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R. B. PATE & F. B. ROSE.
GONGENTRATOR.
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APPLICATION FILED mum, 1911.
1,020,220.
Patented Mar. 12, 1912'
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R. B; PATE & F. B. ROSE.
GONOENTBATOR.
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APPLICATION TILED rmm; 1011.
Patented Mar. 12, 1912.
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Attorneys.
R. B. FATE & F. B. ROSE.
OONCENTRATOR.
APPLICATION FILED FEB. 2, 1911.
Patented Mar. 12, 1912.
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STATES PATENT OFFICE.
ROBFIR'I‘ B. FATE, OF OAKLAND, CALIFORNIA, AND FRANK B. ROSE, OF ONEIDA, NEW
YORK.
CONCENTRATOR.
Speci?cation of Letters Patent.
1,020,220.
Patented Mar. 12,1912.
Application ?led {February 2, 1911. Serial No. 606,194.
To all whom it may concern:
preference on the following scale, that is to
55
‘Be it known that we, ROBERT B. PATE say those of the screen 5 will be 3- of an inch
and FRANK B. Rosa, citizens of the United in diameter, those of the screen 6, 12: of an
States, residing, respectively, at Oakland inch, those of the screen 7 , 13g of an inch,
and Oneida, in the counties of Alameda and and those of the screen 8, 3,; of an inch. The
Madison, States of California and New proportions between the openings in the se
York, have invented a new and useful Con
centrator, of which the following is a speci
?cation.
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15
This invention relates generally to con
centrators, and particularly to one of that ments, as in handling different kinds of
class adapted for handling gold bearing clay or dirt it may be necessary to vary the
earth in a dry state, such as is found upon proportions between the openings of the
the plains of Arizona, and where water is different screens. These screens are made of
not obtainable for the purpose of washing heavy sheet steel, preferably about of an
inch in thickness in order to enable them to
the tailings from the auriferous dirt.
The object of the invention is in a ready, withstand the rough usage to which they
practical, economical and rapid manner to will be necessarily subjected in use, and each
separate ?our gold and nuggets from earth,
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25
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70
screen may be made as a single structure, or
gravel and any trash containing them, to be constructed from plates riveted or other
conserve the former, and discharge the lat wise secured together.
The inner screen is secured to two spiders
ter, the operation being continuous and re
75
quiring but small power, and thus a mini 9 and 10, the arms of each of which are
mum expense in carrying out the procedure. provided at their outer ends with out
WVith the above and other objects in view, turned extensions 11 and 12, the former be
as will appear as the nature of the inven
30
60
ries of screens above stated, have been found
to secure the most satisfactory results, but
it is to be understood that the invention is
not to be limited to these precise measure
tion is better understood, the same consists
in the novel construction and combination
of parts of a concentrator, as will be herein
after fully described and claimed.
In the accompanying drawings forming a
part of this speci?cation, and in which like
characters of reference indicate correspond
ing parts :-—Figure 1 is a view in side eleva
ing riveted or otherwise secured to the screen 80
5, and the latter to the interior of the neck
4: of the drum. Each of the spiders is pro
vided with a hub 13 and 14: respectively, and
these are rigidly secured to a shaft 15, the
outer end of which is journaled in a bearing 85
16 secured to the under side of a cross beam
17 that is connected with the upper ends of
standards 18, the lower ends of which are
35 tion, partly in section, of a concentrator stepped into a base beam 19, this arrange
constructed in accordance with the present ment of beams being duplicated, substan 90
invention. Fig. 2 is a top plan view. Fig. tially, at the other end of the machine, and
3 is a view in elevation, partly in section, the two sets of vertical beams 18 being held
viewed from the discharge end of the ma spaced apart by beams 20 which are ?rmly
45
chine. Fig. 4 is a fragmentary detail view, clamped into position by tie rods 21, the
beams 18 being held seated against the
viewed from the feed end of the machine.
As more clearly seen in Fig. 1, the ma beams 17 and 19 by tie rods 22. This con
chine comprises a drum embodying two fun struction of frame has been found thor
nel~shaped heads 1 and 2, the mouths of oughly effective in operation, but it is to be
which are opposed, and each of which is understood that it may be differently ar
provided with a neck 3 andllrespectively, the ranged to meet different requirements that
former constituting the feed inlet, and the may arise, and still be within the scope of
latter the discharge outlet. These heads the invention. The shaft 15 supports the
are preferably made of heavy steel, and may drum at its discharge end, its inner end be
be constructed in one piece, or of a series ing supported by the neck 3 which bears
upon anti-friction rollers 23 journaled in
of sections properly assembled.
Arranged within the drum is a series of suitable bearings upon a cross beam 24.
truncated cone-shaped foraminous screens 5, This arrangement will permit of free pas
6, 7 and 8, the openings in which, are by sage through the drum 5 of the coarser ma
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100
105
2
1,020,220
terial, the arms of the spiders being of a size where they may be further treated to recover
'
any small amount of gold that may have
Aswill be seen by reference to Fig. 1, all been carried over. As the drum is rotated
of the screens ?are toward the discharge rapidly, the‘ dirt and smaller stones and
not to interfere with the operations
outlet, and are held assembled with the gold are successively projected through the
heads by ?anged annuli 25 which are bolted successive screens, the tailings being dis 70
or otherwise secured to the heads, and to the charged down the chute 31, and the aurifer
screens.
10
ous earth being collected in the pockets or
At the discharge end of the machine, crotches 28 between the bottoms of the battles
there is arranged between each pair of and the inner wall of the head 3, and when
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screens, a dished baffle 26, that ?ares toward the ?nal separation takes place, the ?our
15
the feed end of the drum, each being pro~ gold and very small nuggets pass through
vided with a ?ange 27 by which it may be the screen 8 and fall into a screening pan 46
bolted or riveted to the head 2. Each battle with which the screening chute connects.
is spaced from the adjacent screen a su?i The coarser gold in the form of nuggets set
cient distance to permit of a passage be tles in the bottom of the screen 8 whence it 80
tween it and the edge of the baffle of the escapes to the screening chute.
gold~bearing material, which will settle
. Any suitable means may be employed for
down into the crotch 28 formed between the driving the drum, that herein shown con
20 sides of the ba?ies and the wall of the head sisting of an annular sheave 47 which is 85
2, the coarser particles passing out through driven from any practical source of power
openings 29 which are arranged circumfer not necessary to be shown.
entially of the head 2 and lie within the
It will be seen from the foregoing descrip
26
plane of the ?anges 27 of the battles, the tion, that although the improvements here
openings being formed by cutting an in in set forth are simple in character, that
cision and pressing the metal inward to pro they will be thoroughly efficient for the pur
vide ?ngers 30 which operate to agitate the poses designed, and will cooperate in a
coarser .material and force it to escape rapid and efficient separation of gold from
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through the tailings chute 31, as shown in the earth that contains it.
30
Fig. 1, this chute being supported at its
outerend by bars 32 secured respectively to
lVhat is claimed as new is :—
1. A concentrator comprising a rotatable.
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the chute and to the vertical beams 18.
drum embodying a pair of. funnel-shaped
The ?ner materials as they pass through heads the mouths of which are opposed, a
the successive screens ?nally reach the plurality of nested foraminous screens con~
35
40
screen 8, through which they escape to the
screening chute 33 which, as shown in Fig.
2, is at its upper end commensurate in width
with the space bet-ween the two annuli 25,
necting the heads, dish-shaped baffles ar
ranged at the discharge end of the drum
and operating to prevent the escape of gold
but to permit and accelerate the discharge
the lower portion being slightly constricted. of the tailings, and inward projecting ?n
Connected with the lower end of the screen~ gers carried by the head at the discharge
ing chute is a suction box 34; in which is ar
ranged a ?ne mesh screen 35 and above the
same a shaker screen 36.
The suction box
has an inclined bottom 37 which in con
45
end of the drum to agitate the material and
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105
prevent clogging.
2. A concentrator comprising a rotatable
drum embodying a pair of funnel-shaped
junction with the wall 38 of the box forms heads the mouths of which are opposed, and
a discharge mouth 39 through which the each of which terminates at its smaller end
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gold is discharged into a suitable receptacle. in a neck, one of which constitutes a feed
50
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The upper wall of the suction box is cone
‘shaped and has connected with it one end of
a pipe 40, the other end of which opens into
a trap 41 having depending from its top a
baffle 112. Connected with the trap on the
inlet and the other a discharge outlet, a
plurality of nested foraminous screens con
necting the heads, the openings in the inner
screen being the largest, and those in the
succeeding screens being gradually decreased
side opposite that entered by the pipe 40 is in diameter, dish-shaped ba?ies arranged at
a pipe 43 that connects with a casing of an the discharge end of the drum and operat
exhaust fan 4:4:
ing to prevent the escape of the gold, but
In the operation of the device, the au to permit and accelerate the discharge of
115
120
riferous material, including sticks, gravels, the tailings, and means to agitate the mate
and other trash, is fed by any suitable means rials at the discharge end to prevent clog
into the inlet 3, and passes to the screen 5
ging.
where the larger pebbles and trash are sepa—
3. A concentrator comprising a rotatable
rated from the ?ner, and pass out through drum embodying a pair of funnel-shaped
the discharge end 4 to the tailings chute 31, heads the mouths of which are opposed, and
and onto a conveyer belt 115, driven from any each of which terminates at its smaller end
suitable source of power, and which will
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in a neck, one of which constitutes a feed in
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transfer the separated materials to a place let and the other a discharge outlet, a plu 130
1,020,220
rality of nested foraminous screens connect
8
upon the chute whereby to conserve the ?ne
ing the heads, the openings in the inner or ?our gold that might otherwise escape.
screen being the largest, and those in the
In testimony that we claim the foregoing
succeeding screens being gradually decreased as our own, We have hereto a?ixed our sig
in diameter, dish-shaped ba?les arranged at natures in the presence of two witnesses.
ROBERT B. PATE.
the discharge end of the drum and operat
FRANK B. ROSE.
ing to prevent the escape of the gold, but to
permit and accelerate the discharge of the
Witnesses:
tailings, a screening chute communicating
GEORGE OARRINGTON,
10 with the drum, and means to exert a suction
HENRY WUPPERMAN.
d‘opies of this patent may be obtained for ?ve cents each, by addressing the "Commissioner of Patents,
Washington, D. C.”