IMPROVEMENTS IN APPARATUS FOR HEATING AIR IN EITHER RAPID OR MODERATELY RAPID MOTION FOR ANY PURPOSES REQUIRING A STRONG OR MODERATE BLAST OF HOT OR MODERATELY HEATED WIND"
Year: 1881

page_text: LETTERS PATENT to George Seagrave, of Wellington Buildings, Chelsea
Bridge, in the County of Middlesex, and Samuel Bourne Bevington, of the
Neckinger Mills, Bermondsey, in the County of Surrey, for an Invention of
"IMPROVEMENTS IN APPARATUS FOR HEATING AIR IN EITHER RAPID OR
MODERATELY RAPID MOTION FOR ANY PURPOSES REQUIRING A STRONG OR
MODERATE BLAST OF HOT OR MODERATELY HEATED WIND"
PROVISIONAL SPECIFICATION left by the said George Seagrave and
Samuel Bourne Bevington at the Office of the Commissioners of Patents on
the 23rd February 1881.
GEORGE SEAGRAVE, of Wellington Buildings, Chelsea Bridge, in the County of
Middlesex, and SAMUEL BOURNE BEVINGTON, of the Neckinger Mills, Bermondsey,
in the County of Surrey. "IMPROVEMENTS IN APPARATUS FOR HEATING AIR
IN EITHER RAPID OR MODERATELY RAPID MOTION FOR ANY
REQUIRING A STRONG OR MODERATE BLAST OF HOT OR MODERATELY HEATED
WIND."
PURPOSES
The object of our Invention is to contruct an efficient apparatus for economically
heating large volumes of ordinary or mixed air while in rapid or moderately
rapid motion to the required degree of heat for drying, evaporating, volatalizing,
disinfecting, bleaching, or. deodorizing, or ventilating, or heating houses or
hospitals, the latter either with pure air or air charged with any desired medicated
vapours.
"
For the purpose of carrying out our Invention we construct a chamber or casing
of any suitable material, within any convenient part of which we arrange a furnace
of such form and suitable capacity as to attain the best results from the fuel, heat,
and products of combustion."
The heated gases thus produced pass through and around a series of double tubes
made of any desired heat conducting material and of any shape or form arranged
as desired within the said chamber or casing.
In order to check the escape of heat from the furnace up the up-take or chimney
we cause the draught to be so regulated by baffle plates as to enable the utmost
amount of heat to be extracted on its passage.

page_text: The double set of tubes may be so arranged as to give an archimedean screw
course to the air being driven or drawn through and around them, and their
respective diameters may be such as to give an annular space through which the air
may be driven by a fan or blower or drawn by an exhaust.
The tubes are provided at their extremities with equalizing and conducting
chambers or partitions respectively for the cold and heated air driven or drawn, as
above described, as also by the draught of the chimney.
The chamber or casing is provided with removable plugs or doors to provide
for the removal of soot or other possible deposits both from the inside and outside
of the tubes.
By our arrangement of apparatus, herein described, with a very small propor-
tionate amount of fuel large volumes of air in motion, forced either by a fan or
blower or drawn through the apparatus by an exhaust, can be very quickly heated
to almost any required degree.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said George Seagrave and Samuel Bourne Bevington in the Great
Seal Patent Office on the 23rd August 1881.
GEORGE SEAGRAVE, of Wellington Buildings, Chelsea Bridge, in the County of
Middlesex, and SAMUEL BOURNE BEVINGTON, of the Neckinger Mills, Bermondsey,
in the County of Surrey. "IMPROVEMENTS IN APPARATUS FOR HEATING AIR
PURPOSES
IN EITHER RAPID OR MODERATELY RAPID MOTION FOR ANY
REQUIRING A STRONG OR MODERATE BLAST OF HOT OR MODERATELY HEATED
WIND."
The object of our Invention is to construct an efficient apparatus for economically
heating large volumes of ordinary or mixed air while in rapid or moderately rapid
motion to the required degree of heat for drying, evaporating, volatalizing,
disinfecting, bleaching, or deodorizing, or ventilating, or heating houses or
hospitals, the latter either with pure air or air charged with any desired medicated
vapours.
For the purpose of carrying out our Invention we construct a chamber or casing
of any suitable material, within any convenient part of which we arrange a furnace
of such form and suitable capacity as to attain the best results from the fuel, heat,
and products of combustion.
The heated gases thus produced pass through and around a series of double tubes
made of any desired heat conducting material and of any shape or form arranged
as desired within the said chamber or casing.
'
In order to check the escape of heat from the furnace up the uptake or chimney
we cause the draught to be so regulated by baffle plates as to enable the utmost
amount of heat to be extracted on its passage.
The double set of tubes may be so arranged as to give an archimedean screw
course to the air being driven or drawn through and around them, and their
respective diameters may be such as to give an annular space through which the
air may be driven by a fan or blower or drawn by an exhaust.
The tubes are provided at their extremities with equalizing and conducting
chambers or partitions respectively for the cold and heated air, driven or drawn as
above described, as also by the draught of the chimney.
The chamber or casing is provided with removable plugs to provide for the
removal of soot or other possible deposits both from the inside and outside of the
tubes.
By our arrangement of apparatus herein described with a very small propor-
tionate amount of fuel large volumes of air in motion forced either by a fan or
blower or drawn through the apparatus by an exhaust, can be very quickly heated
to almost any required degree.
Our Invention, as herein set forth, is clearly represented in the annexed Drawings,
in which Figure 1 is a longitudinal section of a complete apparatus, and Figure 2 a
transverse section through the line 1, 2, of Figure 1, Figure 3 being a similar
section through the line 3, 4, of Figure 1.
A is a furnace in brickwork or other setting, and B, C, a series of tubes arranged
in boxes D, E, in a superposed manner and one within the other, that the heat and
products of combustion may impinge against and circulate in the chamber F among
the tubes B, B, to heat them before the said heat and products of combustion can
pass under the lower of the rear boxes into the chamber G, which compels the
heat and products of combustion to pass through the insides of the tubes C, C,
under the partition H, and return through the inside of the series of tubes C¹, C¹,
to the chamber J above the partition H on their way to the uptake or
chimney K.

page_text: The series of tubes C and C¹ are arranged within the tubes B, and are of greater
length, so that their ends are held in the outer sides of the boxes D, E, and the
larger diameter and shorter tubes B in the inner sides of the boxes, the air to be
-heated being passed into the rear series of boxes by the action of a fan or blower,
or by suction, as to travel through the intervening spaces of the two tubes, as
indicated by the arrows in Figure 1.
All the front boxes, which may be in one casting or in several, as in Figure 2,
and also the rear boxes, as in Figure 3, are supplied with air through the main L
and branch pipes M, and after traversing between the tubes B, C, the streams
commingle in the respective front boxes D to travel back and be passed through
the branches N and main outlet P to the desired place in or from which the heated
air can be utilized. Instead of the outlet branches being connected to one main
outlet, as shown, they may each lead to different places, and if desired they may
be provided with taps or valves so that any one or more may be shut off, or the
supply of heated air be so regulated that only a portion to any one place may be
furnished as desired.
Q, Q, are plugs or doors to be removed when the flue passages or tubes B, C, C',
have to be cleaned. Instead of passing the products of combustion through the
chamber F, and then through the tubes C, C³, as above mentioned, they may be
passed direct from the fire into those tubes and then to circulate around and
between the outer tubes in the chamber F on their way to the uptake.
Having now described the nature of our said Invention, and in what manner
the same is to be performed, we declare that we claim,-
The apparatus, shown at Figure 1 of the annexed Drawings, the essential
features being the front and rear boxes D, E, Figures 2 and 3, and the arrangement
of the tubes B, C, C¹, in those boxes, that air may be caused to traverse the
concentric spaces between said tubes and be heated by the passage of heat and
products of combustion within the chamber F and the interior of the tubes C, C¹,
for the purposes hereinbefore described.
In witness whereof, we, the said George Seagrave and Samuel Bourne
Bevington, have hereunto set our hands and seals, this Twentythird day
of August, in the year of our Lord One thousand eight hundred and
eighty one.
GEORGE SEAGRAVE.
(L.S.)
SAMUEL B. BEVINGTON. (L.S.)