IMPROVEMENT IN THE CONSTRUCTION OF STOVES FOR WARMING AND VENTILATING PURPOSES
Year: 1884

page_text: I FRANCIS THOMAS BOND, of Gloucester, in the county of Gloucester, Doctor
of Medicine, do hereby declare the nature of my invention for AN IMPROVEMENT
IN THE CONSTRUCTION OF STOVES FOR WARMING AND VENTILATING PURPOSES to
be as follows:
The improvement to which this invention refers consists in the use of fluted
or corrugated sheets of metal in such a way that by the application of two such
corrugated sheets to one another, or of a sheet of plane metal to a sheet of
corrugated metal, the corrugations of such sheets are practically converted into tubes,
having in the first case a circular, and, in the second case, a semicircular section.
By the appropriate arrangement of one or more corrugated sheets thus treated,
so as to form one or more series of tubes, in the manner hereinafter described, and
by leading the products of combustion from a gas burner or other source of heat
into the tubes so formed, it is possible to extract a very large portion of the
heat of such products, which is thus taken up by the inner side of the metal
walls of the tubes, and will be given off by them again into the air with which
their outer side happens to be in contact; the products, with their residual heat,
being ultimately led away out of the arrangement by a flue in the ordinary way.
For the purpose of this invention I construct a cylinder of corrugated sheet-
iron or other metal, the corrugations being arranged so as to run vertically, and
the chamber being open at either end.
I then construct a hollow metal cap or cover so that it can be adapted to fit
by its border in an air-tight manner to the top of the said corrugated cylinder
when placed vertically; and in the centre of the top of this cover I make an
aperture, and at the side of the cover I make a second aperture. Before
adapting the top of the said cover to the corrugated cylinder I construct a second
cylinder of either plane or corrugated sheet-metal, a little less in height than
the first cylinder, and closed at either end, so as to form a drum, but having
in the centre of each end of the drum an aperture. This drum I make of such
a size that it can be just fitted inside the first cylinder, and in such a way that
if the wall of the drum be plane it shall by apposition against the interior surface
of the corrugated wall of the cylinder convert the corrugations into a series of
vertical tubes of a semicircular section, and that if the wall of the drum be

page_text: corrugated, the corrugations of the two cylinders shall by apposition to one
another be practically converted into a series of tubes. When the drum bas
been thus fixed in position inside the outer cylinder I attach the cap or cover,
which I have hereinbefore described, in an air-tight way to the top of the said
cylinder, & I connect the aperture in the top of the drum with the aperture in
the top of the cap in an air-tight way, by means of a tube.
I also connect a tube with the aperture in the bottom of the drum and I carry
this tube through the wall of the outer cylinder below the level of the drum, so
as to bring its free end into connection with the outer air, for the purpose of
supplying a stream of air to the inside of the drum. To the aperture in the side
of the cap or cover I attach a flue for the purpose of carrying away the products
of combustion. The stove thus constructed may be made to stand directly on the
ground, or it may be raised above the ground by means of three or more feet or
legs. Beneath the drum I place a gas-burner, oil-lamp or other convenient source
of heat, the products of the combustion of which will find their way upwards, and
after impinging against the lower end of the drum will be deflected outwards to
the lower ends of the series of tubes formed as hereinbefore described, and will
then pass up through these tubes into the chamber at the upper part of the stove,
formed by the cover or cap, & out from thence into the flue by the aperture in
the side thereof. The heat abstracted from the products of combustion in their
passage through the tubes will be given off by the outer surface of the tubes into
the air surrounding the stove, and by the inner into the air in the interior of the
drum, whence it will be carried upwards into the air of the room by the current
which will thus be created through the drum from the aperture at the bottom to
that at the top. If the aperture at the bottom of the drum be connected with the
air outside the room the stove will thus become a very convenient means of
warming the air as it is introduced into the room thereby promoting efficient
ventilation.
Dated this first day of January 1884.

page_text: I FRANCIS THOMAS BOND of Gloucester in the county of Gloucester, Doctor
of Medicine, do hereby declare the nature of my invention for AN IMPROVEMENT
IN THE CONSTRUCTION OF STOVES FOR WARMING & VENTILATING PURPOSES and
in what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement:-
The Improvement to which this invention refers consists in the use of fluted
or corrugated sheets of metal in such a way that by the application of two such
corrugated sheets to one another, or of a sheet of plane metal to a sheet of
corrugated metal, the corrugations of such sheet are practically converted into
tubes, having in the first case a circular, and in the second a semicircular section:
By the appropriate arrangement of one or more corrugated sheets thus treated so
as to form one or more series of tubes, in the manner hereinafter described, and by
leading the products of combustion from a gas burner or other source of heat into
the tubes so formed, it is possible to extract a very large portion of the heat of
such products, which is thus taken up by the inner side of the metal walls of the
tubes and will be given off by them again into the air with which their outer side
happens to be in contact; the products, with their residual heat, being ultimately
led away out of the arrangement by a flue in the ordinary way.
For the purpose of this invention I construct a cylinder of corrugated sheet
iron or other metal, the corrugations being so arranged as to run vertically from
the top to the bottom of the cylinder, and the cylinder being open at either end.
I then construct a hollow metal cap or cover so that it can be adapted to fit by its
border in an air tight manner to the top of the said corrugated cylinder when
placed vertically; and in the centre of the top of this cover I make an aperture,
and at the side of the cover I make a second aperture. Before adapting the said
cover to the top of the corrugated cylinder I construct a second cylinder of either
plane or corrugated sheet metal, a little less in height than the first cylinder, and
closed at both ends so as to form a drum, but having in the centre of each end of
the drum an aperture.
This drum I make of such a size that it can be just fitted inside the first
cylinder, and in such a way that if the wall of the drum be plane it shall by
apposition against the interior surface of the corrugated wall of the cylinder
convert the corrugations into a series of vertical tubes of a semicircular section,
and that if the wall of the drum be corrugated the corrugations of the two
cylinders shall by apposition to one another be practically converted into a series
of tubes. When the drum has been thus fixed in position inside the outer cylinder
I attach the cap or cover, which I have herein before described, in an airtight way
to the top of the said cylinder, and I connect the aperture in the top of the drum
with the aperture in the top of the cap in an airtight way by means of a tube.
I also connect a tube with the aperture in the bottom of the drum, and I carry
this
tube through the wall of the outer cylinder below the level of the drum, so as to bring
its free end into connection with the outer air for the purpose of supplying a
stream of air to the inside of the drum. To the aperture in the side of the cap
or cover I attach a flue for the purpose of carrying away the products of com-
bustion. The Stove thus constructed may be made to stand directly on the
ground, or it may be raised above the ground by means of three or more feet or
legs.
Beneath the drum I place a gas burner, oil lamp or other convenient source
of beat, the products of the combustion of which will find their way upwards, and
after impinging against the lower end of the drum will be deflected outwards to

page_text: the lower ends of the series of tubes formed as hereinbefore described, and will
then pass up through these tubes in to the chamber at the upper part of the
stove formed by the cover or cap, and out from thence into the flue by the aperture
in the side thereof. The heat abstracted from the products of combustion in their
passage through the tubes will be given off by the outer surface of the tubes into
the air surrounding the stove, and by the inner into the air in the interior of the
drum, whence it will be carried upwards into the air of the room by the current
which will thus be created through the drum from the aperture at the bottom to
that at the top. If the aperture at the bottom of the drum be connected with the
air outside the room the Stove will thus become a very convenient means of
warming the air as it is introduced into the room, thereby promoting its efficient
Ventilation.
In order more clearly to describe the nature of my invention I have appended
hereto the following drawings thereof:
Figure I represents a vertical section through the middle of the stove constructed
as hereinbefore described, in which A is the outer corrugated cylinder, B the drum
inside the cylinder, C the tube connecting the upper aperture of the drum with the
corresponding aperture in the cap G, the other aperture of which H serves as a
Vent for the products of combustion. F is a loose circular cover with holes in its
margin, for the purpose of protecting the interior of the drum from dust. D is the
lower aperture of the drum which is connected by a tube through the aperture E
with the outer air. K is the burner,
Figure II represents a horizontal section of the stove through the line a, b. in
the former drawing, and shews the way in which the corrugations of the outer
cylinder are converted into tubes of semicircular section when the drum is
constructed of plane metal. The same effect would be produced by placing the
plane cylinder outside and constructing the drum of corrugated metal.
Figure III is a similar section to Figure II but shewing how increased metallic
surface is obtained by constracting the drum of corrugated metal like the cylinder,
and adapting the one to the other so as to produce tubes of cylindrical section.
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 a stove for heating and ventilating purposes in which
the products of combustion from a gas burner, oil lamp, or other convenient
source of heat are made to pass through a series of vertical metallic tubes produced
by the apposition to one another of concentrically corrugated cylinders of sheet
metal, or of a corrugated and a plane cylinder, substantially in the manner and for
the purpose herein before described.
Dated this twenty second day of September 1884. ·