Improvements in and relating to Pressure-fluid Controlling Apparatus.
Year: 1892

page_text: Date of Application, 20th Feb., 1892
Complete Specification Left, 15th Nov., 1892-Accepted, 28th Jan., 1893
PROVISIONAL SPECIFICATION.
Improvements in and relating to Pressure-fluid Controlling
Apparatus.
I, JOHN GILMOUR, of 64 Saint James' Street, Glasgow, Lanarkshire, Engineer,
do hereby declare the nature of my invention to be as follows:-
:-
This invention has reference to and comprises a new or improved method or
system, and construction and arrangement and combination of the parts of valves
and connecting pipes and fittings for controlling or instantaneonsly shutting off
and on the supply of steam from steam boilers, or compressed air, gas, or water
from main pipes or reservoirs, and which will have great advantages over the
methods heretofore in use.
As applied for controlling the steam supply from the boilers on board ship, the
improvements essentially consist in fitting a special construction of valve or valves
on or in connection with each steam boiler consisting of two pistons or organs of
different area connected or linked together from separate chambers or chests, and
on which the steam pressure will independantly act. The piston of smaller area
will pass or regulate steam from the boiler through its valve chest to the cylinder
of the engine or other source where a supply is wanted, but when said steam is
desired to be shut off, steam will be admitted to the chest or chamber in which
works the piston of larger area and which through its rod or link connection will
close the smaller piston or valve on its seat and instantaneously shut off the steam
supply from the boiler. While by turning off the steam pressure from the piston
of the larger area the steam supply will go on through the piston or valve of lesser
area to the engine cylinder or other source where it is wanted. The steam would
pass to the chest of the smaller piston or valve, preferably direct or by a branch
from the boiler, while a pipe connection would be led from the boiler to the engine
room or other convenient place where a two or three way valve or cock would be
fitted on it, and the pipe connection would be taken from this to the chamber in
which the piston of larger area works. By admitting steam through this hand
operating valve or cock to the larger sized piston the steam supply from boiler to
engine will be shut off; while by turning the valve to stop the supply to larger
piston the steam supply to engine will be instantaneously turned on.
group or number of boilers are used, a pipe connection would or may be taken
from one of the boilers, and branches be led from it to the chambers in which work
the larger pistons of each of the stop valves, so that in the event of a steam pipe
bursting or an accident occuring, by simply turning or operating the aforesaid hand
regulating valve in the engine room, all the stop valves would be closed and the
steam supply from all the boilers would be instantaneously shut off. While by
reversing the hand operating valve the steam supply would be turned on again.
A branch would lead from the hand operating valve to a condenser or the atmosphere
to discharge the steam accumulated in the pipe connections between it and the
larger or controlling pistons of the valves. Instead of steam being taken from one
of the boilers to pass through the hand operating valve and pipe connections to act
on the large pistons of stop valves to regulate the steam supply to the engines,
compressed air, water, or other fluid may be similarly used to produce a pressure,
and effect the same purpose. These fluid pressure regulating valves would consist
under one arrangement of a lower cylindrical chamber or chest with steam or fluid
inlet and outlet branches, and an upper chamber or chest bolted by flanges to the
lower chest, and having a close cover above to which would be connected a fluid
inlet branch pipe from the aforementioned hand controlling valve. A piston or
stop valve would work over a valve seat on the inlet branch of the lower chamber
Where a

page_text: and be connected by a rod passing through a stuffing box or tube to a piston of
considerably larger area in the upper chamber; and the action would be all as
previously described. A hand turning spindle would be fitted over the larger
piston so as to press on it and through the rod connection shut the lower piston or
stop valve on its seat by hand when so desired, sufficient play being left between
the bottom of the spindle and the top of the larger piston for the latter to act if the
steam supply should be turned on above it. In applying these improvements to
the stop valves heretofore fitted on steam boilers, the larger piston would be fitted
in a chest or chamber placed over and bolted to the stop valve chest, and the piston
rod pass through a stuffing box or packing to the smaller piston or valve which
would act on a seat on the inlet steam branch from the boiler, all otherwise as
previously described. Under a modified construction, short standards or columns
may be interposed between the lower and upper chests and have a transverse bar
between them, against which a helical or other spring mounted on the rod connecting
the pistons would bear or act so that when the fluid pressure was relieved from the
top of the larger piston the recoil of the spring would force up this piston and
accelerate the lifting of the lower piston or valve for the passage of the fluid.
Instead of placing the two chests or chambers in line over each other with their
pistons or valves connected by a straight rod, they may be placed some distance
out of this line, and have their pistons or valves connected to separate piston rods
working out through stuffing boxes and guides, in standard or bracket connections,
and operated through a lever or oscillating slotted rod or link connection between
the two piston rods, the piston rod of the larger piston being preferably fitted with
a helical or other return acting recoil spring.
Dated the 19th February 1892.
W. R. M. THOMSON & Co.,
96, Buchanan Street, Glasgow, Agents.
COMPLETE SPECIFICATION.
Improvements in and relating to Pressure-fluid Controlling
Apparatus.
I, JOHN GILMOUR, of 64 Saint James Street, Glasgow, Lanarkshire, Engineer,
do hereby declare the nature of my invention and in what manner the same is to
be performed to be particularly described and ascertained in and by the following
statement in writing, that is to say :-
This invention has reference to and comprises a new or improved method or
system, and construction and arrangement and combination of the parts of valves
and connecting pipes and fittings for controlling or instantaneously shutting off or
on the supply of steam from steam boilers, or compressed air, gas, or water from
main pipes or reservoirs, and which will have great advantages over the methods
heretofore in use.
And in order that my said invention and the inanner of performing or carrying
the same into effect or practice may be properly understood, I have hereunto
appended two explanatory sheets of drawings, in which the same reference letters
are used to indicate corresponding parts in all the figures where shown.
Figure 1, on Sheet 1, is an external elevation of a steam or other fluid-pressure
controlling valve as constructed in accordance with one arrangement of my
improvements. And Figures 2 and 3, are sectional elevations corresponding to
Figure 1, and respectively showing the valve in its closed and open positions.
Figure 4, on Sheet 2, is a plan view showing one general arrangement of valves,
pipe connections and fittings as applied on board-ship, to carry out my improved
method of controlling or instantaneously shutting off and on the steam supply in
connection with all the steam boilers B.
Referring to these drawings. As applied for controlling the steam supply from
the boilers on board ship, the improvements essentially consist in fitting a special

page_text: construction of valve or valves A, on or in connection with cach steam boiler B
consisting of two pistons or organs a¹, a², of different area connected or linked
together at a from separate chambers or chests A1, A2, and on each of which
the steam pressure will independently act. The piston a¹ of smaller area will pass
or regulate steam from the boiler through its valve chest A¹ to the cylinder of the
engine or other source where a supply is wanted, but when said steam is desired to
be shut off, steam will be admitted to the chest or chamber A2, in which works the
piston a² of larger area and which through the rod or link connection a will close
the smaller piston or valve a¹ on its seat A" and instantaneously shut off the steam
supply from the boiler. While by turning off the steam pressure from the piston a²
of larger area the steam supply will go on through the piston or valve a¹ of lesser
area to the engine cylinder or other part where it is wanted.
As shown in the general plan view Figure 4, on Sheet 2, the steam would be led
from each boiler B of the group from an ordinary stop valve mounted on it, by a
pipe connection to the inlet branch A, and chest A' of each valve A. The
outlet branches A³ leading from each valve chest A¹, would be jointed as shown on
the set of boilers to the left of Figure 4, to a transverse main pipe B', and the
steam would be led from the pipe B by preferably two longitudinal pipes B² to
the transverse pipe B similarly connected to the outlet branches A³ of the
chests A' of the valves A of the next set or group of boilers B; and longitudinal
main pipes B³ would lead the steam from the pipe B to the inlet steam chests E,
of the high pressure cylinder E¹ of the triple expansion engines E', E, E³, shown
in diagram view to the right of Figure 4.
A pipe connection c¹ would be led from a stop valve e on one of the boilers B,
to the engine room, or other convenient place, where a two or three way valve or
cock c² would be fitted on it, and pipe connections c³ would be taken from a pipe C
leading from this valve c² to the chambers A² of each valve A in which the
piston a² of larger area works, the pipe connections being jointed by couplings c¹
at each range of boilers B. By admitting steam through the hand operating valve
or cock c² to the branch c", the steam would pass through the pipe connections c³
to the chests A² and larger pistons a² of all the valves A., and all the valves a¹ of
smaller area would be closed against their seats A", and the steam supply from all
the boilers B, would be instantaneously shut off from the engines E1, E2, E³, so that
in the event of a steam pipe bursting or an accident occurring, by simply turning or
operating the aforesaid hand regulating valve c² in the engine room, the steam
supply would, as described, be instantly shut off. While by reversing the hand
operating valve c² the pressure would be relieved from the valve a² and the steam
supply would open the valves a' of each valve chest and so pass steam from all the
boilers B, to the engines. A branch d would lead from the hand operating valve c²
to a condenser, or the bilges, or atmosphere, to discharge the steam accumulated in
the pipe connections c¹¹, c³, between it and the chests A2 of the valves A. Instead
of steam being taken by the pipe c¹ from one of the boilers B to pass through the
hand operating valve c² and pipe connections e¹¹, c³, to act in the valve chests A² in
which works the pistons a² of larger area to regulate the steam supply to the
engines, compressed air, water, or other fluid may be similarly used to produce a
pressure, and effect the same purpose.
These fluid pressure regulating valves A, would consist under one arrangement
as shown in Figures 1 to 3 of a lower cylindrical chamber or chest A A¹ with
steam or fluid inlet and outlet branches A1, A³, and an upper chamber or chest A³,
bolted by flanges to the lower chest A, A', and having a close top cover A*, below
which would be connected the fluid inlet branch pipe c³ from the aforementioned
hand controlling valve c². The piston or stop valve a¹ would work over the valve
seat A", at the inlet branch A of the lower chamber A A', and be connected by
a continuation or a hollow rod a passing through a stuffing box or guide tube a" to
the piston a² of considerably larger area in the upper chamber A2; and the action
would be all as previously described. The upper surface of the valve a¹ in opening
acts against the projecting face all of the tube a¹¹, and forms a fluid tight joint to

page_text: prevent any escape of steam. A drain branch a³ would lead out from the chest A
to discharge any accumulated or condensed steam to the bilges or atmosphere and
relieve the pressure. A screw spindle C fitted with a hand lever C¹ would be
fitted through the cover A* and over the larger piston a², so as to press above it
and through the connection a shut the lower piston or stop valve a' on its seat A"
by hand when so desired, sufficient play being left between the bottom of the
spindle C, and the cross beam over the top of the larger piston a² for the latter to
act if the steam supply should be turned on above it. A cotter (" is fitted through
the spindle C to regulate its position.
Having now particularly described and ascertained the nature of my inven-
tion and in what manner the same is to be performed, I declare that what I
claim is,
First. The method or system for controlling, or instantaneously shutting off or
on the supply of steam from steam boilers, or steam or other pressure fluid from
main pipes or reservoirs by separate pipes and valves fitted with duplex pistons of
different area, and controlled by a hand operated valve in the engine room or at a
distance from the boilers, substantially as herein described in reference to and by
way of application shown in the accompanying drawings.
Second. In a system for controlling or instantaneously shutting off or on the
supply of steam or other pressure fluid as described in Claim 1, the arrangement
and use of a valve or valves fitted with duplex pistons of different area connected
together and working in separate chambers, the pressure fluid on the larger piston
being under the control of the operater, substantially as and for the purposes
herein described in reference to and by way of application, shown in the accom-
panying drawings
Dated the 14th November 1892.
W. R. M. THOMSON & Co.,
96, Buchanan Street, Glasgow, Agents.