AN IMPROVED MILI. FOR CRUSHING OR GRINDING HARD MATERIALS
Year: 1884

page_text: PROVISIONAL
SPECIFICATION.
I, BENJAMIN JOSEPH BARNARD MILLS of the firm of Harris and Mills of
23 Southampton Buildings in the County of Middlesex, Patent Agent, do hereby
declare the nature of said invention for AN IMPROVED MILI. FOR CRUSHING OR
GRINDING HARD MATERIALS, a communication to me from abroad by Charles Morel
of Grenoble, Isère in the Republic of France, Mechanician, to be as follows:-
This improved crusher or grinder has for its object the crushing and grinding of
all kinds of solid matters such as cement for example.
It is formed of a mill stone or wheel turning around a horizontal axis and of
smaller cylinders the axes of which are also horizontal and arranged around the
descending part of the mill-stone or wheel in such manner as to form with it a
series of rolling mills of gradually diminishing entry which can be regulated
according to the nature of the matter to be crushed or ground. The first of these
cylinders can bo placed vertically above the axis of the mill stone or wheel the
others are placed in a series on the side where the mill-stone or wheel descends, the
matters delivered to the upper part pass successively into the rolling mills thus
formed, are first crushed by the first then reduced into powder of finer and finer
character by the following.
In order that the matter may not be thrown about, the mill-stone or wheel or
the cylinders will be provided with fixed discs, or will turn between fixed sides, the
mill stone or wheel and the cylinders will be formed of stone, metal, or composition
appropriate to the nature of the matters to be ground, their surface will be smooth,
fluted or grooved, they will be capable of turning with the same speed, or at
different speeds by means of straps, gearing or other means.
The advantage of this system is to operate gradually, each rolling mill, acting
upon matters already prepared by the preceding ones, can neither get crammed nor
be submitted to violent efforts; if the material is wanting or if it has not sufficient
size to be crushed by some of them, the corresponding cylinders have no work and
do not consume the motive power.
A perfect crushing is obtained by this means and rapidity of work with great
economy of motive force.

page_text: COMPLETE SPECIFICATION.
I BENJAMIN JOSEPH BARNARD MILLS of the firm of Harris and Mills of
28 Southampton Buildings in the County of Middlesex, Patent Agent, do hereby
declare the nature of the said Invention for AN IMPROVED MILL FOR CRUSHING
OR GRINDING HARD MATERIALS a communication to me from abroad by Charles
Morel of Grenoble, Isère in the Republic of France, Mechanician to be as
follows:-
This improved crusher or grinder has for its object the crushing and grinding of
all kinds of solid matters such as cement for example.
It is formed of a mill stone or wheel turning around a horizontal axis and of
smaller cylinders the axes of which are also horizontal and arranged around the
descending part of the mill stone or wheel in such manner as to form with it a
series of rolling mills of gradually diminishing entry which can be regulated
according to the nature of the matter to be crushed or ground.
The first of these cylinders can be placed vertically above the axis of the mill
stone or wheel the others are placed in a series on the side where the mill stone or
wheel descends, the matters delivered to the upper part pass successively into the
rolling mills thus formed, are first crushed by the first then reduced into powder of
finer and finer character by the following.
In order that the matter may not be thrown about, the mill stone or wheel or
the cylinders will be provided with fixed discs, or will turn between fixed sides, the
mill stone or wheel and the cylinders will be formed of stone, metal, or composition
appropriate to the nature of the matters to be ground, their surface will be smooth,
fluted or grooved, they will be capable of turning with the same speed or at
different speeds by means of straps, gearing or other means.
The advantage of this system is in operating gradually, each rolling mill acting
upon matters already prepared by the preceding ones can neither get choked nor be
submitted to violent efforts; if the material is wanting or if it has not sufficient
size to be crushed by some of them, the corresponding cylinders have no work and
do not consume the motive power.
A perfect crushing is obtained by this means and. rapidity of work with great
economy of motive power.
And in order that the said invention may be more clearly understood and readily
carried into effect I will proceed aided by the accompanying drawings more fully to
describe the same.
DESCRIPTION OF THE DRAWINGS.
Figure 1 is a vertical longitudinal section and Figure 2 is an edge elevation
partly in section of a mill constructed according to the present invention.
It consists of a vertical mill stone or wheel A, which may be of any suitable
diameter and dimensions according to the purposes to which it may be applied, this
mill stone or wheel is caused to turn at its circumference preferably at a speed of
about 6 meters in the second.
Around this mill stone or wheel A and on its descending side are arranged
smaller wheels or cylinders B, C, C4, Cu turning in contrary direction to that of the
mill stone or wheel A in such manner as to form with it a series of rolling mills,
the entrance to each of which is of gradually diminishing size, the first of these

page_text: smaller wheels or cylinders B serving as a breaker is generally grooved and
separated at a distance of about from 20 to 30 millimeters from the mill stone or
wheel A, the following ones approaching nearer and nearer to the mill stone
or wheel unto the last C which is very near to it and may even touch it, according
to the degree of fineness which it is desired to obtain.
The separation of the smaller wheels or cylinders is effected by keys J which are
increased or diminished in number at will, pressure is applied separately to each of
them by means of screws D connected together in pairs by toothed wheels. The
pressure of these screws is rendered elastic by means of powerful springs E, E, which
permit the smaller wheels or cylinders to separate from the larger one to allow too
large or too hard pieces to pass, which may have become accidentally introduced
into the apparatus.
A hopper F placed at the entrance of the first rolling mill receives the matters to
be crushed or ground, it is continued by two circular bands G, G, embracing the
mill stone A and forming a passage for guiding the materials in their entire course,
cross bara H, H of the form shown secure the separation of these bands and regulate
the entrance of the materials into each successive rolling mill.
The speed of the smaller wheels or cylinders may be alike or different to that of
the mill stone or wheel A according to the requirements of the crushing or grinding,
each of them is for this purpose rotated by its own special pulley.
After the bolting or sieving of the crushed or ground materials, the pieces which
have not attained the desired degree of fineness are returned to the apparatus and
delivered into the hopper I, so as to pass through only the later rolling mills, at the
same time as the broken matter coming from the preceeding rolling mills.
The advantage of this system is in operating gradually; each rolling mill except
the first acting upon matters already prepared by the preceding ones can neither
become choked nor be submitted to violent efforts.
If the material is wanting or if it has not sufficient size to be crushed by some
of the rolling mills the corresponding smaller wheels or cylinders have little or no
work and do not consume any motive power.
A perfect crushing is also obtained by this means combined with rapidity of
work and a considerable economy of motive power.
The mill stone or wheel A. and the smaller wheels or cylinders may according to
their application be of stone, metal or of any suitable composition, their surface
may be smooth, striated fluted or grooved; they may be rotated at equal or
different speeds by means of belts or straps, gearing or any other convenient means
of transmission.
Having now particularly described and ascertained the nature of the said
invention, and in what manner the same is to be performed, I declare that what
I claim is
The breaking and crushing or grinding of all kinds of solid hard materials, by
means of a succession of rolling mills with gradually decreasing entry formed by the
combination of a mill stone or wheel on a horizontal axis and of several smaller
wheels or cylinders also on horizontal axes and arranged around the mill stone A.
on its descending side substantially as herein shown and described.
B. J. B. MILLS.
By Harris & Mills,
23, Southampton Buildings,
Agents,