US918226A - Grain-hulling mill. - Google Patents

Description

D. UHLHORN, JR. GRAIK HULLING MILL. A-PPLIOATION FILED Nov. a, 1906.

918,226. Patented Apr. 13, I909.

2 SHEETS-SHEET 1.

DIEDRIOH UHLHORN, JR, OF GREVENBROIOH, GERMANY.

GBsAIN-HULLING MILL.

Specification of Letters I-atent.

Application filed November 8, 1906.

Patented April 13, 1909.

Serial No. 342,464.

To all whom it may concern:

Be it known that I, DIEDRIOH UHLHORN, J11, a subject of the German Emperor, and resident of Grevenbroich, Germany, have invented new and useful Improvements in Grain-Hulling Mills, of which the following is a specification.

The hulling mill embodying the present invention has the object to free the dry or moistened grain from the outer woody fiber hull, by intense frictional contact of the berries against each other and against the work ing faces of the hulling mill.

On the accompanying drawings, Figure 1 shows a central vertical section, and Fig. 2 a plan, of the mill.

On the iron casing 1 the iron holder 2 for the to) bearing 3 is fixed by screws into which iolder the bed-stone 4 is fitted. The runner 5 is also fixed in an iron holder 6 which is keyed on the mill shaft 7. The latter is supported in the top bearing 3 and in the bottom bearing 8 which is ada ted to be raised or lowered by means of t e hoisting device 9 and guided in the socket 10.

The runner 5 is, by means of the hoisting device 9, so adjusted that the distance between the working faces of the millstones is somewhat larger than the greatest length of the grain.

The grain to be hulled which is filled in the mill by one of the known mill hoppers, falls through the opening 11 onto the rotating runner 5 and is forced by the centrifugal force between the roughened hulling faces of the two millstones, whereby the berries come in such intense frictional contact with each other and with the working faces of the mill that the woody fiber hull is entirely or partly strip ed off according to whether the grain was i led in the mill in a moistened or dry condition.

The adjustable ring 12 serves for preventing the grain from leaving the mill too quickly. The ring 12 is riveted on five screws 13 of which the nuts, forming small chain wheels 14, are mounted on the upper holder 2 and in the members 15 bywhioh they are prevented from axial motion.

Around the five small chain wheels 14 an endless chain 16 is placed. By turning the hand wheel 17 which is keyed on the extended boss of one of the small chain wheels 14, the ring 12 can be uniformly raised or lowered.

The diameter of runner 5, exceeds that of bed-stone 4, so that an annular portion of the former is exposed around the latter. The ring 12 encircles the bed-stone 4c, and is thus arranged above this exposed part of the upper working surface of runner 5, the latter extending laterally beyond the outer edge of the ring. In this way a circular grain discharge slot is formed between the ring and the working surface of the runner, the height of which is less than the distance between the working surfaces of runner and bed-st0ne. By means of this construction, the ring, while regulating the discharge of the grain, will not change its direction of travel, and will thus offer an unobstructed discharge opening for the hulled grain.

Between the bottom bearings 8 and the hoisting device 9, rubber bufiers 18 (or also a spiral spring of steel) are inserted in order to be compressed when the pressure between the working faces of the mill becomes too high and the runner is somewhat lowered, by which compression the outgo of the grain is considerably facilitated.

By turning the nut 19 and fixing the same by the counternut 20, the rubber bufiers 18 are tensioned to the pressure necessary for the hulling action. By the baffle plates 21 the grain hulled is forced through the outlet 22 out of the mill, and is then separated from the hulls in the known manner.

Having fully described my invention what I claim and desire to secure by Letters Patent is In a grain hulling mill, a casing, a bedstone secured thereto and having a lower working surface, a shaft rotatably supported in the casing, a runner keyed to the shaft below the bed-stone and having an upper working surface, the diameter of the runner exceeding that of the bed-stone, and an adjustable ring which encircles the bed stone, projects below the working surface thereof and faces the working surface of the runner, to form a circular discharge slot between ring and upper runnersurface, the height of which is less than the distance between the working surface of bed-stone and runner, substantially as specified.

Signed by me at Dusseldorf, Germany this nineteenth day of October 1906.

DIEDRICH UHLHORN, JR.

VVitnesses ALFR. FOHLMEYER, M. ENGELS.

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