IMPROVEMENTS IN MACHINERY FOR THE DIS- INTIGRATION OF QUARTZ AND OTHER SUBSTANCES
Year: 1876

page_text: LETTERS PATENT to Herbert John Haddan, of the Firm of Herbert and
Company, Patent Agents, of 67, Strand, in the City of Westminster, Civil
Engineer, for the Invention of "IMPROVEMENTS IN MACHINERY FOR THE DIS-
INTIGRATION OF QUARTZ AND OTHER SUBSTANCES." A communication from
abroad by David Dickinson Mallory, of Mystic Bridge, State of Connecticut,
United States of America.
Sealed the 14th October 1876, and dated the 25th August 1876.
COMPLETE SPECIFICATION filed by the said Herbert John Haddan at the
Office of the Commissioners of Patents on the 25th August 1876
HERBERT JOHN HADDAN, of the Firm of Herbert and Company, Patent Agents,
of 67, Strand, in the City of Westminster, Civil Engineer.
"IMPROVEMENTS IN
MACHINERY FOR DISINTIGRATION OF QUARTZ AND OTHER SUBSTANCES" A
communication from abroad by David Dickinson Mallory, of Mystic Bridge, State
of Connecticut, United States of America
-
I provide wheels formed with floats or beaters of chilled iron or other highly
resilient material made to revolve in a case or chamber, and arrange them two or
more together, so that the material from one may strike the material from another,
and the motion being in opposite or nearly opposite directions may induce a finer
and very destructive impact of the refractory particles I cause a current of air
of more or less force to bear the comminate material upward; it moves for a short
distance through a small passage at a high velocity, then is so presented to a larger
passage that the current of air continues to support the finest particles and bears
them further upward while it fails to support the denser particles, which are by
their momentum thrown out of the current and allowed to fall. The coarse falling
particles are led back into the hopper, and are again subjected to the disintigration
influence.
'
The Invention is capable of being carried out in many forms The accompanying
diagrams form part of this Specification, and are central vertical sections through the
wheels and adjacent casings.
Fig 1 is a section of the construction with two wheels or beaters revolving in
opposite directions, or may be made to revolve in same direction Fig 2 is a section
[Price 6d.

page_text: of the construction with three wheels, which may revolve in the same or opposite
directions. Fig. 3 is a section of the construction with four wheels, which may
revolve in the same or opposite directions. Similiar letters of reference indicate
like parts in all the Figures.
Referring to Fig. 1, D is the arms of the wheel, c the beaters. In the side of the
casing are hoppers A, which receive the material to be pulverized, the same having
been broken to the size of a walnut by Blake's crusher or analagous powerful
machinery (not represented), and introduced into my casing through the hopper A.
The material falls down within the casing and is struck by the projecting ends of
the beaters c, it is thereby successively knocked against the sides or internal plane
faces of the casing, and the severe blows which it receives from the beaters and from
the inner walls of the casing do much to reduce it when it arrives at the point m
The beaters throw a stream of particles of the material in one direction as indicated,
by the arrow, while the beater of the opposite wheel throws a stream of particles
in the opposite direction, as indicated by another arrow. It is a law of mechanics
that if two masses move in opposite directions with a velocity of 50 miles per hour,
the violence of their impact is the same as if one struck against a solid wall with
the velocity twice as great. It is another and less obvious law with reference to
the law of impact, but one which has been satisfactorily established, that the
destructive effect with twice the velocity is four times as great when the disintigra-
tion is proportionate to the square of the velocity rather than the velocity, directly
My Invention involves the impact of the particles against hard dead walls and
against other particles moving in the opposite direction or nearly opposite direction
at the point m, this I esteem of special advantage, because thus conditioned the blow
of each particle not only tends to shatter itself, but also to usefully 'shatter the
material against which it strikes, instead of as usual destructively abrading 01
cutting away the machine.
I prefer Fig. 2 to Fig. 1, because here are two points where the material comes
into impact thus violently at m, and prefer Fig. 3 to any of the others, as in this
are four places of direct impact, and that while the extra power necessary to drive
No 3 would only be double that necessary to drive No. 1, the production should and
would be fourfold. This machine tends to draw in air at its centre (as air is taken
to the blower in common use), and discharge it at its periphery The force with
which the air is so discharged may be modified by closing more or less the openings
or its induction, and by closing more or less the outward passage. A pipe or pipes E
of considerable size is provided to discharge the disintigrated material, a smaller
aperture e allows it to pass up with such velocity as it may from the wheels in various
figures of fineness. In the working of the machine the air is drawn up with high
velocity through the passage e, and then expands into the larger space and so loses
its velocity, that the coarse particles of solid matter fail to remain suspended and fall
into the bottom and are conducted to the hopper or mill to be reground, and the air
bears away the fine particles to the settling room or other suitable place for retaining
them, not represented. The machine may be worked in an upright, horizontal, or
variously inclined positions. The interior may be made cylindrical, but I propose
generally to avoid this latter, and use the square form as represented, and by other
means to encourage the accumulations of considerable quantities of the pulverized
matter in the corners and at other points, so that the particles are driven off from the
beaters at other points than at the point m, they will strike not the interior of the
casing but against the previous accumulated particles which form the inner casing.
I claim-
1st. The Invention herein described in all its methods, processes, parts, combina-
tions and sub-combinations, as applied to the disintigration and amalgamation of
quartz and all other materials.
2ndly. I clain two or more wheels revolving in a casing or chamber, in such
direction as that the particles of material to be ground or pulverized shall be thrown
in contact with each other.

page_text: 3rdly. So conditioning the treatment that the particles will accumulate within
the casings and form an internal layer or strata to receive the impact of the other
particles thrown outward from the wheels.
the
4thly. In combination with the mill the pipes or vessel E having a partition and
passage e.
In witness whereof, I, the said Herbert John Haddan, have hereunto set my
hand and seal, this Twenty-fourth day of August, in the year of our Lord
One thousand eight hundred and seventy-six.
H. J. HADDAN. (L.S.)