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Патент USA US2407852

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Sept. 1-7, 1946.
Filed Oct. 8, 1943
4 Sheets-Sheet 1
min/may Elana/$3158]: ‘ y
Sept. 17, 1946.
Filed Oct. 8, 1943 m
4 Sheets-Sheet 2‘
Jaw/9x7 6.’ 5194/1/10” "
By Ema/6M
Sept. 1?, 1946.
Filed Oct. 8, 1945
4 Sheets-Sheet 3
c/osaw/f JMA/A/a/I/
Sept. 17, 1946.
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' 2,407,851
Filed Oct. 8, 1945
4 Sheets-Sheet 4
Patented Sept. 17, 1946
7 2,407,851
UNITED sTArEs'eArEN'r orrlcn
Joseph 0. Shannon, Leadville, 0010.
Application October 8, 1943, Serial No. 505,524
1 Claim. (Cl. 209—-384)
The present invention relates to new and use
ful improvements in mineral classi?ers for use
principally in the art of controlled grinding in
the milling of friable ores.
It is a matter of common knowledge that in
the grinding of friable ores, such as zinc, lead,
et cetera, there is a tendency to slime a large per
centage of the ore. It is also well known that
a certain percentage of such ores, as they
are blasted in the mines, and crushed ores pre
pared ‘for treatment, is ready for recovery with
out the necessity of going through a grinding
mill. The principal object of the present inven
ing the tooth frames on the'sluiceway or trough.
Figure 8 is a top plan view, showing'the motor
drive for the tooth frames.
Referring now to the drawings in detail, it will
be seen that the embodiment of the apparatus
which has been illustrated comprises a sectional
trough or sluiceway which is designated generally
by reference character l. The trough l, which
may comprise any desired number of sections,
10 is mounted at an inclination on a suitable sup
porting structure 2. The trough 5 includes a
bottom 3 and side walls 4, said bottom 3 having
transverse slots 5 therein.
tion is to provide, in a manner as hereinafter
Depending from each section of the trough l
set forth, an apparatus which may be installed. 15 is a hopper ii. The hoppers 6 communicate with
ahead of the mill for recovering the ?ne ore
the trough l for receiving the ?ne ores therefrom
which does not need grinding, thus preventing
over-grinding and sliming thereof.
Another very important object of the inven
tion is to provide, in a mineral classi?er com
prising a substantially trough-like structure in
cluding a bottom having openings therein for
the passage of the ore to be recovered, novel
means for positively preventing clogging of said
Other objects of the invention are to provide a
mineral classi?er of the character described
which will be comparatively simple in construc
through the slots 5. Outlet pipes l9 connect the
hoppers 6 with suction pumps 20, said suction
pumps being driven by electric motors 2!. It
20 will be observed that an outlet pipe IS, a suction
pump 2i] and a motor 2! are provided for each
of the hoppers t.
The side walls 4 of the trough I extend down
wardly below the bottom 3 of said trough in a
' manner to constitute the upper portions of the _
hoppers E.
Substantially rectangular frames 8
are mounted for lateral reciprocation in
upper portions of the hoppers 6 beneath the
tion, strong, durable, highly e?icient and reliable
tom 3 of the trough i. Supporting rods 9
in operation, compact, and which may be manu 30 H] project from the ends of the frames 3
factured and installed at low cost.
All of the foregoing, and still further objects
and advantages of the invention will become ap
parent from a study of the following speci?cation,
taken in connection with the accompanying
drawings wherein like characters designate cor
responding parts throughout the several views,
and wherein:
extend slidably through the lower portions of
the walls 6;. Suitable packings H (see Fig. 7)
prevent air from being drawn into the hoppers 6
around the rods 9 and E9. Upstanding teeth I2
of substantially the shape shown to advantage
in Figure 6 of the drawings are mounted on the
frames ii and project into the slots 5 for operation
therein. In the embodiment shown, the teeth 92
Figure 1 is a View in side elevation of a mineral
comprise depending lugs or pins [3 which are
classi?er constructed in accordance with the pres 40 engaged. in openings provided therefor in the
ent invention.
frames 8.
Figure 2 is a top plan view thereof.
Brackets M are mounted on the side wall 4
Figure 3 is a cross-sectional view, taken sub
through which the rods l8 project. Bell crank
stantially on the line 3—3 of Figure 1 with the
levers l5 are journaled for horizontal swinging
electric motor and suction pump omitted.
45 movement on the brackets 54.‘ The bell crank
Figure 4 is a, plan view of an intermediate
levers l5 are pivotally connected, at one end, to
portion of the apparatus, showing one of the
the rods I0. Also mounted on this side wall 4
laterally reciprocating tooth frames.
of the trough l are electric motors l6, one for
Figure 5 is a fragmentary view in vertical 1on
section of said trough. Eccentrics I‘! are
gitudina1 section, taken substantially on the line '
mounted on the vertical shafts of the electric
5-5 of Figure 2.
. motors l6. The eccentrics I‘! actuate rods l8
Figure 6 is a detail view in side elevation of
which are pivotally connected to the other end
one of the teeth.
portions of the bell crank levers I5.
Figure 7 is a fragmentary view in vertical
It is thought that the operation of the classi?er
section, showing the method of slidably mount 55
will be readily apparent from a consideration of
the foregoing. Brie?y, the material to be treated
?ows downwardly in the trough I from the upper
end thereof. As the material passes the slots 5
the ?ne ore is recovered therefrom, said ?ne ore
being caused to pass downwardly through said
?at bottom and side walls rising from said bot
tom, said bottom having a plurality of parallel
elongated transverse slots therein, a rigid rec
tangular frame mounted forreciprocation trans
versely of the trough parallel with and beneath
slots into the hoppers 6 by gravity and suction.
With the electric motors IS in operation, the
teeth l2, which are constantly engaged in the
slots 5, are reciprocated for positively preventing
‘a the bottom,‘ said frame embodying a plurality
mineral classi?er constructed in accordance with
slidably through the side Walls of the trough for
mounting said frame beneath the bottom, hori
of spaced parallel members, each alined with one
of said slots, a plurality of spaced teeth rigid with
said parallel members of the frame and project
said slots from clogging at all times.
7 10 ing upwardly through said slots, spaced rods ?xed
to each end of the frame, ‘said rods extending
It is believed that the many advantages of a
the present invention will be readily understood,
and although a preferred embodiment of the de
zontally swinging bell-crank levers mounted on ,_
vice is as illustrated and described, it is to be 15 one of the side walls and connected atcorrespond
ing ends to the projecting ends of the adjacent
understood that changes in the details of con
rods, an electric motor -mounted on said .side
struction and in thercombination and arrange
ment of parts may be resorted to'which will fall
wall, and a rod connecting the other ends of
within the scope of the invention as claimed.
said bell-crank levers and actuated by said motor
20 for oscillating the levers and thereby reciprocat
What is claimed is:
In a mineral classi?er of the character de
ing the frame transversely of the trough.
scribed, an inclined trough for reception of the
material to be treated, said trough including a
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