Improvements in and applicable to Pumps, more Particularly Intended for Shaft Sinking Purposes.
Year: 1892

page_text: Date of Application, 7th June, 1892
Complete Secification Left, 3rd Mar., 1893-Accepted, 29th Apr., 1893
PROVISIONAL SPECIFICATION.
Improvements in and applicable to Pumps, more Particularly
Intended for Shaft Sinking Purposes.
We, FRANK PEARN, SINCLAIR PEARN and THOMAS ADDYMAN of the firm
Frank Pearn & Co., of Gorton, Manchester, in the County of Lancaster, Engineers,
do hereby declare the nature of the said invention to be as follows:-
Our invention relates to duplex steam pumps more particularly intended for
shaft sinking purposes, and consists firstly in an improved combination and
arrangement of the parts. There are two steam cylinders united together.
The slide valves for one pump are operated by the other pump.
The piston of each steam cylinder is connected to two piston rods which pass
through glands in the cylinder and to which a small fixed hollow ram is secured,
the outlet from which is formed in passages in the hollow cover for the ends of the
steam cylinders.
On the small stationary ram there is another larger hollow ram with suitable
glands to pack it and this ram is actuated by connection with the piston rods from
the piston of the steam cylinder.
The moving ram works in a fixed ram cylinder or barrel which contains the inlet
water valve for the pump.
The ram cylinders or barrels for the reciprocating rams are connected by bolt
stays with the castings for the steam cylinders.
The steam cylinder valves and valve mechanism piston fixed and moving rams
and ram cylinder are the same for each pump and are bolted together.
The same water supply branch conveys water to the inlet valves of both pumps,
and the water passes from the same outlet from both pumps.
Our invention secondly relates to and consists in the application of the inlet
valve to the end of the hollow reciprocating ram.
We prefer to make it by a central bolt or stem one end of which is secured in a
cross bar in the axis of the ram, upon the stem a disc, faced with india-rubber or
other suitable material slides, and it shuts against a grid valve seating formed on a
flanged part, that has also a grid surface formed or attached to it to keep back
dirt. This flanged part valve seating and grid are screwed upon the end of the
stem or bolt so that the flanged part will make a joint with the end of the moving
ram.
When the reciprocating ram descends, part of the water in the barrel below it
(the inlet valve being then closed) passes through the valve attached to the lower
end of the moving ram into its hollow, and up the hollow of the small stationary
ram, and out at the delivery junction.
When the moving ram ascends, the foot or inlet valve opens and allows water
to enter the barrel for the moving ram, and part of the water above the valve, at
the lower end of the moving ram, which valve is then closed, also passes up the
small stationary hollow ram to the delivery junction and so on, each pump acting
alternately.
Dated this Sixth day of June 1892.
PETER J. LIVSEY,
Agent.

page_text: COMPLETE SPECIFICATION.
Improvements in and applicable to Pumps, more Particularly
Intended for Shaft Sinking Purposes.
We, FRANK PEARN, SINCLAIR PEARN, and THOMAS ADDYMAN of the firm
Frank Pearn & Co. of Gorton, Manchester in the County of Lancaster, Engineers,
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 :-
Our invention relates to duplex steam pumps more particularly intended for
shaft sinking purposes, and consists firstly in an improved combination and
arrangement of the parts. There are two steam cylinders united together. The
slide valves for one pump are operated by the other pump. The piston of each
steam cylinder is connected to two piston rods which pass through glands in the
cylinder and to which a small fixed hollow ram is secured, the outlet from which is
formed in passages in the hollow cover for the ends of the steam cylinders.
On the small stationary ram there is another larger hollow ram with suitable
glands to pack it and this ram is actuated by connection with the piston rods from
the piston of the steam cylinder.
The moving ram works in a fixed ram cylinder or barrel which contains the inlet
water valve for the pump.
The ram cylinders or barrels for the reciprocating rams are connected by bolt
stays with the castings for the steam cylinders.
The steam cylinder valves and valve mechanism piston fixed and moving rams
and ram cylinder are the same for each pump and are bolted together.
The same water supply branch conveys water to the inlet valves of both pumps,
and the water passes from the same outlet from both pumps.
Our invention secondly relates to and consists in the application of the inlet
valve to the end of the hollow reciprocating ram.
We prefer to make it by a central bolt or stem one end of which is secured in a
cross bar in the axis of the ram, upon the stem a disc faced with indiarubber or
other suitable material slides, and it shuts against a grid valve seating formed on a
flanged part, that has also a grid surface formed or attached to it to keep back
dirt. This flanged part valve seating and grid are screwed upon the end of the
stem or bolt so that the flanged part will make a joint with the end of the moving
ram.
When the reciprocating ram descends, part of the water in the barrel below it
(the inlet valve being then closed), passes through the valve attached to the lower
end of the moving ram into its hollow, and up the hollow of the small stationary
ram, and out at the delivery junction.
When the moving ram ascends, the foot or inlet valve opens and allows water
to enter the barrel for the moving ram, and part of the water above the valve, at
the lower end of the moving ram, which valve is then closed, also passes up the
small stationary hollow ram to the delivery junction and so on, each pump acting
alternately.
Fig. 1, is a side sectional elevation of the duplex steam pumps the parts for one
side or for one pump being in section.
Fig. 2, is a side elevation.
Fig. 3, is a top plan view and
Fig. 4, is a part of the moving ram and the valve secured to its lower end shewn
in section on an enlarged scale.
a is a hollow plate casting which serves for both pumps and the hollow of this
plate receives all the fluid from the pump and has an outlet at a', Fig. 3 to
which the delivery pipe is connected by flanges and bolts or screws.

page_text: The hollow plate a is connected by stay rods b, which form long bolts, with
another part forming the cylinder for the moving ram hereinafter referred to.
On the upper side of the hollow plate castings a, both steam cylinders d rest
and they are secured to it by screw bolts. There is a lid d to each steam
cylinder d secured by bolts to its upper end. Each steam cylinder d has a valve-
box d for an ordinary slide valve in it, worked by a rod d³, passing through a
stuffing box. (see Figs. 1 and 2) the lower end of which rod is jointed. to a.
link d and which link at its lower end is jointed to an arm & on a shaft d',
in a bearings in a bracket a secured to the plate a on the other end of the
shaft da lever d' is secured, that has a slot in its end for a bowl on a.
stud secured in a projection * from the moving ram e hereinafter referred
This above described arrangement works the valve of one steam cylinder
for one pump from the rame of the other pump, the shaft dex, and the arm d³×‚.
being used for working the valve for the other steam cylinder from the ram e
of the other pump.
to.
".
The piston d of each steam cylinder has two piston rods each passing through
a gland in the hollow plate a and being secured by a cottar in a projection from
the upper end of the moving ram e which fits and slides upon a small ram,.
the upper end of which is secured by a flange and screws or bolts to the.
underside of the plate a the hollow in which communicates with the interior
of the ram f.
The upper end of the moving ram e has a packing gland e¹ in it for the small
stationary ram fto pass through. The moving rame works through a packing-
gland g in a barrel y having projections upon it for the stay bolts b, and
also for flanges, by which one half or one pump is secured to the other half or
other pump.
At the lower end of the barrel g for each working ram e there is a lifting inlet.
valve g' to which access is given at one side of the barrel g through an opening closed
by a cover plate (see Figs. 1 and 2).
The lower end of the moving ram e has a cross bar e' (see Fig. 4), to which a.
stud is secured. The head of the stud passes through a slot or hole in the bar e³
and the neck of the stud is slided into a slot therein. This stud e has a disc e
faced with rubber or like elastic material sliding up and down it, and upon it there
is a cylindrical part e having a grid eat its upper face and one e' at its lower end
or face the upper grid is for the rubber face of the valve et.
This cylindrical part e has a bevelled flange that comes against a corresponding
bevel on the lower end of the ram e, when the nut on the end of the stud e³ is.
screwed up tight, there being a packing ring of rubber or leather between the
bevelled surfaces.
The cross bar e leaves a passage on one or both sides of it for liquid to pass up.
the hollow of the rams e and f. There is one branch pipe h, connected by flanges.
and bolts or screws to the ends of each barrel for the moving rams and this branch
pipe h has two junctions, one below for the suction pipe another above for a
small air vessel or chamber h³, so that both ram barrels 9 are supplied from the
same suction pipe.
There is one branch pipe i for steam connected by flanges and bolts or screws.
with the branch from each steam slide valve box d and this branch pipe has a
junction for the steam supply pipe; d is the branch from each valve box for
exhaust steam.
When the pumps are used for pit sinking and other similar purposes, they are-
suspended by chains or other connections passed through the holes (see Fig. 3).
Having now particularly described and ascertained the nature of our said inven-.
ion and in what manner the same is to be performed we declare that what we
claim is
1. The combination of double steam pumps having one stationary and one:

page_text: moving ram for each pump substantially as herein before described and illustrated
by the drawings.
2.. The combination of a valve within the lower end of the moving ram (e)
substantially as and for the purpose herein before described and illustrated by the
drawings.
1000
PETER J. LIVSEY,
Agent.