IMPROVEMENTS IN APPARATUS FOR THE SUPPLY OF HEATED AIR TO STEAM BOILER FURNACES
Year: 1878

page_text: LETTERS PATENT to Charles de Nottbeck, Civil Engineer, of St. Petersburgh,
in the Empire of Russia, at present residing at No. 38, Bury Street, in the
County of Middlesex, for the Invention of "IMPROVEMENTS IN APPARATUS
FOR THE SUPPLY OF HEATED AIR TO STEAM BOILER FURNACES."
Sealed the 10th June 1879, and dated the 16th December 1878.
PROVISIONAL SPECIFICATION left by the said Charles de Nottbeck at the
Office of the Commissioners of Patents on the 16th December 1878.
CHARLES DE NOTTBECK, Civil Engineer, of St. Petersburgh, in the Empire of
Russia, at present residing at No. 38, Bury Street, in the County of Middlesex.
"IMPROVEMENTS IN APPARATUS FOR THE SUPPLY OF HEATED AIR TO STEAM BOILER
FURNACES."
This Invention has for its object improvements in apparatus for the supply of
heated air to steam boiler furnaces.
The apparatus makes possible an economy of fuel by transmitting the heat
escaping through the chimney to the air admitted to the fire place of the boiler.
The principal part of the apparatus is an ironplate box with several separations
inside to cause the air in its passage through the box to take a circuitous course.
To this box two sets of pipes are fixed, the cold air inlet pipes and the hot air
outlet pipes. The iron plate box is placed between the boiler and the chimney as
near as possible to the boiler where the escaping heat is greater.
The air entering through the cold air inlets gets heated to a high temperature in
passing through the ironplate box, and is forced from the box by the atmospheric
pressure through the outlet pipes to the fire place of the boiler. These pipes may
be conducted below, above, or aside of the boiler. Below the fire place at the
mouth of the ash pit another ironplate box is fixed to which the hot air pipes are
adapted; it may have a door in front to get out the ashes. This arrangement will
Price R71

page_text: not prevent the draught of the boiler; on the contrary, the velocity of the air will
be increased by expanding.
It is easily understood that economy of fuel is obtained, for a part of the escaping
heat is returned to the boiler again, and this corresponds to a certain amount of
coal.
Adapted to locomotives the ironplate box or air heater has a circular form with
radial partitions inside. It is placed in front of the locomotive in the smoke box,
and the escaping heat being very great it must be made of strong wrought iron
plate or of cast iron. The cold air is admitted from the front through a collector
or trumpet mouth, and the hot air is conducted to the fire place by the hot air
pipes as before. When the train is in motion the air is pressed through the box or
air heater and its outlet pipes with great power, and will reach the enclosed space
beneath the fire place, thereby increasing the draught; its temperature also will be
very high. This arrangement will not prevent the cleaning of the boiler tubes
from the front, for being fixed to the usual exterior plate or smoke box door it may
be taken out with it.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Charles de Nottbeck in the Great Seal Patent Office on the 14th
June 1879.
CHARLES DE NOTTBECK, Civil Engineer, of St. Petersburgh, in the Empire of
Russia, at present residing at No. 38, Bury Street, in the County of Middlesex.
IMPROVEMENTS IN APPARATUS FOR THE SUPPLY OF HEATED AIR TO STEAM BOILER
FURNACES."
This Invention has for its object improvements in apparatus for the supply of
heated air to steam boiler furnaces.
The apparatus makes possible an economy of fuel by transmitting the heat
escaping through the chimney to the air admitted to the fireplace of the boiler.
The principal part of the apparatus is an ironplate box with several separations
inside to cause the air in its passage through the box to take a circuitous course..
To this box two sets of pipe are fixed, the cold air inlet pipes and the hot air
outlet pipes. The ironplate box is placed between the boiler and the chimney as
near as possible to the boiler where the escaping heat is greater.
The air entering through the cold air inlets gets heated to a high temperature in
passing through the ironplate box, and is forced from the box by the atmospheric
pressure through the outlet pipes to the fire place of the boiler. These pipes may
bo conducted below, above, or aside of the boiler. Below the fireplace at the
mouth of the ash pit another iron plate box is fixed to which the hot air pipes are
adapted; it may have a door in front to get out the ashes. This arrangement will
not prevent the draught of the boiler; on the contrary, the velocity of the air will
be increased by expanding.
It is easily understood that economy of fuel is obtained, for a part of the escaping
heat is returned to the boiler again, and this corresponds to a certain amount of
coal. Adapted to locomotives the ironplate box or air heater has a circular form
with radial partitions inside. It is placed in front of the locomotive in the smoke
box, and the escaping heat being very great it must be made of strong wrought
ironplate or of cast iron. The cold air is admitted from the front through a collector
or trumpet mouth, and the hot air is conducted to the fireplace by the hot air
pipes, as before. When the train is in motion the air is pressed through a box or
air heater and its outlet pipes with great power, and will reach the enclosed space
beneath the fireplace, thereby increasing the draught; its temperature also will be
very high.
This arrangement will not prevent the cleaning of the boiler tubes from the
front, for being fixed to the usual exterior plate or smoke box door it may be taken
out with it.
In order that my said Invention may be most fully understood and readily
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Figure 1 is a longitudinal section of a stationary steam boiler having apparatus
applied to it for the supply of heated air, such apparatus being arranged in
accordance with my Invention.
Figure 2 is a front elevation of the same.
Figure 3 shows to a larger scale a longitudinal and vertical section of a portion
of the heating apparatus.
Figure 4 is a transverse vertical section of the same.
a is a box constructed of plate iron, and placed between the boiler and the
chimney, so that it becomes heated by the waste heat; b is a pipe admitting air to
the box a; and a¹, a', are partitions within the box compelling the air as it passes
through to take a zig zag course, and to be detained in the box sufficiently long to

page_text: become heated; c, c, are pipes by which the heated air is conducted from the box a
to the ash pit of the boiler; they terminate in a box or case d which serves to
close the ash pit in front.
Figure 5 is a longitudinal section of a locomotive engine provided with an air
heater constructed according to my Invention.
Figures 6, 7, and 8 show respectively transverse and longitudinal vertical sections
and an horizontal section of a portion of the heating apparatus; e is a box of strong
plate iron constructed within the smoke box of the engine; e', e¹, are radial
partitions within the box e compelling the air passing through to take a circuitous
course; is a funnel shaped mouth by which the air is admitted to the box; g is a
pipe by which the air, when heated, is conducted into the ash pit or space beneath
the fire bars, which space is closed although provided with a door which can be
opened at pleasure.
Having thus described the nature of my said Invention, and the manner of
performing the same, I would have it understrod that I claim the arrangement of
apparatus for the supply of heated air to steam boiler furnaces, substantially as
herein described, and represented in the annexed Drawings.
In witness whereof, I, the said Charles de Nottbeck, have hereunto set my
hand and seal, this Seventh day of June, in the year of our Lord One
thousand eight hundred and seventy nine.
C. DE NOTTBECK. (L.B.)