Improvements in and relating to Pulverizing Mills.
Year: 1897

page_text: Date of Application, 21st May, 1897-Accepted, 9th Oct., 1897
[Communicated from abroad by THE MORRIS BALL PULVERIZER COMPANY of
Cleveland Ohio United States of America.]
Improvements in and relating to Pulverizing Mills.
I, CHARLES JUNGE, of Lincoln Chambers, 75 Chancery Lane, London, W.C.,
Consulting 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 has relation to that class of devices especially designed for pul-
vezing rock and ores which carry deposits of precious metal, and in which the
pulverizing agent consists of a series of independently acting balls or rolls adapted
to revolve in a track concentric to the axis of an actuating super-imposed driver,
the latter being so arranged as to allow the pulverizing balls to pass over material
varying in size.
Figure 1 is a central vertical section of the improved device.
Figure 2 is a plan of the tripod frame.
Figure 3, is a horizontal section through the rotatable driver, showing disposi-
tion of the spring wells, and aperture for the reception of the wabbler.
Figure 4 is a similar view through the wabbler.
1, represents a suitable cylindrical case or shell, the upper end of which
terminates in a concentric channel having the flaring flange 2, said flange being
provided with a series of ears 3, coincident with a series of lugs 4, upon the peri-
phery of the cap 5, by means of which and suitable bolts 6, said cap is secured and
retained in place. The cap is provided with a proper opening 7, through which
the material to be operated upon is fed, by any suitable means.
This flanged channel receives a circular track 8, which is provided with a remov-
able wearing face or ring 9, and in which the series of pulverizing balls 10 revolve.
The space between this track 8, and the wearing ring 9, is partially filled with
asbestos, while I drive in wooden wedges at the upper edge to obtain the desired
rigidity.
11, is a rotatable driver which is provided with a removable wearing ring 12,
which rests upon the pulverizing balls 10. This driver 11, is hollow and in its
depending portion there is formed a series of wells 13, preferably four in number
which are designed to receive the springs 15; the central portion of this driver 11
has formed in it an axial opening 14, substantially in the form of a Greek Cross,
as shown, and this is designed to receive the head or wabbler 16, which is slidingly
keyed upon the upper end of the shaft 18. 17, is a cap which covers the weight
and is retained in place thereon by any suitable bolts. This cap carries the disc
plate 19, upon which the material to be operated upon falls, and which, through
centrifrugal action, tends to distribute the material evenly to the action of the
pulverizing balls.
The lower end of the driving shaft 18 passes through a suitable split box 20
which is supported by a tripod frame 21, the arms of which latter are rigidly

page_text: secured to the inner walls of the case 1. The said box 20 may be formed integrally
with the said tripod, as shown in Figure 2.
A split clamp-nut 22 is secured upon the shaft near its lower end, the upper face
of said nut having an annular groove formed therein for the reception of anti-
friction balls 23, upon which latter rests a loose collar 24. 25, is a removable
case for enclosing the parts last described, to prevent dust from getting upon the
bearing.
26 represents the driving pulley, which may be keyed upon the shaft, though I
prefer to employ a split pulley as shown, as it is more easily removed and adjusted.
28 is an inclined partition shelf which directs the pulverized material to the
discharge 29; the center of this shelf carries a box 31, provided with a cap 32,
and between which the shaft passes, its upper end passing through the hub of the
head or wabbler 16, and receiving an adjusting clamp nut 33. 34 is a cap collar.
to exclude dust from the box 31, and the stuffing box 37.
35 represents an oil cup from which a conducting pipe 36 runs, preferably to
the cap 32, so that oil may be delivered to the shaft practically at the highest point
where lubrication is needed, and from whence, by gravity, the lubricant passes to
the extreme lower end of the shaft.
In practice, motion is imparted to the shaft through the medium of the drive
pulley, and through the shaft to the driving weight. The revolutions of the weight
or driver causes the balls, upon which it rests, to travel around the track at a speed
proportionate to that at which the shaft is driven, and the material fed to the
machine passes to the ball track where it is pulverized, not through the vertical
pressure upon the grinding balls alone, but also through the pressure produced
from their centrifugal and tangential action, when in operation.
In machines of this class, the centrifugal action tends to cause the grinding
balls to climb or creep up the wall of the grinding track to the highest attainable
point, especially when driven at a high rate of speed. Such movement of the
balls carries them above the point or bottom of the track. To obviate this objec-
tion, and to retain the balls at their lowest points where they will travel in the bottom
of the track, I employ the two adjusting nuts 22 and 23, at the lower and upper ends
of the drive shaft, respectively, so that the parts may be readily adjusted in order
to limit the centrifugal climbing of the balls. while it in nowise interferes with the
oscillation of the driver incidental to the unevenness of the material being operated
upon.
This
By securing the shaft against end displacement as described, it will be readily
seen that, upon turning down the nut 33, the wabbler is forced down upon the shaft,
thereby necessarily increasing the pressure upon the springs and the revoluble
weight or driver; hence, such increased tension must exert greater pressure upon
the grinding balls than would be exerted by the gravity of the parts.
increased tension of the springs could not be obtained were it not for the fact that
the shaft, being secured against end displacement, practically forms one of the
points of resistance to prevent the expansion of the springs, while it also prevents
the centrifugal force, the spring expansion, or both combined from lifting or
forcing the revoluble parts out of their relative positions.
Having now particularly described and ascertained the nature of the said
invention, and in what manner the same is to be performed, we declare that what
we claim is:-
-
1. In a pulverizing mill, in combination, a driving shaft, a revoluble driver or
weight vertically adjustable upon and in relation to said shaft, the lower end of
said shaft being journaled in an anti-friction bearing and secured against end
displacement, substantially as and for the purpose set forth.
2. In a pulverizing mill, the combination of a driving shaft, a revoluble driver
inclosing springs interposed between said driver and a wabbler longitudinally
adjustable upon said driving shaft, the lower end of said shaft being journaled in
anti-friction bearings and secured against end displacement, and a driving ring

page_text: revoluble with said driver and exerting a vertical, tangential and centrifugal
pressure upon grinding balls travelling in a rigid concentric track, substantially
as and for the purpose set forth.
3. In an ore pulverizer, in combination, an inclosing frame, a concaved ring
track, crushing balls within said ring track, a concave driving ring in peripheral
contact with said crushing balls, a hollow driver engaging said driving ring, a
wabbler movable longitudinally upon an actuating shaft, springs interposed
between said wabbler and said hollow driver, an adjusting nut upon the upper
end of said shaft, and a cap removably secured to the said driver carrying a
distributing disc, substantially as and for the purpose described.
4. In a
pulverizing mill of the character described, in combination, a driving
shaft, a wabbler longitudinally adjustable upon said shaft, a hollow driver engaging
said wabbler, springs interposed between said hollow driver and said wabbler, an
adjusting nut upon the upper end of said shaft, rigid bearings for the lower end
of said shaft, a loose collar upon said shaft below said rigid bearings, an adjustable
nut upon the lower end of said shaft, and anti-friction balls between said loose
collar and said nut, substantially as and for the purpose specified.
07
ear
1007
CHARLES JUNGE.