Improvements in Grain Drying Centrifugal Hydro-extractors.
Year: 1897

page_text: Date of Application, 30th Sept., 1897-Accepted, 6th Nov., 1897
COMPLETE SPECIFICATION.
Improvements in Grain Drying Centrifugal Hydro-extractors.
I, SIDNEY LEETHAM, of the Anglo-Hungarian Roller Flour Mills, York, in
the County of York, 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:-
Grain after being washed is often subjected to the action of a centrifugal
hydro-extractor by which the water accompanying the grain is driven through
perforations of a stationary casing. My invention relates to means of clearing
these perforations, which are apt to become obstructed, and I effect this by brushes
arranged as I shall describe referring to the accompanying drawings.
Figs. 1 and 2 are part elevations of the hydro extractor as seen on planes at
right angles to one another. Fig. 3 is a plan, the upper half shewing the brushes
in action as they descend, the lower half shewing them out of action as they
ascend.
A is the perforated cylindrical casing of the hydro extractor, B its delivery
spout. To the support at each side of the casing I fix a frame consisting of two
vertical guide bars C C connected at top and bottom by transverse girders C¹ C³,
having mounted on each of them a pair of sprocket pulleys D, E. These pulleys
are driven by any suitable gear so as to cause a pair of endless chains to travel
vertically parallel to the casing A. To each chain is attached by a holder F
a sleeve, of which there are thus two G G on the one side and two G G on the
other side, the pair of sleeves in each case being fitted to slide along a horizontal
transverse rod H.
To the sleeves G G¹ is attached a semicircular frame H¹ in front and H2 at
the back, these frames carrying brushes K. The one frame H¹ is cranked at h
so as to give clearance for the spout B.
The chains being caused to travel uniformly together, the two semicircular
frames are caused to move up and down alternately. As they ascend, the holders F
are on the outer part of the chains and beyond the guide bars C, and consequently
the sleeves G G and G¹ G' and the frames H and H2 and their brushes K are at
some distance from the casing A. But as the chains turn over the upper pulleys D),
the holders F are brought inwards and the sleeves G G and G¹ G', the frames H¹
and H2 are moved towards the casing A so that, as the brushes K descend, the
holders F move along the inner faces of the guide bars C and the brushes rub
along the surface of the casing, clearing its perforations and carrying down the
dirt.
Having now particularly described and ascertained the nature of this invention
and in what manner the same is to be performed, I declare that what I claim is :-
-
In combination with a grain drying centrifugal hydro extractor a pair of semi-
circular brushes carried by pairs of sleeves which slide on transverse rods being

page_text: attached to continuously travelling chains and guided in their descent by vertical
guide bars, the whole arranged and operating substantially as and for the purpose
set forth.
Dated this 30th dove of Cunt 1907
ABEL & IMRAY,
Agents for the Applicant.