Improvements in Apparatus for Washing and Cleaning Grain.
Year: 1899

page_text: Date of Application, 7th Mar., 1899
Comalada Onnaifention Laft Ath Don 1000 Mecanted 12th Jan
1000
I, WILLIAM EDWARD WESTRUP, of 39, Seething Lane, in the City of London,
Miller do hereby declare the nature of this invention to be as follows:-
-
1. The apparatus consists of a vessel or tank conical at the bottom and cylin-
drical at the top, containing water.
2. Inside the above is fixed a perforated metal cylinder with a plain flat bottom,
in the centre of which is a small conical hopper fitted with a loose ball valve.
3. Inside the above is a drum flat at the bottom revolving on a hollow shaft, on
the outer edge of the drum are lifting blades or spiral beaters and at the bottom
are paddles or conveyors conveying from the centre to the periphery.
The cylinder (2) is immersed an inch or two in water, the drum (3) revolving
rapidly the bottom paddles or conveyors act as a gentle centrifugal pump and
cause the water to flow through the valve at the bottom of cylinder (2), the grain
is fed through the hollow shaft into the valve which is so weighted that the stones
and dirt drop through into the tank (1) and pass away with the dirty water, the
grain is floated by the water to the paddles at the bottom of the drum (3) and is
conveyed to the lifting blades at the periphery and so is carried to the outlet at
the top of the cylinder, the water is thrown radially through the perforations
and falls into the tank (1).
11
1000
Improvements in Apparatus for Washing and Cleaning Grain.
I. WILLIAM EDWARD WESTRUP, of 39, Seething Lane, in the City of London,
Miller, do hereby declare the nature of this invention and in what manner the
same is to be performed to be particularly described and ascertained in and by
the following statement:―
Figure 1 is a vertical section and Figure 2 a plan of an apparatus constructed
according to this invention.
The apparatus consists of a vessel or tank a conical at the bottom and cylindrical
at the top, containing water.
Inside the tank a, is fixed a perforated metal cylinder b, with a plan flat bottom.
in the centre of which is a small conical hopper c, fitted with a loose ball valve d.
Inside the cylinder b, is a drum e, (shown separately in side elevation and
underside view at Figures 3 and 4.) flat at the bottom, revolving on a hollow
shaft f. On the outer edge of the drum e, are lifting blades or spiral beaters g,
D
077

page_text: and at the bottom are paddles or conveyors h, conveying from the centre to the
periphery.
The cylinder is immersed an inch or two in water, the level of which is
governed by the overflow j, the drum e revolving rapidly, the bottom paddles or
conveyors act as a gentle centrifugal pump and cause the water to flow past the
valve d, at the bottom of cylinder b. The grain is fed through the hollow shaft f,
onto the cone d', which rests on radial fins d², and from thence it falls into the
hopper e, the valve d being so weighted that the stones and dirt drop through
into the tank a, and are removed from time to time at the outlet k, which is closed
by a valve or plug, not shown. The grain is floated by the water to the paddles h,
at the bottom of the drum e which scour the grain and is conveyed to the lifting
blades at the periphery, and so is carried to the outlet 7 at the top of the cylinder b,
the water is thrown radially through the perforations and falls into the tank a.
Water is supplied to the drum e by the pipe m.
The perforations in the drum e are comparatively large, say 3/8ths of an inch in
diameter as the grain has no tendency to pass through owing to centrifugal force,
whilst those in the cylinder are small enough to prevent the passage of the grain.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what
I claim is
1. Feeding the grain into water above a floating valve past which there is a
current of water in an upward direction.
2. Feeding the grain downwards through a hollow central vertical shaft into
water above a floating valve past which there is a current of water induced by
blades or paddles carried by the shaft.
3. Propelling the wet grain through an annulus with perforated walls.
4. Apparatus for washing and cleaning grain substantially as described and
illustrated in the drawings.
1
1000