Improvements in and relating to "Frue-Vanners" for Treating Auriferous Ores.
Year: 1895

page_text: Date of Application, 8th Aug., 1895
Complete Specification Left, 3rd June, 1896-Accepted, 4th July, 1896
PROVISIONAL SPECIFICATION.
Improvements in and relating to "Frue-Vanners" for Treating
Auriferous Ores.
I, JAMES DICK, of Greenhead, in the County of the City of Glasgow, Manu-
facturer, do hereby declare the nature of my invention to be as follows:-
This invention relates to improvements in "Frue-Vanners "
auriferous ores.
for treating
These "Frue-Vanners consist of an endless band which receives a forward
travelling and a transverse or jigging motion, and carries the ores to separate the
pyrites from the sand. The band is set over pulleys at an angle and the ore fed
on at its lower end gets the sand washed away from it by a current of water
flowing downwards from upper end of inclined band, the auriferous residue left on
band being delivered into and trapped by a washing vat or trough through which
the band passes on its return motion.
Heretofore these "Frue-Vanners
have been formed of a flat smooth base
of india rubber with vertical or inclined projecting up sides all made in one
piece.
My invention consists in providing a contact surface for the ores, consisting of
woolen, mohair, cotton, jute silk, or like cloth or material, or a combination of
these, on to which the heavy portion comprising particles of gold or pyrites will by
the frictional contact of the cloth be more effectually prevented from being washed
away along with the sand or lighter portion of the ore by the action of the stream
of water.
This would or may be carried into practice by cementing the cloth on to a band
consisting of plies of gutta percha solutionized canvas, and cementing strips ot
rubber to form the projecting up sides of the “Frue-Vanner." Or the cloth may
be cemented on to form the upper ore contact surface of the ordinary rubber
"Frue-Vanner."
Dated the 7th day of Amoust 1895
W. R. M. THOMSON & Co.,
96 Buchanan Street, Glasgow, Agents.
CODE LEIE
DIECIFICATION.
Improvements in and relating to "Frue-Vanners" for Treating
Auriferous Ores.
I, JAMES DICK, of Greenhead, in the County of the City of Glasgow, Manu-
facturer, do hereby declare the nature of my 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 that is to say :-
This invention relates to improvements in and relating to Frue-Vanners or
Frue-Vanner aprons for treating auriferous ores.
These Frue-Vanner aprons consist of an endless band which receives a forward
travelling and a transverse or jigging motion and carries the ores to separate the
Price 8d.1

page_text: pyrites and gold from the sand. The band is set over pulleys at an angle and the
ore fed on at its lower end and gets the sand washed away from it by a current of
water flowing downwards from upper end of inclined band the auriferous residue
left on band being delivered into and trapped by a washing vat through which the
band passes on its return motion.
Heretofore these Frue-Vanners aprons have been formed of a flat smooth
base of india rubber with vertical projecting up sides all made in one piece.
My invention consists in providing a contact surface for the ores consisting of
woollen cloth on to which the heavy portion comprising particles of gold or pyrites
will by the frictional contact of the cloth be more effectually prevented from being
washed away along with the sand or lighter portion of the ore by the action of the
stream of water. I have found that at least one third more gold or pyrites is
recovered from being lost when treated with the woollen cloth ore contact surface
as compared with the rubber surface aprons heretofore in use.
In the accompanying drawing Figure 1 illustrates in perspective a portion of a
Frue-Vanner apron as formed in accordance with my improvements, and Figure 2
is a transverse section of a modified form of apron. In Figure 1 the portions a a repre-
sent two plies of woollen cloth known as "Melton " cemented together by a solution
of gutta percha. The parts marked b represent strips of india rubber which are
cemented parallelly along the side edges of the upper surface of the cloth. After
the upper surface a gets worn, the side rubber strips 6 would be detached and
cemented on to the opposite surface a 1 which would be reversed to form the ore
contact surface; but when this is not desired the under part may as shown in
Figure 2 be formed of a "backing" of one or more plies of gutta percha solu-
tionized canvas c or other strong web fabric, or of india rubber.
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 :-
First. A Frue-Vanner apron formed of woollen cloth material substantially as
and for the purposes set forth.
Second. A Frue-Vanner apron for treating auriferous ores formed of the
combination of a woollen cloth ore contact surface, parallel projecting up side
strips, and one or more plies of "backing" material, substantially as set forth.
Dated this 2nd day of June 1806
W. R. M. THOMSON & CO.,
96 Buchanan Street, Glasgow, Agents.
W. R. M. THOMSON & CO.,
96 Buchanan Street, Glasgow, Agents.