IMPROVEMENTS IN COMPOUND STEAM PUMPING ENGINES
Year: 1880

page_text: LETTERS PATENT; to Edward Bayzand Ellington, of the Chester Hydraulic :
Engineering Works, Chester, in the County of Chester, for an Invention of
"IMPROVEMENTS IN COMPOUND STEAM PUMPING ENGINES,”.
PROVISIONAL SPECIFICATION left by the said Edward Bayzand Ellington
at the Office of the Commissioners of Patents on the 16th June 1880.
EDWARD BAYZAND ELLINGTON, of the Chester Hydraulic Engineering Works,
Chester, in the County of Chester. "IMPROVEMENTS IN COMPOUND STEAM
PUMPING ENGINES."
"
My Invention relates to pumping engines, such as are employed for forcing
water under pressure into an accumulator or reservoir, the object which I have in
view being a compact and simplo arrangement of the working parts, and equilization"
of their 'action. For this purpose I arrange three single acting plunger pumps side.
by side, and in line with these respectively three steam cylinders, the middlo
cylinder being a high pressure cylinder, and the two side cylinders being low
pressure cylinders worked with the exhaust steam of the high pressure cylinder.
The piston rod of each of the three cylinders is connected directly to the plunger of
the pump which is in line with it. It is also connected by a connecting rod to a
crank on a three-throw crank shaft carrying a fly-wheel. I provide for each low
pressure cylinder, besides its supply passago from the high pressure exhaust, a
passage for steam from the main steam pipe, this passage being furnished with a
valve, so that when it is required to admit steam from the boiler directly to the
low pressure cylinders, the valve can be more or less opened. When the pumping
engine is used for charging an accumulator, I connect the valvo gear of the engine
to a moving part of the accumulator, so that when the accumulator is fully charged
the engine is brought to rest. I also connect the valve above mentioned in the
supply passage of the low pressure cylinders to a moving part of the accumulator,
so that if the engine has been brought to rest by the action of the accumulator, the
subsequent descent of the ram of the accumulator causes this valve to open, and so
causes the engine to be again started. I also connect this valve to a piston working
in a cylinder which is in communication with the pumps by pipes furnished with
check valves, so that when the engine has been started as above described, the
pressure produced by the working of the pumps acting on this piston closes.the
valve, and so cuts off direct supply to the low pressure cylinders, whereupon the
_engine_goes_on_working as a compound engine.
-

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Edward Bayzand Ellington in the Great Seal Patent Office on the
15th December 1880.
EDWARD BAYZAND ELLINGTON; of the Chester Hydraulic Engineering Works,
Chester, in the County of Chester. "IMPROVEMENTS IN COMPOUND STEAM
PUMPING ENGINES."
My Invention relates to pumping engines, such as are employed for forcing
water under pressure into an accumulator or reservoir, the object which I have in
view being a compact and simple arrangement of the working parts, and equilization
of their action. For this purpose I arrange three single acting plunger puipps side
by side, and in line with these respectively three steam cylinders, the middle
cylinder being a high pressure cylinder, and the two sido cylinders being low
pressure cylinders worked with the exhaust steam of the high pressure cylinder.
The piston rod of each of the three cylinders is connected directly to the plunger
of the pump which is in line with it. It is also connected by a connecting rod to
a crank on a three-throw crank shaft carrying a flywheel. I provide for cach low
pressure cylinder, besides its supply passage from the high pressure exhaust, a
passage for steam from the main steam pipe, this passage being furnished with a
valve, so that when it is required to admit steam from the boiler directly to the low
pressure cylinders, the valve can be more or less opened. When the pumping
engine is used for charging an accumulator, I connect the valve gear of the engine
to a moving part of the accumulator, so that when the accumulator is fully charged,
the engine is brought to rest. I also connect the valve above mentioned in the
supply passage of the low pressure cylinders to a moving part of the accumulator,
so that if the engine has been brought to rest by the action of the accumulator, the
subsequent descent of the ram of the accumulator causes this valve to open, and so
causes the engine to be again started. I also connect this valve to a piston working
in a cylinder which is in communication with the pumps by pipes furnished with
check valves, so that when the engine has been started as above described, the
pressure produced by the working of the pumps acting on this piston closes the
valve, and so cuts off direct supply to the low pressure cylinders, whereupon the
alancina

page_text: chain g passing over a pulley to a counterweight suspended over the accumulator,
so that when the accumulator rises beyond a certain point raising this counter-
weight the lever G descends, and when the accumulator descends, the counterweight
also descending, causes the lever G to rise. To the lever F is linked a slide K
which governs a port opening to the branch pipes a leading to the low pressure
cylinders. At the side of the water cylinder E is a piston slide H which governs
communication between the cylinder E and either of two pipes e¹ and e³, the one e'
being a pressure pipe communicating with the discharge of the pumps P, and the
other e being a discharge pipe for relief of pressure. On the rod h of the slide H
is an adjustable stop h¹ under the lever G and a handlo h³. This apparatus as
shown in Fig. 3 is in the condition for regular working, the port to s being closed,
and the engine working as a compound engine to pump up the accumulator. As
the accumulator reaches the upper extremity of its stroke, raising the counterweight
attached to g, the lever G descends, drawing down the piston slide H, and so
allowing escape of water from the cylinder E. When after the engine has been
stopped the accumulator descends, the counterweight straining the chain g raises
the lever G, and the pressure in E having been relieved the lover F is moved,
shifting the slide K so as to admit steam from the main pipe S to the. branches &
leading to the low pressure cylinders, and thus the engine is automatically started.
When the engine and pumps have been started, the pressure of the pump discharge
communicated by the pipe e' acts on the annular area of the piston slide H and
shifts it upwards, so as to admit the water under pressure to the cylinder E, forcing
its plunger downwards, and thereby moving the lover F and slide K so as to close
the port a leading to the low pressure cylinders. The engine is thus after having
been started with full pressure in all its cylinders automatically restored to the
condition of working as a compound engine. Sometimes the engine may bo
purposely stopped when the accumulator is not fully up. In order to start it by
Land the valve rod h is pulled down by the handle h², so as to allow escape of
water from the cylinder E, whereupon the counterweight straining the chain g
raises the levers G and F and shifts the slide K, so as to cause the engine to start
with full pressure, as above explained in reference to its being automatically
started. The speed of the engine may be regulated by a governor and Correy gear,
and the same gear may be connected to the accumulator, as shewn in Figs. 1 and 2,
so that the cut off is regulated by the rise of the accumulator.
Having thus described the nature of my Invention, and in what manner the
same is to be performed, I claim in respect of compound steam pumping engines,—
First. The arrangement of a high pressure cylinder with a low pressure cylinder
on each side of it, the piston of each cylinder working directly one of three pumps,
and being connected to one of three cranks on one shaft, substantially as herein.
described.
.
Second. Providing for the low pressure cylinders a supply of high pressure steam
governed by an automatic valve apparatus, substantially as horcin described with
reference to Fig. 3 of the accompanying Drawings.
•
In witness whereof, I, the said Edward Bayzand Ellington, have hereunto
sot my hand and seal, this Fourteenth day of December, in the year of our
Lord One thousand eight hundred and eighty.
E. B. ELLINGTON. (L.B.)