Improvements in Generators and Engines Working by Hot Air, Steam, and Furnace Gases, or Hot Air and Steam.
Year: 1891

page_text: Date of Application, 9th Jan., 1891
Complete Specification Left, 16th Sept., 1891-Accepted, 24th Dec., 1891
PROVISIONAL SPECIFICATION.
Improvements in Generators and Engines Working by Hot Air,
Steam, and Furnace Gases, or Hot Air and Steam.
We, EMILE KEHLBERGER, Artist, and LUCIEN FOUQUE, Engineer, both of
12, Rue de Crimée, Paris, France, do hereby declare the nature of this invention
to be as follows :-
Our invention relates to an engine operated by compressed air heated to a
temperature of 250° C. and saturated with steam, and also to a generator for
preparing the gaseous mixture employed.
In this improved engine, each stroke of the main piston compresses one volume
of cold air and delivers it to the generator after passing through a regenerator, at
same time that a volume of water of from one-half to one per cent. of the volume of
air is passed into the generator after traversing the jacket of the regenerator.
This water becomes converted into steam and the latter acquiring the same
temperature as the hot air, the mixture may be expanded to a high degree in the
main cylinder. The engine may be either horizontal or vertical and as it is
completely separated from the furnace, it is not liable to rapid destruction. The
pressure to which the gaseous mixture may be raised is unlimited, and very
powerful engines may be constructed of very limited dimensions.
We will first describe the generator, of which three examples are given, one
arrangement being represented in Figures 6 to 9 of the accompanying drawings,
forming part of this Specification, in which Figure 6 is a central vertical section of
the generator, Figures 7, 8, and 9, are horizontal sections taken respectively through
the fuel chamber, the heat accumulator, and above the grate.
A is a closed container for fuel, of stout metal, fitted with a stopper B and
provided with a funnel-shaped spout E at bottom in the upper part of which are
mounted a pair of feed drums C, for which may be substituted the feed apparatus
The feed drums are
represented in Figure 17 or other equivalent arrangement.
driven from a pulley 3 (Figure 7) through gear wheels 12 and the fuel is thereby
supplied into a furnace chamber N through a central opening made in a fireclay or
cast-iron block G provided with vertical passages of small diameter around the
central opening for the passage of the products of combustion and the compressed
air, the block serving as a heat accumulator for heating the gaseous mixture. The
furnace N is of truncated conical form and provided with a rotary drum-shaped
grate through which the ashes fall into the closed ash pit at the bottom of the
casing whence they are withdrawn at the door J. The furnace chamber extends
upwards in the form of a cylinder H in which the perforated block G is supported
and terminates at bottom in an external flange dividing the upper part of the
casing O from the ash pit. The cylindrical part H is provided with an external
helical rib extending its entire height to within a certain distance of the bottom
flange and it is enclosed at a distance in a sheet iron hood M' open at bottom and
serving to produce a circulation of the hot gases and also to throw down the ashes
carried off therewith. Water is pumped by the feed pump, first through a heater
and then through pipe L on to the upper end of the spiral flange encircling
cylinder H down which it flows until it becomes vaporized. Compressed air is
introduced into the ash pit by the pipe M (after having first passed through the
tubes of the heater hereinafter described) and the gaseous mixture escapes under
pressure through K to the engine.
The operation of the generator is as follows:-The container A having been filled
with fuel and plug B closed, some incandescent charcoal or other fuel is introduced
at D (J being open) for the purpose of lighting the fire upon the grate and when

page_text: the fuel has become ignited and the block G heated, the covers D, J, are tightly
closed and one of the fly wheels of the engine is then rotated by hand to compress
the air in the compressing cylinder and force it into furnace N at same time that
water is supplied to the spiral rib of cylinder H and converted into steam which
then mixes with the gaseous products of combustion. This mixture of gases and
steam passes away by pipe K to the engine.
Figures 25 and 26 shew respectively a central longitudinal section and transverse
section of the compressed air and water heater. It is constructed of a double
casing S capable of resisting pressure, between the walls of which the water
supplied by the feed pump circulates from the inlet at n to the outlet at o' to the
generator. The compressed air from the compressing cylinders enters at J into the
space P and passes through the tubes R to space P₁ and out at pipe 23" to the ash
pit of the generator before described; the exhaust enters at the space surrounding
the tubes and escapes at m into the atmosphere. p is a purge cock.
Figures 27 and 28 shew respectively a central section and face view of one
arrangement of engine cylinder. A is the working cylinder, A2 compressing
cylinder, B the driving piston attached to the compressing plunger B2; B³ is the
piston rod common to both. C₁ is the air inlet pipe, and 2 the delivery pipe for
the compressed air. D is the valve box for distribution of compressed air to
working cylinder, and D³ is the valve box for distribution of the gaseous mixture
from one side of piston B to the other. The gaseous mixture under pressure is
admitted by pipe 6 to valve box D and passes through a port uncovered by the
valve 2 into space A, moving piston B from right to left, compressing the air in
cylinder A2, and forcing it out at pipe 8 to the generator. On the piston reaching
the end of its stroke, valve 2 closes the admission port and the gases pass by pipe 10
to the valve box D³ the admission port of which is uncovered. The gases in
expanding move the piston B from left to right, while the piston B2 is drawing in
air at C¹ and so on.
Figures 33 to 36 represent the valves placed at the bottom of the compressing
cylinder A². Figures 33 and 34 shew the suction valve and Figures 35 and 36 the
delivery valve. a valve seat. b valve balanced by spring a¹.
Figures 1 to 5 illustrate a single-acting engine. Figure 1 is a central vertical
section through the cylinders, and Figure 2 is an elevation of the engine. Figure 3
is a longitudinal section, Figure 4 a plan, and Figure 5 an end view of the valve box
containing the suction and delivery valves for the cold air conveyed to the generator.
The gaseous mixture under pressure supplied from the generator enters valve
box 4 and piston D being at the lower end of its stroke, as shewn in Figure 1, the
gases enter through the lower port beneath the piston and raise it to the upper end
of its stroke by which time the eccentric N, whose collar is pivoted at 11 and
connected at 12 to the valve rod 1, has moved the slide valve F so as to put the
two ends of the cylinder in communication by the passage through said valve so as
to admit the gaseous mixture to the upper end of cylinder B where it expands and
effects the downward movement of piston D owing to the difference of area of the
two faces of the latter. The valve then uncovers the admission port to the
lower side of the piston D which again rises, the expanded gases above the piston
exhausting through 3 and so on. At each up-stroke of piston D a volume of air is
inhaled at valve 9 and on the down-stroke, this cylinder-full of air is compressed
and delivered by valve 10 in valve box Ġ to the generator. O is the feed pump
driven from the engine shaft L for supplying a certain quantity of water to the
generator at each revolution. The available power is equal to the difference
between that produced by the main piston and that expended by the compression
of the air in the cylinder C. The engine may be provided with a condenser. The
working cylinder B and compressing cylinder C are supported by columns 2 upon a
frame A which carries the guides J for the sliding cross-head H to which are
attached the two connecting rods K and the main piston rod 5. 6 is the governor
driven by a belt on pulley 7. M M fly wheels.
In order to supply the compressed air continuously to the generator, we employ

page_text: two compressing cylinders, as shewn in Figures 29 to 32, in which Figure 29 is a
central vertical section, taken through the triple cylinders, and Figure 30 an
underside plan of same. Figures 31 and 32 are elevations of the engine.
A is the working cylinder, A' A' the compressing cylinders, and B B¹ the piston
common to both. O pipe to the heater at j Figure 25. The gaseous mixture at
high temperature and under pressure enters at 6 the distributing valve box D
containing an ordinary slide valve 2. In the position shewn in Figure 29 it is
entering by the lower part 4 and piston B is moving upwards drawing air into
cylinder A by pipe C provided with a valve 7 while the compressed air from
cylinder A is forced through pipe C² provided with a delivery valve 8 to the
generator.
On the reversal of motion of the slide valve, the gaseous mixture is admitted
through port 5 and forces piston B down, drawing air into the cylinder A' and
driving it out of cylinder A2 through the pipe C¹ and so on. B³ is the piston rod
working in a stuffing-box 9. The two outlets C2 C3 unite with pipe C whence
pipe C leads to the generator. F is the feed pump driven from the shaft I*
turning in bearings E1, E2, E3, E, upon a base plate E, and has two cranks I² I³
coupled by connecting rods I l' to a cross-head 11 sliding in guides 1. J J¹ are
fly wheels.
Figures 10 to 14 represent a modified arrangement; Figure 10 being a vertical
section of the engine, taken through the cylinders, and Figure 11 an elevation of
the same. Figures 12, 13, and 14, shew details of the suction and delivery valves
of the compression cylinders.
B is the working cylinder, E its distributing valve box, 5 the cover, and F its
slide valve worked by a rod 9 and connecting rod 8. The cylinder B is placed
between two compression cylinders C C which deliver air through the valves 22
(Figures 12 to 14) in the cylinder heads N N¹ and opening into a pipe common to
both leading to the generator. The cylinders B, C, C', are bolted to a standard a
resting on pillars 4 4. The rod 2 of piston D, which is common to all three
cylinders, passes through a stuffing-box and its upper end 1 is guided by a fixed
arm I. The two connecting rods J couple the cranks of shaft K to a cross-head G,
sliding in guides H. M M are fly wheels. The feed pump L is operated by an
eccentric 12. The heated gases from the generator enter valve box E at 6 and, in
the position shewn in Figure 10, pass beneath the piston D, the upper part of the
cylinder being open to the exhaust 7. On piston D reaching the other end of its
stroke, the slide valve F, which is actuated by eccentric 17, uncovers the upper
port and the piston descends, the lower port being then opened to the exhaust 7.
At each single stroke of piston D, air is drawn into the one cylinder C or C¹ and
expelled from the other cylinder C¹ or C, the available power being represented
by the difference between the power expended upon the large piston and the
resistance due to the compression of air in the compression cylinder.
In order to facilitate the compression of the air and render constant the volume
of air inhaled into the compression cylinders, we employ an air pump, (not shewn)
driven from the main shaft, having the same capacity as each of said cylinders, to
force air at a low pressure into a reservoir in communication with the compression
cylinders. 13 engine governor driven by band or other suitable gearing 14.
Figures 15 to 20 shew a modification of the generator. Figure 15 is a central
vertical section, and Figure 16 a horizontal section, of the same. Figures 17, 18, 19,
and 20, shew the mechanism for supplying the fuel to the generator furnace.
This generator is distinguished from that before described by the fuel-holder
being made separate from the rest of the apparatus and providing it with feed
mechanism by which all access of external air to the generator is excluded. The
generator is constructed of a plate iron cylinder of sufficient strength to support
B is a
the pressure of the gases generated therein, and provided with a cover 1.
furnace chamber, made of cast iron and provided with a feed tube E and with a
firing mouth C closed by a screw and cover 5 6. The casing O is divided by a
flange at the top of the furnace and the upper compartment a contains the heat

page_text: accumulator K consisting of a perforated block of cast iron surrounded by a
tubular coil F for vaporising the water supplied by pipe I from the feed pump, the
steam escaping by pipe J. A dome 2 is suspended above the accumulator K for
throwing down the ashes carried away with the gases of combustion.
compressed air supplied by the engine enters the ash pit at G and the gases of
combustion pass out at H to the engine. Dash pit door fixed by a screw 5.
The
The action is as follows:-The furnace B having been lighted as previously
described for the first arrangement and compressed air then supplied from the
compressing cylinders to the furnace by pipe G, the gases of combustion pass
through the channels 8 of accumulator K and escape at H into the mixer mounted
upon cover 1 (hereafter described with reference to Figures 21 to 24) where they
become mixed with the steam supplied by pipe J, the mixture of heated gases and
steam being then supplied through a stop valve to the valve chest of the engine.
Figures 17, 18, and 19, shew a rotary feeder for supplying the generator furnace
with fuel. Figure 17 is a central longitudinal section; Figure 18 a transverse
vertical section; and Figure 19 a horizontal section.
F is a feed wheel mounted in bearings 3 and enclosed in a hopper (not shewn)
and driven by pulley B keyed on shaft 1 upon the other end of which is keyed a
pulley C having a crank pin 2 to which is coupled, by a connecting rod D, a
plunger G. The feed wheel F is driven by a band on pulleys C and E and at
each revolution receives a charge of fuel in its cavity 7 which it discharges through
a hopper 4 into a cavity in plunger G, which, in moving from right to left, brings
the charge of fuel over an aperture 5 through which it falls into a shoot com-
municating with the feed tube E, Figures 16 and 17.
In Figure 20 the plunger G is shewn as made of square section.
Figures 21 to 24 represent another arrangement of generator differing from the
foregoing in that the gaseous products of combustion are discharged into the
atmosphere without mixing either with the steam or the compressed air. Figure 21
is a central vertical section, Figure 22 an elevation, Figure 23 a horizontal section,
and Figure 24 a plan, of the generator.
F furnace provided with a charging door and cleaning door 9. The generator
contains two or more coils, one C for receiving the compressed air to be heated, the
other D for the water. The compressed air introduced at 6 circulates in coil C,
becomes heated therein, and passes into mixing chamber A by a dip-pipe 2.
Similarly, the water entering coil D at 7 becomes heated therein and enters the
chamber A by the dip-pipe 3. The hot air bubbling through the water, with
which the chamber is about half-filled, carries off a large amount of steam, the
mixture then passing through cock 1 to the engine. B safety-valve, 4 purge-cock,
5 socket to receive a pressure-gauge, 11 water-gauge 12, chimney.
Dated this 9th day of January 1891.
E. KEHLBERGER.
L. FOUQUE.
By A. M. & Wm. Clark,
53, Chancery Lane, London, Patent Agents.
COMPLETE SPECIFICATION.
Improvements in Generators and Engines Working by Hot Air,
Steam, and Furnace Gases, or Hot Air and Steam.
We, EMILE KEHLBERGER, Artist, and LUCIEN FOUQUE, Engineer, both of
12, Rue de Crimée, Paris, France, 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:-
Our invention relates to an engine operated by compressed air heated to a
temperature of 250° C. and saturated with steam, and also to a generator for
preparing the gaseous mixture employed.

page_text: In this improved engine, each stroke of the main piston compresses one volume
of cold air and delivers it to the generator after passing through a regenerator, at
same time that a volume of water of from one-half to one per cent. of the volume of
air is passed into the generator after traversing the jacket of the regenerator.
This water becomes converted into steam and the latter acquiring the same
temperature as the hot air the mixture may be expanded to a high degree in the
main cylinder. The engine may be either horizontal or vertical and as it is
completely separated from the furnace, it is not liable to rapid destruction. The
pressure to which the gaseous mixture may be raised is unlimited, and very
powerful engines may be constructed of very limited dimensions.
We will first describe the generator, of which three examples are given, one
arrangement being represented in Figures 6 to 9 of the drawings accompanying our
Provisional Specification; in which Figure 6 is a central vertical section of the
generator, Figures 7, 8, and 9, are horizontal sections taken respectively through
the fuel chamber, the heat accumulator, and above the grate.
A is a closed container for fuel, of stout metal, fitted with a stopper B and
provided with a funnel-shaped spout E at bottom in the upper part of which are
mounted a pair of feed drums C, for which may be substituted the feed apparatus
represented in Figure 17 or other equivalent arrangement. The feed drums are
driven from a pulley 3 (Figure 7) through gear wheels 2 and the fuel is thereby
supplied into a furnace chamber N through a central opening made in a fireclay or
cast-iron block G provided with vertical passages of small diameter around the
central opening for the passage of the products of combustion and the compressed
air, the block serving as a heat accumulator for heating the gaseous mixture. The
furnace N is of truncated conical, form and provided with a rotary drum-shaped
grate through which the ashes fall into the closed ash pit at the bottom of the
casing whence they are withdrawn at the door J. The furnace chamber extends
upwards in the form of a cylinder H in which the perforated block G is supported
and terminates at bottom in an external flange dividing the upper part of the
casing O from the ash pit. The cylindrical part H is provided with an external
helical rib extending its entire height to within a certain distance of the bottom
flange and it is enclosed at a distance in a sheet iron hood M' open at bottom and
serving to produce a circulation of the hot gases and also to throw down the ashes
carried off therewith. Water is pumped by the feed pump, first through a heater
and then through pipe L on to the upper end of the spiral flange encircling
cylinder H down which it flows until it becomes vaporized. Compressed air is
introduced into the ash pit by the pipe M (after having first passed through the
tubes of the heater hereinafter described) and the gaseous mixture escapes under
pressure through K to the engine.
The operation of the generator is as follows:-The container A having been
filled with fuel and plug B closed, some incandescent charcoal or other fuel is
introduced at D (J being open) for the purpose of lighting the fire upon the grate
and when the fuel has become ignited and the block & heated, the covers D, J, are
tightly closed and one of the fly wheels of the engine is then rotated by hand to
compress the air in the compressing cylinder and force it into furnace N at same
time that water is supplied to the spiral rib of cylinder H and converted into steam
which then mixes with the gaseous products of combustion. This mixture of gases
and steam passes away by pipe K to the engine.
Figures 25 and 26 shew respectively a central longitudinal section and transverse
section of the compressed air and water heater. It is constructed of a double
casing S capable of resisting pressure, between the walls of which the water
supplied by the feed pump circulates from the inlet at n to the outlet at o' to the
generator. The compressed air from the compressing cylinders enters at J into
the space P and passes through the tubes R to space P¹ and out at pipe 23ª to
the ash pit of the generator before described; the exhaust enters at the space
surrounding the tubes and escapes at m into the atmosphere. p is a purge cock.
Figures 27 and 28 shew respectively a central section and face view of one

page_text: arrangement of engine cylinder. A is the working cylinder, A² compressing
cylinder, B' the driving piston attached to the compressing plunger B²; B³ is the
piston rod common to both. C' is the air inlet pipe, and the delivery pipe for
the compressed air. D³ is the admission valve box for the gaseous mixture to one
end of the working cylinder, and D is the valve box for the transfer of the gaseous
mixture from one side of piston B₁ to the other. The heated gaseous mixture
under pressure is admitted by pipe 6 to valve box D³ and passes through a port 10
uncovered by the valve 2 into the space A¹, moving the piston B' from left to right,
the piston B2 then drawing air into cylinder A by pipe C. On the piston B¹
reaching the end of its stroke, valve 2 closes the admission port 10 and the gases
pass by the passage a, the valve box D' and the admission port b, which is then
uncovered, to the end A of the cylinder, where they expand and move the piston B¹
from right to left, the piston B2 then compressing the air and forcing it through
pipe C into the generator. On the reverse movement of the valve 3 the port b is
put in communication with the exhaust and so on.
Figures 33 to 36 represent the valves placed at the bottom of the compressing
cylinder A Figures 33 and 34 shew the suction valve and Figures 35 and 36 the
delivery valve. a valve seat. b valve balanced by spring a!.
Figures 1 to 5 illustrate a single-acting engine. Figure 1 is a central vertical
section through the cylinders, and Figure 2 is an elevation of the engine.
Figure 3 is a longitudinal section, Figure 4 a plan, and Figure 5 an end view of the
valve box containing the suction and delivery valves for the cold air conveyed to
the generator.
. The gaseous mixture under pressure supplied from the generator enters valve
box 4 and piston D being at the lower end of its stroke, as shown in Figure 1, the
gases enter through the lower port beneath the piston and raise it to the upper end
of its stroke by which time the eccentric N, whose collar is pivoted at 11 and
connected at 12 to the valve rod 1, has moved the slide valve F so as to put the
two ends of the cylinder in communication by the passage through said valve so as
to admit the gaseous mixture to the upper end of cylinder B where it expands and
effects the downward movement of piston D owing to the difference of area of the
two faces of the latter. The valve then uncovers the admission port to the lower
side of the piston D which again rises, the expanded gases above the piston
exhausting through 3 and so on. At each up-stroke of piston D a volume of air is
inhaled at valve 9 and on the down-stroke, this cylinder-full of air is compressed
and delivered by valve 10 in valve box G to the generator.
O is the feed pump
driven from the engine shaft L for supplying a certain quantity of water to the
generator at each revolution. The available power is equal to the difference
between that produced by the main piston and that expended by the compression of
the air in the cylinder C. The engine may be provided with a condenser. The
working cylinder B and compressing cylinder (are supported by columns 2 upon a
frame A which carries the guides J for the sliding cross-head H to which are
attached the two connecting rods K and the main piston rod 5.
6 is the governor
driven by a belt on pulley 7. M M fly wheels.
In order to supply the compressed air continuously to the generator, we employ
two compressing cylinders, as shewn in Figures 29 to 32, in which Figure 29 is a
central vertical section, taken through the triple cylinders, and Figure 30 an
underside plan of same. Figures 31 and 32 are elevations of the engine.
A is the working cylinder, A' A² the compressing cylinders, and B B' the piston
common to both. C₁ pipe to the heater at Figure 25. The gaseous mixture at
high temperature and under pressure enters at 6 the distributing valve box D
containing an ordinary slide valve 2. In the position shewn in Figure 29 it is
entering by the lower port 4 and piston B is moving upwards drawing air into
cylinder A by pipe C provided with a valve 7 while the compressed air from
cylinder A is forced through pipe C provided with a delivery valve 8 to the
generator.
On the reversal of motion of the slide valve, the gaseous mixture is admitted

page_text: through port and forces piston B down, drawing air into the cylinder A' and
driving it out of cylinder A² through the pipe C¹ and so on. B³ is the piston rod
working in a stuffing-box 9. The two outlets C³ C³ unite with pipe C³ whence
pipe C leads to the generator. F is the feed pump driven from the shaft I*
turning in bearings E¹, E², E³, E', upon a base plate E, and has two cranks I² [³
coupled by connecting rods I I¹ to a cross-head 11 sliding in guides I. J J¹ are
fly wheels.
Figures 10 to 14 represent a modified arrangement; Figure 10 being a vertical
section of the engine, taken through the cylinders, and Figure 11 an elevation of
the same. Figures 12, 13, and 14, shew details of the suction and delivery valvės
of the compression cylinders.
B is the working cylinder, E its distributing valve box, 5 the cover, and F its
slide valve worked by a rod 9 and connecting rod 8. The cylinder B is placed
between two compression cylinders C C which deliver air through the valves 22
(Figures 12 to 14) in the cylinder heads N N¹ and opening into a pipe common to
both leading to the generator. The cylinders B, C, C', are bolted to a standard a
resting on pillars 4 4. The rod 2 of piston D, which is common to all three
cylinders, passes through a stuffing-box and its upper end 1 is guided by a fixed
arm I. The two connecting rods J couple the cranks of shaft K to a cross-head G,
sliding in guides H. M M are fly wheels. The feed pump L is operated by an
eccentric 12. The heated gases from the generator enter valve box E at 6 and, in
the position shewn in Figure 10, pass beneath the piston D, the upper part of the
cylinder being open to the exhaust 7. On piston D reaching the other end of its
stroke, the slide valve F, which is actuated by eccentric 17, uncovers the upper
port and the piston descends, the lower port being then opened to the exhaust 7.
At each single stroke of piston D, air is drawn into the one cylinder C or C¹ and
expelled from the other cylinder C' or C, the available power being represented
by the difference between the power expended upon the large piston and the
resistance due to the compression of air in the compression cylinder.
In order to facilitate the compression of the air and render constant the volume
of air inhaled into the compression cylinders, we employ an air pump, (not shewn)
driven from the main shaft, having the same capacity as each of said cylinders, to
force air at a low pressure into a reservoir in communication with the compression
cylinders. 13 engine governor driven by band or other suitable gearing 14.
Figures 15 to 20 shew a modification of the generator. Figure 15 is a central
vertical section, and Figure 16 a horizontal section, of the same. Figures 17, 18,
19, and 20, shew the mechanisin for supplying the fuel to the generator furnace.
This generator is distinguished from that before described by the fuel-holder
being made separate from the rest of the apparatus and providing it with feed
mechanism by which all access of external air to the generator is excluded. The
generator is constructed of a plate iron cylinder O of sufficient strength to support
the pressure of the gases generated therein, and provided with a cover 1.
B is a
furnace chamber, made of cast iron and provided with a feed tube E and with a
firing mouth C closed by a screw and cover 5 6. The casing O is divided by
a flange at the top of the furnace and the upper compartment a contains the heat
accumulator K consisting of a perforated block of cast iron surrounded by a
tubular coil F for vaporising the water supplied by pipe I from the feed pump, the
steam escaping by pipe J. A dome 2 is suspended above the accumulator K for
throwing down the ashes carried away with the gases of combustion. The com-
pressed air supplied by the engine enters the ash pit at G and the gases of
combustion pass out at H to the engine. Dash pit door fixed by a screw 5.
The action is as follows:-The furnace B having been lighted as previously
described for the first arrangement and compressed air then supplied from the
compressing cylinders to the furnace by pipe G, the gases of combustion pass
through the channels 8 of accumulator K and escape at H into the mixer mounted
upon cover 1 (hereafter described with reference to Figures 21 to 24) where they
become mixed with the steam supplied by pipe J, the mixture of heated gases

page_text: CHC
and steam being then supplied through a stop valve to the valve chest of
engine.
Figures 17, 18, and 19, shew a rotary feeder for supplying the generator furnace
with fuel. Figure 17 is a central longitudinal section; Figure 18 a transverse
vertical section; and Figure 19 a horizontal section.
F is a feed wheel mounted in bearings 3 and enclosed in a hopper (not shewn)
and driven by pulley B keyed on shaft 1 upon the other end of which is keyed a
pulley C having a crank pin 2 to which is coupled, by a connecting rod D, a
plunger G. The feed wheel F is driven by a band on pulleys C and E and at each
revolution receives a charge of fuel in its cavity 7 which it discharges through a
hopper 4 into a cavity in plunger G, which, in moving from right to left, brings the
charge of fuel over an aperture 5 through which it falls into a shoot communicating
with the feed tube E, Figures 16 and 17.
In Figure 20 the plunger G is shewn as made of square section.
Figures 21 to 24 represent another arrangement of generator differing from the
foregoing in that the gaseous products of combustion are discharged into the
atmosphere without mixing either with the steam or the compressed air. Figure 21
is a central vertical section, Figure 22 an elevation, Figure 23 a horizontal section,
and Figure 24 a plan, of the generator.
F furnace provided with a charging door 8 and cleaning door 9. The generator
contains two or more coils, one C for receiving the compressed air to be heated, the
other D for the water. The compressed air introduced at 6 circulates in coil C,
becomes heated therein, and passes into mixing chamber A by a dip-pipe 2.
Similarly, the water entering coil D at 7 becomes heated therein and enters the
chamber A by the dip-pipe 3. The hot air bubbling through the water, with which
the chamber is about half-filled, carries off a large amount of steam, the mixture
then passing through cock 1 to the engine. B safety-valve, 4 purge-cock, 5 socket
to receive a pressure-gauge, 11 water-gauge, 12 chimney.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed we declare that what we
claim is-
1st. An aero-hydro-thermo-engine operated by a gaseous mixture at a high
temperature, consisting of compressed air which after traversing a furnace is mixed
with steam generated by said furnace, and acts on the piston in such manner that
the power available for turning the driving shaft is equal to the difference between
the force exerted by the gaseous mixture upon the piston and that expended in the
compression of the air serving for combustion, all as herein before described.
2nd. In an aero-hydro-thermo-engine, the combination of a working cylinder and
air-compressing cylinder, both having a common piston, as herein before described
and represented in Figures 1 to 5.
3rd. A generator, comprising a fuel container, furnace chamber, and heat
accumulator, all hermetically closed and in which combustion is maintained by the
introduction of compressed air from the engine for highly heating the gases of
combustion and to flash into steam water injected and made to flow down a helical
rib around the accumulator, all as hereinbefore described and represented in
Figures 6 to 9.
4th. An aero-hydro-thermo-engine having a cylinder in which a working piston
operated by a gaseous mixture at high temperature, develops power part of which
is utilized for compressing air alternately in two compressing cylinders and
supplying it to the generator, all as hereinbefore described and represented in
Figures 10 and 11.
5th. In an engine herein described, the combination of the working cylinder
with the two compressing cylinders, a piston, common to all, having differential
areas, a feed pump injecting water into the generator, and a valve box provided
with suction and delivery valves, all as hereinbefore described.
6th. A generator consisting in the combination of a hermetically closed furnace

page_text: provided with an ash pit and mechanically charged with fuel by a feed wheel or
other equivalent means, and a heat accumulator consisting of a cast iron block
perforated with vertical passages, all arranged for the purpose of raising to a high
temperature a gaseous mixture composed of the products of combustion in the
furnace and steam, as hereinbefore described and represented in Figures 15 to 20.
7th. A generator, consisting in the combination of series of coiled tubes for the
circulation of compressed air and of water, with a furnace for heating the said
fluids, and a mixer in which they are converted into a gaseous mixture for
supplying the engine, as hereinbefore specified.
Dated this 16th der of Santambor 1801
By A. M. & Wm.
E. KEHLBERGER.
L. FOUQUE.
Clark,
53, Chancery Lane, London, Chartered Patent Agents.