IMPROVEMENTS IN GAS HEATING STOVES to be as follows:-
Year: 1884

page_text: I HENRY JOHN DAVIS of 200 Camberwell Road, in the County of Surrey, Gas
Stove Manufacturer do hereby declare the nature of my said invention for
"IMPROVEMENTS IN GAS HEATING STOVES to be as follows:-
"
This invention has for its object the construction of gas heating stoves in such
a manner as to ensure economy in the consumption of gas, to prevent the products
of combustion escaping in the room, and to avoid the liability to danger consequent
upon a back draught extinguishing the gas flames.
The invention consists of an inner rectangular or other suitably shaped chamber
This chamber is enclosed
closed at top, sides, back and front and open at bottom
in a casing, a space between it and the wall of the chamber existing nearly all
round it. The casing is surrounded by a jacket closed both at top and bottom, but
communicating with the space just mentioned by an opening all round at or near
the top which leads to a space between the said jacket and the casing. At the
lower part of the jacket, or in some other convenient position an outlet is formed,
and connected to a pipe leading to the outer air, into a chimney or other convenient
place exterior to the room. Within the inner chamber there is a flat pipe, or
conduit which is a parallelogram in horizontal section, but takes a zigzag form in
vertical section and elevation. The lower part of this conduit is in communication
with a fresh air inlet open to the lower part of the room, or to the air outside the
house, while the upper part is open to the atmosphere in the apartment, a perforated
screen only intervening.-The gas burner or burners, either ordinary, or those
known as "atmospheric" are placed at or near the bottom of the stove within the
inner chamber, and the result in action is, that when the gas is lighted, the flat
tube and consequently the fresh air within it are heated by the gas, and as the
warm air ascends to the top and enters the room its place is supplied by fresh air
from the inlet, to be in its turn warmed and emitted into the apartment. The hot
products of combustion after filling the inner chamber and heating the flat tube
descend and then flow upwards between the casing and the inner chamber, and
after arriving at the top, descend between the casing and the jacket until they reach
the outlet. A large proportion of the heat existing in the products are absorbed
by the jacket in the course of their flow and is radiated by it, thus increasing the
temperature of the place to be warmed.

page_text: The stove may be made of any convenient form; and simply as described, or its
height may be extended, the lower part of the front made open, and being provided
with a back of bright corrugated metal may thus possess the additional advantage.
common to those stoves known by the name of cheerful."
"
Dated this Tmento fifth dow of T1001
I, HENRY JOHN DAVIS of 200 Camberwell Road in the County of Surrey, Gas
Stove Manufacturer do hereby declare the nature of my invention for "IMPROVE-
MENTS IN GAS HEATING STOVES" and in what manner the same is to be performed,
to be particularly described and ascertained in and by the following statement
reference being had to the accompanying drawings and to the letters and figures
marked thereon, that is to say :—
This invention has for its object the construction of gas heating stoves in such
a manner as to ensure economy in the consumption of gas, to prevent the products
of combustion from escaping into the room, and to avoid the liability to danger
consequent upon a back draught extinguishing the gas flames.
In order that the invention may be more easily understood drawings are attached
hereto of which the following is a description. Fig I is a front sectional elevation
through A, B of Fig 2,-and Fig 2 is a side sectional elevation through CD of
Fig 1. In each of the views similar letters refer to the same parts.
The invention consists of an inner rectangular or other suitably shaped chamber E,
closed at top, sides, back and front and open at the bottom. This chamber is
enclosed in a casing F, a space G between it and the wall of the chamber existing
nearly all round it. The casing is surrounded by a jacket H closed both at top
and bottom, but communicating with the space just mentioned by an opening all
round at or near the top which leads to a space between the said jacket and the
casing. At the lower part of the jacket, or in some other convenient position an
outlet I is formed, and connected to a pipe leading to the outer air, into a chimney,
or other convenient place exterior to the room. Within the inner chamber there is
a flat pipe or conduit J, which is a parallelogram in horizontal section, but takes a
zigzag form in vertical section and elevation.--The lower part of this conduit is in
communication with a fresh air inlet K, open to the lower part of the room or to
the air outside the house, while the upper part is open to the atmosphere in the
apartment, a perforated screen L only intervening. The gas burner or burners,
either ordinary or those known as "atmospheric," the pipe bearing which is shown
in dotted lines at M, are placed at or near the bottom of the stove within the inner
chamber, and the result in action is, that when the gas is lighted the flat tube J
and consequently the fresh air within it are heated by the gas and as the warm air
ascends, in the direction of the arrows, to the top and enters the room its place is
supplied by fresh air from the inlet K to be in its turn warmed and emitted into

page_text: the apartment. The hot products of combustion after filling the inner chamber E
and heating the flat tube descend and then flow in the course, indicated by the
arrows, upwards between the casing and the inner chamber, and after arriving at
the top descend between the casing and the jacket until they reach the outlet I.
A large proportion of the heat existing in the products are absorbed by the jacket.
in the course of their flow and is radiated by it, thus increasing the temperature of
the place to be warmed.
The stove may be made of any convenient form and simply as described, or its
height may be extended, the lower part of the front made open and being provided
with a back of bright corrugated metal N as shown in the drawing, may thus
possess the additional advantage common to those stoves known by the name of
"cheerful."
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed; I declare that what
I claim is
The construction of gas heating stoves with a rectangular zigzag tube arranged
as herein described and shown on the drawings.