Improved Jigging Machine for Washing Coal and the like.
Year: 1896

page_text: Date of Application, 13th Jan., 1896-Accepted; 13th Jan., 1897
COMPLETE SPECIFICATION.
Improved Jigging Machine for Washing Coal and the like.
I, CHRIST SIMON, of Herne in the Province of Westphalia, in the Empire of
Germany, Draughtsman, 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 :-
The machine jiggers hitherto employed have the disadvantage that the water
when jigging, flows over or back partly under the first stone pusher and partly
through the sieve into the space between the two slides which form the inner space
for the sieve jigging and then into the outer space for the removal of the material.
This is explained by the fact that this space is separated from the others and that
consequently the water in the same is stationary, as well as to the tendency of
water in both spaces to find its level.
The washing under the first pusher is defective because the stones or ores washed
there are washed away too quickly. As soon as the overflow of water is prevented
the stones or ores can collect at suitable points and compensate the weight of those-
in the jigger sieve. Since only such of the material will be removed as is displaced
by the weight of the bed of material on the sieve, the removal will be regulated
automatically.
This forms the object of the present invention and I will now proceed to describe
the same with reference to the accompanying drawings in which similar letters
denote similar parts throughout the several views:-
Fig. 1 is a vertical section through an ordinary jigging machine, with those parts.
which are unnecessary for the explanation of the invention omitted,
Fig. 2 is a plan of Figure 1,
Fig. 3 shows a jigging machine according to the present invention and
Fig. 4 is a plan of Figure 3.
A is the collecting space for the heavy material, B the space between the slides,.
or washing space, C the sieve, D an orifice in the wall F, E the outer space,.
F the inner and G the outer wall, H the first and J the second slide, K the outlet
for the heavy material and L the pressure piston or plunger.
The object of the invention may be obtained in two ways, first by increasing the
distance apart of the slides, which if increased to a considerable extent beyond the
present distance of 200 millimetres would effect an approximate compensation and
a more regular passage of the material. The object will however be attained with.
the present arrangement of the slides and a back flow of water will be prevented
by entirely covering up the space between the slides and thus preventing the back
flow of the water into the same, and also preventing the material from being
washed too quickly through the slides into the delivery spaces. The same effect
will be attained by making an orifice or orifices in the inner wall F of the apparatus
as shown at D such orifices having advantageously a total area of about 450
millimetres.
By an arrangement of this kind the pieces of ore will be able to collect between
the slides and remain the proper time there, to allow of their being properly
washed. The heavier parts will be moved or passed on to their outlet solely by
the surplus of weight of the material on the sieve and will not be washed or thrown
over the second slide by the agitation of the water, in which case very often a

page_text: considerable quantity of the lighter material was carried off with the heavy
substances.
The slides are mounted on suitable levers controlled by a hand lever so that
when the first slide is lowered the second will be raised and vice versa.
The slides are a kind of regulating device acting like a lock and consisting of
two lock gates or slides: These serve to let certain quantity of ore or coal through
each time they are changed. The gates are coupled so that when one is raised
the other is closed. Supposing the ore or coal to have passed under the first slide
and to have filled the space between the first and second the second is raised and
the first lowered so that no new ore or coal can pass between the slides until they
are again reversed, and in the mean time the ore or coal between the slides passes
to the outlet after having been jigged.
Having now particularly described and ascertained the nature of my inven-
tion and in what manner the same is to be performed 1 declare that what I
claim is :-
A jigging machine in which the passage of the heavy material through the
apparatus is regulated automatically and without the aid of the throttling slides in
that the same is allowed to settle properly in the space between the slides.
Deted this 18th day of December 1906
HASELTINE, LAKE & Co.,
45 Southampton Buildings, London, W.C., Agents for the Applicant.