Improvements in Rock Crushers.
Year: 1897

page_text: Date of Application, 14th June, 1897-Accepted, 16th Oct., 1897
Improvements in Rock Crushers.
We, BAGSTER ROADS SEABROOK, of Gorge Road, in the City of Victoria, in the
County of Vancouver, and Province of British Columbia, Canada, Manufacturer,
and JOHN REITTER BROWN, of Harrison Hot Springs, in the County of New
Westminster, and said Province of British Columbia, Mine Operator, do hereby
declare the nature of our invention for Improvements in Rock Crushers, 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 our invention is to devise a light, strong and efficient rock crusher
which will reduce the rock both by shearing and crushing, and with but a com-
paratively small consumption of power. With this object in view, our invention
consists of an upper toothed oscillator and one or more lower toothed oscillators
operated from a single lever in proximity to suitable toothed beds set on a curve
struck from a different centre to that of the oscillators, the centres on which the
oscillators swing being at or below the centre of the curve on which the oscillator
teeth are set. Our invention further consists of such details of construction as
are hereinafter more particularly described and then definitely claimed.
Figure 1, is a sectional elevation of our machine with one upper and one
lower oscillator.
Figure 2, is a side elevation of the same partially in section.
Figure 3, is a front elevation of the body of the machine showing the mode of
adjusting the oscillators.
Figure 4, is a sectional elevation of our machine with one upper and two lower
Oscillators.
Figure 5, is a perspective view partially broken away of a modification of our
machine.
In the drawings, like letters of reference indicate corresponding parts in the
different figures.
A, is the frame of the machine, which is shaped as shown, and preferably
formed in sections bolted together, as seen in Fig. 2. The outside of this frame
has flanges a, formed thereon by means of which it may be secured to a suitable
timber framing. It will be noticed that in Fig. 4, the frame is so constructed
that the base of the frame only requires to be secured to a timber framing, in this
respect being simpler than the frame shown in Fig. 1. This frame is suitably
shaped to form the beds B, and C, for the upper and lower oscillators respectively
These beds are provided with toothed die-plates D), and E, which in practice will
be made detachable from their beds so that they may be renewed when worn.
It will be noticed that the teeth of these die-plates point upwardly so as to catch
and hold any rock fed into the machine.
F, is the upper oscillator journalled on the shaft G, carried in bearings H,
vertically adjustable on the frame of the machine, as hereinafter described. The
CD 977

page_text: ends of the upper oscillator are preferably provided with two bearings for the
shaft G, one below the other, as shown in Figs. 1 and 2, so that the oscillator
may be set to produce a greater or lesser amount of crushing action, as hereinafter
described. The oscillator is provided with toothed die-plates as shown, with the
teeth set substantially in opposite direction to the teeth upon the die-plates of
the bed.
I, is the lower oscillator fast upon the shaft J, supported in the bearings K,
vertically adjustable on the frame of the machine, as hereinafter described. This
lower oscillator is provided with toothed die-plates corresponding with the toothed
die-plates of the upper oscillator. As the lower oscillator works upon smaller
material than the upper oscillator, it is set closer to its bed and the teeth upon the
die-plates of the bed and oscillator are finer than upon the upper bed and
oscillator.
It will be noticed that the oscillators are provided with wedge-shaped tops
which serve to direct the rock between the die-plates at either side. The die-
plates of the upper bed B, end at a point substantially above the space between the
lower die-plates so that the crushed rock drops from them between the lower
die-plates.
L, are arms extending upwardly from the upper oscillator, and M, are arms
extending downwardly from the lower oscillator shaft and rigidly connected
thereto. N. are large vertical levers journalled upon the ends of the shaft G,
and connected by a shaft O, upon which are journalled the upper ends of the
arms L.
The lower ends of the levers N, are connected by the shaft l', suitably
arranged to be rocked by pitmen from a suitable source of power, or by any other
desirable means. The arms M, are provided with wrist pins extending into
slots Q, formed in the levers N.
From the construction described, it follows that the rocking of the levers N,
will rock the oscillator F, and I, the upper oscillator being swung to one side at
the same time the lower oscillator is swung to the opposite side so that while the
upper oscillator is crushing rock on one side, the space beside the lower oscillator
is receiving the crushed ore ready to operate upon it when the levers N, make their
return swing.
R, is the discharge opening from the lower oscillator. S, are openings through
which water may be admitted for wet crushing. T, is a hopper connected to the
upper portion of the frame to receive the rock and feed it to the crusher. The
bearings H, are held to the end of the frame, as shown in Fig. 3, by the bolts U,
which pass through slots in the bearings so that the bearings may be clamped at
any desired height. A lug b is formed on the upper edge of the frame and a
similar lug c on each bearing. An adjusting screw d passes through these lugs
and serves to adjust the bearing to any desired point, after which it may be
clamped by means of the bolts U. The lower bearing plate is constructed in
substantially the same manner as shown. By the side of each plate, we form a
scale so that each end of each oscillator may be adjusted to correspond with the
other end and the relative positions of the oscillators to their beds may be seen at
a glance. To ensure steadiness, a portion e, of each bearing is fitted into a slot
in the ends of the frame. By thus making the oscillators vertically adjustable,
the machine may be set to operate upon rock of any desired size, or set to turn
out the crushed product of any degrees of fineness.
In Fig. 4, we show two lower oscillators, a wedge-shaped screen V, being located
below the upper oscillator and its bed, to discharge the crushed rock upon the
lower oscillators. The screen V, permits the fine parts of the crushed rock from
the upper oscillator to fall through into the opening VI, from whence it may be
discharged by any suitable chute.
The arms M, of the lower oscillators are connected by the cross-bars A¹, each
of which has a wrist pin connected thereta to engage with the slot Q, upon the
corresponding lever N, thus both lower oscillators are moved simultaneously by
the lever N, as is the single oscillator shown in Fig. 1. This form is preferable

page_text: in many respects as the large upper oscillator is apt to crush more rock than can
be quickly and economically dealt with by a single small lower oscillator.
To further relieve the work upon the lower oscillators, we form the top of each
of a curved screen B', which permits the finer crushed material to pass into the
interior of each oscillator, and thence through the openings C¹, to the discharge.
When the oscillators are set as in Fig. 1, there are three reducing actions upon
the rock fed to the crusher during each half of the swing. The rock, when caught
between the teeth at the upper part of the bed and the oscillator, is subject to a
shearing action, which rives them in a vertical plane. They are carried down
and caught between the teeth at the lower part of the oscillator and the teeth
towards the upper part of the oscillator, and are subjected to a cross shearing
strain. As they are carried still further towards the lower part of the toothed
die-plates of the bed, the rock is subjected to a crushing action, as when the
oscillator is swung the teeth at its upper portion approach much more closely to
the teeth at the lower portion of the bed than to the teeth at the upper portion.
By the time this action has taken place, the oscillator swings in the opposite
direction, which changes the position of the rock in the crusher ready for the
next action. When any one set of the oscillators is crushing, the teeth swing
well past the lower end of the die-plate of the bed and carry the crushed material
away rapidly to be acted upon by the lower oscillators, which reduce the material
to a finer condition. If the oscillator be swung on a point below the centre of
the curve from which its teeth are set, as in Fig. 4, or if the oscillator be swung
on the lower bearing shown in Fig. 1, the crushing action will be much greater
in proportion to the shearing action, as the upper portion of the oscillator swings
much more rapidly towards the bed plate. This crushing action requires the use
of greater power and greater strength of parts, but produces less wear upon the
die-plates as the rock is crushed upon itself.
Figure 5, is a perspective view partially broken away, of a modification of our
machine. The oscillators, as will be seen, have upwardly extending arms pivotally
connected to a swing bar which may be operated by hand. The chief point to
which we desire to call attention is the method of holding the lower oscillator,
which, as will be noticed, is toothed but for a small portion of its face, the bed
also being provided with teeth at its extreme upper surface only. The lower
surfaces of the bed and oscillator are in contact as shown, the oscillator being
journalled in bearing pieces D¹, vertically movable in guides formed in the frame
of the machine.
E¹, is a lever pivoted at one end to the frame of the machine and centrally
slotted to receive the pin F¹, projecting from the bearing piece 11. To the other
end of the lever E', is connected a spring G¹, the other end of which is connected
to the frame of the machine so as to normally pull the bearing piece D', downward
and thus hold the oscillator in contact with its bed. These parts are duplicated
at the other side of the machine. This modification of the oscillator is adapted
for finely pulverizing the rock.
From the above description it will be seen that we have produced a very simple,
efficient and convenient rock crusher which will take in quarry rock of any
required size and reduce it to almost any necessary degree of fineness as the
machine may be adjusted. From the mode of construction and operation of the
oscillators, there is no great or undue shock on the machine while in motion,
making great saving in wear of dies and resulting in great economy of power.
The absence of undue shock also results in economy of weight in proportion to
the work accomplished. As the machine is made in sections, it is very convenient
for transportation in rocky and mountainous countries. The machine is also
entirely automatic, requiring no attention, as it can be connected directly under
a rock bin and cannot clog by over-feeding. We find that this machine crushes
the rock in very evenly shaped cubical pieces rather than in prismatic or other oblong
shaped. It will be seen that the machine can also be made to crush with one side
only instead of with two sides, as here described and shown.

page_text: Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, we declare that what
we claim is :-
1. In a rock crusher, a curved bed provided with upwardly-directed teeth, in
combination with an oscillator suitably journalled and provided with downwardly
directed teeth; an arm or arms connected to the oscillator, and one or more levers
each suitably journalled and connected at one end to an oscillator arm or arms,
substantially as and for the purpose specified.
2. In a rock crusher, a curved bed, in combination with an oscillator suitably
journalled in a shaft carried by the frame of the machine; an arm or arms
connected to the oscillator and one or more levers, each suitably journalled on the
oscillator shaft and pivotally connected at one end to an oscillator arm, substantially
as and for the purpose specified.
3. In a rock crusher, an upper curved bed and a lower curved bed communicating
therewith, in combination with an upper oscillator suitably journalled on a shaft
carried in bearings on the frame of the machine, a lower oscillator fast on a shaft suit-
ably journalled on the frame of the machine; an arm or arms connected to the upper
oscillator and extending upwardly therefrom; an arm or arms rigidly connected
to the shaft of the lower oscillator, and one or more levers, each suitably journalled
on the upper oscillator shaft, pivotally connected at one end to an upper oscillator
arm and adapted to rock the lower oscillator arm or arms, substantially as and
for the purpose specified.
4. In a rock crusher, an upper curved bed and two lower curved beds com-
municating therewith; in combination with an upper oscillator suitably journalled.
on a shaft carried in bearings on the frame of the machine; two lower oscillators
fast on shafts suitably journalled on the frame of the machine; an arm, or arms
rigidly connected to the upper oscillator and extending upwardly therefrom;
arms rigidly connected to one or both of the lower oscillator shafts; one or more
levers each suitably journalled on the upper oscillator shaft and pivotally connected
at one end to an upper oscillator arm; a link connecting each pair of the arms of
the lower oscillator shafts, and a pin upon the link adapted to engage in a slot
in one of the said levers, substantially as and for the purpose specified.
5. In a rock crusher, an upper curved bed and a lower curved bed communi-
cating therewith, in combination with an upper oscillator suitably journalled on a
shaft carried in bearings on the frame of the machine; a lower oscillator fast on
a shaft suitably journalled in bearings vertically adjustable on the frame of the
machine; an arm or arms connected to the upper oscillator and extending up-
wardly therefrom; an arm or arms rigidly connected to the shaft of the lower
oscillator, and one or more levers, each suitably journalled on the upper oscillator
shaft, pivotally connected at one end to an upper oscillator arm, and adapted to
rock the lower oscillator arm or arms, substantially as and for the purpose specified.
6. In a rock crusher, an upper curved bed and a lower curved bed communi-
cating therewith, in combination with a suitably journalled upper oscillator; a
suitably journalled lower hollow oscillator; means for rocking the said oscillators;
and a screen covering the said oscillator; discharge openings being formed in
the lower side of the said lower oscillator and in the bottom of the machine below
the said oscillator, substantially as and for the purpose specified.
7. In a rock crusher, an upper curved bed and two lower curved beds com-
municating therewith; in combination with a suitably journalled upper oscillator;
two suitably journalled lower oscillators; means for rocking the said oscillators;
a wedge-shaped screen located below the upper oscillator and above a suitable
chamber, and screens covering the top of one or both lower oscillators, discharge
openings being formed in one or both lower oscillators and in the bottom of the
machine below each of the said oscillators, substantially as and for the purpose
specified.
8. In a rock crusher, a curved bed provided with toothed die-plates, in com-
bination with a suitably-journalled oscillator carrying cufved toothed die-plates

page_text: eccentric to the curves of the bed, the oscillators being journalled below the centre
of the curve of its die-plates, substantially as and for the purpose specified.
.9 In a rock crusher, a curved bed provided with toothed die-plates, in com-
bination with a suitably-journalled oscillator carrying curved toothed die-plates
eccentric to the curves of the bed, the oscillator being provided with bearings both
at and below the centre of the curve of its plates, substantially as and for the
purpose specified.
10. A rock crusher, substantially as shown in Fig. 5 of the drawings, in which
the lower oscillator is held in contact with the lower portion of its bed by spring
pressure, substantially as described.
BOULT & WADE,
Agents for the Applicants.