IMPROVEMENTS IN MACHINERY FOR HULLING OR TREATING GRAIN
Year: 1870

page_text: PROVISIONAL SPECIFICATION left by Robert Young at the Office
of the Commissioners of Patents, with his Petition, on the 4th
1. March 1870.
I, ROBERT YOUNG, of Glasgow, in the County of Lanark, North:
Britain, Engineer, do hereby declare the nature of the said Invention
for "IMPROVEMENTS IN MACHINERY FOR HULLING OR TREATING GRAIN," to be
as follows, that is to say :-
This Invention relates to improved machinery for so treating grain as
to hull it or partially hull it, or as it is otherwise sometimes termed to
"end," "score," or "clean" it, and the improved machinery comprises a
cylindrical or slightly tapered casing, consisting of an external framing
with a shell of sheet metal that has its inner surface roughened by its
being perforated or otherwise, the perforations being too small for the
exit of the grain. Within the casing there is a cylinder with closed.
ends and with a roughened surface, which is carried on a longitudinal
shaft, and is made to rotate rapidly whilst the grain passes gradually
from one end of the casing to the other between the casing and the
inner cylinder, entering by an inlet opening at one end, and being
discharged at the other end through an outlet, which is fitted with a

page_text: regulating valve. This discharge regulating valve is to be so adjusted
as to keep the casing choke full of the grain in order that the intended
action on the grain may take place.
The roughened surface of the inner cylinder is obtained according to
one modification by fixing upon it strips of perforated or otherwise
roughened sheet metal, which may be combined with combs of wire set
to project slightly out from the surface of the sheet metal. As the
points of the combs gradually wear in use provision is made for
re-adjusting them. For this purpose the backs or solid parts of the
-combs-are-formed with small longitudinal grooves on one side, and
corresponding grooves are formed on the sides of wooden staves of
which the cylinder is built up; and when the points of the combs are
worn the stayes are loosened and the combs are shifted further out.
By another modification the roughened surface of the cylinder is
obtained by fixing dense compact brushes of wire upon the wooden
staves. Instead of the inner surface of the casing being roughened all
over, the roughening may be confined to a narrow longitudinal strip,
and in that case it may be obtained by arranging wire combs with their
points projecting through perforated sheet metal, such combs being
adjustable inwards as their points wear by screws applied externally.
The inner cylinder is by preference placed slightly to. one side of the
axis of the casing so that the space between the two is narrower at one
part, which is the roughened part, in cases wherein the whole surface
is not roughened. This arrangement intensifies the action at one part,
and at the same time allows freer space for the grain to work round
again to that part. Wire cloth, and by preference such as is made of
prismatic wire, may be used for the roughened surfaces of the casing or
inner cylinder or both.
The improved machinery may be used for treating dry grain or grain
that has been more
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