Year: 1886

page_text: Date of Application, 29th Oct., 1886.
Complete Left, 25th June, 1887.
Complete Accepted, 26th July, 1887.
I, JAMES STOTT of 174 Fleet Street, City of London, Gas Governor Manufacturer
do hereby declare the nature of this invention to be as follows
The object of this invention, is to combine in one apparatus, appliances for
regulating the flow of gas for ordinary consumption. Appliances for stopping the
flow of gas, should the gas be accidentally or otherwise turned on or resupplied after
a shut off or failure of supply also as a means for indicating escape of gas through a
faulty pipe or of a burner of any branch connected with the service pipe having been
accidentally left on.
For the purpose of my invention, I may take an ordinary gas regulator either
provided with a mercury or liquid float or with a diaphragm and attach to the spindle
one or more stop valves in addition to the ordinary valve or valves but set in such
position that when the pressure of gas is removed the additional valve shall fall on its
seat and remain closed even after the pressure is agained turned on. To one of said
stop valves or to the valve box casing, I provide an aperture or hole preferably
closable to the minutest extent by a screw pin so that only a small quantity of gas
would be permitted to pass through to a burner but directly said burner is shut off or
an escape detected and stopped, the stop valve or valves will rise and open the
passage for the flow of gas which would then act upon the ordinary regulating valve
or valves for governing purposes.
The float, if a float be employed, has a belt or excrescence of any suitable material
formed in or attached to its body above the ordinary submersion level so that when
the pressure is reduced to a minimum, the float in dipping deeper into the mercury or
liquid meets with a resistance which prevents the stop valves closing, but in the event
of the pressure being altogether removed the float is permitted to descend and the
valves to close.

page_text: In the case of a diaphragm governor a spring may be fitted for adjusting the stop
valve as to its closing.
While any gas is passing from the service, the small opening referred to in the
valve, or valve box would allow a small quantity to pass to an open burner or to the
escape but the stop valve would not lift from its seat until the burner be shut off or
the escape detected and stopped after which the gas passing through the small aperture
would accumulate and its increase of volume would act equally on each side of the
valve but having a preponderence of pressure under the float would lift the stop
valve from its seat and put the appliances in position for governing the flow.
I have referred to the hole for the small quantity of gas to pass being in the valve
or valve box but it may be in any other desired part of the apparatus or in a bye pass.
I have referred to the stop valves falling to close the apertures but by a lever or
other arrangement in connection with the float, said valve or valves may be made to
close under a rising action.
Dated this 29th day of October 1886.
H. GARDNER,
166, Fleet Street, London,
Agent for the said James Stott.

page_text: COMPLETE SPECIFICATION.
A Combined Gas Regulator and Automatic Safety Stop Valve.
I, JAMES STOTT, of 174 Fleet Street, City of London, Gas Regulator Manufacturer,
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 :-
This invention relates to certain details in connection with gas governors and
consists First. In fitting stop valves in addition to the governing valve on the same
spindle so that should the supply of gas be shut off at the meter or the service pipe,
the stop valves fall and take their seating which will prevent gas passing through the
apparatus until the valves be lifted from their seat by hand to enable the regulating
valves to act as governing valves for regulating the supply of gas to the burners, said
regulator acting as a governor for producing a steady equable flame at all the burners.
The governor adjusts itself in proportion to the number of burners lighted so that the
flame of one or many burners would be of the same intensity, the governing pre-
venting roaring or other noise at the burners by checking the flow should additional
pressure be put in the service pipe.
Second. To affixing a minute passage tap to the valve box or to the partition or to
a bye pass arranged at the inlet and outlet passages but preferably said tap is in the
form of a screw pin capable of adjustment in a socket piece to close more or less a
side opening to allow a small quantity of gas to pass through the apparatus sufficient
to supply a pilot light or to enable a gas fitter to test the pipes as to leakage but
which small supply after a certain lapse of time, supposing all the taps to be closed
and there being no leakage will permit sufficient gas to accumulate in the governor to
raise the float and the stop valves from their seating whereby the apparatus would get
into position for governing purposes.
I provide a chamber at the upper part of a casing containing a combined gas
governor and stop valve secured on the same spindle and fit in said chamber a thimble
carrying weights not permanently attached to the spindle, so that when the spindle is
lowered beyond a fixed distance the thimble rests upon the bottom of the chamber,
said spindle having a further downward motion and the float a greater dip into the
mercury, if mercury be used, until the stop valves rest upon their seats of the
valve box.
Third. In gas regulators having a mercury or liquid trough, in which a float dips
providing said float with a belt or excresence of any material above the ordinary
submersion level, so that when the pressure is reduced to a minimum the float in
dipping deeper into the mercury or liquid will not permit the stop valves to com-
pletely close except when the inflow of gas is completely cut off. I also provide the
lower parts of a gas regulating float with a lip or projection to retard or check any
sudden movement being given to the float, such as when the gas is turned on suddenly
whereby jumping or tremulous action of the float is prevented.
To enable others to clearly understand my invention I annex 4 sheets of drawings.

page_text: In Figure 1 the valves are shown in position when the gas is passing through the
apparatus and being regulated. Figure 2 shows the stop valves upon their seats when
the supply of gas has been shut off.
I will first describe the operation of the apparatus for governing the supply of gas.
A is the inlet pipe for horizontal feed and B the inlet pipe for a vertical feed which
is shown with a shut off plug C, so that gas can enter at A only which gas passes into
the box D and through the apertures EE and also through the annular space F
surrounding it accumulates in the chamber formed between the shield G and the dome
of the float H to raise the float H in the mercury, the height to which the float shall
rise being determined by the weights I, I, upon the spindle J, which weights are
increased or decreased according to the maximum number of lights connected with
that service whereby the action of the valves is equilibriated and the flow of gas
through the apparatus kept uniform, the gas passing to the burners by the outlet K.
My stop valve mechanism fitted in combination with my regulating appliances is
as follows.
On the same spindle J that carries the regulating valves L I fit stop valves M M
which when the supply is turned off or otherwise cut off drop by their weight upon
their seats of the box as at Figure 2, the float H dipping deep into the mercury and
not capable of rising until the cup is removed and the spindle lifted by hand to enable
the apparatus to react as a governor.
As the stop valves M. M descend, the spindle J is carried down with them and in
this descent the weights I I which are carried by a thimble N rests on the bottom of
the weight chamber as indicated at Figure 2 so that the spindle J has a further and
independent motion the weight of the float and of the valves with the spindle being
sufficient to keep the valves M M on their seats.
If a pilot light is required I fit the box D with a nipple P and turn the gas
sufficiently on at the meter for that purpose but not to the pressure that would lift the
stop valve M M from their seats and I provide the nipple P with a screw pin Q to
regulate the quantity of gas passing through the aperture in the nipple, which gas
passes to the outlet K to feed a pilot. This supply of gas which is very minute can
also be utilized for detecting escape of gas from a faulty pipe or otherwise because if
all the burners are turned off and the gas turned on for this small supply and the
burner farthest from the apparatus be turned on to be lighted and will not light it
will be evident to an attendant that an escape exists somewhere, by this means the
pipes can be tested without danger.
I have described this nipple P and screw Q for the pilot light and testing purposes
as attached to the valve box D but it may be in the partition T or in a bye pass
from A to K.
If the gas be turned full on and all the burners are shut off, the gas passing through
the nipple P would accumulate in the chamber F and having a free access to the space
under the dome H would by its volume and pressure be sufficient to lift the float and
the stop valves from their seats and as the spindle J in rising reaches the top of the
thimble N, gas having by this time passed through the orifices of the seatings E,
the accumulated gas under this full pressure would bring the valves L, L, into
equilibrium for the apparatus to act as a governor.
R is a belt or excresence on the float H which is above the mercury level when the
apparatus acts as a governor as indicated at Figure 1 but which when the gas is only
partly turned off at the meter the pressure and volume of gas passing through the
apparatus are reduced, the float allows the belt to be only partly submerged, so that
the stop valves will not completely close, the reduced supply passing through in the
ordinary manner but if the gas be completely cut off the belt will be submerged as
at Figure 2 and the stop valves fall on their seats to be acted upon in the manner
before described when the gas is again turned on to its fullest extent either by lifting
the spindle or by the accumulation of gas at the high pressure.
S is another excrescence, lip, or ledge, formed at or near to the bottom of the float
projecting therefrom which retards the upward action and downward action of the
Hoat if the gas be turned fully on or fully off suddenly and it prevents a chattering

page_text: noise being heard from the apparatus when the gas is turned on suddenly. This lip S
for convenience is placed at the bottom of the float H Figure 3 at the outside or at
the inside as at Figure 4 or inside and outside as at Figure 5 but it may be at a
distance from the bottom as at Figures 6, 7 and 8 or at any other part of the float but
submerged for the purpose.
I have described my combined regulating valves and stop valves as affixed to the
same spindle of a mercury regulator but they are equally applicable to what is known
as a diaphragm regulator.
Having now particularly described and ascertained the nature of this invention and
in what manner the same is to be performed I declare that what I claim is :-
1. In a gas governing apparatus.-Affixing to the same spindle J which carries
the governing valves L L, the stop valves M M which when the pressure is entirely
removed fall upon their seats, said seats being formed of the same orifice E, E, as that
against which the governing valves act but on the opposite sides of the valve box D as
described and substantially as shown in the annexed drawings.
2. In combination with a gas governor, fixing a pilot nipple P with adjustable
screw for permitting a minute quantity of gas to pass to a burner or for testing
the pipes as above described and substantially as shown on the annexed drawings.
3. In combination with a gas governor having stop valves M, M, on the same
spindle J which carries the governing valves L, L, a loose fitting thimble N for
carrying the weights I, said spindle J having a motion independent of the thimble N
as described and substantially as shown.
4. In combination with a mercurial or other liquid governor for gas the belt or
excrescence R fixed on the float H as and for the purpose described and substantially
as shown.
5. Making the float H of a liquid gas governor with a lip or lips S at or about its
lower part as and for the purpose described and substantially as shown.
6. In a gas governor or regulator the combination of the stop valves M M on the
spindle J which carry the regulating valves L, L, the nipple P with adjusting screw Q,
the loosely fitted thimble N, the belt or excrescence R and lip or lips S on the float H
all arranged as shown and acting in the manner and for the purposes described.
The 25th day of June 1887
H. GARDNER,
166, Fleet Street, London,
Agent for the said James Stott.