IMPROVEMENTS IN STEAM PUMPING APPARATUS to be as follows:-
Year: 1884

page_text: I, WILLIAM ANDERSON of N° 3 Whitehall Place in the City of Westminster,
do hereby declare the nature of my Invention for "IMPROVEMENTS IN STEAM
PUMPING APPARATUS to be as follows:-
"
This Invention has for its object improvements in steam pumping apparatus.
My improved steam pumping apparatus consists of two steam cylinders and an
air pump.
One of the steam cylinders is a high pressure and this first receives the steam
and the other is a low pressure and into this the steam is passed after it has
performed its work in the high pressure cylinder.
The high pressure cylinder and air pump cylinder are set diametrically opposite
to the low pressure cylinder so that the pistons and moving parts may balance one
against the other. The main shaft driven by the pistons of the two steam
cylinders is vertical and suspended by its upper end from a support above the
cranks. Below the cranks the main shaft carries the wheel or revolving part of a
centrifugal pump. Or in some cases the main shaft may be horizontal and the
steam cylinders may both receive steam direct from the boiler and the air pump
may be dispensed with.
Dated this 21st dore of Tan 100
CARPMAEL & Co.,
Agents for the Applicant.

page_text: Figures 1 and 1* show a vertical section of steam pumping apparatus arranged
and combined in accordance with my Invention. Figure 2 is an end elevation and
Figure 3 is a plan of the same.
The engine is of the compound condensing type with one high pressure and one
low pressure cylinder and is arranged as follows:
A pair of strong cast iron main girders A. A are connected near their centre by
the horizontal cross girders B. B which are fitted with the crank shaft bearing
brasses and caps &
.
On one side of the crank shaft and bolted between the main girders is the high
pressure cylinder C which may or may not be fitted with steam jackets and may
be fitted with double slides or a single slide..
The slides are worked by means of eccentrics keyed on to crank shaft above
the upper cross girder B. The high pressure piston rod is fitted with the usual
guide block and connecting rod to crank shaft and the piston rod is prolonged
through the piston to form a coupling for the air pump rod which is worked
through the back cover of cylinder-the air pump is bolted to the ends of the
main girders A. A. behind the high pressure cylinder, it is of the borizontal type
with packed piston and india rubber or other kind of section and delivery valves.
The low pressure cylinder D is bolted to the opposite ends of main girders to air
pump so that the crank shaft is between the high and low pressure cylinders; the
low pressure cylinder may or may not be fitted with steam jackets, and single or
double slides.
The crank shaft is made with a double throw so that the high pressure crank
pin is opposite to the low pressure crank pin and its horizontal centre line
sufficiently above the low pressure pin to allow of a strong crank web between
them by this arrangement the centre of high pressure cylinder is kept as little
above the centre of low pressure cylinder as possible and the strains are nearly
balanced.

page_text: The crank shaft revolves in the bearings in the cross girders and is suspended
by an onion or thrust collar having supported on a bracket E bolted to the top
cross girder, just under the lower cross girder a fly wheel F is fitted on crank shaft
and below it a coupling connects to centrifugal pump spindle N-which at its
lower end carries the wheel of the rotary pump O. P is the pump case ascending
into the well or to the source, the entrance for the water is at P' and the
outlet at P
Thus the entire weight of the pump and shafting as well as the crank shaft of
the engine hangs suspended from the onion bearing or thrust collar at the upper
end of the crank shaft.
The steam from boiler enters the high pressure cylinder and passes from thence
through the reservoir pipe G, which may be steam jacketted or fitted with steam
heating pipes, to the low pressure valve casing and after passing through the low
pressure cylinder is exhausted into the condenser H which is made in the form of
a pipe placed at an angle and connected at its lower end to the suction chamber of
the air pump towards its upper end is placed the injection cock I which admits
the water for condensation.
Both the reservoir pipe and condenser are fitted with suitable expansion pieces.
The overflow pipe from air pump is fitted to the bottom of box, and is led into any
Buitable placed required.
Feed pumps are fitted when required and draw from hotwell, they may be
worked direct from either high or low pressure pistons, or rods, or by an eccentric
on crank shaft.
The weight of the moving parts on each throw of the crank shaft should be
made as nearly equal as possible and then the momentum will be the same and
acting in opposite directions the action of the steam will also take place in opposite
directions and can be made nearly equal by adjusting the proportion of the
cylinders and by that means the forces of momentum and action of the two
cylinders balance and neutralize each other, causing the engine to work very
smoothly and reducing friction of crank shaft to a minimum.
The arrangement above described is applicable to a pair of ordinary non-
condensing or condensing engines, and it may be convenient in the case of large
engines to arrange one high pressure cylinder opposite to a pair of low pressure
cylinders, so as to do away with the turning moment on the crank shaft.
Having now particularly described and ascertained the nature of my said
Invention and in what manner the same is to be performed I declare that what
I claim is
First. Steam pumping apparatus in which the bigh and low pressure cylinders
of a compound engine are placed opposite to each other with their moving parts to
balance and driving a vertical cranked axis between them, the said cranked axis
being suspended together with the pump wheel which it carries at its lower end
from an onion or thrust bearing substantially as described.
Second. Steam pumping apparatus as above but with two single engines similarly
combined.