An Improved Amalgamator for Extraction of Gold and Silver from the Ore by the Action of Mercury.
Year: 1890

page_text: Date of Application, 3rd Feb., 1890
Complete Specification Left, 17th Apr., 1890-Accepted, 14th June, 1890°
PROVISIONAL SPECIFICATION.
An Improved Amalgamator for Extraction of Gold and Silver from
the Ore by the Action of Mercury.
I, CHARLES PFEIFFER, Engineer of 5 Hanover Buildings, Barnham Street Tooley
Street London S.E. do hereby declare the nature of this invention to be as
follows:--
I construct of iron a machine by means of which gold & silver can be extracted
from the ore by the action of mercury, and I construct it in the following manner:
I cast two cylinders (A) and (B) and having fitted them in the following way: the
outside cylinder A is fixed stationery on the cast iron back (C) by means of screws, a
toe piece (II) is fitted in the bottom of (A) for spindle (I).
The cylinder (B) is fitted on spindle (I) and revolves inside of cylinder (A). In
the boss of cylinder (13) there are six receiving ports (6) as shown in figure (B) (II)
which lead through the bottom of cylinder (B) into the chamber (4) through the
charging ports (5) immediately behind agitators (III) as shewn in figure (B) (I) into
the open space between cylinder (B) and cylinder (A). The improvements and
advantages are claimed for this my invention are these: that I extract more metal
and by a quicker process, owing through the ore being forced through the mercury,
than by the older methods.
Dated this First day of February 1890
CHARLES PFEIFFER,
5, Hanover Buildings, Barnham Street, Tooley Street, London, Engineer.
COMPLETE SPECIFICATION.
An Improved Amalgamator for Extraction of Gold and Silver from
the Ore by the Action of Mercury.
I, CHARLES PFEIFFER, Engineer of 5 Hanover Buildings Barnham Street Tooley
Street London S.E. 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, reference being made to the drawings accompanying
my provisional specification:-
I constructed of iron a machine by means of which gold and silver can be extracted
from the ore by the action of mercury and I constructed it in the following manner:
I cast two cylinders A & B and having fitted them in the following way: the
outside cylinder A is fixed stationery on the cast iron back C by means of screws, a
toe piece II is fitted in the bottom of A for spindle I. The cylinder B is fitted on
spindle I and revolves inside of cylinder A. In the boss of cylinder B there are six
receiving ports (6) as shewn in figure B II which lead through the bottom of
cylinder B into the chamber (4) through the charging ports 5 immediately behind
agitators (3) as shewn in figure B' into the open space between cylinder B and
cylinder A.
The method of operating with the machine is in the following manner.
I work the cylinder B which is made fast to spindle 1. and by which it is put in
connection to a motive power to a speed of 300 revolt. per minute, having done
thise, I charge the machine through a pipe, (gas or steam pipe) which passes
through S and ended close to charging ports 6, with mercury, through which it is
forced by the centrifugal action of the machine, and passes through chamber 4 and
ports 5 behind agitators 3, as shewn in Fig. B' (the agitators which are made fast
to cylinder B and revolving with the same ar acting like a fan) and thrown by the
Paine il

page_text: same into the open space between cylinder B and cylinder A till it forms a solid wall
without overflowing through 9, and which will remain in the same solid state as long
as the machine is in motion, having the mercury into the machine. I put the ore in,
which is made in a liquid state by mixing it up with water, in the same manner as
the mercury, but as the ore is a much lighter substance than the mercury and unable
to lift that wall of mercury so it is forced through the same and escaped through 9.
Having now particularly described and ascertained the nature of my said inven
tion and in what manner the same is to be performed, I declare that what I
claim is,
I That I forced the ore through the mercury by centrifugal force.
II. That I extract more metal frome the ore and by a quicker process with my
machine owing to the ore being forced through the mercury than by the older
methods.
chi hundred and ninety (1890)
Dated this Sixteenth day of a
CHARLES PFEIFFER,
5, Hanover Buildings, Barnham Street, Tooley Street, London, S.E., Engineer.