Improvements in automatically closing valves more particularly those adapted for water gauges & governor valves.
Year: 1887

page_text: Date of Application, 1st July, 1887
Complete Left, 31st Mar., 1888
Complete Accepted, 15th June, 1888
1 ROBERT BROUGH of 9 Western Hill Sunderland in the county of Durham
Engineer do hereby declare the nature of this invention to be as follows:-
Improvements in automatically closing valves more particularly those adapted for
water gauges & governor valves.
In carrying out my invention I adopt mainly the following arrangements for
closing automatically water & steam valves as used for Water gauges of Boilers &
governors for controling speed. I use a metallic piston, diaphragm, or other similar
device secured to a hollow spindle having a valve with a spigot on one end & a cam or
lever box on the other for opening & closing by hand.
The spigot on the valve end of the hollow spindle fits loosely into a valve seating so
as to contract the area, the pressure being always at the back of the metallic piston,
diaphragm or other similar device by means of the hollow spindle. The metallic piston
working loosely in a barrel or chamber or in the case of a diaphragm it may be
secured between the joint of the barrel or chainber & that portion containing the valve
seating, thus in the case of Water Gauge valves when the valves are open
pressure
is equal on both sides of the metallic piston, diaphragın or other similar device, but
immediately the steam or liquid is drawn off or the glass breaks, the area of the
metallic piston diaphragm or other similar device being greater than the area of the
valve it will instantaneously close & so stop the rush of steam or liquid.
I
the
For opening or closing by hand I use a box worked by a cam or lever movement but
may also use a screw movement if desirable.
I also for automatically closing the valve dispense with the hollow spindle & lead a
separate pipe from the Boiler to the back of the metallic piston, diaphragm or other
similar device, should the draw off be great it will at once relieve the pressure on the
the
valve side of the metallic piston, diaphragm or other similar device & cause pressure
IDQ17

page_text: at the back to intantaneously close the valve. To open the valve again I close the
pressure of the Boiler from the back of the metallic piston, diaphragm, or other similar
device & allow it to escape, the pressure then being on the valve immediately causes it
to open. I also use the cam or lever movement for this arrangement for opening &
closing by hand or if required I may also use the screw movement.
In the case of controling speed I use any description of equilibrium valve to which
I attach a spindle having a metallic piston, diaphragm or other similar device working
loosely or secured in a barrel or chamber as the case may be. The front or valve side
of the metallic piston, diaphragm or other similar device being always open to the
working pressure of the steam or liquid, to the back I lead an auxiliary pipe direct
from the Boiler so that immediately the steam or liquid is drawn off quickly from the
front or valve side of the metallic piston, diaphragm or other similar device the Boiler
pressure will close the valve. In conjunction with this arrangement I use a spring for
regulating the closing of the valve & I may also if necessary use a hollow spindle &
dispense with the auxiliary pipe from the Boiler.

page_text: those Adapted for Water Gauges and Governor Valves.
I ROBERT BROUGH of 9 Western Hill Sunderland in the county of Durham 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:-
The object of my invention is to provide a suitable valve of simple construction to
be used as water gauge valves for various descriptions of steam boilers or any other
description of apparatus were a sudden escape of steam, liquid or gas, dangerous to
those in charge, also to prevent detention by loss of water or probable damage to
boilers caused by the breaking of a gauge glass during night or any other time when
under pressure in the absence of the attendent, to avoid this danger I have so
constructed a valve that immediately the gauge glass breaks the valve closes auto-
matically & remains so until opened again by hand.
In the case of governor valves these are so arranged that should the consumption or
draw off of steam, gas or liquid be greater than required it can be regulated by means
of a spring or weight as desired or it may be constructed to close at a given
consumption or draw off by means of the difference in areas thus in the case of a
steam engine the valve can be adjusted to supply steam for a given number of revolutions
but should the number of revolutions increase the consumption or draw off of steam
will be greater consequently the valve will close.
The manner of working my invention may be thus described by means of the
accompanying drawings. Figure 1 is a sectional view through the body of a water
gauge valve embodying my invention as adapted for this object, in the practice of
working my invention I provide a suitable description of body as shown in Figure 1
& 2 having a way through from the boiler to the gauge glass but controlled or stopped
in any desired part by means of a valve, to this valve I attach a piston diaphragm or
other similar device which is secured or working loosely in a barrel or chamber & is
so arranged that when the valve is open the pressure is equal on both sides of the
piston diaphragm or other similar device, the pressure may be led through a hole in the
valve & piston to the back, or by means of a separate way or pipe, it will thus be seen
that immediately the glass breaks or the draw off is greater than can pass the valve,
the pressure is reduced on the top or valve side of the piston, diaphragm or other
similar device consequently the pressure being always at the back of the piston,
diaphragm or other similar device it will at once close the valve & so cut off the
communication from the boiler to the gauge glass. I may also use a body having a
straight way which is very desirable for cleaning purposes, in this case I use a species
of slide valve attached loosely or otherwise to the piston diaphragm, or other similar
device but any description of valve suitable for the purpose may be used, the mode of
working the valve in this form is as follows, the way from the boiler to the valve is

page_text: made smaller than the way from the valve to the gauge glass, consequently when the
glass breaks or the draw off is greater than can pass through the way from the boiler
to the valve, the pressure from the boiler to the back of the piston, diaphragm or other
similar device will instantly cause the piston, diaphragın, or other similar device, to
rise & so cause the valve to close the orifice from the boiler. For the purpose of
opening or closing the valve by hand I attach to the piston, diaphragm or other
similar device a box or opening of suitable construction so that the same may be
actuated by means of a cam or lever movement but I may also if required use a
screw movement for working the piston diaphragm or other similar device by
band.
Having thus far described the nature of my invention & in what manner the same
is to be performed or carried out I will now proceed by means of the accompanying
drawings to further & particularly describe in what manner the same is to be carried
into practice. Figure 1 represents a sectional view of the water gauge valves & shows
the passage N & valve O through. which the water or steam passes from the boiler to.
the gauge glass; the valve O piston P. & cam box K are in one piece. having a way R
through to the back of the piston P so that the full pressure is always maintained at
the back, it will thus be seen that immediately the glass breaks the pressure is relieved
from the front or valve side of the piston P the pressure which is always retained at
the back or bottom side of the piston P through the way R instantaneously closes the
valve 0, when required to work automatic the cam box K piston P & valve O are
entirely independent of the cam or lever L which should be placed in au horizontal
position as shown, the handle T for working the cam or lever L in the same position
as shown in Figure 2, if desired to work as an ordinary water gauge valve the
handle T & cam or lever L is placed in a downward position, the cam or lever L being
then in contact with the bottom of the cam box K prevents the whole from rising &
closing, the auxiliary valve S is closed by the action of the cam or lever L closing the
main valve & is adapted so that the plug nut V may he taken off for cleaning
purposes at any time, figure 3 represents the way in which the cam or lover spindle
is passed through the nut U & cam box K into its working position, the nut U being
also utilised for keeping the spindle J in position, the spindle J is provided with a
valve seating at M & again packed in the usual way thus reducing leakage to a
minimum.
Having now particularly described & ascertained the nature of my said inven-
tion & in what manner the same is to bo performed I declare that what I
claim is
1st. An appliance for automatically closing water gauge valves by means of
a piston diaphragm or other similar device in the manner & for the purpose
specified.
2nd. The use of the hollow spindle separate way or pipe for leading the pressure
to the back of the piston diaphragm or other similar device for the purposes
indicated.
3rd. The combination of a valve piston, diaphragm, or other similar device & cam
box worked by a cam or lever movement for the purposes above described & in manner
specified.
4th The use of any description of valve in combination with nistons diaphragms or