Improvements in Grinding or Pulverizing Apparatus.
Year: 1895

page_text: PROVISIONAL SPECIFICATION.
Improvements in Grinding or Pulverizing Apparatus.
I, CHARLES MOREL, of Domène near Grenoble in the Republic of France,
Engineer, do hereby declare the nature of this invention to be as follows:-
This invention relates to that class of grinding or pulverizing machines which
utilize centrifugal action.
According to this invention the driving shaft which is mounted in suitable bearings
passes into a grinding cylinder and is there attached to a frame consisting of a
series of curved radial arms which form species of channels with openings to a
cominon hub or centre. Travelling loosely in said channels but separated by the
pairs of arms are balls which when in motion have a rolling contact on the internal
grinding face of the cylinder.
The material to be ground is fed through a suitable hopper and feed pipe to the
hollow centre of the arm hub and and a lower front screen permits the escape
through a discharge opening of such of the material as is sufficiently fine to pass
through same.
The balls and contact face of the cylinder may be made of steel or other hard
material which will not be injurious to the substance to be ground and the carrier
arms may be provided with similar hard material wearing blocks to take any blows
that may be given thereto by the rolling balls.
With this construction it will be noted that the substance to be ground as well
as the rolling balls are thrown out to the grinding face of the cylinder by
centrifugal force and that such cylinder may be set in a vertical plane.
The apparatus may be employed for either dry or wet grinding.
Dated the 26th day of March 1895.
PHILIP M. JUSTICE,
Associate Agent,
For the Applicant.
I, CHARLES MOREL of Domène near Grenoble in the Republic of France,
Engineer, 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:-
.
This invention relates to that class of grinding or pulverizing apparatus which
utilize centrifugal action.
The apparatus is adapted for the purpose of grinding and pulverizing dry or wet
substances, such as cements, lime, quartz, phosphates, gold and silver ores, and
the like.
The accompanying drawing represents one form of apparatus adapted for the
above purpose, Figure 1 being a longitudinal vertical section, and Figure 2 a
front view, one half being in elevation, and one half in section.
The crushing is done by a series of balls A of steel or other suitable metal acting
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page_text: by centrifugal force in a circular race or track B likewise of steel or other suitable
metal. The balls are set in motion by a carrier C having as many cavities as there
are balls. In each arm of this carrier is fixed a removable steel block E, against
which the balls bear during rotation and which allow for the wear without danger
of any injury to the carrier. If desired similar blocks E' E' may be used which
bear against the sides of the balls to steady and support same. The carrier is
given a rotary motion from the central shaft F which is mounted in bearings G G'
carried by suitable brackets.
The work is performed in the following manner :-
The material to be crushed is introduced through the opening H, the spout of
which is extended to the centre of the carrier. This latter has holes through its
arms and in its rotation throws the material all around the race or track B, and
subjects it to the crushing force of the balls passing round said race or track. The
crushing force of the balls due to the speed produces a certain quantity of fine dust
which is thrown on the grating I, which allows the finest to pass and retains the
larger portions, such larger portions being brought back beneath the action of
the balls by the arms of the carrier acting on the accumulation at the base of the
grating. The particles fine enough to pass through the screen are delivered through
the outlet J. A feature of the apparatus is its arrangement in a vertical position
with the balls rolling freely between the arms of the carrier, which carrier receives
the material to be crushed through its centre in order to distribute it upon the
circumference of the race or track B.
The body of the crusher consists of a cylinder K having a side or door L which
carries the inlet and delivery spouts and screen.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is :-
1. A. crusher arranged in a vertical position provided with a circular race or
track, in the centre of which is a rotatable carrier having cavities for holding the
balls and arranged to allow of the introduction of the material to be ground into
the centre of same from which it may pass to the race or track substantially as
described.
2. The arrangement in a crusher substantially as described of a screen adapted
to regulate the fineness of the material delivered substantially as set forth.
3. The improved construction and arrangement of crusher substantially as
described and illustrated in the drawings.
Dated the 20th day of December 1895.
PHILIP M. JUSTICE,
London, Chartered Patent Agent,
For the Applicant.