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Патент USA US2120965

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Patented June 21, 1938
Hyrum D. Ghristenscn, Wilford 0. La Rue, Oak
land, and Victor E. Zackerson, Alameda,
Application March 18, 1935, Serial No. 11,660
2 Claims. (Cl. 209-41)
The invention relates‘ to machines used in
connection with amalgamating operations such
as for mixing powdered ore with mercury.
An object of the invention is to provide an
amalgamator of the character described which
is especially adapted for the concentrating and
removal of gold particles from, gold bearing ore,
and‘ which will provide not only for the bringing
of the ore into intimate contact with the mer
cury for amalgamation, but also for such a move
ment of the ore while in contact with the mer
shelf or supporting portion II which is arranged
to be cast or otherwise formed integrally with
the plate 8 and the bracket 9. In accordance
with the present invention, amalgamation of
particles of gold or other precious minerals is C1
arranged to be effected by the passage of the
ore or slurry through a con?ned space in inti
mate contact with mercury. Such a space and
passage is here provided between the opposed
spaced bottoms I2 and i3 and sides ill and Hi 1 O
of a mixing pan l1 and a plate 98 positioned
therein. As here shown, the pan is rotatably
supported by means of cooperating bearing por
tions 19 and 2! on the shelf I I while the plate
” gagement with the mercury.
i3 is supported by means of a shaft 22 rotatably
Another object of the invention is to provide
a device of the character described that will, ,carried in a bearing 23 provided at the outer
notwithstanding the con?ned movement of the end 24 of the overhanging bracket 9.
In accordance with the present invention, a
ore or slurry into intimate contact with the mer—
cury, as aforesaid, provide for a continuous and deposit of mercury is ?rst placed within the
pan I1 so as to completely ?ll the space 255
20 uninterrupted ?ow of material through the de
vice and positively prevent any stoppage of the de?ned between the bottoms of the plate and
various passages or packing of the ore in a way pan, and to extend partially up into the annu~
interfering with the ef?cient operation of the lar space 21 de?ned between the pan and plate
side walls. Then slurry ‘is introduced into the
A further object of the invention is to provide space 26 so that the mineral particles will be
an amalgamator of the above character in which caused to ?oat through the mercury in intimate
a positive automatic feeding of material through contact therewith. The introduction of the slur
ry into this space is here effected by forming
the device will be effected without the use'of ex
teriorly applied power, and wherein exterior the shaft 22 of tubular construction so as to de
fine an inlet conduit 28 which extends from an
30 power is applied substantially entirely for the
purpose of obtaining an intimate mixture of the enlarged intake portion 29 at the upper end of
materials whereby the device will be more or less the shaft through the bottom It of the plate so
as to open directly to the space 28 thereat.
positive in operation with but a minimum ex
Since, as here shown, the intake 29 is disposed
penditure of power.
well above the side walls IA of the pan, it will be
The invention possesses other objects and
features of advantage, some of which, with the understood that a natural gravitational ?ow of
slurry will be effected through the conduit 28
foregoing, will be set forth in the following de
scription of the preferred form of the invention and radially through the space 26, and thence up
through the mercury by way of the annular
which is illustrated in the drawing accompany
ing and forming part of the speci?cation. It is passage 2'! and over the sides of the pan. A
to be understood, however, that variations in the drain member 3| may be mounted around the
sides of the pan for gathering and discharging
showing made by the said drawing and descrip
the pan over?ow.v If desired the upper edge 32
tion may be adopted within the scope of the in
ofthe pan walls [4 may .be'beveled outwardly and
vention as set forth in the claims.
provided with rif?es v33 as here shown so as to
Referring to said drawing:
Figure 1 is a vertical sectional view of an agitate the material on flow thereover.
The space 26 is preferably, as here shown, rel
amalgamator constructed in accordance with
atively wide and very shallow, in practice not ex
my invention.
ceeding approximately one eighth of an inch in
Figure 2 is a plan sectional view of the amal
depth for smaller sized devices, and to insure the
gamator shown in Figure 1 and is taken substan
retention of a quantity of mercury to within
tially on the plane of the line 2-2 of Figure 1.
The amalgamator shown in the accompanying the space, notwithstanding the outward flow
drawing is comprised of a single unitary support therethrough of the slurry, we prefer to amalga
mate at least one, or in some instances both, of
1 which includes a bed plate 8, a‘ vertical over
the opposite surfaces 34 and 36 of the pan and
cury that the full exterior surface of all of the
ore particles will be passed into operative en
by (I:
plate bottoms l2 and I3. It will thus be un
derstood that on the passage of the slurry
through this relatively con?ned space, in which
a certain amount of mercury is maintained, a
very intimate association is effected between the
mineral particles and the mercury, and that this
passage of slurry is substantially entirely effected
by the natural gravitation of the material
through the machine.
This radial passage of the slurry through the
space 26 is increased somewhat upon rotation
of the pan I1. Also, an additional and impor
tant function of such rotation is to cause the
mineral particles to be de?ected circumferen
15 tially from a straight radial passage and thereby
caused to roll and orient themselves for com
plete contact thereof with the mercury. Fur
thermore, the rotation of the pan stimulates and
insures the over?ow of sand and other particles
from the pan. Normally but a relatively slow
rotation of the pan is sufficient to provide a
proper flow of material through the machine and
yet afford a sufficiently long duration of contact
between the slurry and the mercury. The cen
25 trifugal force imparted to the slurry by the pan
may be offset somewhat by rotating the plate
in an opposite direction, and this also has the
added effect of increasing the circumferential
agitation of the mineral particles and causing a
greater turning thereof in and mixing with the
In no event, however, is the centrif
ugal force set up by the rotating pan and plate
to be sufficient to cause an over?ow of the mer
cury from the pan. Since the rotation of the
pan and plate are, as above indicated, effected
at a relatively slow speed and not for the ac
complishment of any substantial work, it will
be understood that the wear on the moving parts
will be very slight, and that the power required
40 for rotating the members will be but a mini
venting or limiting the outward movement of
the plate from the pan.
Means are also provided for preventing the
material from packing in the pan l1 directly
under the inlet conduit 28 which, in the present
embodiment, comprises a screw 52 which is ?xed
to the bottom l3 of the pan and extends up
wardly into operative relation with the open end
of the conduit. Thus, on rotation of the pan,
the material is drawn through the grooves of
the screw and into the amalgamating space 25.
As will be understood, after the machine has
been in operation for some time it is desirable
that the pan ll be removed so that the contents
thereof may be carefully treated for the removal 15
of gold or other amalgamated products. To ef
fect the removal of the pan I'l, it is first neces
sary to remove the plate and shaft 22 so as to
make room for the removal of the pan. This
has been arranged for, in the present embodi
ment, by securing the plate l8 and shaft 22 to
gether as a unit and providing for their ready
removal by forming the bearing 23 with a de~
tachable outer half section 53. Thus, to effect
a removal of the pan I‘! it is only necessary to 25
?rst remove the bearing section 53 and the shaft
and plate assembly and then loosen the set screw
43 to permit the raising of the pan off the shelf
H and the upper end 31 of the shaft 38.
We claim:
1. An amalgamator of the character described
comprising, a pair of members providing opposed
spaced surfaces de?ning a relatively wide shal
low space therebetween arranged to be submerged
in mercury, one of said members being mounted
for rotation along an axis intersecting said space,
slurry inlet means opening to said space adja
cent said axis‘and providing for a ?ow of slurry
radially through said space with respect to said
axis, means of rotating said last mentioned mem 40
ber to increase said radial flow and to impart to
As here shown the pan is mounted for rota
said slurry an annular motion and means for
rotating said other member in an opposite direc
38, carried by the shelf II and bed plate 8 and tion so as to partially balance the radial flow
45 which is driven through a pair of bevel gears 39 ‘ caused by rotation of the ?rst member and to 45
and 40, and a horizontal shaft 40, by a motor. increase the annular motion of the slurry.
2. An amalgamator of the character described
42 mounted on the bed plate at the outside of
comprising, a pair of members providing opposed
the bracket 9. A set screw 43 carried in the
vertically spaced surfaces de?ning a relatively
base of the pan serves in the present case to de
wide shallow horizontal space therebetween, the
50 tachably secure the pan to the shaft 38. R0
lower surface having a rim to contain mercury,
tation of the plate, on the other hand, is ar
ranged to be effected in an opposite direction one of said members being mounted for rota
tion about an axis intersecting said space, slurry
through means of pulley wheels 44 and 46 mount
ed on the shafts 22 and 4| respectively and inlet means opening to said space adjacent said
axis and providing for a ?ow of slurry through 55
55 which are connected by a cable 41, here shown
supported in operative relation to the pulley said space, means for rotating said rotary mem
ber to cause the ?ow of slurry through said space,
wheels by means of sheaves 48 mounted on the
the upper of said surfaces being permanently
upper side of the bracket 9.
tion on the upper end 31 of a vertical drive shaft
Also, in the present embodiment, the pulley
wheel 44 is provided with a set screw 49 for ad
justably positioning the wheel on the shaft 22
and is arranged to bear on the outer side of the
bracket end bearing 23 so as to control the rela
tive positioning of the plate l8 in the pan, and
a collar 5| is preferably mounted on the shaft
22 at the under side of the bearing 23 for pre
amalgamated separate from any amalgamation
by said mercury to present an upper amalgamat 60
ed surface above said mercury to thereby cause
intimate contact of all portions of the surry with
mercury in said space.
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