IMPROVEMENTS IN GAS HEATING APPARATUS
Year: 1876

page_text: LETTERS PATENT to George Ewart, of No. 840, Euston Road, London, Metal
Worker, for the Invention of "IMPROVEMENTS IN GAS HEATING APPARATUS."
Sealed the 19th December 1876, in pursuance of an Order of the Lord Chancellor,
RU UTV
Worker, for the Invention of "IMPROVEMENTS IN GAS HEATING APPARATUS."
Sealed the 19th December 1876, in pursuance of an Order of the Lord Chancellor,
and dated the 17th June 1876.
PROVISIONAL SPECIFICATION left by the said George Ewart at the Office
of the Commissioners of Patents on the 17th June 1876.
GEORGE EWART, of No. 346, Euston Road, London, Metal Worker.
MENTS IN GAS HEATING APPARATUS."
" IMPROVE-
My Invention has reference to the prevention of explosions in gas heating
apparatus.
In the ordinary gas burners used for heating the air is allowed to mix with the
gas from the moment when it is turned on, which causes the explosion.
My improvement consists in an automatic arrangement of mechanism, by means
of which the atmosphere is excluded before either lighting or extinguishing the gas.
The gas burners used to heat baths, boilers, and other vessels are usually constructed
so as to be withdrawn from under the vessel in order to light or extinguish the gas
in the open air. For this purpose the burner may be arranged upon ways, telescopic
or otherwise, to be slid in and out, or upon a swivelling arm or otherwise. This
movement of the burner in and out from under the vessel to be heated I take
advantage of to make it open and close suitable valves to either admit or exclude
the atmosphere, excluding the air until after the gas is lighted, and also excluding it
before the flame is extinguished, and admitting the air gradually after the lighting
of the gas as the burner is being moved under the vessel.
To illustrate my Invention, in heating a bath by gas the burner is attached to
a swiveling arm fastened to the side of the bath; this swiveling arm in my
Invention is a hollow cylinder formed with an aperture at its side to admit air; a
fixed valve is attached to the bath, which valve closes the said air hole upon the
movement of the swivelling cylinder as it is turned to bring the burner out from
under the vessel either for lighting or extinguishing the gas. This is one way of
carrying my Invention into practice, but I do not propose to confine myself to this
exact arrangement of mechanism, as other equivalent modes may be easily devised.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said George Ewart in the Great Seal Patent Office on the 20th December
1876.
GEORGE EWART, of 346, Euston Road, in the County of Middlesex, Metal Worker.
* IMPROVEMENTS IN GAS HEATING APPARATUS."
My Invention has reference to the prevention of explosion in gas heating
apparatus.
In the ordinary gas burners and for heating the air is allowed to mix with the
gas from the moment it is turned on, which causes the explosion.
My improvement consists in an automatic arrangement of mechanism, by means
of which the atmosphere is excluded before either lighting or extinguishing the
flame. The gas burners used to heat bath boilers and other vessels are usually
constructed so as to be withdrawn from under the vessel in order to light or extin-
guish the gas in the open air. For this purpose the burner may be arranged upon
ways, telescopic or otherwise, to be slid in and out, or upon a swivelling arm or
otherwise. This movement of the burner in and out from under the vessel to be
heated I take advantage of to make it open and close suitable valves to either
admit or exclude the atmosphere, excluding the air until after the gas is lighted,
and also excluding it before the flame is extinguished, and admitting the air
gradually after the lighting of the gas as the burner is being moved under the
vessel.
For example, to illustrate my Invention; in heating a bath by gas the burner is
attached to a swivelling arın fastened to the side of the bath; this swivelling arm
in my Invention is a hollow cylinder formed with an aperture at its side to admit
air; a fixed valve is attached to the bath, which valve closes the said air hole
upon the movement of the swivelling cylinder as it is turned to bring the burner
out from under the vessel either for lighting or extinguishing the gas.
Having now described my Invention, and the manner in which it is to be
performed, I would have it distinctly understood that I do not confine myself to
this exact arrangement of mechanism, as other equivalent modes may be easily
devised, but what I claim is, the use of the improved apparatus constructed and
employed as herein described, substantially for the purpose of preventing explosion
in lighting and extinguishing atmospheric gas burners.
In witness hereof, I, the said George Ewart, have hereunto set my hand and
seal, this Twentieth day of December, in the year of our Lord One thousand
eight hundred and seventy-six.