IMPROVEMENTS IN APPARATUS FOR CRUSHING GRINDING OR PULVERISING CEMENT, LIME, STONE OR OTHER MATERIAL
Year: 1883

page_text: LETTERS PATENT to Henry Harris Lake of the firm of Haseltine Lake
& C° Patent Agents Southampton Buildings London for an Invention of
"IMPROVEMENTS IN APPARATUS FOR CRUSHING GRINDING OR PULVERISING
CEMENT, LIME, STONE OR OTHER MATERIAL " Communicated to him from
abroad by Claudius Jouffray, of Vienne, France, Engineer
PROVISIONAL SPECIFICATION left by the said Henry Harris Lake at
the Office of the Commissioners of Patents on the 18th January 1883.
HENRY HARRIS LAKE of the firm of Haseltine, Lake, and C, Patent
Agents, Southampton Buildings, London, "IMPROVEMENTS IN APPARATUS FOR
CRUSHING GRINDING OR PULVERIZING CEMENT, LIME, STONE, OR OTHER MATERIAL
23
[A communication to him from abroad by Claudius Jouffray, of Vienne, France,
Engineer]
"
This invention relates to apparatus for crushing or grinding cement, lime, stones
or other materials which do not form a consistent paste when subjected to crushing
or grinding..
In carrying the said invention into practice I provide a cast iron roller fixed
upon a abaft to which motion is imparted by any suitable means. A movable
annular shell or hollow cylinder of cast iron or steel rests freely upon the said
roller, and upon the interior of this shell a grinding roller rests freely. I also
provide guide-rollers for maintaining the said shell or cylinder in its proper position
during the movement thereof; these guide-rollers are supported by standards or
other suitable means. An inlet pipe is provided for the material to be crushed or
ground, and there are scoops or buckets furnished externally with wire gauze.
The material which has passed under the grinding rollor falls into the said scoops
or buckets which raise and throw back under the said roller, all the pieces which
are still too large. The smaller pieces pass through the wire gauze and fall into
a receptacle.below; whence they are conducted to sorting bolting mills in any
suitable manner. Pipes are, moreover, provided for the return of the imperfectly
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page_text: crushed material which is brought from the bolting apparatus, to the said shell
or cylinder to be again crushed between it and the roller, together with the
ordinary charge of material The grinding and other rollers are sometimes made
in two pieces viz-a permanent core and a bard metal ring keyed upon the same
These rings, as well as the said shell or cylinder, are provided with grooves
which produce a squeezing action upon the material to be crushed.
In order to facilitate the arrival of the material to be crushed under the shell
or cylinder, the driving roller is placed slightly out of the vertical line passing
through the axis of the said cylinder. This arrangement may be unnecessary for
materials which slide easily, and in such case the whole apparatus would be
symmetrical relatively to the axis of the roller
The details of construction may be varied according to the nature of the
material to be operated upon, and other circumstances; the main features of the
apparatus being the annular shell or cylinder resting upon a roller and enclosing
a grinding roller
The said apparatus may, if desired, be made of large size, and the said shell may
enclose two or more grinding rollers
SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Henry Harris Lake in the Great Seal Patent Office on the
18th July 1883.
HENRY HARRIS LAKE, of the firm of Haseltine Lake & Co Patent Agents,
Southampton Buildings, London "IMPROVEMENTS IN APPARATUS FOR CRUSHING,
"
A
GRINDING OR PULVERIZING CEMENT, LIME, STONE OR OTHER MATERIAL
communication to me from abroad by Claudius Jouffray, of Vienne, France,
Engineer,
This invention relates to apparatus for crushing or grinding cement, lime, stones
or other materials which do not form a consistent paste-when subjected to crushing
or grinding.
In the accompanying drawings
Figure 1 is a longitudinal vertical section of grinding apparatus_constructed
according to this invention.
Figure 2 is a transverse section of the same.
Figure 3 is a diagram illustrating a modification of this invention.
Figure 4 is a plan partly in section of the said modification.
Figure 5 is a sectional elevation, and
Figure 6 is a transverse section of the same.
In carrying the said invention into practice I provide a suitable frame A,
supporting in bearings B a shaft C (to which motion is imparted by any suitable

page_text: means) having mounted upon it a cast iron roller D. A movable annular shell
or hollow cylinder E of cast iron or steel rests freely upon the roller D, and upon
the interior of this shell a grinding roller F rests freely
GG are guide-rollers for maintaining the said shell or cylinder E in its proper
position during the movement thereof; these guide rollers are supported by
standards or other suitable means.
His an inlet pipe for the material to be crushed or ground and I I are scoops
or buckets furnished externally with wire gauze K. The material which has
passed under the grinding roller F falls into the said scoops or buckets I I which
raise and throw back under the said roller all the pieces which are still too large
to pass through the gauze K. The smaller pieces pass through the said gauze
and fall into a receptacle L below, whence they are conducted to sorting bolting-
mills in any convenient manner. Suitable pipes are, moreover, provided for the
return of the imperfectly crushed material, which is brought from the bolting
apparatus, to the shell or cylinder E to be again crushed between it and the
roller F together with the ordinary charge of material. The grinding and other
rollers are preferably made in two pieces, vis: a permanent core, and a hard metal
ring keyed upon the same as shown in Figures 1 and 2. These rings, as well as
the said shell or cylinder, are provided with grooved or corrugated surfaces which
produce a squeezing action upon the material to be crushed.
In order to facilitate the arrival of the material to be crushed under the shell
or cylinder, the driving roller is placed slightly out of the vertical line passing
through the axis of the said cylinder.
This arrangement, may be unnecessary for materials which slide easily and in
such case the whole apparatus would be symmetrical relatively to the axis of the
roller.
According to a modification of this invention the grinding roller is mounted
upon an axle the bearings of which are in a lever which is jointed to the main
frame of the machine.
The principle of this modification is illustrated in Figure 3. Wherein a, b, d
indicate a lever, a a fixed point, which forms the fulcrum of the said lever, b the
point upon the lever a b d where the grinding roller is journalled and ₫ the point
upon which the weight P acts; c indicates the bearing of the driving roller.
It will be observed that the line b c is nearly vertical and the line a b d nearly
horizontal. Under these conditions, if the hollow cylinder had no weight it is
obvious that the contact points m and n of the grinding and driving rollers with
the hollow cylinder would in this case be situated upon the line bc. If, on the
contrary, the hollow cylinder had considerable weight in comparison to the weights
on the lever a b d the hollow cylinder would revolve upon the periphery of
the roller whilst raising the grinding roller until, the contact points between
the hollow cylinder and the grinding roller approached the line a b d, the weight
of the said hollow cylinder was equilibrated by the reaction of the lever. In
practice the weight of the internal grinding roller and the weight P applied upon
the end of the lever are sufficient as compared with the weight of the hollow
cylinder, to prevent the contact points m and n from diverging far from the
line b c.
Under these conditions if the effect produced by a displacement of the hollow
cylinder were examined it would be found that the moment which tends to bring
the said hollow cylinder back into its normal position increases rapidily as the
displacement of the said cylinder increases. Under the influence of any sudden
strain the hollow cylinder will move vertically and return after a few oscillations
to the point of equilibrium. If the effort tending to displace the hollow cylinder
from its equilibrium results from the passage of a hard body between the grinding
roller and the hollow cylinder during its movement the said hollow cylinder tends
to move perpendicularly which is highly favorable to grinding operations.
It is obvious that by increasing or decreasing the weight P, the production of
the apparatus, and the state of the material ground may be varied.

page_text: The application of this principle is shown in Figures 4, 5 and 6 in which
A indicates the main frame of the machine carrying the shaft C to which is fixed
a cast iron or steel roller D upon which runs an annular shell or hollow cylinder E
of cast iron or steel provided externally and internally with cheeks or flanges.
Between the inner flanges runs a grinding roller F mounted upon the shaft G¹
having bearings in the levers H'H', pivotted to the frame A. The said levers
are secured together and rendered rigid by means of a block or box H" of metal
or other suitable material to which an additional weight can be added if desired.
The material to be ground is introduced to the rollers by means of a pipe or
a vibrating apparatus, according to circumstances and the nature of the material.
The ground material falls upon the roller F from which it is carried by ordinary
-means such as a screw, elevators, or the like, to sorting and bolting machines.
The insufficiently ground material may be brought back and introduced between
the lower roller D and the hollow-cylinder E by means of the inclined plane M or
by a pipe, this material being thus subjected to a further pulverization.
A wooden casing N N, is provided for covering the apparatus, and pieces of
timber O for supporting the cast iron frame.
The details of construction may be varied according to the nature of the materiál
to be operated upon, and other circumstances, the main features of the apparatus
being the annular shell or cylinder resting upon a roller and enclosing a grinding
roller. The said apparatus may, if desired, be made of large size and the said shell
may enclose two or more grinding rollers.
Having thus fully described the said invention as communicated to me by my
foreign correspondent, and the manner of performing the same, I wish it understood
that I claim:—
In a crushing, grinding or pulverizing apparatus, the employment of an annular
shell or hollow cylinder bearing upon a roller and having within it a grinding
roller, (with or without the pivotted lever) substantially as, and for the purposes,
specified.
In Witness whereof I the said Henry Harris Lake have hereunto set my hand
and seal this eighteenth day of July in the year of our Lord One thousand
eight hundred and eighty three
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