Apparatus for Automatically Shutting Off Gas on Withdrawal or Failure of Supply, and Maintaining such Shut Off until the Apparatus is Re-opened by Hand.
Year: 1886

page_text: Date of Application, 12th Aug., 1886.
Complete Left, 12th May, 1887.
Complete Accepted, 12th June, 1887.
Apparatus for Automatically Shutting Off Gas on Withdrawal or
Failure of Supply, and Maintaining such Shut Off until the
Apparatus is Re-opened by Hand.
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 :-
This invention relates to the construction of an apparatus, to be affixed to a gas
service or supply pipe, or to a branch, or bracket, at any part between the meter and
the burner and where many burners. are used, one of my apparatus according to
my present invention could be fitted to each.
The object is to prevent gas passing to a burner, should the gas supply from any
cause be shut off, and then put on again without notice being given to the consumer,
or when the supply is cut off from any accidental or other cause, thus ; supposing
for instance the gas is kept burning during the night or other time such as is usually
the case with Jewellers and other Tradesmen, for the security of their shops, or when
certain branches in a house of business are accidentally left burning, or in Hotels, and
other places, where the gas is shut off at the main at a given time, whether the branch
cocks in the various rooms are shut off or not, the apparatus falls, so that no gas can
pass, to its burner, until the apparatus is re-set by hand, thus, the danger of gas
escaping from any of the burners is prevented should the gas be turned on again at
the meter.
The apparatus for stopping the passage of gas, acts automatically, on the flow being
stopped, and must be set by hand, after the gas is turned on at the meter, before any
can pass to the burner, or burners.
The apparatus consists of a casing, in which is a basin, or cup, for holding mercury,
glycerine, or other liquid, into which a bell or float dips for sealing purposes. The
spindle which carries the bell has two valves, of any desired form, but, preferably,
hollow hemispheres with their broadest parts uppermost and arranged to rest
edge seatings, of an internal valve box, (without bushes) fitted inside the casing.
The valves are so set for action that the gas would act upon the smaller exposed
surface of the upper one, and upon the larger exposed surface of the lower one, and
upon

page_text: so maintain by its pressure a perfect seal. The spindle is weighted, according to the
initial pressure, so that the valves are, by the float kept off their seating while the
gas is passing through from one division, or inlet to the other division, or outlet, (as
in my previous Letters Patent No. 8127 of 1884; No. 7240 of 1885) but so soon as
the gas is turned off at the main, the pressure ceases and the weights on the spindle
causes the two valves to close the passages in the apparatus, until, as before stated,
the valves are lifted from their seats, this being effected by hand, on lifting the spindle.
I purpose fitting this apparatus in conjunction with one of my Patent Governors,
but it may be used without such a Governor, or with any other construction
of Governor.
I make the valve box with an open end, for readily fitting the valves in position, it
being necessary; or preferable, that the valves sit upon an edge seating to obviate
any acucmulation of dust, or anything that would tend to block the opening; or
prevent the valves obtaining a firm seating, without bushing the holes. The end of
the box when the valves are attached to the spindle is closed by a plate.
The float may dip into any kind of cup, or vessel but I prefer the cup, provided
with a shield, to prevent escape of mercury, or other liquid as described in my Patent
Specification No. 29 of 1879.
ישות
101
A1000
H. GARDNER,
166, Fleet Street, London,
⚫ Agent for the said James Stott.

page_text: COME LEID DI BOLTIVATION.
Apparatus for Automatically Shutting Off Gas on Withdrawal or
Failure of Supply, and Maintaining such Shut Off until the
Apparatus is Re-opened by Hand.
I, JAMES STOTT of 174 Fleet Street, City of London, Gas Governor 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 the construction of an apparatus to be affixed to a gas
service or supply pipe or to a branch or bracket at any part between the meter and
the burner and where many burners are used, one of my apparatus according to my
present invention could be fitted to each.
The object is to prevent gas passing to a burner, should the gas supply from any
cause be shut off, and then put on again, without notice being given to the consumer,
or when the supply is cut off from any accidental, or other cause, thus; supposing, for
instance, the gas is kept burning during the night or other time, such as is usually
the case with Jewellers, and other Tradesmen, for the security of their shops, or when
certain branches in a house of business are accidentally left burning, or in hotels, and
other places where the gas is shut off at the main at a given time whether the branch
cocks in the various rooms are shut off or not. The apparatus falls, so that no gas
can pass to its burner, until the apparatus is reset by hand, thus the danger of gas
escaping from any of the burners is prevented should the gas be turned on again
at the meter.
The apparatus for stopping the passage of gas acts automatically on the flow being
stopped, and must be set by hand, after the gas is turned on at the meter, before any
can pass to the burner or burners.
The apparatus consists of a casing in which is a basin or cup for holding mercury,
glycerine, or other liquid, into which a bell or float dips for sealing purposes. The
spindle which carries the bell has two valves of any desired form, preferably, hollow
hemispheres, with their broadest parts uppermost and arranged to rest upon edge
seatings of an internal valve box (without bushes) fitted inside the casing. The valves
are so set for action that the gas would act upon the smaller exposed surface of the
upper one and upon the larger exposed surface of the lower one and so maintain by
its pressure a perfect seal. The spindle is weighted according to the initial pressure,
so that the valves are by the float kept off their seating while the gas is passing
through from one division or inlet to the other division or outlet (as in my previous
Letters Patents No. 8127 of 1884 & No. 7240 of 1885) but so soon as the gas is
turned off at the main the pressure ceases and the weights on the spindle cause the
two valves to close the passages in the apparatus, until, as before stated the valves are
lifted from their seats, this being effected by hand on lifting the spindle.

page_text: I purpose fitting this apparatus in conjunction with one of my Patent Governors
but it may be used without such a Governor, or with any other construction of
Governor.
I make the valve box with an open end for readily fitting the valves in position it
being necessary, or preferable, that the valves sit upon an edge seating to obviate
any accumulation of dust or anything that would tend to block the opening or
prevent the valves obtaining a firm seating without bushing the holes. The end of
the box when the valves are attached to the spindle is closed by a plate.
The float may dip into any kind of cup, or vessel, but I prefer the cup provided
with a shield to prevent escape of mercury or other liquid as described in my Patent
Specification No. 29 of 1879.
G¹
My invention is represented in the annexed drawing Figure 1. A is the casing,
B the inlet for the gas, C the outlet, the two being divided by a screen D. E is an
opening in B for the passage of gas into the box F between the two valves G,
E is the spindle with valves G G₁ affixed and carrying the float I dipping into
mercury in the vessel J, said vessel having a shield K to prevent a spilling of the
mercury should the apparatus be tilted.
L, L, are weights on the spindle and contained within the upper part of the
casing A, said weights corresponding to the initial pressure of the gas. In lieu of
said weights being on the spindle as shown on the drawing they may be arranged on
side motion rock levers or said weight may be used in connection with a diaphragm
or spring may be used instead of weights.
M is a shield cap on the upper part to be removed to enable the spindle H and
valves G, G¹, to be lifted.
The valves are preferably hollow coned hemispheres and the lower valve G¹ has a
larger surface exposed in the valve box than the upper G consequently the two
valves G, G', would be kept upon their seatings by the. weights Land by the gas
pressure until they are lifted, when the passage of gas into the float I would
equilibriate them. The valve box F is made with an open face to allow of the valve
being inserted from the end which is afterwards closed by a plate N.
P is a plug which can close the end Q or B according to the position of the
supply pipe to which the apparatus is affixed.
R is a screw pin, the removal of which allows condensed water to flow out of C.
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 :-
The apparatus shown on the annexed drawings, in which two valves act automatically
for shutting off gas on the withdrawal or failure of supplying and maintaining such
shut off until the valves are reset by hand for the usual passage of gas to the burners
as described.