An Improved Boiler Feed Pump for Steam Engines.
Year: 1891

page_text: Date of Application, 6th Feb. 1891
Complete Specification Left, 24th Oct., 1891-Accented
200
PROVISIONAL SPECIFICATION.
""" 1037
An Improved Boiler Feed Pump for Steam Engines.
We, EUSTACE WIGZELL, and JOSEPH POLLIT, Engineers, of Bank Foundry,
Sowerby Bridge, in the County of York do hereby declare the nature of this
invention to be as follows:-
Our improved feed pump we make in the following manner.
We place a cylinder inside a tank or reservoir, the bottom end of this cylinder
we pass through the tank or reservoir or otherwise to form the discharge pipe,
where we place a feed valve; on the discharge pipe and over the feed valve, we
place an air vessel. The cylinder inside the tank or reservoir is immersed in water,
and inside it we put a piston or plunger, connected by a rod to the most convenient
suitable part of an engine. Round the cylinder we have slotted or circular
openings which come below the piston when the latter is at the top of its stroke,
enabling the water to run into the cylinder. When the piston is on its downward
stroke it covers the openings and forces the water against the valve, lifting it
against the pressure, and on the return stroke the valve closes, the piston again
passes the dotted openings until it is above them, and the cylinder again fills through
the openings ready for forcing out.
plunger it passes back into the receiver or tank.
Should there be any leakage in the piston or
This arrangement does away with the necessity for foot valves and stuffing boxes
which are always more or less a source of trouble.
Dated this 5th day of February 1891.
EUSTACE WIGZELL.
JOSEPH POLLIT.
COMPLETE SPECIFICATION.
An Improved Boiler Feed Pump for Steam Engines.
We, EUSTACE WIGZELL and JOSEPH POLLIT Engineers, of Bank Foundry,
Sowerby Bridge, in the County of York 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 improved feed pump we make in the following manner.
We place a cylinder inside a tank or reservoir, the bottom end of this cylinder
we pass through the tank or reservoir, or otherwise, to form the discharge pipe,
where we place a feed valve; on the discharge pipe and over the feed valve, we
place an air vessel. The cylinder inside the tank or reservoir is immersed in water
and inside it we put a piston or plunger, connected by a rod to the most convenient
suitable part of an engine. Round the cylinder we have slotted or circular
openings, which come below the piston when the latter is at the top of its stroke,
enabling the water to run into the cylinder. When the piston is on its downward
stroke, it covers the openings and forces the water against the valve, lifting it
against the pressure; and on the return stroke the valve closes, the piston again
passes the slotted openings until it is above them, and the cylinder again fills through
he openings ready for forcing out. Should there be any leakage in the piston or
lunger it passes back into the receiver or tank.
This arrangement does
hich are always more or less a source of trouble.
away with the necessity for foot valves and stuffing boxes
In the drawings annexed hereto Fig. 1 gives a sectional view and Fig. 2 a plan,
our improved pump.

page_text: A is the tank or reservoir for receiving the water, inside this tank or reservoir
we place a cylinder B, the bottom end of this cylinder being fastened to the tank
at C. as shown in Fig. 1. At the bottom end of the cylinder B. we place a
discharge valve D. with a spring at the back as shown at E. Inside the cylinder B.
we place a ram or plunger F., this ram or plunger being about half way down the
cylinder when it is at the end of its backward stroke, when in this position it leaves
the slotted openings shown G., which we make in the cylinder B., free to admit the
water from the tank A. The water then fills the bottom end of the cylinder B.,
and when the ram or plunger F. is on its downward stroke, it forces this water out
through the valve D. and through the outlet H. On its return stroke it creates a
vacuum, and on passing the openings G., it draws in the water through these
openings, to be again forced out as already described.
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. The improved boiler feed pump, substantially as described, having a ram or
plunger fitted inside a cylinder having slotted or other openings for the admission
of the water, in place of the usual suction valve.
2. In a boiler feed pump the use of a plunger or ram, working in a cylinder
having slotted or other openings, substantially as described.
3. In a boiler feed pump, the use of a cylinder having slotted or other openings,
and fitted with a ram or plunger, the whole working inside a tank or reservoir
containing the water, and being entirely immersed in the water.
Dated this 15th day of October 1891.
E. WIGZELL.
JOSEPH POLLIT.