Improvements in Gas Pressure Indicators.
Year: 1893

page_text: Date of Application, 1st Feb., 1898
Complete Specification Left, 1st Nov., 1893-Accepted, 2nd Deo., 1893
PROVISIONAL SPECIFICATION.
Improvements in Gas Pressure Indicators.
We JAMES PUROELL, of 15, South Street, Toxteth Park, Liverpool, in the
County of Lancaster, Gas Apparatus Fittor, and SAMUEL CARNABY, of 91, Pitt
Street, Liverpool, aforesaid, Gas Apparatus Maker, do hereby declare the nature
of this invention to be as follows:-
:-
-
Hitherto numerous devices have been introduced for equalising the flow of gas,
notwithstanding varying pressure in the main and the variations produced by
turning on or shutting off gas to or from burners in the building.
The present invention has for its object a device for producing an audible
indication when there is an inorease or a decrease in the normal pressure of the gas
supply.
In carrying out our invention, we form a cup with a rim inverted over the end of
the inlet pipe. The rim of this cup dips into an annular trough containing mercury,
glycerine or other suitable substance. This cup is weighted and is connected with
a contact device which is capable of closing an electric bell circuit by the movement
of the cup. During the normal pressure of gas, the cup remains at its lowest
position, but as the pressure of gas increases, it acts upon the inside of the cup,
lifting the contact device which closes the contact, and thus completes the circuit
in which the bell and battery are placed. The bell (which is preferably of the
automatic make and break type) is thus rung and the attention of the proprietor is
drawn to the fact that the pressure requires adjusting. On the removal of the
excessive gas pressure, the cup falls by its weight, pulling away the contact device,
and opening the circuit.
To indicate an inadequate pressure of gas, the pressure of gas is arranged
beneath the cup as before, and the latter, when the pressure decreases, descends,
forming in its descent (by means of a contact dovice) contact with the wires and
closing the electric bell circuit.
There are, of course, various forms of contact devices which may be used, but
we do not limit our invention to any particular arrangement. The movement
required to bring the contacts together is accomplished automatically by the rising
or falling of the cup. The weights may be adjustable if desired. Instead of a
cup, a suitably shaped diaphragm of leather or other material may be employed.
Dated this 31st day of January 1893.
WM. P. THOMPSON & Co.,
Of 6, Lord Street, Liverpool, Patent Agents for the Applicants.
COMPLETE SPECIFICATION.
Improvements in Gas Pressure Indicators.
We, JAMES PURCELL of 15, South Street, Toxteth Park, Liverpool in the
County of Lancaster, Gas Apparatus Fitter and SAMUEL CARNABY of 91, Pitt
Street, Liverpool, aforesaid Gas Apparatus Maker 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 :—
Hitherto numerous devices have been introduced for equalising the flow of gas
and counteracting the varying pressure in the main and the variations produced by
turning on or shutting off gas to or from burners in the building.

page_text: 2. The special arrangement and construction of parts substantially as illustrated
of described and for the purposes set forth,
Dated this 31st day of October 1893.
2. The special arrangement and construction of parts substantially as illustrated
fucscriue for purposes 866 forth,
Dated this 31st day of October 1893.
WM. P. THOMPSON & Co.,
LOTnal Hanation N
and Landan Patent & monts
ucscriued aire for the purposes so worth,
Dated this 31st day of October 1893.
WM. P. THOMPSON & Co.,
1Of Liverpool,
Limounool Manchester, Nottingham,
L
London, Patent Å manta
WM. P. THOMPSON & Co.,
Of Limauncel
Manali
enter, Nottingham,
--
London,
Detent &ments.