Improvements in Pumping Apparatus for Mines.
Year: 1893

page_text: Date of Application, 31st May, 1893
Complete Specification Left, 27th Feb., 1894-Accepted, 14th Apr., 1894
PROVISIONAL SPECIFICATION.
Improvements in Pumping Apparatus for Mines.
1, ANDREW BETTS BROWN, of Rosebank Iron Works, Edinburgh, in the
County of Mid Lothian, North Britain, Engineer, do hereby declare the nature of
this invention to be as follows that is to say :-
My said invention relates to mine pumping apparatus of the kind in which
pumping apparatus at the surface forces water under considerable pressure down a
pipe to work pumping apparatus down below in the mine, and my object is by an
improved combination of parts to render the working of such pumping apparatus
freer than heretofore from excessive concussive strains and generally more
satisfactory.
In carrying out my invention, the underground pumps may be of any suitable
known kind; I, however, prefer an arrangement in which two differential plungers
work each in two barrels one of which is of half the effective capacity of the
other and receives half of each discharge from the other barrel, the smaller
plunger forcing the said half into the rising pipe when the larger plunger is
drawing in its next charge; a well known arrangement whereby a pump which is
double-acting as regards its delivery requires only one set of foot or inlet valves
and one set of delivery valves.
Each of the two differential pump plungers is worked by means of a pair of
reversed plungers fixed to a single crosshead and working in a pair of reversed
single-acting motor barrels or cylinders. The crossheads of the two pairs of motor-
cylinder plungers are connected to cranks at right angles to each other on a
rotating shaft, which is provided for to & certain extent controlling and
harmonising the movements of the motor plungers, and especially for working a
valve which distributes the motive water to the motor cylinders and directs it from
them into the pipe through which it returns to the pumping apparatus at the
surface. The valve is worked by an eccentric pin on the end of the crank shaft,
and it and its accessory parts are constructed, arranged, and operate as described in
my Patent Specification No. 1305 of 1878.
Dated this Thirtieth day of May 1893.
EDMUND HUNT,
Applicant's Agent.
COMPLETE SPECIFICATION.
Improvements in Pumping Apparatus for Mines.
I, ANDREW BETTS BROWN, of Rosebank Iron Works, Edinburgh, in the
County of Mid Lothian, North Britain, Engineer, 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, that is
to say:-
My said invention relates to mine pumping apparatus of the kind in which
pumping apparatus at the surface forces water under considerable pressure down a
pipe to work pumping apparatus down below in the mine, and my object is by an
PA1

page_text: improved combination of parts to render the working of such pumping apparatus
freer than heretofore from excessive concussive strains, and generally more
satisfactory.
In carrying out my invention the underground pumps may be of any suitable
known kind either double or single acting as regards delivery. According to one
modification each pump plunger or pair of pump plungers is or are worked by
plungers working in a pair of reversed single acting motor barrels. Crossheads
fixed to the motor plungers are connected to cranks on a rotating shaft which
controls and harmonises the movements of the plungers, and which works a single
distribution valve. This valve is worked by an eccentric pin or equivalent on the
end of the crank shaft, and it and its accessory parts are constructed, arranged,
and operate as described in my Patent Specification No. 1305 of 1878.
And in order that my said invention and the manner of performing the same may
be properly understood I hereunto append three sheets of explanatory drawings
to be hereinafter referred to and showing two modifications of my improved
apparatus.
Figure, 1, on Sheet, 1, of the drawings is a plan, and Figure, 2, a side elevation
showing my improvements as applied to double acting pumping apparatus.
Figure, 3, on Sheet, 2, is an enlarged section of the distribution valve and valve
box, and Figure, 4, is an elevation showing the port face.
Figure, 5, on Sheet, 3, is a plan showing my improvements as applied to single-
acting motor and pumping apparatus.
In these drawings the same reference letters and numerals are used to mark the
same or like parts wherever they are repeated.
The
In the modification shown in Figures, 1, to 4, of the drawings, two differential
plungers, A 1, A. 2, work each in two barrels, B1, B2, and, B3, B4, one, B1, B3,
of each pair being of half the effective capacity of the other, B2, B4, and
receiving half of each discharge from the latter through pipes, C1, C2.
plungers working in the smaller barrels, B 1, B 3, force the said half back through
the pipes, C1, C2, into the rising pipe, D, when the plungers working in the
larger barrels, B2, B4, are drawing in at their next stroke. This is a well
known arrangement whereby a pump which is double-acting as regards its delivery
requires only one set of foot or inlet valves and one set of delivery valves.
The
Each of the two differential pump plungers, A1, A2, is worked through
crossheads, E1, E2, and connecting rods F 1, F 2, by means of a pair of reversed
plungers, G, fixed cach to a crosshead, H1, 112, and working in a pair of
reversed single-acting motor barrels or cylinders, J 1, J2, and, J3, J4.
crossheads, H1, H2, of the two pairs of motor cylinder plungers, G, are
connected to cranks, K1, K2, at right angles to each other on a rotating shaft, L,
which is provided for, to a certain extent controlling and harmonising the
movements of the motor plungers, G, and especially for working a valve, M,
which distributes the motive water coming from the pumping apparatus at the
surface and entering the valve box at, P, to the motor cylinders, J 1, J 2, J 3, № 4,
through the pipes, Q1, Q2, Q3, Q4, and subsequently directs it from them into
a pipe connected to the flange, R, and through which it returns to the pumping
apparatus at the surface. The distribution valve, M, is worked by an eccentric, S,
made in a piece with a hollow spindle, T, which is fixed on the end of the crank
shaft, L.
In the modification shown in Figure, 5, instead of two double-acting pairs of
motor cylinders, three are the single-acting motor cylinders, J 5, J 6, J7, the
plungers, G, of which are connected to three equidistant cranks, K 3, K 4, K 5, on
the shaft, L, and work three single-acting pumps, B5, B6, B7. A valve (M) and
valve box, N, similar to that shown in Figures, 3, and, 4, distributes the motive
water through the pipes, Q5, Q 6, Q7, to the motor cylinders, J 5, J 6, J 7.
In both modifications the several pipes, Q1, to Q7, are made of enlarged area
between their ends in order that the motion of the water in them may be slow and
cause little concussive action.

page_text: 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 :-
1. Arranging and combining the parts of pumps and their hydraulic motor
apparatus in the improved manner substantially as hereinbefore described and as
shown in the accompanying drawings.
2. In pumping apparatus worked by hydraulic motors, connecting the motor
plungers or pistons to cranks on a rotating shaft which shaft works a single
distribution valve for all the motor cylinders substantially as hereinbefore
described.
Dated this Twenty-sixth day of February 1894.
EDMUND HUNT,
Applicant's Agent.