IMPROVE- MENTS IN GAS STOVES
Year: 1882

page_text: LETTERS PATENT to John Frederick Charles Norman of 17 Portsea Place,
West, London and Archibald Henry Plantagenet Stuart Wortley of Rosslyn
House Grove End Road, North West, London for an Invention of "IMPROVE-
MENTS IN GAS STOVES.”
PROVISIONAL SPECIFICATION left by the said John Frederick Charles
Norman and Archibald Henry Plantagenet Stuart Wortley at the Office of
the Commissioners of Patents on the 18th August 1882.
JOHN FREDERICK CHARLES NORMAN of 17 Portsea Place. West. London. and
ARCHIBALD HENRY PLANTAGENET STUART WORTLEY of Rosslyn House Grove End
Road. North West. London "IMPROVEMENTS IN GAS STOVES"
This invention of Improvements in Gas Stoves relates to those Stoves in which
gas is used for the purpose of heating and ventilating rooms or for the purpose of
heating water or other liquids or for cooking and is more especially designed to
carry out these objects by using pure air heated and into which no product of
combustion of the gas is allowed to enter.
The apparatus of any suitable form or dimensions consists of a small heating
chamber made of iron or other suitable material which is raised to the temperature
required by a Bunsen or other burner, pure air is admitted to this chamber by a
suitable pipe or duct leading to a source of pure air, and from this Chamber another
pipe or duct leads the air now warmed or heated to another chamber in which are
placed the articles to be heated cooked or otherwise dealt with this second Chamber
forms a comparatively large storage Room of hot air and from this the air when
required for warming the room is allowed to escape by suitable valves or doors
In this chamber also in the inlet and outlet self acting valves can be fitted so
that by acting on the Gas burner and on the supply of air passing through the
two Chambers the heat can be regulated as desired
Beside the heated air allowed to escape into the Room a great deal of heat
can be gained by radiation from the outer casing of the stove for the principle of
the invention consists not only in the two chambers as described but also in the

page_text: fact of these two chambers being enclosed in an outer chamber of iron or other
suitable material; in the space thus enclosed all the products of heat and combustion
derived from the burning gas circulate fed with air at the lower part and passing
away at the upper part to the chimney or flue to carry them out of the house.
The apparatus therefore has an inner chamber receiving the full force of the
burning gas a second chamber as described and an outer envelope the first chamber
receiving only pure air becoming heated and passing into the second chamber there
retained or escaping as required and an outer envelope in which circulates the
products of combustion and which are applied as subsiduary to heat the first and
second Chambers and the outer envelope all these products of combustion passing
away to the chimney flue and not being permitted to enter the room all objections
to heating by gas in dwelling rooms are met and provided against
If the stove is tall two or three or more heated chambers can be used one over
the other.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said John Frederick Charles Norman and Archibald Henry Plantagenet
Stuart Wortley in the Great Seal Patent Office on the 16th February 1883.
JOHN FREDERICK CHARLES NORMAN of 17 Portsea Place West London and
ARCHIBALD HENRY PLANTAGENET STUART WORTLEY of Rosslyn House Grove End
Road North West London "IMPROVEMENTS IN GAS STOVES"
This Invention of improvements in gas stoves relates to those stoves in which
gas
is used for the purpose of heating and ventilating rooms or for the purpose of
heating water or other liquids or for cooking and is more especially designed to
carry out these objects by using pure air heated and into which no product of
combustion of the gas is allowed to enter.
The apparatus of any suitable form or dimensions consists of a small heating
chamber made of iron or other suitable material which is raised to the temperature
required by a Bunsen or other burner, pure air is admitted to this chamber by a
suitable pipe or duct leading to a source of pure air, and from this chamber another
pipe or duct leads the air now warm or heated to another chamber in which are
placed the articles to be heated cooked or otherwise dealt with, this second chamber
forms a comparatively large storage room of pure hot air and from this chamber
so much of the air as is required for warming the room is allowed to escape by
suitable valves or doors the remaining hot air keeping the storage chamber hot
and anything contained therein.
In this chamber also in the inlet and outlet pipes for air self acting valves
can be fitted so that by acting on the gas burner and on the supply of air passing
through the two chambers the heat can be regulated as desired.
Beside the heated air allowed to escape into the room a great deal of heat can
be gained by radiation from the outer casing of the stove for the principle of the
Invention consists not only in the two chambers as described but also in the fact
of these two chambers being enclosed in an outer chamber of iron or other suitable

page_text: material in the space thus enclosed all the products of heat and combustion derived
from the burning gas circulate, fed with air at the lower part and passing away at
the upper part to the chimney or flue or other outlet to carry them out of the
house or room.
The apparatus therefore has a lower chamber receiving the full force of the
burning gas a second chamber as described and an outer envelope, the first
chamber receiving only pure air, becoming heated, and passing into the second
chamber, there retained, or escaping as required and an outer envelope in which
circulate the products of combustion and which are applied as subsidiary to heat
the first and second chambers, and the outer envelope; all the products of
combustion passing away to the chimney flue or other outlet and not being
permitted to enter the room, all objections to heating by gas in dwelling rooms are
met and provided against.
If the stove is tall two or three or more heated chambers can be used one over
the other.
In the Drawings forming part of this Specification in which Figure 1 is a
sectional elevation, Figure 2 a cross sectional elevation, Figure 3 a plan parts
removed, Figure 4 detail of the application of the burner-like letters describe
like parts.
The stove is formed of sheet iron or sheet iron and copper or other material
carefully and tightly rivetted or fitted so that no leak can exist at any of the
joints for this is essential to the proper working of the stove.
a is the base or chamber in which is placed the burner k. b the heating chamber.
c the cooking warming and warm air reservoir or hot closet. d the space between
the chambers and the outer casing. e pipe supplying pure air. f pipe conveying
away the products of combustion. g opening from heating chamber to hot closet.
g' baffle plate shewn in dotted lines Figure 2.
In the drawing the stove is represented of square form though it may be made
circular oval or oblong or of any suitable form and is represented standing on
suitable feet and the aperture to the gas burner is in the bottom of the stove at h,
round this bottom is a border or margin h' the object being that in the combustion
chamber and in the space or casing d there shall be no opening outlet whatever
except to the chimney and the only inlet in the bottom of the stove h, the
margin protecting any escape there except by a downward current and as this
could not happen after the stove is lighted seeing that after lighting upward
currents only could exist there is absolutely no possibility of the products of
combustion entering into the room this is one of the essential features of the
Invention and makes the stove absolutely innoccuous even in a conservatory. I
either have a bottom plate as at h perforated for entrance of air or do not have
this bottom at all. It is important to notice that the air to supply the burner
and passing to the chimney is drawn from the roon under the margin ¹ and
consequently completely ventilates the room. The question of a bottom or not
will depend upon which use of the stove is most needed, in each instance ventilation
or heating.
In the chamber b made relatively small for the more rapid heating from a
suitable gas burner, (any form of Bunsen or other as preferred) e is the inlet pipe
which communicates directly with the outer air-the aperture from this chamber b
to chamber c is by the opening g and the chamber b is fitted with a baffle plate b¹
for the purpose of causing the inlet current from e to sweep over the surface of the
bottom of the chamber b which is exposed to the full force of the flame; by g³ the
heated air now flows into the chamber c where warming food or cooking or heating
of water can be accomplished in suitable vessels.
A lid to the chamber c is made to lift off entirely or may be hinged to the case.
An outlet is arranged by which the amount of warm air passing out into the
apartment can be regulated and also the amount required to be retained in the
chamber c and it is also convenient to have valves in the inlet pipe e and outlet
pipe to regulate the inflow of air and the outlet of the products of combustion.

page_text: This chamber or hot closet c is an important feature of the Invention as nothing
but pure warm air can enter it.
To prevent the too rapid course of the heated air and products of combustion to
the outlet pipe f the angular baffle plate y' g is fitted thus causing the air to
circulate round the chamber c.
The details of the drawing for the burner shew the inclined plane by which the
burner is drawn down and out below the level of the bottom of the stove lighted
and pushed up above the level of the bottom of the stove and a mica or glass
window Fig 1 may be fitted to observe the condition of the flame of the burner.
In the drawing Fig 1. the burner is shewn in situ k and drawn down to be
lighted in Fig 4.
Having now described and particularly set forth the nature of the said Invention
and the manner of carrying the same into effect I would have it understood that
what I claim is :-
1st The herein described gas stove, combining, a small highly heated chamber, a
comparatively large cooking or warming chamber, and an outer envelope without
opening for escape of the products of combustion except as set forth, substantially
as described.
2nd The arrangement for bringing the burner down for lighting and pushing it
up when lighted acting in the manner set forth for the purposes described.
In witness whereof I the said Archibald Henry Plantagenet Stuart Wortley
have hereunto set my hand and seal this Fifteenth day of February in the
year of our Lord One thousand eight hundred and eighty three.
TI D CUTITA DE WORTIV
Gol