IMPROVEMENTS IN STOVES OR FURNACES
Year: 1882

page_text: LETTERS PATENT to Herbert John Haddan, of Kensington, Middlesex, for
an Invention of IMPROVEMENTS IN STOVES OR FURNACES A communi-
cation to him from abroad by Daniel McBride Graham, of the State of
Massachusetts, United States of America.
PROVISIONAL SPECIFICATION left by the said Herbert John Haddan at
the Office of the Commissioners of Patents on the 10th August 1882.
HERBERT JOHN HADDAN, of Kensington, Middlesex, IMPROVEMENTS IN STOVES
OR FURNACES, a communication to me from abroad by Daniel McBride Graham,
of the State of Massachusetts, United States of America,
This invention consists in providing the upper part of a stove and above the
space for the reception of the fuel, with a drum having a series of flue pipes
extending through it from its bottom to its top, and opening through both.
Such
druin having made in its bottom a series of educts or holes for the discharge of
heated air downward into the fuel or the flame thereof when such fuel may be in a
state of combustion.
Into this drum, either at its upper or lower part, is led one or two air induction
pipes. If two pipes are used, one is placed partly outside of the stove, and opening
into the upper part of the drum. The other pipe or air induct, after passing into
the stove just above its grate, extends upward within the stove to the drum, and
opens into it at its central part. This latter pipe I provide with a series of holes
for the discharge of air from it laterally into the Smoke or gas space of the stove.
Each air induct has in it a damper.
In the above-described stove, the smoke and gasses escaping from the fuel when
in combustion, pass around and in contact with the drum, and upward through its
flue pipes to the discharge flue, the drum in the meantime being heated by them so
as to impart heat to the air that may enter it by either or both the induction pipes.
Such air after having been thus heated, will flow in currents out of the bottom of
the drum, and upon the fuel or smoke and gasses eliminated therefrom, and thereby
greatly aid or facilitate combustion of such fuel, smoke or gasses, and consequently
improve the heating powers of the stove.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Herbert John Haddan in the Great Seal Patent Office on the
10th February 1883.
IN
HERBERT JOHN HADDAN, of Kensington, Middlesex
"IMPROVEMENTS
STOVES OR FURNACES," a communication to me from abroad by Daniel McBride
Graham, of the State of Massachusetts, United States of America
In the accompanying drawings, Figure 1 is a vertical section of a stove provided
with the invention, the nature of which is defined in the claim or claims hereinafter
presented.
Figure 2 is a vertical section of such stove showing but one air induct to its air
heating and discharging drum.
Figure 3 is a horizontal section of the stove and its drum.
In the drawings, A denotes a common stove or furnace for the combustion of
fuel its grate being shown at a, the ash chamber at b, the door way for the supply
of fuel at c, and the smoke discharge flue or pipe at d.
Within, the upper part of the and above the space for reception of the fuel,
is a drum B, having a series of flue pipes e, extending through it from its bottom
to its top, and opening through both. Such drum also has made in its bottom,
a series of educts or holes f for the discharge of heated air downward into the fuel
or the flame thereof, when such fuel may be in a state of combustion.
Into this drum either at its upper or lower part is led one or two air induction
pipes.
In Figure 1 two of such pipes are shown at C and D, one of them, viz: that
marked C, being partly outside of the stove, and opening into the upper part of
the drum. The other pipe or air induct after passing into the stove just above its
grate extends upward within the stove to the drum, and opens into it at its central
part. This latter pipe I provide with a series of holes g for the discharge of air
from it laterally into the smoke or gas space of the stove.
Each air induct has in it a damper, for regulating the flow of air through it, one
of such dampers being shown at h, and the other at i.
In the above described stove the smoke and gases escaping from the fuel when in
combustion, pass around and in contact with the drum, and upward through its
flue pipes to the discharge flue, the drum in the meantime being heated by them-
so as to impart heat to the air that may enter it by either or both the induction
pipes. Such air after having been thus heated will flow in currents out of the
bottom of the drum, and upon the fuel or smoke and gases eliminated therefrom,
and thereby greatly aid or facilitate combustion of such fuel, smoke or gases, and
consequently improve the heating powers of the stove.
By having the two air inducts, one arranged within and the other without the
stove, in manner as represented, and each provided with a damper, as set forth-the
air can be introduced to great advantage into the drum and stove, and its passage
therein can be regulated as circumstances may require for obtaining a practically
complete combustion of the smoke and gases discharged from the fuel.
1. In combination with the stove, the drum arranged in the upper part thereof
and provided with the air induct and educts and flue pipes, arranged with it as
set forth.
2. The air induct arranged within the stove, and provided with holes of discharge
as explained in combination with the stove and with the drum arranged therein,
and having flue pipes and air educts as set forth.

page_text: 3. The combination of the stove and the drum arranged in it, and provided with
flue pipes and air educts as set forth, with the two air induction pipes, having
dampers; and arranged with such stove and drum substantially as described and
represented.
4. The combination of the stove and the drum arranged within it and provided
with Blue pipes and air educts disposed as set forth, with the two hot air induction
pipes having dampers and arranged with such stove and drum substantially as
represented,
In Witness whereof I the said Herbert John Haddan have hereunto set
my hand and seal this tenth day of February A.D. 1883.
H. J. HADDAN. (L.S.)