Improvements in Rice and other Mills.
Year: 1890

page_text: Date of Application, 23rd Apr., 1890
Complete Specification Left, 8th Oct., 1890-Accepted, 8th Nov., 1890
PROVISIONAL SPECIFICATION.
Improvements in Rice and other Mills.
I DONALD CAMERON of Victoria Chambers 55 & 56 Chancery Lane in the County
of London, Manager, do hereby declare the nature of this invention to be as
follows:-
This invention has reference to certain new and useful improvements in mills for
pulverising rice and other articles of this nature. The invention consists of two or
more mortars or receptacles mounted upon a metal stand or framework. In the lower
part of this stand is journalled a shaft carrying a driving pulley, and two crank-discs-
one at each end of the shaft. A rod passes through an aperture in the bottom of
each mortar and is suitably secured at its upper end to a pestle provided with an
annular ring or flange, or formed at its lower part with an integral annular flange-
the upper face of which is at right angles to the longitudinal centre or axis of the
pestle. At the lower end of each rod carrying a pestle is a suitably formed piece of
metal adapted to engage with a guide upon the stand. A pitman connects the lower
extremity of each rod to a pin upon each of the crank discs, in such manner that when
they are rotated the pestles are raised and lower respectively upon the rice, grain or
other matter in the mortars or receptacles.
Dated this 23rd day of April 1890.
DONALD CAMERON,
Applicant.
COMPLETE SPECIFICATION.
Improvements in Rice and other Mills.
I, DONALD CAMERON, of No. 20 and 21 Victoria Chambers, 55 and 56 Chancery
Lane, London, in the County of London, Manager, do hereby declare the nature of
this invention, (a communication to me from abroad by Nathaniel Tilton, of Savannah,
Georgia, U.S.A.) to be as follows :-
This invention relates to boots or pestles driven by power and mainly designed to
be used in mills for pounding rice; and the invention consists in a novel construction
of the boot or pestle, substantially as hereinafter described, and pointed out in the
claims, whereby the rice or grains thereof are more perfectly agitated and made to
clean one another and packing of the same with or by the pestle is avoided.
Reference is to be had to the accompanying drawings, forming a part of this
Specification, in which similar letters of reference indicate corresponding parts in all
the figures.
Figure 1 represents a mainly sectional elevation on the line xx in Fig. 2, of a
double pestle rice-mill with my improved boot or pestle applied.
Fig. 2 is a plan view of the same; .
Fig. 3, a horizontal section upon the line y y in Fig. 1.
Fig. 4 is a view in perspective of one of my improved boots or pestles and stem
thereof in part.
with a
A indicates the frame of a rice-pounding mill having two mortars B B,
vertically-reciprocating boot or pestle for each. The pestle is provided with a
longitudinal bore and a lateral intersecting aperture.
DD are the stems by which the pestles are carried, and on which they are adjust-
able up or down by means of nuts bb fitting screw-threads on the stems, to regulate
the pounding action of the pestles. These stems D D, which work through the
bottoms of the mortars, are connected below with sliding cross-heads E E, which in
their turn are reciprocated up and down by connecting-rods F F, worked by cranks G G
ID 1

page_text: on a shaft H, that is rotated by a wheel or pulley I. The cranks G G are set opposite
to each other, so that as the one pestle is moved up the other pestle is moved down,
and vice versa, thereby producing a balancing action of the pestles.
Each pestle C is provided at or near its base with an externally-surrounding flange d,
having a flat upper face which, serves the purpose as the pestle rises of taking up the
rice from the bottom of the mortar, and as the pestle moves up and down of keeping
the rice in such motion that the grains will clean one another and the rice will not
pack with the boot or pestle. As in working two pestles, as described, the one rising
while the other is filling, the balance of the pestles will not be interfered with by the
lifting and agitating action, on the rice of the flanges of the pestles, and said flanges,
besides having the effects before stated, admit of the boots or pestles being worked
faster.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is:
1. In a rice-mill, a conical pestle having an annular ring or flange, the upper face
of which is flat and at right angles to the longitudinal centre or axis of the pestle,
substantially as set forth.
2. In a rice mill, a conical pestle having an integral annular flange d at its base, the
upper face of the flange being at right angles to the longitudinal centre or axis of the
pestle, substantially as set forth.
3. In a rice-mill, a conical pestle formed with a longitudinal bore, a lateral opening
intersecting the same, and an integral flange d around its base, and having a flat upper
face at right angles to said bore, substantially as set forth.
Dated this 8th day of October 1890.
DONALD CAMERON,
Applicant.