IMPROVEMENTS IN APPARATUS FOR WASHING AND SEPARATING ORES AND OTHER MATERIALS
Year: 1868

page_text: LETTERS PATENT to George Davies, of No. 1, Serle Street, Lincoln's
Inn, in the County of Middlesex, and No. 87, Saint Vincent Street,
in the City of Glasgow, Civil Engineer and Patent Agent, for the
Invention of "IMPROVEMENTS IN APPARATUS FOR WASHING AND SEPARATING
ORES AND OTHER MATERIALS."-A communication from abroad by
Max Braun, of Vicille, Montagne, in Westphalia.
Sealed the 2nd October 1868, and dated the 4th April 1868.
PROVISIONAL SPECIFICATION left by the said George Davies at
the Office of the Commissioners of Patents, with his Petition, on
the 4th April 1868.
I, GEORGE DAVIES, of No. 1, Serle Street, Lincoln's Inn, in the
County of Middlesex, and No. 87, Saint Vincent Street, in the City of
Glasgow, Civil Engineer and Patent Agent, do hereby declare the
nature of the said Invention for "IMPROVEMENTS IN APPARATUS FOR
WASHING AND SEPARATING ORES AND OTHER MATERIALS," (a communication
to me from abroad by Max Braun, of Vieille, Montagne, in West-
phalia,) to be as follows:-

page_text: This Invention relates to improved apparatus by means of which cros
and other materials may be washed and separated in a continuous, rapid,
and economical manner. This apparatus comprises a sieve or perforated
plate slightly inclined from the horizontal and fixed in a cistern or
hutch, in another part of which a plunger is made to reciprocate by
a revolving crank or equivalent means. The cistern is filled with water,
and the action of the plunger causes the water to work up and down
through the sieve. The bottom of the cistern is by preference of a semi-
circular form. The apparatus also comprises a hopper into which the
ores or materials arc put after having been crushed and through which
a small stream of water flows. The materials pass gradually from the
hopper by a regulated opening down upon the upper end of the sieve
and gradually work their way to the lower end thereof. The jigging
action of the water causes. the materials to be separated into layers
according to their specific gravities. Three discharge ducts are fitted
to the casing of the cistern above the lower end of the sieve, and the
lightest portions of the materials pass off by the uppermost duct, whilst
the heaviest or the washed and separated ores pass off by the bottom
one. The materials discharged by the middle duct are termed "seconds,"
and are in general put through the apparatus a second time to complete
their washing and separation. The discharge ducts receive the materials
through openings in the casing, which openings are proportioned as
regards their number and size to suit the materials operated upon. Fine
particles which pass through the sieve fall to the bottom of tho hutch,
and are removed when necessary by an outlet valve provided for the
purpose. A sufficient supply of water is maintained by an inlet pipe,
which is by preference situated a little below the plunger.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said George Davies in the Great Seal Patent Office
on the 3rd October 1868.
TO ALL TO WHOM THESE PRESENTS SHALL COME, GEORGE
DAVIES, of No. 1; Serle Street, Lincoln's Inn, in the County of
Middlesex, and. No. 87, St. Vincent Street, in the City of Glasgow,
Civil Engineer and Patent Agent, send greeting..
3

page_text: WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Fourth day of April, in the year
of our Lord One thousand eight hundred and sixty-eight, in the
thirty-first year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto me, the said George Davies, Her special licence®
that I, the said George Davies, my executors, administrators, and
assigns, or such others as I, the said George Davies, my exccutors,.
administrators, and assigns, should at any time agree with, and no
others, from time to time and at all times thereafter during the term
therein expressed,. should and lawfully might make, use, exercise, and
vend, within the United Kingdom of Great Britain and Island, the
Channel Islands, and Isle of Man, an Invention for "IMPROVEMENTS
IN APPARATUS FOR WASHING AND SEPARATING ORES AND OTHER MATERIALS," (a
communication to me from abroad by Max: Braun, of Vieille, Mon-
tagne, in Westphalia,) upon the condition (amongst others) that I, the
said George Davies, my executors or administrators;. by an instrument
in writing under my,, or their, or one of their hands and seals, should.
particularly describe and ascertain the nature of the said Invention,
and in what manner the same was. to be performed, and cause the
same to be filed in the Great Scal Patent Office within six calendar
months next and immediately after the date of the said Letters Patent.
NOW KNOW YE,. that I, the said George Davies, do hereby
declare the nature of the said Invention, and in what manner the
same is to be performed, to be particularly described and ascertained
in and by the following statement in writing, reference being had to
the accompanying, Drawings,, that is to say :-
The said Invention relates to improved apparatus by means of which
ores and other materials may be washed and separated in a continuous,.
rapid, and economical manner..
And in order that the said Invention and the manner of performing:
the same may be properly understood, I have hereunto appended a Sheet.
of explanatory Drawings to be hercin-after referred to, and representing
a jigging or washing and separating machine as constructed with the.
improvements.
Figure 1 is a perspective view of the machine; Figure 2 is a plan;
and Figure 3 is an end elevation partly in section. The same-reference
numerals are used to mark the same or like parts in all the
Figures..

page_text: The improved apparatus comprises a cistern or hutch 1 of an approxi-
inately semicircular form, with two casings 2, 3, projecting up therefrom.
One casing 2 is open topped, and has fixed in at a suitable level
below tlie upper edges a sieve or perforated plate 4, 5, which is slightly
inclined from the horizontal, one end 4 being higher than the other.
In the other casing 3 a plunger 6 is made to reciprocate by means of
an eccentric 7, or its equivalent, on a revolving shaft 8. The cistern 1
is filled with water, and the action of the plunger 6 causes the water
to work up and down through the sieve 4, 5. At the higher end 4 of
the sieve there is an inclined hopper 9; into which the ores or materials
to be operated upon are put after having been crushed and classified,
this classifying being effected by means of a revolving riddle or equi-
valent apparatus. A small stream of water is led into the hopper 9 by
a pipe. 10, and the materials pass gradually from the hopper 9 by a
regulated opening 11 down upon the upper end 4 of the sieve, which is of
a finer mesh than the riddle used for classifying, so that the materials do
not pass through it but gradually work their way to the lower end 5.
The jigging action of the water causes the materials to be separated
into layers according to their specific gravities. Three discharge ducts
12, 13, 14, are fitted to the casing 2 above the lower end 5 of the
sieve, and the lightest portions of the materials pass off by the upper-
most duct 12, whilst the heaviest or the washed and separated ores pass
off by the bottom one 14. The materials discharged by the middle duct 13
are termed "seconds," and are in general put through the apparatus
a second time to complete their washing and separation. The number
of discharge ducts may be varied to suit different materials. The
discharge ducts 12, 13, 14, receive the materials through openings in
the end of the casing, which openings may be proportioned as regards
their number and size to suit the materials operated upon. Such fine
particles as pass through the sievo 4, 5, fall to the bottom of the
hutch 1, and are removed when necessary by an outlet valve 15 pro-
vided for the purpose. A sufficient supply of water is maintained
within the hutch by an inlet pipe 16, which is by preference situated
a little below the plunger 6. The hutch 1 and casings 2, 3, may be
constructed of sheet iron strengthened by angle iron and wrought or
cast iron frames, or in any other convenient manner. When operating
upon some materials it will be advantageous to arrange two or more
sieves either in the same or in separate hutches for the materials, or
some of them, to pass over in succession. Thus the middle discharge

page_text: duct 13 may be arranged to lead the "seconds" upon a second machine
placed at a lower level, so that the separation may be continued without
further hand labor.
Having thus particularly described the said Invention, and the manner
in which the same is to be performed, I have to state that I do not
claim as new all parts and arrangements I have had occasion to describe;
but that what I believe to be new, and do claim as the Invention secured
to me by the hercin-before in part recited Letters Patent is, the
arranging of the parts of apparatus for washing and separating ores
and other materials, and more particularly the feeding and discharging
details, so as to obtain a continuous action, substantially as hercin-before
described.
In witness whereof, I, the said George. Davics, have hereunto
set my hand and scal, this Second day of October, in the year
of our Lord One thousand cight hundred and sixty-eight.
GEORGE DAVIES (1.5)
GEORGE DAVIES (LS)