Improvements in Stone Crushers and Pulverizers.
Year: 1891

page_text: COMPLETE SPECIFICATION.
Improvements in Stone Crushers and Pulverizers.
I, RYERSON DUDLEY GATES, of No. 50 South Clinton Street, in the City of
Chicago, County of Cook, and State of Illinois one of the United States of
America, Manufacturer, do hereby declare the nature of my invention and in what
manner the same is to be performed to be particularly described and ascertained
in and by the following statement :-
The object of my invention is to make a stone crusher and pulverizer, in which
the crushing portion of the conical die surrounding the stone-breaking head is
stationary, while the pulverizing portion is movable, so that, as the stone is broken
or crushed and falls down, it is not allowed to escape until finely pulverized. In
a prior Patent No. 7987 dated May 20th, 1884, for a pulverizing machine, the
entire conical die was allowed to move or yield, and I found that in that machine
that part of the conical die where the stone was broken or crushed, would move
away from the conical crushing-head that was carried by the gyrating shaft, which
objection overcome by dividing the conical die, making the upper portion of it
stationary, while the lower portion only is allowed to yield so that I am enabled to
break stone by impinging it against the movable part of the conical die. In this
construction I am enabled to break stone and pulverize it finely before it is
delivered from the machine.
In the accompanying drawing,
Figure 1 represents a vertical sectional view of the entire machine.
Figure 2, a transverse sectional view of a portion of the machine, taken on
line 2-2 Figure 1.
Figure 3 an enlarged vertical sectional view of part of the lower portion of the
machine.
Figure 4, is a cross section on line 4-4 of Fig. 3, and
Figure 5 a side view of a portion of the case I, showing one of the cap-plates, V,
detached from the machine.
A represents the gyrating shaft, with an eccentric bearing box, B, at its lower
end, which eccentric bearing box is rotated by means of the cog-wheels, C and D
having power communicated to them by the shaft E. The eccentric bearing
box B is held in the base of the machine, F, which is supported upon the timbers, G.
The gyrating shaft A carries the crushing head or cone, H. There is a circular
outer case, I, which extends entirely around the upper portion of the machine, and
rests upon the cylindrical lower portion, J, of the machine, and is secured thereto
by bolts, a. There are several holes, L, in the outer casing I of the machine, in
which are placed the coil-springs, M, which bear against the conical pulverizing
die N and allow it to yield as the crushing cone or head H is gyrated; the
cylindrical pulverizing die being smaller than the interior of the outer case I in
which it is placed.
O is a stationary conical die, firmly secured in the casing I immediately above
the pulverizing die N, so that the stone, when admitted into the top of the machine,
is broken and crushed against the stationary die O by the upper portion of the
cone or breaking-head H, and the pieces immediately fall down between the crushing-
head or cone H and the movable die N, where they are pulverized very finely
before being discharged into the machine below.
P is the top piece of the machine, which is securely bolted to the case I by the
bolts b.
Qis a thin piece of wood, or other material, between the top P and the
cylindrical stationary die O. R are parts of the casting P, and carry the bearing
box S for the top bearing of the gyrating shaft A. This bearing box is constructed

page_text: in any of the well-known ways for constructing the gyrating stone breakers, with
the gyrating shaft gyrated at its lower end.
I also show in my drawing the construction of the diaphragm for delivering the
pulverized stone at one side of the machine, and the dust protectors to prevent the
dust of pulverized stone from reaching the bearing and gearing at the bottom of
the machine, and also the oil ducts for oiling the lower bearing, and the step-blocks
and adjustable set-screw device for adjusting the gyrating shaft; all of which may
be constructed in any of the well-known ways of constructing the gyrating type of
stone-breaking machines.
The springs M have a following plate T, with screw-bolts U, by which the
pressure of the springs against the pulverizing die N is regulated.
V are cap-plates, covering the holes L in the case I, and are firmly secured to
the case by bolts, c.
These cap-plates also have a screw-threaded hole to receive the bolts U, as
clearly shown in Figure 1.
I find by this construction of the machine, that I can crush the stone and
pulverize it. The crushing of the stone in the upper part of the machine where
the cylindrical die is stationary, continues while the pulverizing die moves with the
crushing cone or head, which is securely fastened to the gyrating shaft.
In my machine patented June 16, 1885, the whole die was made movable,
which interfered with the crushing of the stone, while in this machine, which is
an improvement on that Patent, the crushing is continued, while the pulverizing is
accomplished by means of making a separate pulverizing die placed below the
crushing die. I am aware that machines of this type, constructed with the conical
die wholly stationary, are old, but in such machines, as the crushing-head or conc
is gyrated, the opening at the bottom of the die must necessarily be as large as
the throw of the breaking-head, which leaves quite a wide space for the crushed
stone to escape, and it is impossible to finely pulverize stone in such machines. I
am aware that in my Patent of June 16, 1885, the entire die was made movable,'
and was secured by springs in the outer casing of the machine substantially the
same as I secure the pulverizing die in this application; but in that Patent the
crushing of the stone was interfered with, on account of the whole die moving
with the gyrating crushing-head or cone. In this machine, I am enabled to carry
on the crushing of the stone and pulverize it, thereby accomplishing the desirable
result, which, so far as I know, has not been accomplished before.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
:-
In a stone crusher and pulverizer the movable pulverizing die N, stationary
crushing die O, and breaking head or cone H, substantially as and for the purposes
specified.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.