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Патент USA US2124205

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July 19, 1938.
H. w_ Mom.
. 2,124,205
Filed Feb. 16, 1937
5 Sheets-Sheet‘ l
'A/wem M/Vw/e
I ‘
July 19, 1938.
H. w. MOIR
Filed Feb. 16, 1937
3 Sheets-Sheet 24
. 7/2
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Patented July v19, 1938
Harry W. Moir, Seattle, Wash., assignor to. Robert
Gillespie, Seattle, Wash.
Application February 16, 1937, Serial No. 125,983
12 Claims. (Cl. 209—-j54)
This invention‘ relates to improvements in
amalgamators for the recovery of free gold 'from
ore or'sand, and it has for its principal objects
to provide a mechanical, rotary amalgamator for
I the above purpose, of relatively inexpensive con
free mercury without fouling has always re
struction; of a kind that is readily adapted to
whereby those disadvantages are
present-day milling or sluicing operations; which
requires little power for its operation, and is ca
pable‘ of recovering a much greater percentage
0 :of gold than has been» possible by the use of
amalgamators of the various kinds heretofore
‘ commonly used.
More speci?cally stated, the present invention
resides in the provision of a rotary amalgamator
lincluding a housing designed for the passage
making the gold particles amenable’to amalga
Explanatory to the advantages of the present
.‘device, it may be here stated that the recovery
3 O of metallic gold by amalgamation has been prac
tised for many years.‘ The af?nity of quicksilver
for gold and silver in their‘metallic'states has
long been well known, and the method of recov
-; eringfgold most widely used heretofore has con
85 sisted in passing gold bearing sands or ground
over silvered copper plates whose surfaces have
been treated with mercury. Although this old
method of gold recovery is still widely used, it is
‘ 46. being gradually discarded in favor of more mod
ern methods, since it is now well known that only
a fair percentage of gold in any material is re
r. .
companying drawings, wherein
Fig/1 is a perspective view of the machine,v
illustrating the removal of the discharge end
spout and a partial Withdrawal of the plates.
Fig. 2 is a partial elevation, showing the driv
of the plates.
" by oxidized coatings are removed from free gold, .
the improved details of construction, the pre-‘
tion, and wherein there is contained a plurality
plates by direct impact, and also taking advan- ‘
, tage. of the abrasive effect of the material where
reduced to ‘ a
ferred‘ forms of which are illustrated ‘in the ac
ing gears.
to contact with the plates in its passage, thereby
e?ecting a cleaning action of the pulplupon the
In'accomplishing these objects,.I have provided
therethrough of pulverized material from the mill
‘discharge or the flow from the sluicing opera—
‘ of quickened plates that are associated with
‘ means in the housing for causing all solid matter
In view of'the above mentioned disadvantage
of amalgamators as heretofore‘ used, it has been
the object of this invention to provide a machine
-Fig. 3 is a detail in perspective of a part of one '
Fig, 4 is a central, longitudinal section‘ of the
Fig. 5 is an end elevationshowing the driving
Fig. 6 is a cross section on line 6-.-6 in Fig. 4.
Brie?y described, the present invention com
prises .a cylindrical housing that may be disposed
horizontally, or substantially in a horizontal po
sition, and rotated. This housing is equipped in~v
teriorly along its walls with spaced, longitudi-'
nally extending ribs or ?anges, whereby the sand ‘
in a placer operation, or pulverized material in at?
a milling operation, delivered into one end of the
rotating housing, will be caused’ to be turned and
rolled in its passage to the opposite discharge end
of the housing. Supported within the housing,
lengthwise thereof, by a removable frame con
struction, are quickened plates against which the
moving material is caused to contact in its pas;
sage through the housing as it is rolled over and
over and Washed through‘ the ‘ machine.
spider which supports the quickened plates may
be loosened and then bodily removed'from the
housing for cleaning the gold from the plates.
covered thereby. The low percentage of recovery ‘ 1 Referring more in detail tolthe drawings-— ‘ ' 4'5
40 *
is the result of many causes, among them being
The cylindrical drum, designated in its en
45 ‘a too rapid ?ow of water to allow the ?ne gold tirety by reference numeral I and constituting
to settle and the accumulation of a metallic ?lm what is referred to as’ the housing of the amalga
on the surface of the mercury from the base
metals in the material which prevents either
free or pre-amalgamated gold from contacting
50 the plates, thus causing considerable loss in
mator, is supported horizontally, orslightly in
clined downwardly from its receiving to its dis-r
charge end, for axial rotation upon‘ a portable
base frame structure. This structure ‘comprises 501
parallel, opposite side beams 2 and? Z'Whichv are
Many mechanical devices have been developed
joined across their corresponding‘ ends" by beams
in recent years for the recovery of ?ne gold by
3 and 3', forming a rigid and substantial base.‘
amalgamation, but the problem of 'bringing‘?ne Fixed‘upon the base frame at its, cornersarei
55 l‘material into contact with quickened'plateslor ‘ grooved rollers 4 mounted bylhousings 5‘and‘ar--'
2,124,205 ,
ranged for the support of the drum for rotation
thereon as will be understood best by reference
to Fig. 6.
The drum or housing I is equipped at its op
posite ends with annular closure disks ‘I and 8,
which, as noted in Figs. 1 and 4, are of larger
into the ends of the spider arms to engage with
the ribs to retain the frame at a set position.
Supported on the shaft 40, just within each of
the spider frames 4| and 42, are plate support
ing spiders 50 and 5|, each having a plurality of
radial arms, corresponding in number and ex
tending into the spaces between the longitudinal
ribs, as observed in Fig. 6, corresponding arms
of the spider frames 50 and 5|, at opposite ends
of the frame, support the quickened baffle plates 10
It will'be observed by reference to Fig. 5, that 50.‘ ‘These plates, as observed by reference to
a driving ring gear I0 is ?xed concentrically to, ‘ Fig. 6, are disposed in planes radial of the lon
the disk ‘I and this gear is driven by a pinion ||~ " git'udinal axis of the machine and extend from
supported in mesh therewith on a driving shaft the central shaft into close, spaced proximity
along their outer longitudinal edges to the side 15
15 I2, which shaft is revolubly contained in a walls of‘ the housing. Each plate is made of cop
mounting bearing l3. The shaft may be rotate‘
diameter than the drum, and each resting at its
lower edge within the grooves of paired rollers
5, thereby to support the housing for easy rota
ably driven by any suitable means, such as by " per and is‘ plated with silver.
a driven belt operating over-avbelt pulley_.|4 ?xed
These plates are
what are referred to as “quickened plates”. The
core shaft 40 which supports the quickened
In Fig. 4, it will be noted that the end disk 1 I plates, as Well as the baffles formed by the lon 20
which ‘closes the receiving end of the housing, gitudinal ribs .25, are of aluminum.
It vwill be noted also by reference to Fig. 4,
has a circular, concentric opening l5 over which
a collar I6 is ?tted. Thecollar is secured by
bolts |'| that. are extended therethrough and
through the disk, and having wing nuts |‘|’
threaded onto theirouter ends. Thevcollar pro
vides a central opening |8 into the housing about
which opening ‘is an inwardly extending and in—
wardly. ?ared conical ?ange |9.
' '
The disk 8 that closes the outlet end of the
housing likewise has a relatively large central
opening 20, and, over this is ?tted a’closure plate
2| secured by bolts 24 and wing nuts 24', and
having a large central opening 22 from which ex-v
tends an outwardly ?ared discharge spout 23. ‘
Extending lengthwise of the housing |, at
equally spaced apart intervals, are ribs 25, here
shown to be six in number.
These are ?xed at
their ends to the annular disks] and 8 bymeans
. of bolts‘ 21.
The spaces between adjacent ribs
" are closed by wall plates 2|, as seen best in Fig.
6, and these are secured by bolts 28 extended
through their edges and threaded into shoulders
25' projecting laterally from theopposite sides
of the ribs.
In the use of the device, it is understood that
a certain amount of mercury is allowed to run
free in the drum, and in order that the interior
of the housing may notbe acted upon by this
mercury, the plates 2| are vulcanized on their
inside stu'faces with a layer of rubber 29.
The longitudinal ribs 25 are relatively thin and
extend a substantial. distance toward the central
axis of .the. drum andthereby operate as baffles
whereby, incident to rotation of the drum, the
‘sand or milled material passed through the de
vice will be caused to be rolledand turned, over‘
and over, incident to the rotation.
The ba?ie forming portions of ‘the several ribs
60. 25 are recessed, or, cut awayfor a spaced interval
at the receiving end of the machine, as will be
noted in Fig. 4 so as to leave a clear annularv
space within the drum adjacent the plate 1 for
a better distribution of sand, as received, to the
spaces between the various ribs; itbeing?undera
’ stood thatin ,use of the device, the material to
be treated is delivered with a, ?ow of water intov
the machine through the opening l8 from a pipe‘
or the like, as designated at 35.
that a conical closure piece 62 is ?xedhcoaxially
of the spout 23 with its base engaged against the
spider arms 4|, leaving an annular outlet 53
into the spout. The cone is supported in place
by three equally spaced plates 64 ?xed in the
spout 23 in planes axially radial thereof. Also,
an annular ?ange 10 is ?xed just within the
mouth of the spout 23 to catch any free mer
Each of the plates 60 has a bar or rib 65 ?xed
to its outer
the bar are
the ends of
are held in
longitudinal edge, and the ends of
adapted to dove-tail into slots 66 in
the arms of spiders 50 and 5|, and 3,51
place by bolts 61 extended through
the dovetailed parts.
Assuming the device to beiso constructed, and
properly charged with mercury, and assuming it
to be designed to receive material, such as sluiced
sand or crushed ore, into its receiving end, it is
apparent that with the drum in rotation, this
material, as washed through, will be caused to
be turned . over and over byv the ba?ies and
thrown time after time into contact with the 45;
quickened plates 60. This action not only brings
all of the solid material against the plates, but it
effects an'automatic cleaning of the latter to keep
them from fouling. Furthermore, the action of
the machine which throws the material into con
stant contact, has
which removes the
collect on particles
When it becomes
an abrasive effect thereon
oxidizing coating that may
of free gold.
desirable to clean the quick
ened plates 60for the ‘removal of gold, the set
screws 45 are loosened.
The collar 2| is re
moved fromthemachine, and then the entire
frame, withvthe plates therein, is ‘bodily moved
endwise, from the dischargeend of the machine,
as indicated in Fig. 1.
The plates 60 may then
be removed from their supporting spiders .by re
moval of bolts 51 and cleaned, then. replaced, and‘
the parts moved back-again to an assembled
operating relationship.
_It is a feature of this construction that the
spiders, 50 and 5| may be rotatably adjusted on
thesupporting shaft 40 to locate the quickened'
plates closer to or farther from the ba?ies from
Supported longitudinally and axially Within the ,
which material is poured thereover incident to
housing is-a shaft 40. This isrigidly supported
at its opposite ends =by'spider, frames 4| and 42,,
the radial legs of which-are grooved to, slidably
receive thereinqthe inner edges of certain ribs,
752: of the housingmand set screws 45 are threaded
rotation of the drum. This will be understood.
by reference to Fig. 6 wherein’ the drum is ro
tating clockwise and a close adjustment of plates
to the baiiles .is indicated in dotted lines.
,This machine is relatively inexpensive to con- 75;;
struct, is readily portable and can be'driven by
use of a one-horsepower motor.
By the present means, a method of forcing
all solid matter into direct contact with the amal
gamating machines has been employed whereby
recovery of gold reaches high percentages not
possible in ordinary amalgamators.
Having thus described my invention, what I
claim as new therein and desire to secure by
10 Letters Patent, is-—
1. An amalgamator comprising a rotary, cy
lindrical drum provided'at its opposite ends with
receiving and discharge openings, and supported
in position for turnover of material in its delivery
15 through the drum, and quickened plates sup
ported in the drum in planes radial thereof and
spaced from the walls of the drum to recurrently
receive the material thereagainst.
2. An amalgamator comprising a rotary, oy
20 lindrical drum provided at its opposite ends with
receiving and discharge openings, and supported
ings, a plurality of longitudinal baffles in‘ the
drum, extending inwardly from its side Walls to
effect the recurrent turnover of material in its
travel through the rotating drum, a frame bodily
movable into and from the drum through one
end thereof and comprising an axial shaft,
spiders ?xed to the shaft at its ends and sup 10
portingly engaged with said baffles, another set
of spiders mounted on the shaft and having ra-y
dial arms, and quickened plates mounted at their '
opposite ends in corresponding arms of the last
mentioned spiders whereby the plates are sup 15
ported for receiving the material thereagainst.
"I. An amalgamator comprising 'a rotary cy
lindrical drum having receiving and discharge
openings at its opposite ends, respectively, and
supported for a horizontal travel of material 20
currently receive the material thereagainst, and
means mounting said plates and‘ bodily remov
able from the drum.
3. An amalgamator comprising a rotary drum,
and means for adjusting the frame to vary the
spacing between the plates and ba?les.
8. A device as in claim 6, wherein the arms of
provided at its opposite ends respectively with
the ?rst mentioned spiders are grooved at their‘
ends for receiving the edges of the baffles, and
livery through the drum, and quickened plates
supported in the drum in planes radial thereof
25 and spaced inwardly from the walls thereof to re
receiving and discharge openings, means in the
drum to provide for a recurrent lifting and
down pouring of material in its passage through
the drum, and quickened plates supported in the
35 drum lengthwise thereof and spaced from the
walls of the drum to- receive the material there
4. An amalgamator comprising a rotary, cy
lindrical drum provided at its opposite ends re
lindrical drum,’ provided at its opposite ends,
respectively, with receiving and discharge open
therethrough, ba?les extended lengthwise of the
drum and radially inwardly from its side‘ walls, a
frame supported within the drum and rotatable
therewith, and quickened plates mounted by the
frame and extended lengthwise of and spaced 25
inwardly from the drum intermediate the baffles,
in position for turnover of material in its de
6. An amalgamator comprising a rotary cy
spectively with receiving and discharge openings,
are slidable along the baflles as itrackways into
and from the drum, with means associated with
said spiders for engaging the ba?ies to lock the
plate supporting frame in place in the drum.
9. A device as in claim 6, wherein the second
set of spiders is rotatable on the shaft for ad
justing'the position of the quickened plates rela
tive to the baffles.
10. A device as in claim 6, wherein the quick- .
spaced, longitudinal means in the drum for ef
fecting a recurrent turnover of material in its
ened plates are removably mounted by their‘ sup
porting arms.
travel through the rotating drum, a frame sup
ported in the drum and adapted for removal
11. An amalgamator comprising a horizontally
disposed rotary drum, means for rotating the
drum; said drum having closure plates at its 0p
posite ends provided with concentric openings for
receiving and discharge of material, baffles in
the drum, lengthwise thereof and spaced apart,
and extending inwardly from its side walls; said
baliies terminating short of the end plate at the
receiving end of the drum, and quickened plates
supported in the drum and inwardly spaced from
the outer walls of the drum, between the baffles;
to receive material thereagainst from the baffles.
12. A device as in claim 11, wherein the quick 55
ened plates are disposed in planes radial of the
drum and extend from the axis outwardly be
tween the ba?ies with their outer edges spaced
therefrom, and quickened plates supported by
said frame in planes radial of the drum and be
tween the spaced means for receiving the mate
rial thereagainst from the baffles.
5. An amalgamator comprising a rotary, cy
50 lindrical drum, provided at its opposite ends, re
spectively, with receiving and discharge open
ings, a plurality of spaced, longitudinal ba?ies
in the drum extending inwardly from its side
walls as means for e?ecting a recurrent turn
55 over of material in its travel through the rotat
ing drum, a frame supported in the drum from
said ba?ies and slidable on the baf?es into and
from the drum through one end opening thereof,
means for securing the frame in functional posi
60 tion in the drum, a plurality of quickened plates
mounted in the frame in planes radial of the
drum between adjacent baffles to receive the ma
terial thereagainst from the ba?‘les.
from the side walls of the drum.
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