Improvements in Machinery and Appliances for Crushing and Grinding.
Year: 1891

page_text: Date of Application, 18th Mar., 1891
Complete Specification Left, 18th Jan., 1892--Accepted, 27th Feb., 1892
PROVISIONAL SPECIFICATION.
Improvements in Machinery and Appliances for Crushing and
Grinding.
I ROBERT STONE of St. Dunstans Buildings London E.C. Engineer do hereby
declare the nature of said invention to be as follows:
--
First. The crushing consists of two or more heavy rolls or drums made from
steel or iron, or other hard material, one running at a higher speed than the other,
round these rolls or druins I sink or form corrugations or grooves which fit into
each other, I sometimes make one large roll or drum with corrugations or grooves
round which I fix one or more smaller rolls or drums, which are also corrugated
or grooved to fit into the large roll or drum, in order to secure several crushings
by the one action. On the large roll or drum I fix a cog wheel which works the
small cog wheels, fixed on the small rolls or drums, when crushing grain or seeds
or any material or substance requiring a tearing action I form teeth in the
corrugations or grooves of the rolls or drums.
Secondly. My improved extra fine grinding machine consists of a large plain
roll, turned on the face. Round this roll I fit one or more rolls, running at a
higher speed, in order to secure several grindings by the one action on the large
roll I fit a cog wheel, which works into the cog wheels of the smaller rolls. By
this method extra fine grinding is secured.
Thirdly. I sometimes use a barrel or partly ball shaped roll, working against
a bed or grinding plate, shaped to the barrel or partly ball shaped roll. This bed
plate may be stationary, or worked by a cam or spring or buffer, or I may work
the barrel or partly ball shaped roll, into a curved shaped roll, in order to secure
fine grinding, one roll to run at a higher speed than the other, this curved shaped
roll by preference to the much larger in diameter than the barrel, or partly ball
shaped roll, I prefer. the barrel or partly ball shaped rolls to run at the high
speed, or I may run one or more small barrel, or partly ball shaped rolls, round the
curved roll at a high speed.
Dated 18th March 1801
COMPLETE SPECIFICATION.
Improvements in Machinery and Appliances for Crushing and
Grinding.
I, ROBERT STONE, of St. Dunstans Buildings, London. E.C. Engineer, do
hereby declare the nature of my paid invention and in what manner the same is
to be performed, to be particularly described and ascertained in and by the following
statement:-
First. The crushing machinery consists of 2 or more heavy rolls or drums, made
from steel or iron, or other hard material, one running at a higher speed than the
other. Round these rolls or drums I sink or form corrugations or grooves which
fit into each other. I sometimes make one large roll or drum with corrugations or
grooves round which I fit one or more smaller rolls or drums, which are also
corrugated or grooved to fit into the large roll or drum, in order to secure several
crushings by the one action. On the large roll or drum I fit a cog wheel which
works the small cog wheels, fixed on the small rolls or drums; when crushing grain
or seeds, or any material or substance requiring a tearing action I form teeth in
the corrugations or grooves of the rolls or drums.

page_text: Secondly. My improved extra fine grinding machine consists of a large plain
roll, turned on the face. Round this roll I fit one or more rolls, running at a
higher speed, in order to secure several grindings by the one action on the large
roll I fit a cog wheel, which works into the cog wheels of the smaller rolls. By
this method extra fine grinding is secured.
Thirdly. I sometimes use a barrel or partly ball shaped roll, working against a
bed or grinding plate, shaped to the barrel or partly ball shaped roll. This bed
plate may be stationary, or worked by a cam or spring or buffer, or I may work
the barrel or partly ball shaped roll, into a curved shaped roll in order to secure
fine grinding, one roll to run at a higher speed than the other; this curved
shaped roll by preference to be much larger in diameter than the barrel or
partly ball shaped roll. I prefer the barrel or partly ball shaped rolls to run at
the high speed, or I may run one or more small barrel, or partly ball shaped
rolls, round the curved roll at a high speed.
When the material to be crushed or ground is required to be in a calcined
or burnt condition I use the furnaces described in my Patent No. 116 of 1889.
And in order that my said invention may be particularly described and
ascertained reference is hereby made to the accompanying drawings in which
similar letters of reference indicate corresponding parts.
Fig. 1 is a sectional elevation and
Fig. 2 an end view of the corrugated crushing rolls.
Fig. 3 shows another form of crushing and grinding mill.
Fig. 4 shows a barrel shaped roll working against a curved roll.
Figs. 5 and 6 show another form of grinding apparatus.
I prefer running the
My improved crushing rolls consist of two heavy rolls with annular corruga-
tions working into each other as shown in Figs. 1 and 2.
rolls at different speeds to ensure fine grinding.
In some cases I use one large roll with one or more roll or rolls of smaller
diameters, as shown in Fig. 3 in which a¹ is the large roll and e. e are smaller
rolls. is a hopper for feeding the materials to the rolls. By this arrangement
the materials are gradually reduced to any degree of fineness required.
I sometimes use a barrel shaped roll working against a curved roll as shewn in
Fig. 4 one roll being driven at a higher speed than the other.
Figs. 5 and 6 show another form of grinding apparatus. a is a barrel shaped
roll is a trough pivotted at c and d is an eccentric by which the position of the
trough relatively to the roll a can be regulated as desired.
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 :
The improvements in machinery and appliances for crushing and grinding
substantially as herein before described and shown on the drawings.
Dated 18th January 1892.
ROBERT STONE.