IMPROVEMENTS IN APPARATUS FOR DECORTICATING AND CLEANING RICE AND OTHER GRAIN
Year: 1877

page_text: LETTERS PATENT to George Henry Carbutt, of Great Tower Street, in the
City of London, for the Invention of "IMPROVEMENTS IN APPARATUS FOR
DECORTICATING AND CLEANING RICE AND OTHER GRAIN."
Sealed the 18th December 1877, and dated the 9th October 1877.
PROVISIONAL SPECIFICATION left by the said George Henry Carbutt
at the Office of the Commissioners of Patents on the 9th October 1877.
GEORGE HENRY CARBUTT, of Great Tower Street, in the City of London.
"IMPROVEMENTS IN APPARATUS FOR DECORTICATING AND CLEANING RICE AND
OTHER GRAIN."
My Invention relates to improvements in apparatus for decorticating and cleaning
rice and other grain, whereby great simplicity of construction in the apparatus, con-
bined with increased efficiency in operation is obtained, and it consists in the
employment of a drum of a conical or other shape, constructed or covered with the
peculiar cement or composition herein-after described, and mounted on a vertical
shaft or axis within a casing of a corresponding forin, constructed either of a wire
gauze, perforated metal, or any suitable reticulated material, or constructed of or
lined with the said peculiar cement or composition herein-after described.
The shaft is supported in bearings, so as to be capable of being raised or lowered
for the adjustment of the space or distance between the sides of the druin and the
casing, to suit variations in the description of grain to be operated upon, and it
carries pullies for receiving motion from any suitable prime mover, and on the
apparatus being put into operation the grain, which is introduced at the upper end,
is acted upon between the sides of the revolving drum and those of the casing, and
finally escapes at the lower end in a decorticated and clean condition.
The cement which constitutes the surfaces of the improved apparatus is composed
of chloride of magnesium together with magnesia, and to which either sand, emery, or
other hard substance is added, so as to render the surfaces suitable for the purposes
to which they are to be applied. The proportions in which I employ the

page_text: materials or compounds constituting the surface or surfaces will vary, according
to the grain it is desired to treat, but I have found that a cement composed in
about the following proportions will give good results :-
Magnesia, about 9 parts, by weight; a solution of chloride of magnesium, marking
about 30° Beaumé, 9 parts, by weight; sand, emery, or other hard substance, 42
parts, by weight.
Carbonate of magnesia may in part be substituted for the magnesia referred
to, but I prefer to use magnesia.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said George Henry Carbutt in the Great Seal Patent Office on the
29th March 1878.
GEORGE HENRY CARBUTT, of Great Tower Street, in the City of London.
"IMPROVEMENTS IN APPARATUS FOR DECORTICATING AND CLEANING RICE AND
OTHER GRAIN."
My said Invention relates to improvements in apparatus for decorticating and
cleaning rice and other grain, whereby great simplicity of construction in the appa-
ratus, combined with increased efficiency in its operation, is obtained, and it
consists in the employment of a drum of a conical or other suitable shape, con-
structed of or covered with the peculiar cement or composition herein-after
described, and mounted on a vertical shaft or axis (to which a rotatory motion is
imparted) within a casing of a corresponding form, constructed either of wire gauze,
perforated metal, or any suitable reticulated material; or constructed of or lined
with the said peculiar cement or composition herein-after described, the rice or
other grain being decorticated and cleaned by being operated upon between the
exterior of the drum and the interior of the casing.
The cement which constitutes the acting surface or surfaces of the improved
apparatus is composed of chloride of magnesium together with magnesia, to which
either sand, emery, or other hard substance is added, so as to render the surface or
surfaces suitable for the purposes to which they are to be applied. The proportions
in which I employ the materials or compounds constituting the acting surface or
surfaces will vary according to the grain it is desired to treat, but I have
found that a cement composed in about the following proportions will give good
results, videlicet :—
Magnesia, about
A solution of chloride of magnesium,
marking about 30° Beaumé
Sand, emery, or other hard substance
-
9 parts, by weight.
9
do.,
do.
42
do.,
do.
Native carbonate of magnesia or magnesite may in part be substituted for the
calcined or caustic magnesia referred to, but I prefer to use the calcined or caustic
magnesia.
The accompanying Drawings represents in vertical section one form of apparatus,
- goid Invention
results, videlicet :—
Magnesia, about
A solution of chloride of magnesium,
marking about 30° Beaumé
Sand, emery, or other hard substance
9 parts, by weight.
9
do.,
do.
-
42
do.
do.,
Native carbonate of magnesia or magnesite may in part be substituted for the
calcined or caustic magnesia referred to, but I prefer to use the calcined or caustic
magnesia.
The accompanying Drawings represents in vertical section one form of apparatus,
id Invention

page_text: A is the drum, made of a conical form, and composed of a body a of wood or other
suitable material, covered on its sides with a layer a' of the cement or composition,
herein-before described; B is the casing, surrounding the said drum, and of a form
corresponding thereto, which casing is composed of a body b of wood or other
suitable material, and a lining b' of wire gauze or perforated metal, or of the cement
or composition, herein-before described. The drum is mounted fast upon a vertical
shaft C, which is supported in an upper bearing c and a footstep bearing c¹, and
carries a pulley D for receiving motion from any suitable prime mover.
The grain to be operated upon is introduced into the apparatus at the upper end
thereof through a shoot E, and the shaft C having been put in motion the
grain is acted upon between the sides a of the revolving drum A and those b¹
of the casing B, and is finally discharged in a decorticated and clean condition
through a shoot E' into any convenient receptacle.
The space or distance between the sides a¹ of the drum A. and those b¹ of the
casing B, may be regulated at will to suit variations in the description of grain to be
operated upon by raising or lowering, as required, the footstep bearing c¹, by means
of a non-rotating screw d, operated by a hand wheel or nut e.
Having now described and particularly ascertained the nature of my said Inven-
tion and the manner in which the same is or may be used or carried into effect, I
would observe in conclusion that what I consider to be novel and original, and
therefore claim as the Invention secured to me by the herein-before in part recited
Letters Patent is,―
First. The peculiar construction of apparatus for decorticating and cleaning grain
as herein-before described.
Second. The application of the cement, herein described, for the construction of
the decorticating and cleaning surfaces, as herein-before described.
In witness whereof, I, the said George Henry Carbutt, have to this my
Specification set my hand and seal, the Eleventh day of March, One
thousand eight hundred and seventy-eight.
Signed in the presence of
JOSEPH T. MORRELL,
6, Portland Place,
Rotherhithe,
GEORGE HENRY CARBUTT. (L.S.)
Merchant's Clerk.