Year: 1894

page_text: Date of Application, 10th Nov., 1894
Complete Specification Left, 10th Aug., 1895-Accepted, 14th Sept., 1895
I, THOMAS HADFIELD of 12 Cromwell Street, in the Borough of Nottingham,
Medical Baths Manager, do hereby declare the nature of this invention to be as
follows:-
This invention relates to gas stoves for general heating purposes.
The body of the stove is formed by an external casing, which may be of any
suitable shape. Within this casing is an internal reduced chamber or casing
provided with an opening which fits close up to or is connected by a passage to a
corresponding opening in the front of the exterior casing, the opening in the
exterior casing may be provided with a door which is preferably fitted with glass
mica or other transparent or semi-transparent material so that the combustion of
the gas which takes place within the interior chamber may be visible.
Within the interior chamber are preferably two or more atmospheric gas
burners, each provided with an independent gas supply so that one, two, or more
may be employed according to the heat required.
When two burners are employed the first is preferably formed with a row of
straight jets. and the second with two rows of jets arranged at each side of the
former, so that the second has double the heating capacity of the first burner, the
several rows of jets may also be arranged one above the other, preferably in an
inclined plane.
The atmospheric burners are preferably constructed in the following manner.
The nozzle of the gas inlet is carried beyond the openings in the outer casing of
the burner for the admission of atmospheric air two of which are formed one on
each side.
At the point where the nozzle of the gas inlet delivers the gas the interior
diameter of the outer casing is reduced so as to form a conical opening into the
open end of which the nozzle projects and delivers the gas, by this means the gas
and air are more thoroughly mixed, and a better supply of air is obtained.
Air is supplied to the inner chamber through an opening in the bottom com-
municating with the under side of the stove, and the products of combustion are
delivered from the upper end of the chamber into a coil or annular chamber above
the inner chamber but within the exterior casing. If an annular chamber is
employed it is fitted with partitions arranged so that the products of combustion
have to pass all round the chamber one or more times before they reach the outlet
communicating with the chimney.
The air space between the inner chamber and exterior casing may be divided
by a horizontal partition into three or more chambers, in the upper one of
which is the coil or annular chamber through which the products of combustion
pass.
:
The lower chamber is provided with an air inlet on the underside of the stove
for the admission of air, which is heated and rises through openings in the horizontal
partitions from one chamber to another until it reaches the upper chamber, from
this chamber it is delivered through an opening provided with a grating into the
atmosphere again, highly heated.
The lower chambers may be provided with vertical partitions and the openings
in the horizontal partitions arranged so that the air, in order to pass from one
chamber to another, must pass round the inner chamber.

page_text: The air inlet to the heating chambers may if desired be connected by a suitable
conduit to the exterior of the building so that the stove may constantly deliver
fresh air into the room in which it is placed.
Dated this 10th day of November 1894.
improvements in or relating to Gas Stoves.
I, THOMAS HADFIELD, of 12 Cromwell Street, in the Borough of Nottingham,
Medical Baths Manager, 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 more especially, to gas, stoves for, heating rooms or
apartments.
.
It will be best, understood by reference, to the accompanying drawings, in
which
Fig. 1 is a front, elevation, and
Fig. 2. a plan partly in section, of a store constructed according to my invention.
Fig. 3. is a vertical section. taken centrally, on Fig. 1 and
Figs. 4, 5, and 6 are horizontal sections taken on lines X X, Y Y, and Z Z,
respectively. of Fig. 1.
Like letters indicate like, parts throughout the drawings.
The body of the stove is formed by an external casing A which may be of any
suitable shape in plan, the back A¹ being preferably secured to the front portion
by screws or bolts. Within the casing is a combustion chamber B provided with
openings in the front and base which fit up to corresponding openings in the front
of the casing. A and base plate C respectively.
The opening in front of the, casing. A may be extended beyond the face of the
casing by a flange or rib A2 on the casing A and is fitted with a door D
preferably provided with a panel D' or panels of glass, mica, or other transparent
or semi-transparent material, so that the combustion, within the chamber may be
visible.
In the opening at the base of the combustion chamber B, are arranged preferably
three atmospheric gas burners E (see Figs. 3 and 4.) each provided with an
independent gas supply pipe E', so that one, two or the whole of the burners may
be employed according to the heat required.
The nozzle E of each gas inlet (see Fig. 3.) is tapered and projects into the
open end E³ of the burner E, and the interior of this end E3 is formed conical, the
smaller diameter being beyond the point, of the gas delivery.
By this arrangement the gas and air are more thoroughly. mixed and a more
perfect combustion is obtained, than. with atmospheric burners of the, usual
construction.
The, products, of combustion. escape from the combustion,, chamber, B. (see
Figs. 3.5 and 6.) through the opening B¹ into a secondary chamber F. This
chamber is partially divided with a baffle plate F. and on the reverse side of this
plate, to, the inlet. B is an outlet F2 (see Fig. 6) which may be placed either in.
direct communication with a flue, by means of a pipe, or in communication with the
exterior of the building in the manner hereinafter described.
In the former case the outlet F2 may if desired be formed in the back or top of
the chamber F instead of in the base as shown.
The air space between the walls of the chamber B and outer casing A is divided
by a horizontal partition G, a second partition H is placed level with the bottom

page_text: of the secondary chamber F, and a third H¹ level with the top, the two
partitions H, Hi if desired, being formed integrally with the chamber F as
shewn.
Air is admitted into the lower part of the stove through an opening I (see
Fig. 4) formed in the base piate C, this opening may be connected by means of a
pipe with the exterior of the building, so that a supply of fresh air may
constantly be obtained. After passing round the back of the combustion chamber B
the air passes through an opening G1 (see Fig. 5) in the horizontal partition G,
and after again passing round the back of the combustion chamber in the reverse
direction it passes through an opening H2 in the partition H (see Fig. 6). The
air then passes once round the front of the secondary chamber F and escapes
through an opening H³ (see Fig. 2) in the partition H' into the chamber J.
From the chamber J the air is delivered through the grating J¹ into the
apartment in which the stove is fixed, in a highly heated state.
The before mentioned outlet F2 from the secondary chamber F may be connected
with the exterior of the building by a pipe K carried down to the base of the
stove, through the air inlet I, and along the interior of the pipe I¹ to an uptake on
the exterior of the building and the products of combustion thus led away.
With this arrangement, the heat from the pipe K raises the temperature of the
air as it passes along the air inlet pipe I¹ to the stove.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is:-
1. In a gas stove the combination with a closed combustion chamber such as B
and one or more burners E of a casing such as A enclosing the said chamber and
forming an enclosed air space between the walls of the chamber and casing
substantially as described and illustrated in the accompanying drawings.
2. In a gas stove the combination with a combustion chamber such as B one or
more burners E and a secondary chamber such as F of a casing such as A enclosing
the chambers B and F and forming an enclosed air space between its own walls
and those of the enclosed chambers substantially as described and illustrated in the
accompanying drawings.
3. In a gas stove the combination with a combustion chamber such as B one or
more burners E chamber such as F and casing such as A of horizontal
partitions G H H' substantially as and for the purpose described and illustrated in
the accompanying drawings.
4. In a gas stove an atmospheric burner with a conical opening or air inlet such
as E3 and a tapered gas nozzle such as E' projecting into the said opening,
substantially as described and illustrated in the accompanying drawings.
5. In a gas stove carrying the products of combustion away through a pipe K
arranged in the interior of the air supply pipe 1' substantially as described and
illustrated in the accompanying drawings.
6. The combination and arrangement of parts constituting the complete stove
substantially as herein described and illustrated in the accompanying drawings.
Dated this 9th day of August 1895.
THOMAS HADFIELD.
Boult & Wade,
Agents for the Applicant.