Improvements in Boiler Feed and other Pumps.
Year: 1898

page_text: Improvements in Boiler Feed and other Pumps.
I, JOHN PERCY HALL, of "Carville," Lawrie Park Road, Sydenham, in the
County of Kent, Engineer, do hereby declare the nature of this invention to be
as follows:-
My invention relates to steam engine boiler feed (main and auxiliary) and
other pumps, and its object is to improve upon the construction of these said
pumps where such pumps are required to work intermittingly in their action
and duty and where they may be mechanically controlled, and so constructed
as to ensure positive action at will and when required and when thus being so
mechanically controlled-and at the same time to be able to use steam engine
pumps so arranged as to work the steam cylinders expansively and economically.
In the case of a double cylinder high pressure expansion engine pump
with two pumps and fitted with double throw crank shaft and appliances for
working same I construct this engine with two pumps, separate castings or
cast together as may be required. One of these pumps casings I construct with
a connecting pipe of small dimensions or a connecting passage cast on the pump
casing-connecting the discharge side of the pump, with the suction or inlet side
of the same pump, and thus liberating or relieving the pressure from this pump
and making it free to move without doing any duty beyond the effort of moving
the contents of the pump from the discharge side to the suction side, thus putting
the pump bucket in equilibrium.
(This may also be effected by a small hole or passage constructed in the pump
bucket-thus making a connection between the suction and discharge ends.) by
thus so doing the power of the two cylinders or the power of one of either of the
two steam cylinders to effect action on the loaded pump is free to act-thus the
effect of the steam in one or both cylinders will always be free to move the piston
of this said cylinder and so do duty on the loaded pump-and may be controlled
by mechanical appliances.
I fit when required a controlling gear as previously referred to-to regulate the
supply of steam to the cylinders--preferably the appliances may be a float sus-
pended in a tank or vessel which float will be free to rise or fall subject to the
rise or fall of the water level of this said tank or vessel-and which will
be connected to the steam supply pipe or cock or valve as may be required—
such as in arrangement commonly used on board ship and which also is used on
land installations.
By this arrangement the action of the pump is assured and positive without
materially effecting the efficiency of the pumps.

page_text: The above refers to an ordinary high pressure expansion engine but it is
also equally applicable to an engine constructed on the compound principle
also triple or more expansive engines.
In the case of the compound or more expansive engines, I construct and fit
a valve or other appliance so as to make a connection between the steam pipe or
the steam chest of the high pressure cylinder to the steam pipe or the steam chest
of the secondry or low pressure cylinders-thus providing for a supply of steam
to both or all cylinders. This will be done preferably by a reducing valve and
which will preferably act automatically, admitting steam to the secondry cylin-
ders of a lower pressure than that used by the first or high pressure cylinder-
so that always and at any time either both or all cylinders may be so worked
separately or conjointly to effect duty-This valve to be so arranged as to supply
at all times a constant minimum pressure of steam to the lower pressure cylinders.
By these devices I obtain greater economy in the use of steam as applied to
boiler feed and other pumps and positive action of the pumps at all times
when mechanically and automatically controlled is assured.
I also obtain full stroke action of pumps at all times.
These devices are applicable to any form or design of steam feed, and other
pumps either of the direct principle, duplex, or crank shaft pumps of any form
or design.
COMPLETE SPECIFICATION.
Improvements in Boiler Feed and other Pumps.
I, JOHN PERCY HALL, of Carville," Lawrie Park Road, Sydenham, in the
County of Kent, 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 :-
1
My invention relates to steam engine boiler feed (main and auxiliary) and
other pumps, and its object is to improve upon the construction of these said
pumps where such pumps are required to work intermittingly in their action
and duty and where they may be mechanically controlled, and so constructed
as to ensure positive action at will, and when required, and when thus being so
mechanically controlled-and at the same time to be able to use steam engine
pumps so arranged as to work the steam cylinders expansively and economically.
In the case of a double cylinder high pressure expansive engine pump,
with two pumps and fitted with crank shaft and appliances for working same
in the usual way---I construct this engine with two pumps separate castings,
or cast together as may be required.
One of these pump casings I construct with a connecting pipe of small dimen-
sions as shown in Fig. 1 For a connecting passage cast on the pump casing,
thus making a connection between the two ends of the pump-and thus liberating
or relieving the pressure from this pump-and, making it free to move--without
doing any duty beyond the effort of moving the contents of the pump from the
discharge side, to the opposite side of the bucket, or plunger C, thus putting the
pump bucket or plunger in equilibrium.
And I fit in this connecting passage F, a cock or valve marked G, and I con-
nect this cock or valve to a float in a tank or vessel by means of a lever and rod

page_text: lettered respectively H & I, and which float is free to rise and fall due to the
rise and fall of the water in this tank, and the rise and fall of this float actuates
or works the cock or valve and so puts the pump plunger C in equilibrium.
I fit when required a controlling gear as previously referred to-to regulate the
supply of steam to the cylinders-preferably the appliance may be a float sus-
pended in a tank or vessel which float will be free to rise or fall subject to the
rise or fall of the water level of this tank or vessel-and which may
be connected to the steam supply pipe or cock or valve as may be required—
uch as in arrangement commonly used on board ship and which also is used on
land installations.
This tank or vessel may be also used to contain the float previously referred to,
to work the cock or valve G connected by the lever H, and rod I, or other tank
may be used if required.
In the case of a pump with the steam cut off before the end of the stroke say
in the case of a two cylinder high pressure engine of Admiralty or similar pattern
with crank shaft, this pump is stopped; the water again rises in the tank; and
opens the valve for steam to the cylinder; but steam is only admitted to one
cylinder the other piston being past the point of "cut off" therefore this cylinder
has the two pumps loaded to work, but it not being sufficiently powerful to do
both, stands; my devices then come into play and relieve the pressure on one
pump, thus making it possible for one cylinder to work through and move the
loaded pump, and move on until the other cylinder gets steam; the two together
then get into motion at normal speed thus making the steam cylinders with early
steam cut off, possible to work intermittingly and which may be controlled in
their steam supply.
This also refers to a compound engine with two cylinders and one pump (tandem
wise) or to any other form of steam worked pump, working intermittingly and
automatically.
By these devices I obtain greater economy in the use of steam as applied to
boiler feed and other pumps, and positive action of the pump or pumps at all times,
even when being mechanically controlled.
These devices are applicable to any form or design of steam feed and other
pumps, either of the direct acting principal, duplex, or crank shaft pumps.
In order that my said invention may be fully understood and readily carried into
effect, I will now proceed to describe the drawings annexed.
Fig. I is a sectional drawing of the pump in accordance with my invention.
A is the pump chamber.
B is the brass liner of the chamber.
Cis the plunger.
D) is the discharge branch.
E is the suction branch.
Fis the connecting pipe making a passage between the top part and the bottom
of the pump.
G is the cock or valve fitted between the two ends of the pump-which may
be worked by lever and rod-connecting same to the float in the tank in such a
manner as may be worked and controlled by the rise and fall of water in this
said tank.
H is the arm or lever connected to the cock or valve G.
I is the rod connecting the cock or valve to the float in the tank.
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:-
A steam worked pump or pumps substantially as described and illustrated by
the accompanying drawing (Fig. 1) consisting of a pump having a connecting pipe
5 or passage between the two ends of the said pump, and in this pipe or passage

page_text: is fitted a cock or valve (Fig. I G) which may be worked by gear from a float
in a tank and actuated by the rise or fall of water or other liquid in this tank.
And I claim the above in connection with steam cylinders worked by steam
expansively, which steam cylinders may be worked intermittingly the steam
supply of which may be controlled mechanically, from the rise and fall of water
or other liquid in a tank, supporting a float, and this float being connected to
the valve of the steam supply.
T