 29, 1876; application tiled October 23, 1875. v

Y To all whom it may concern:

e Be it known that I, EDWIN W. JOHNSON, of Foreston, in the county of Ogle and State 4of Illinois, have invented a new and Improved and brusher, combined in one lnachine, and

having a fan-blower so contrived that each diii'erent part is subject to air-currents for taking Oft' the light impurities freed from the grain or exposed to the air in it.

Figure 1 is a sectional elevation of my im- Fig. 2 is a top view. Fig. 3 is a plan ot' the bottom. Fig. 4 is a plan of the upper head of the scouring-drum, and Fig. 5 is partly a side elevation and partly a section.

Similar letters of reference indicate corresponding parts. v

A represents a screen on the topof' the ma chine into which the grain is first delivered, and from which it passes into the spout B for conducting it into the scourer. In the upper portion of spout B the grain is subjected to an upward draft of aair, which passes through Openings O into vacuum chamber D, and thence through passage E to fan F, and takesy Oft the light matters exposed to it in the spout 1B. The grain passing over into the vacuuinchamber D falls therein, and passes Out through the valve G. H is a valve to regulate the admission of air to the vacuum-chamber, and thus determine the strength of the blast. I is the `perforated stationary case of the scourer; J., upper head; K, lower head, and L-rozls, altogether forming the drum of the scourer, below which is a brushing contrivance, vconsisting Of van extension of the perforated case I and the revolving brushes M.

Both the scourer and the brush are tapered, asI shown. so that thedescent of the grain will be obstructed more than it would it' by reason of a true cylindrical form its passage was vertical.

Outside of the perforated case I, and at suitable distance from it for a dust-space, `is

l another unperforated case, N, in which space air-currentsare established by the fan F for carrying oft' the dust and other light matters set free by the scourer and brush, the air being admitted through passages O at the bottom with regulators P, and passing up through openings Q. The grain passes oft' through spout R into suction-spout S, where it is again .subjected to a strong air-current to take out vthe heavier impurities. A valve, T, in this spout, regulates the action ofthe draft, and a vacuum-chamber, V, receives the grain carried .up in the spout.

The screen Ais operated by an eccentric, L', On the shaft, with which there is an adjustable yoke, m,'to regulate the action, and in practice the eccentric will be made adjustable, to let it down on the shat't fro'mtime to time as the latter is raised by the adjustable step-bearer Z for adjusting the brush as it wears away.

The upper head to th. scourer is made open, tolet grain fall into the drum to be thrown out against and between the rods, but the lower head is close, to exclude the grain from the interior of the brush.

Having thus described my invention, I claim as new and desire to secure by LettersPatent-.-

1 The combination, with scourer A, spout B, fan F, and passage E, of chamber D, intermediate between the spout and passage, and

provided with Openings O, as and for the 'purpose described. p

-2. lThe combination, with fan F, ot' perforated case I, im perforate case N ,'open upper head J, closed lower head K, and rods L, all arranged as and for the purpose set forth.

3. The combination of a regulating-valve, T, with spout S, provided with settling-chamber V and fan F, as and for the purpose specitied.

EDWIN WHELER JOHNSON.

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