An Improved Pump for Mining and other Purposes.
Year: 1896

page_text: Date of Application, 18th Feb., 1896
Complete Specification Left, 24th July, 1896-Accepted, 29th Aug., 1896
PROVISIONAL SPECIFICATION.
An Improved Pump for Mining and other Purposes.
I, GEORGE LANSELL, of The Fortuna Crushing Works, Bendigo, in the
Colony of Victoria, Quartz Miner, do hereby declare the nature of this invention
to be as follows:-
This invention of an improved pump for mining and other purposes has been
devised for the purpose of enabling liquids to be raised in a more economical
manner than hitherto and with a lesser expenditure of power..
It consists in a pump which effects the dual purpose of raising liquids and air,
the air being led into the discharge pipe or up-take of the pump for liquids in such
a way as to assist the column of liquid raised thereby..
The precise construction and arrangement of the pump as well as the means
whereby it is operated can only be determined by circumstances, and can
obviously be varied in many ways without departing from the spirit of my
invention.
That part of the pump which acts upon the liquids might be of any ordinary
construction and either a plunger or a piston might be employed, whilst the piston
of the air pump would be provided with ordinary valves, and said pump would
also be provided with a back pressure valve in its discharge pipe as well as a foot
valve in the bottom of the cylinder.
In the event of there being water to be raised at a higher level than where the
pump is placed a pipe might be led down from the dam or tank containing it
into the water pump above the inlet valve and below the back pressure or
discharge valve through which latter it will rise by gravity to the same level
as it started from. A retention or back pressure valve is also provided in this
pipe.
One great advantage which my invention possesses for mining purposes is, that
it will not only raise water more economically than the present pumps, but it will
also materially improve the ventilation of the mine, owing to the withdrawal of
the foul air from the bottom and its consequent replacement with fresh air from the
surface.
Dated this 18th day of February One thousand eight hundred and ninety-six..
An Improved Pump for Mining and other Purposes.
I, GEORGE LANSELL, of The Fortuna Crushing Works, Bendigo, in the
Colony of Victoria, Quartz Miner, 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 object of this invention is the construction of a pump, chiefly adapted for
mining purposes, by which water and other liquids can be raised more economically

page_text: and to a greater height with less expenditure of power than is practicable with the
appliances now in use.
Its chief feature consists in its having two distinct cylinders, each fitted with a
piston and provided with the necessary valves and connections to enable the one to
be used for raising the water or other liquid and the other for forcing air into the
delivery pipe of the liquid raising cylinder.
These cylinders, pistons, valves etc. may obviously be constructed and arranged
in a variety of ways but I will describe only the arrangement which I have found
to give the best results in practice referring to the accompanying drawings.
Fig. 1 is a side elevation, Fig. 2 a plan, and Fig. 3 a vertical central section.
The same letters of reference indicate the same parts in all the figures.
A is an ordinary pump cylinder having a suction pipe B and foot valve b.
An ordinary valved piston C working in the cylinder A in its upstroke forces
the liquid past the valve d into the delivery pipe-D, which is preferably fitted, at
intervals of, say, every hundred feet, with check valves such as that indicated at d',
and it is also preferably provided at its lower end with an air vessel E to reduce
shock, as is well understood.
A second cylinder F is arranged preferably immediately above and in a line
with the cylinder A and is likewise fitted with a valved piston G which is
preferably secured upou the same piston rod H with the piston C. Weights I
may be placed on the rod H if desired to assist the downstroke of the pistons.
The delivery pipe J from the upper end of the cylinder F is led into the delivery
or uptake pipe D and is also fitted with a check valve K.
Air inlet valves L are provided in the lower end of the air cylinder F and stuffing
boxes for the piston rods are provided between the cylinders A and F.
As, in the upward stroke of the two pistons C and G, the lower forces liquid
and the upper forces air up the delivery pipe D, the column of liquid is reduced in
weight to such an extent that practically with a pump of the kind described it is
possible to force water to a height of over four hundred feet in one lift, whereas
with a corresponding pump of ordinary construction it would not be practicable to
raise it in one lift to a greater height than about two hundred and fifty feet.
When a pump of the kind described is used in a mine, the ventilation is
materially improved owing to the withdrawal of the foul air through the air
cylinder.
Instead of arranging the two pump cylinders one above the other they might
obviously be placed side by side and have separate piston rods connected by a
yoke or bridge piece. Also, instead of using pistons, the cylinders might be
fitted with rams or plungers, or one of the cylinders might have a plunger and the
other a piston.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
A pump having two distinct cylinders each fitted with a piston with the
necessary valves and connections, the one adapted to raise liquid, the other to
force air into the liquid in the delivery pipe, substantially as specified and as
illustrated in the accompanying drawings.
Dated this 24th day of July 1896.
ABEL & IMRAY,
Agents for the Applicant.