US20601A - Hullihg-stone dress - Google Patents

Description

UNITED STATES DATEN T CFFTCE.

JNO. A. WILSON, OF DOVER, NEW JERSEY.

HULLING-STONE DRESS. v

Specification of Letters Patent No. 20,601, dated June 15, 1858.

To all 'whom t may concern.'

Be it known that I, JorrN A. WiLsoN, of Dover, in the county of Morris, in the State of New Jersey, have invented a new and Improved Method of Dressing Millstones for the Purpose of Hulling Rice and all Grains Having a Hull or Husk; and I do hereby declare that the following is a full and exact description thereof, reference being had to the accompanying drawings and to the letters of reference marked thereon.

Figure 1st is a plan of the runner stone inverted. Fig. 2d is a plan of the bed stone.

The runner, Fig. lst is 3G inches in diameter and after being dressed to a smooth plain surface perfectly out of wind is laid out -and the cut or dress generated as follows. First, draw two straight lines (A1 and A2) intersecting each other at right angles at the center of the stone. Second, describe a circle of 3 inch radius (B) for eye of stone. Third, describe circle of S inch radius (C). Fourth, draw a straight line (D1) from the intersection of circle B with radius A1 to the intersection of circle C with radius A2. Draw 2d, 3d :and 4th in like manner. Fifth, bisect line D1 and describe arc of circle (El). Contract dividers of an inch and describe corresponding circle which will show size and shape of first discharging furrow. 2d, 3d and 4th are generated and described in like manner. Sixth, extend dividers 16 inches and place each foot lat intersection of radial line A1 with circle C and describe first retaining furrow (F1) from said intersection to skirt of stone. Contr-act dividers of an inch and describe correspo-nding line which will indicate shape and width of retaining furrows. Construct 2d, 3d and 4th in like manner.

The bed Fig. 2d is 36 inches in diameter and after being prepared as described in Fig. 1st is laid out as follows. First, draw four straight lines (A1, A2, A3, A4,) intersecting each other in the center at octangles. Second, describe a circle 2g,- inch radius (B) for eye circle. Third, describe a circle of 8 inch radius Fourth, describe a circle of l2 inch radius (D). Fifth, draw straight line (El) from intersection of circle B with radius A1 to intersection of radius A3 with circle C. Draw 2d, 3d and 4th in like manner. Sixth, bisect line E1 and describe arc of circle (F1), contract dividers inch and describe corresponding circle which will show shape and size of first discharging furrow. Construct 2d, 3d and 4th in like manner. Seventh, extend dividers 16 inches and place each foot at intersection of radial line A1 with circle C and describe arc of circle (G1) to right hand. Contract dividers of an inch and describe corresponding line which will indicate shape and width of first retaining furrow. Construct 2d, 3d and 4th in like manner. Eighth, continue dividers 16 inches apart and place one point on intersection of line A2 with circle C land describe segment of circle (H1) from circle D to skirt of stone. Contract dividers eg of an inch and describe corresponding line for breadth of furrow. Construct 2d, 3d and 4th in like manner.

Should the stones used be of greater or less dimensions than 36 inches diameter then of course the various circles and arcs of circles must be proportionably increased or reduced.

All furrows must be dressed a. true gage or arc of circle; those in runner -linch deep and those in bed inch deep.

The two stones run parallel at from -lto inch apart. The grain being fed through the eye of the runner is thrown instantly from the center of the stones by the centrifugal force greatly assisted by the 4 discharging furrows in the runner and bed until it reaches circle C where it is partially arrested and retarded by the retaining furrows of runner and bed until it reaches a radius of l2 inches at circle D when it is subjected to an additional similar retarding operation until it is fully scoured and hulled, in this manner obviating the long known difficulty of hulling stones clogging at the eye and carrying the grain instantly to the outer part or periphery of the stone and retaining it there where the stones have most power of operation and also equalizing the distribution of the grain over the stones, thereby effectually obviating all liability of the grain breaking by being overcrowded.

`What I claim las my invention and desire to secure by Letters Patent is The manner of generating and constructk ing furrows in hulling stones for the purpose of equalizing the distribution of the grain over the surface of the stones so as to prevent clogging at the eye and retaining the grain on the periphery of the stone until perfectly hulled ias is above substantially set forth and described.

JOHN A. wiLsoN. [1.. a]

Witnesses:

F. S. FREEMAN, GEO. B. SANFORD.

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