Year: 1897

page_text: We, JOHN LANGFIELD, of 10, College Land, Manchester, in the County of
Lancaster, Engineer, and GEORGE HENRY KENWORTHY, of Hurst Hall, Ashton-under-
Lyne, in the aforesaid County, Spinner and Manufacturer, do hereby declare the
nature of this invention to be as follows:-
This invention relates to improvements in gas stoves for heating air, and consists
in the combination with a Bunsen or other suitable gas burner of a suitable closed
heating chamber in the lower part of which the burner is fitted, the said chamber
also being provided with air tubes communicating at the top of the chamber with the
room or place to be supplied with hot air and at the bottom with a fresh air supply,
one or more of the air tubes being provided with a small internal tube kept
continually supplied with water; the heating chamber is also provided with an outlet
for the heated products of combustion at such a point in its height as to leave a
considerable column of heat which practically remains at a constant temperature;
the heating chamber is also provided at the upper part with a safety valve, so that
in case of the gas being turned on and not ignited until the mixture of air and
gas in the heating chamber becomes explosive, the safety valve will relieve the
pressure in the heating chamber and prevent bursting of the same and the issuing of
flame from the stove.
By this means the fresh air supplied to the tubes becomes heated therein and as
it expands rises into the room or place to be heated. And the inner tube (or tubes)
containing water as above described becomes (or become) highly heated by the hot
air in the tube (which in its turn has been heated by the gas), and emits (or emit)
steam into the hot air, thus inoistening the same in the proportion required by the
heat of the air, which absorbs it.
The air heating chamber may be made ornamental or fitted into an ornamental
casing with a gridded perforated or ornamental openwork top.
This apparatus is very applicable to the heating of small spaces such as green-
houses and the like.

page_text: We, JOHN LANGFIELD, of 23, Victoria Buildings, St. Mary's Gate (formerly of 10,
College Laud), Manchester, in the County of Lancaster, Engineer, and GEORGE HENRY
KENWORTHY, of Hurst Hall, Ashton-under-Lyne, in the aforesaid County, Spinner
and 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 improvements in gas stoves for heating air, and consists
in the combination with a Bunsen or other suitable gas burner of a suitable closed
heating chamber in the lower part of which the burner is fitted, the said chamber
also being provided with air tubes communicating at the top of the chamber with
the room or place to be supplied with hot air and at the bottom with a fresh air
supply, one or more of the air tubes being provided with a small
internal tube kept continually supplied with water; the heating chamber
is also provided with an outlet for the heated products of combustion at such a point
in its height as to leave a considerable column of heat which practically remains at a
constant temperature; the heating chamber is also provided at the upper part with
a safety valve, so that in case of the gas being turned on and not ignited until the
mixture of air and gas in the heating chamber becomes explosive, the safety valve
will relieve the pressure in the heating chamber and prevent bursting of the same
and the issuing of flame from the stove.
Our invention will be fully understood on reference to the accompanying sheet of
drawings and the following explanation thereof.
Fig. 1 is a transverse vertical section, Fig. 2 a longitudinal vertical section, Fig. 3
is a horizontal section of a gas stove made according to our invention in the form
which we prefer.
a is the Bunsen burner, b is a grate or space which we prefer to provide above
the burner a filled with pieces of asbestos rendered incandescent when the gas is
alight, c is the chamber heated by the burner a and the incandescent
asbestos.
The air pipes d pass from top to bottom of the chamber c one of the pipes d
is shown provided with a water piped supplied with water from a small
cistern d². The water in the pipe d' is heated by the heating of the air in the
corresponding pipe d.
c (Fig. 1) is the outlet for products of combustion from the chamber c above
which it will be seen is a considerable space for the accumulation of a column of
heat which remains at practically a constant temperature, c² is a short pipe or
recess at the top of the chamber c covered by a loose lid which acts
as a safety valve in cases of explosion on first lighting the gas
described.
as above
By this means the fresh air supplied to the tubes d becomes heated therein and as
it expands rises into the room or place to be heated. And the inner tube d¹ (or
tubes) containing water as above described becomes (or become) highly heated by the
hot air in the tube d (which in its turn has been heated by the gas), and emits (or
emit) steam into the hot air, thus moistening the same in the proportion required by
the heat of the air, which absorbs it.
The air heating chamber c may be made ornamental or fitted into a casing e
provided with tiles e¹ as shewn (or otherwise ornamented) and with a gridded per-
forated or ornamental openwork top 2, beneath which is preferably fitted a fine sieve

page_text: or screen for arresting dirt or impurities in suspension in the heated air rising
from the tubes d.
This apparatus is very applicable to the heating of small spaces such as green-
houses and the like.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed 1 declare that what I
claim is
An improved gas stove having combined therein the improvements substantially
as herein before described.