Year: 1885

page_text: I EDGAR ALDOUS, of 2 Elmhurst, Upton, in the county of Essex, Sanitary
Engineer do hereby declare the nature of this invention to be as follows"
.
This invention relates to the construction of an improved hot air stove for econo-
mically heating buildings, rooms, greenhouses, conservatories, and the like by means
of gas and without the air being vitiated by the products of combustion.
The improved stove or apparatus consists of two concentric chambers (preferably
cylindrical) closed at both ends and placed horizontally, a space being left between
the two cylinders.
From the inner cylinder pass two tubes one serving as an air inlet for the supply
of air to the gas burner in the interior of the inner cylinder the gas being supplied
by a suitable pipe. The other tube serves for the discharge of the products of
combustion. The outer cylinder is in communication with the outside air by a
suitable supply tube, a deflecting plate or plates being provided in the space
between the two cylinders to cause the air to pass around the space between the
two cylinders before it is discharged into the room or chamber to be heated.
By this construction of apparatus the gas in the inner chamber being lighted
through a suitable opening, air for the combustion will be introduced through the
hereinbefore described tube and the products of combustion will be discharged as
above described; air will also pass into the space between the two chambers and
will be caused: by the deflecting plate or plates to pass over and around the inper
cylinder and will thereby become heated without any contact with the gas or
products of combustion and will be discharged in a pure heated condition into the
room, chamber or otherwise to be beated. I sometimes provide the bottom of the
outside cylinder with an open water retainer which water becomes heated and as
evaporation takes place moisture is taken up by the heated air passing over it by
which means the air discharged into the room is both heated and moistened.
?
Dated the 4th day of November 1885

page_text: I EDGAR ALDOUS, of 2 Elmhurst, Upton, in the county of Essex, Sanitary
Engineer, 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 the construction of an improved hot air stove for
economically beating buildings, rooms, greenhouses, conservatories, and the like
by means of gas and without the air being vitiated by the products of
combustion.
C
The improved stove or apparatus consists of two concentric chambers (preferably
cylindrical) closed at both ends and placed horizontally, a space being left between
the two cylinders.
From the inner cylinder pass two tubes one serving as an air inlet for the
supply of air to the gas burner in the interior of the inner cylinder the gas being
supplied by a suitable pipe. The other tube serves for the discharge of the
products of combustion. The outer cylinder is in communication with the outside
air by a suitable supply tube, a deflecting plate or plates being provided in the
space between the two cylinders to cause the air to pass around the space between
the two cylinders before it is discharged into the room or chamber to be heated.
I sometimes provide the bottom of the outside cylinder with an open water
retainer which water becomes heated and as evaporation takes place moisture is
taken up by the heated air passing over it by which means the air discharged into
the room is both heated and moistened.
In order to enable my invention to be fully understood I will proceed to describe
the same by reference to the accompanying drawing in which figure 1 represents a
vertical section and figure 2 a front elevation of a hot air stove or heating apparatus
constructed according to my invention the stove being shewn without a water
retainer; figure 3 is a horizontal section on line A, B of figure 1; figure 4 is a
plan of the underside of the stove; figure 5 is a similar view to figure 1, but
shewing the stove provided with a water retainer. Similar letters in all the figures
represent similar parts.
Referring to figures 1, 2 and 3 a and b, represent the two concentric chambers
closed as shewn at both ends and placed horizontally; c, is the space between the
two cylinders a and b; d and e, are the two tubes passing from the inner cylinder a,
to the outside of the building; f, is the gas burner in the interior of the inner
cylinder a, and g is the pipe for supplying the same with gas the said pipe passing
downwards through an opening a¹, in the bottom b', of the stove; the tube d,
serving as an air inlet for the supply of air to the gas burner f, and the tube e,
serving for the discharge of the products of combustion; h, is the tube passing
from the outer cylinder b, to the outside of the building and forming a communi-
cation between the outside air and the said cylinder; i, is the deflecting plate in
the space c, between the cylinders a and b, whereby the air entering through the
tube h, is prevented from passing direct into the room or chamber through the

page_text: discharge tube j, but is caused to pass around the space c, between the cylinders a,
and b, before it is discharged through the said tube into the room or chamber to be
heated.
By this construction of apparatus the gas in the inner chamber a, being lighted
through a suitable opening (not shewn in the drawing) air for the combustion will
be introduced through the tube d, and the products of combustion will be dis-
charged through the tube e, as above described; fresh air will also pass through
the tube h, into the space c, between the two chambers a, and b, and will be caused
by the deflecting plate i, to pass over and around the inner cylinder a, and will
thereby become heated without any contact with the gas or products of combustion
and will be discharged in a pure, heated condition through the tube j, into the
room, chamber or otherwise to be heated.
The stove or heating apparatus shewn in figure 5 is similar to that herein before
described and illustrated in figures 1 to 4 except that the bottom of the outside
cylinder b, is provided with a depression forming an open water retainer k, for
moistening the air in the manner hereinbefore referred to as it travels over the same
in passing through the space c.
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:
1. In a hot air stove or heating apparatus the employment of two concentric
chambers or cylinders communicating with the outer air the inner cylinder being
heated by means of gas and the space between the cylinders communicating with
the room or chamber to be heated substantially as and for the purpose hereinbefore
described and represented in the accompanying drawing.
2. The use in combination with a hot air stove or heating apparatus constructed
as herein described of a deflecting plate such as i, as and for the purpose set forth.
3. The combination with a stove or heating apparatus constructed as claimed in
claim 1 of a water retainer such as k, substantially as and for the purpose herein-
before described and illustrated in figure 5 of the accompanying drawing.
4. The improved hot air stoves or heating apparatus herein before described and
represented in the various figures of the accompanying drawing.
G. F. REDFERN,
Agent for the Applicant.