Year: 1895

page_text: Date of Application, 2nd July, 1895-Accepted, 3rd Aug., 1895
We, JOSEF LIPA and ALOIS CIZINSKY, both of Vranan, Bohemia, Gentlemen,
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 :-
Our invention relates to grinding-mills and comprises a vertical and conical
hollow grinding cone, which is preferably made of steel, but which may be of any
resisting material, and which is provided inside with a centrifugal regulator for its
automatic control and provided also with devices for exactly regulating the
ordinary work apart from the automatic regulation by means of the "centrifugal
regulator."
In the accompanying drawings:
Figure 1 shows a mill constructed according to this invention, in vertical central
section,
Figure 2 is a plan of the same mill with certain of the upper parts removed.
Figures 3 and 4 show in sectional elevation and in plan respectively, an
arrangement of vertical auxiliary cones,
Figures 5 and 6 are a vertical and horizontal section respectively, of an
arrangement of horizontal auxiliary cones,
Figure 7 is a shaker, principally for semolina and similar goods:
Figure 8 indicates the positions of the grinding teeth in the apparatus to be
hereinafter described.
Like letters indicate like parts throughout the drawings.
1 is a vertical shaft, the which may be conveniently journalled with its pin 15
in the spherical bearing 16 upon the lever 17 for instance; this shaft has a fast
driving pulley 5 and a loose pulley 6 thereon. Upon the shaft 1 there is a conical
hollow grinder A mounted with a feather key (not shown in the drawing) so that
it turns with this shaft 1 and at the same time is allowed to move up and down
upon same. This grinder is held between two spiral or other convenient springs 11
and 12 which bear against the plates 13 and 14 retained in position by nuts 9
and 10 upon threaded parts 7 and 8 of said shaft. 1.
A centrifugal regulator is conveniently located inside the grinding cone A being.
for instance mounted between two rings 27 and 35 the latter being free and the
former being fastened upon the shaft 1.
33 and 34 are the usual balls or weights of the regulator 31-32-29-30 being
its link parallelogram, the which is binged as is customary. The weight of the
grinding cone A is taken upon the movable ring 35 by means of the arms 37
which form part of the cone, and it therefore acts upon the spring 12. If the
velocity of the grinding cone A increases beyond a certain limit, the action of the
centrifugal force of the regulator will lift the ring 35 and therefore also the grinding
cone A. This cone being surrounded by a fixed grinding case a preferably made
internally, with a somewhat steeper side the grinding surfaces of these two grinding
pieces A and a will approach each other and the grain which is ground between
them will act like a brake upon the grinder. If the velocity is smaller than the
one for which the machine is adjusted, the grinder A will sink down, the resistance
will diminish aud therefore the velocity must increase.
It will be understood that the grinding surfaces are provided with convenient
grinding teeth. In Figure 8 the parallel lines 72 indicate for instance the grinding

page_text: The teeth upon the inside surface of its nxed
casing.
For the purpose of catching up iron and similar heavy pieces before they fall
between the grinding surfaces a and A, the grain, semolina or other matter to be
ground, falls on to the plate 25 hefore reaching the grinders. The plate 25 is
fastened to the shaft and is provided with flanges 26. It is filled with semolina
and the iron pieces which fall from above burrow into the semolina or other
granular material and keep in it, so that from time to time they can be taken out,
whilst the grain or semolina which is to be ground, runs in a regular way over the
rim of the plate 25 into the grinders.
24 and 23 are respectively the knocker and the ratchet wheel of a well known
rattler or shaking arrangement for the feeding hopper 20 which is suspended by
flexible suspenders 21 and 22; it is understood that this hopper can be arranged
in any other convenient manner.
An automatic disengager of the running grinder in case of the fixed hopper, 19
being emptied, can for instance be arranged, so that the contents of the hopper,
as long as it is not empty, by their weight press down an arm or plate 38 of a
lever which is indicated diagrammatically and has its fulerum at 39 and a counter-
weight at 40; an arm 41 of a pawl 43 of a ratchet wheel 44 which pawl has its
axis at 42, is being pressed by the weight of the pawl or any other appropriate means
against the counterweight or pulley 40. As long as the plate arm 38 is kept down
by the weight of the material reposing upon it, the pawl 43 will gear with the
ratchet wheel 44, upon which at 46 hangs a vertical bar 49 which is attached at 48
to the horizontal beam 17 which latter supports the shaft 1 and has its fulcrum
at 55 at the lower end of the vertical bar 56 which can be lowered or lifted up by
means of a wheel nut and screw 58, 57 or otherwise. The vertical bar 49 is at 50
carried by a lever 53 having a fixed fulcrum at 52 which lever is provided with
a counterweight 54. By pressing down the counterweight 54 both the points 48
and 46 will be lifted and therefore the shaft 1 with its grinder A will mount
higher into the fixed casing a so that the material which falls between the two
grinding surfaces A and a will be ground finer. The pawl 43 holds the ratchet
wheel and therefore also the grinder A in its position, whilst by turning the hand
wheel 58 to one or the other side, the position of the revolving grinder A can be
easily regulated for each special work or material. When the grain or semolina
in the hopper 19 is emptied and therefore its weight does not press the plate 38
down any longer the counterweight 40 falls and disengages the pawl 43 from the
ratchet wheel 44, the points 46 and 48 fall, and the grinder A falls too, leaving
space between A and a so as not to grind when there is no grain in the hopper.
The cone can be easily lifted up again by pressing down the counterweight 54.
Auxiliary vertical or horizontal cones B C D Figures 3 to 6 the which are
tangent to the grinding cone A, may be used especially for grinding fine or
hygroscopical goods. In this case the main casing a must be interrupted in the
neighbourhood of the auxiliary cones, the which receive simple sheet iron casings b,
these being united with the casing a as closely as is required. The spindles of
these cones are marked 2 3, 4 and the gearing from the shalt 1 is, to give an
example, shown by Figure 3 of the drawings, though it can be arranged in any
other convenient way.
In the grinding of semolina or of similar goods which fall from a bin such as 19
through a funnel such as 61 we use a shaker as shown for instance in Figure 7.
Upon the shaft 1 is fastened a ring 59 fitted with an inclined groove 60 into which
gears the end 62 of a small lever having its fulerum stationary at 63; the grooved
ring at each revolution of the shaft 1 moves a vertical bar 65 up and down, this bar
being hinged to said lever at 64 and being guided in a guide 66. A horizontal
tever, which has its fulcrum 68 upon the bin 19, is hinged to the bar 65 at 67 and
moves with its other end 69 (which is inside the bin 19) a vertical bar 70 which
is provided with horizontal arins 71 which cause the material in the hopper to fall
regularly down into the grinder.

page_text: Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :-
1. A grinding machine in which a cone in a conical case of different conicity
can be regulated by lifting or lowering a supporting beam by means of a threaded
wheel 58 or otherwise and which besides this is regulated automatically by a
centrifugal regulator acting upon a sliding ring 36 which carries the weight of the
grinding cone said grinding cone being mounted upon its shaft by means of a sunk
feather or its equivalent and preferably also between springs which can be adjusted
by means of appropriate nuts upon the shaft substantially as set forth.
2. In a grinding machine the arrangement for the purpose of catching up the
pieces of iron and other heavy material of a catching plate 25 fastened upon the
shaft 1 under the feeding hopper and over the grinding cones and adapted to be
filled with the semolina or the like so as to catch the heavy pieces and let the
lighter goods run regularly over its rim down between the grinding surfaces,
substantially as set forth.
3. The grinding machine substantially as and for the purpose hereinbefore
described with reference to Figures 1 and 2 or Figures 3 and 4 or Figures 5 and 6
of the accompanying drawings.
Dated this 2nd day of July 1895.
BOULT & WADE,
Agents for the Applicants.