Improvements in Pumping Engines.
Year: 1893

page_text: Date of Application, 22nd Dec., 1893
Complete Specification Left, 14th Sent.; 1894-Accepted, 8th Dec., 1894
PROVISIONAL SPECIFICATION.
Improvements in Pumping Engines.
We, TAYLOR AND CHALLEN LIMITED, and STEPHEN WILLIAM CHALLEN,
both of Derwent Foundry, Constitution Hill, in the City of Birmingham,
Engineers, do hereby declare the nature of this invention to be as follows:-
―
This invention has reference to the manner in which we construct and arrange
steam pumping engines for supplying water under pressure for hydraulic machinery
or other purposes, the objects of our invention being to construct a pumping engine
with all its parts valves and fittings readily accessible and to dispense with toothed
or other gearing for reducing the stroke of the pumps below the stroke of the
pistons in the steam cylinders.
In carrying our invention into effect when constructing a pumping engine for
supplying water under pressure for feeding a hydraulic main or for feeding an
accumulator and other hydraulic machinery, we arrange a pair of high and low
pressure steam cylinders of tandem type upon a common bed plate. On each side
of the centre line of the engine we thus place a high and a low pressure cylinder
four cylinders in all, leaving an open space between the steam valve chests to
permit of the attendant passing freely between them. Upon the opposite end of
the bed plate to that upon which we secure the steam cylinders, we mount a crank
shaft in suitable bearings which we arrange upon the bed plate in a position to
permit of a flywheel or crank overhanging each bearing on the outside of the bed
of the engine. We preferably employ flywheels or disc wheels with gudgeons or
pins provided upon them for receiving a connecting rod of any well known kind,
the pins of course being arranged upon the discs or wheels to suit the travel or
stroke of the pistons, and the wheels being balanced against the weight of
the same.
The inner portion of the crank shaft or main shaft we form with a plain central
crank having a throw less than the throw of the crank pins upon the outer ends of
the shaft; and on to this central reduced throw crank we connect a connecting rod
having a sling or loop end for embracing a central sliding block which we place
between a pair of single acting pump cylinders mounted upon the bed plate between
the framing forming the guides for the slippers of the steam cylinder or piston
crossheads.
The water pump barrels into which the plungers work operate with a slower
speed than that of the steam pistons, we provide with suitable flanges for bolting
down to lugs or facing blocks or strips arranged upon the bed plate of the engine,
and we cause the pump plungers to connect to a central crosshead or block which
preferably slides to and fro upon guide bars carried upon the water cylinders or
pump barrels. The inlet and outlet to each pump barrel we make to serve both
for delivery and for suction for a length or distance of pipe between the two
independent valve boxes or suction and delivery valve chambers. These valve
chambers with their selfcontained valves we mount above the pump barrels, and
we construct the valves and seatings in a manner to permit of each valve being
readily examined or withdrawn without disturbing any of the flange connections of
the suction or delivery mains and without dismantling any other portion of the engine.
We arrange one common delivery chamber midway between each delivery valve box

page_text: of the single acting ends of the pumps, and we cause the water after passing through
its own particular rising main and delivery valve to then travel through the enlarged
common or supply main chamber, and thence forward to the hydraulic accumulator
or other main. We mount a shock or relief valve upon this central supply chamber and
we sometimes lead off the water thus escaping when excess pressure arises, through
or into the ordinary suction main.
We employ one or more valves in each valve box as may be required to suit the
size of pipe which is supplying the water, the valves being of any well known kind
employed for like purposes.
We prefer to employ high and low pressure steam cylinders with their eccentrics
and valve rods all arranged inside the engine framework, although when so desired
we construct engines with single cylinders instead of compound, to work in
connection with our improved combination of valve and pump system of construction
and arrangement as hereinbefore described.
We employ any type of slide valves for our steam cylinders and any ordinary
form of connecting rods and other ordinary parts, when constructing pumping
engines for any particular requirement in which our improved compact and readily
inspected system of mounting the pumps, valves and the driving crank without
gearing as herein before described is to be adopted.
Dated this 21st day of December 1893.
MARKS & CLERK,
18, Southampton Buildings, London, W.C., Agents for the Applicants.
COME LETE SPECIFICATION.
Improvements in Pumping Engines.
We, TAYLOR AND CHALLEN LIMITED, and STEPHEN WILLIAM CHALLEN,
both of Derwent Foundry, Constitution Hill, in the City of Birmingham,
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 :-
This invention has reference to the manner in which we construct and arrange
steam pumping engines for supplying water under pressure for hydraulic machinery
or other purposes, the objects of our invention being to construct a pumping
engine with all its parts, valves, and fittings readily accessible and to dispense
with toothed or other gearing for reducing the stroke of the pumps below the stroke
of the pistons in the steam cylinders.
In the accompanying sheet of explanatory drawings--
Figure 1 is a front elevation of our pumping engine, and Figure 2 is a plan of
the same.
In carrying our invention into effect when constructing a pumping engine for
supplying water under pressure for feeding a hydraulic main or for feeding an accu-
mulator and other hydraulic machinery, we arrange a pair of high and low pressure
steam cylinders AA BB' of tandem type upon a common bed plate C. On each side of
the centre line of the engine we thus place a high and a low pressure cylinder A A'BB'
four cylinders in all, leaving an open space between the steam valve chests D D¹ to
permit of the attendant passing freely between them. Upon the opposite end of
the bed plate to that upon which we secure the steam cylinders, we mount a crank
shaft E in suitable bearings e e' which we arrange upon the bed plate in a position
to permit of a flywheel F F or crank overhanging each bearing on the outside of
the bed of the engine. We preferably employ flywheels or disc wheels with
gudgeons or pins G G' provided upon them for receiving a connecting rod H of
any well known kind, the pins of course being arranged upon the discs or wheels

page_text: to suit the travel or stroke of the pistons, and the wheels being balanced against
the weight of the same.
The inner portion of the crank shaft or main shaft E we form with a plain central
crank E' having a throw less than the throw of the crank or gudgeon pins G upon
the outer ends of the shaft; and on to this central reduced throw crank E' we
connect a connecting rod J having a sling or loop end for embracing a central
sliding block K which we place between a pair of single acting pump cylinders L L'
mounted upon the bed plate between the framing forming the guides M M¹ for the
slippers of the steam cylinder or piston crossheads. The water pump barrels L L'
into which the plungers work with a slower speed than that of the steam pistons,
we provide with suitable flanges for bolting down to lugs or facing blocks or
strips arranged upon the bed plate of the engine, and we cause the pump
plungers N N to connect to a central crosshead or block K which preferably
slides to and fro upon guide bars carried upon the water cylinders or pump barrels.
The inlet and outlet to each pump barrel we make to serve both for delivery and
for suction for a length or distance of pipe 0 0¹ between the two independent
valve boxes or suction and delivery valve chambers P P¹. These valve
chambers P P with their self contained valves we mount above the pump barrels,
and we construct the valves and seatings in a manner to permit of each valve being
readily examined or withdrawn without disturbing any of the flange con-
nections O'O'O' of the suction or delivery mains and without dismantling any
other portion of the engine. We arrange one common suction chamber R midway
between each suction valve box of the single acting ends of the pumps, and we cause
the water after passing through its own particular rising main or O¹ and delivery
valves P¹ to then travel through the enlarged common or delivery main branch S,
and thence forward to the hydraulic accumulator or other main.
We mount a shock or relief valve upon this central supply chamber and we
sometimes lead off the water thus escaping when excess pressure arises, through
or into the ordinary suction main R'.
We employ one or more valves in each valve box as may be required to suit the
size of pipe which is supplying the water, the valves being of any well known kind
employed for like purposes.
We prefer to employ high and low pressure steam cylinders with their eccentrics a
and valve rods d all arranged inside the engine framework, although when so
desired we construct engines with single cylinders instead of compound, to work in
connection with our improved combination of valve and pump system of
construction and arrangement as hereinbefore described.
We employ any type of slide valves for our steam cylinders and any ordinary
form of connecting rods and other ordinary parts, when constructing pumping
engines for any particular requirement in which our improved compact and readily
inspected system of mounting the pumps, valves and the driving crank without
gearing as herein before described is to be adopted.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is :-
1. In a steam power hydraulic pumping engine the arrangement of a pair of
pumps midway between the steam piston connecting rods, having the pump
plungers worked by a connecting rod attached to a crank bearing formed upon the
main or flywheel shaft and having the suction and delivery pipes and valves
arranged in the manner substantially as and for the purposes hereinbefore described
and as illustrated in the accompanying drawings.
2. In a steam power hydraulic pumping engine the combination and arrangement
of a pair of independent suction and delivery pipes such as O O' with independent
delivery valves and a common delivery main having a branch connection to each
delivery valve box, all being arranged above the pump barrels in a manner to

page_text: admit of ready access to the valves without dismantling any other part of the
pumps or engine, substantially as hereinbefore described and as illustrated in thé
accompanying drawings.
Dated this 14th day of September 1894.
MARKS & CLERK,
18, Southampton Buildings, London, W.C., and
13, Temple Street, Birmingham, Agents for the Applicants.