Year: 1887

page_text: Date of Application, 26th Sept., 1887
Complete Left, 26th June, 1888
Complete Accepted, 27th July, 1888
We, DAVID PARSONS, DAVID JOHN PARSONS, JOSEPH HENRY PARSONS and SAMUEL
JESSE PARSONS, all trading together as David Parsons & Sons, of Corbyns Hall Iron
Works, Pensnett, near Dudley, Staffordshire, Engineers and Ironfounders do hereby
declare the nature of this invention to be as follows:-
:-
This invention has reference to those automatic feed water regulators for steam
boilers in which the water inlet valve to the boiler is controlled by the action of a float
in the boiler and the object of this invention is to so construct and arrange the parts
of such regulators that they will last a long time in wear and be thoroughly reliable
in action.
For the purposes of this invention we provide a suitable valve box or outer casing
having an inlet and an outlet aperture underneath and an upper moveable cover giving
access to the interior. The inlet opening is connected to the feed pump and the outlet
opening to the boiler. The inlet opening is, within the valve box, provided with a
ball valve serving as a back pressure valve fitting on a suitable seating and free to
open by a pressure from without but closed by a pressure from within the valve box.
A suitable guard prevents this valve rising too high from its seating. The outlet
opening is provided with a ball valve fitting on to a circular seat within the box or
casing. This ball valve is threaded on to a lever which at one end is fixed to a
horizontal rocking shaft passing through the chamber from side to side and working
steam tight in suitable stuffing-boxes. By turning the rocking shaft around its axis
through a small anglo in one direction the said outlet valve is raised off its seating
and the outlet opened, and by turning the shaft in the opposite direction the valve is
brought on to its seat and the outlet closed. This rocking shaft receives motion from
a float in the boiler preferably by means of the following arrangement of
mechanism Above the box or casing and at right angles to the said rocking shaft
is a two armed float lever mounted on a second rocking shaft which works in bearings
in the box cover. The float is hung from one end of the float lover by a chain or rod
passing through a stuffing-box in the boiler shell in the ordinary manner and is
--

page_text: counterbalanced by a weight on the other end of the lever. The two rocking shafts
are provided with levers by which motion is transmitted from the second to the first
rocking shaft.
When the water level in the boiler falls below the mean water line the float falls with
it and by the levers, rocking shafts and connections above described raises the outlet
valve off its seating and admits more water to the boiler the back pressure valve
meanwhile opening and closing with each beat of the feed pump. On the float rising
to its normal level again the outlet valve closes and cuts off the water supply. The
links connecting the rocking shaft levers together are slotted at one end so as to
allow the float to vibrato above its normal level without straining the lovers and
rocking shafts.
As the internal rocking shaft has very little weight to carry and has to move
through but a very small angle to open or close the outlet valve the wear in its
stuffing-boxes is very slight and they last a long time without repacking; and by the
other parts of the mechanism being external and exposed to view they are not liable
to corrosion by the water.
The back pressure valve is preferably arranged in the same valve box as the outlet
valve above described but if preferred an ordinary back pressure valve in a separate
valve box may be used.

page_text: CUMI LIE DI DUIFICATION.
Improvements in Automatic Feed Water Regulators for
Steam-boilers.
We, DAVID PARSONS, DAVID JOHN PARSONS, JOSEPH HENRY PARSONS and
SAMUEL JESSE PARSONS, all trading together as David Parsons & Sons, of Corbyns
Hall Iron Works, Pensnett, near Dudley, Staffordshire, Engineers and Ironfounders, do
hereby declare the nature of this invention and in what manner the same is to bo
performed, to be particularly described and ascertained in and by the following
statement:
This invention has reference to those automatic feed water regulators for steam
boilers in which the water inlet valve to the boiler is controlled by the action of a
float in the boiler and the object of this invention is to so construct and arrange the
parts of such regulators that they will last a long time in wear and be thoroughly
reliable in action.
For the purposes of this invention we provide a suitable valve box or outer casing
having an inlet and an outlet aperture underneath and an upper moveable cover
giving access to the interior. The inlet opening is connected to the feed pump and
the outlet opening to the boiler. The inlet opening is, within the valve box, provided
with a ball valve serving as a back pressure valve fitting on a suitable seating and
free to open by a pressure from without but closed by a pressure from within the
valve box. A suitable guard prevents this valve rising too high from its scating.
The outlet opening is provided with a ball valve fitting on to a circular seat within
the box or casing. This ball valve is threaded on to a lever which at one end is
fixed to a horizontal rocking shaft passing through the chamber from side to side and
working steam tight in suitable stuffing-boxes. By turning the rocking shaft around
its axis through a small angle in one direction the said outlet valve is raised off its
seating and the outlet opened, and by turning the shaft in the opposite direction the
valve is brought on to its seat and the outlet closed. This rocking shaft receives
motion from a float in the boiler preferably by means of the following arrangement
of mechanism :-Above the box or casing and at right angles to the said rocking
shaft is a two armed float lever mounted on a second rocking shaft which works in
bearings in the box cover. The float is hung from one end of the float lever by a
chain or rod passing through a stuffing-box in the boiler shell in the ordinary manner
and is counterbalanced by a weight at the other end of the lever. The two rocking
shafts are provided with levers by which motion is transmitted from the second to the
first rocking shaft.
When the water level in the boiler falls below the mean water line the float falls
with it and by the levers, rocking shafts and connections above described raises the
outlet valve off its seating and admits more water to the boiler the back pressure
valve meanwhile opening and closing with each beat of the feed pump. On the float
rising to its normal level again the outlet valve closes and cuts off the water supply.
The links connecting the rocking shaft levers together are slotted at one end so as
to allow the float to vibrate above its normal level without straining the levers and
rocking shafts.

page_text: As the internal rocking shaft has very little weight to carry and has to move
through but a very small angle to open or close the outlet valve the wear in its
stuffing-boxes is very slight and they last a long time without repacking; and by the
other parts of the mechanism being external and exposed to view they are not liable
to corrosion by the water.
The back pressure valve is preferably arranged in the same valve box as the outlet
valve above described but if preferred an ordinary back pressure valve in a separate
valve box may be used.
We will now proceed to describe with reference to the accompanying drawing the
manner in which our said invention is to be performed.
Fig. 1 represents in part sectional front elevation and Fig. 2 in part sectional end
elevation a steam boiler feed water regulator constructed according to this invention
and Fig. 3 is a plan of the same, partly in section, with the cover and top gear
removed.
is the
a is the valve box provided with the cover a² and b. is the inlet through which the
feed water enters and c is the outlet to the boiler. Part of the shell of the boiler is
shewn and marked d. e is the back pressure valve fitting on the seating which also
forms a guard for controlling the lift of the valve. 9 is the valve which regulates
the flow of the water to the boiler and is the seating on which it fits.
rocking shaft passing through the valve chamber and having the lever j on which
the valve g is threaded; k¹, k² are the stuffing boxes through which the rocking
shaft i projects at each side of the valve box a. is the float in the boiler suspended
by the rod and chain 2 from one end of the two armed float lever m and counter-
balanced by the weight n. o is the second rocking shaft on which the float lever is
mounted and which works in the bearings p, p on the cover. Fixed on to the rocking
shaft is a pair of levers 9, 9 one on either side of the valve box the free ends of
which are connected by the links r, r to the side levers s, s on the rocking shaft i
below. The lower ends of the links, are slotted where the joint pins of the
levers s, s pass through so as to allow the float 1 to move up or down through a short
space without affecting the valve g.
The operation of the parts above described is as follows:-When the water level
in the boiler falls below the mean water line the float falls with it and its motion
is transmitted by the rod and chain 12, lever m, rocking shaft o, side levers q,
links r, r, and side levers s, s to the rocking shaft i which is turned through a sinall
angle and the valve g opened so as to admit more water to the boiler; and on the
float rising to its normal level again the outlet valve g closes and cuts off the water
supply.
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 wo
claim is :-
1st. In an automatic feed water regulator for steam boilers, the combination with
the water outlet valve and float and float lever of means for operating the said
outlet valve from the said float lever, substantially as, and for the purposes,
described.
2nd. The arrangement and combination of parts constituting the improved auto-
matic feed water regulator for steam boilers hereinbefore described and illustrated by
the accompanying drawing.