IMPROVEMENTS IN APPARATUS FOR GENERATING ELASTIC FLUID UNDER PRESSURE, AVAILABLE FOR WORKING ENGINES
Year: 1882

page_text: LETTERS PATENT to Henry Davey of Headingly near Leeds in the County
of York for an Invention of IMPROVEMENTS IN APPARATUS FOR GENERATING
ELASTIC FLUID UNDER PRESSURE, AVAILABLE FOR WORKING ENGINES
PROVISIONAL SPECIFICATION left by the said Henry Davey at the Office
of the Commissioners of Patents on the 9th August 1882.
HENRY DAVEY of Headingly near Leeds in the County of York
MENTS IN APPARATUS FOR GENERATING ELASTIC FLUID UNDER
AVAILABLE FOR WORKING ENGINES
"
"IMPROVE-
PRESSURE
My invention relates to apparatus for generating elastic fluid under pressure
available for working engines. I provide a strong boiler or generator with an
internal fire box into which I introduce air and gas under pressure in suitable
proportions for combustion. From the fire-box passages lead into the body of
water in the boiler these passages being provided with check valves to prevent
return of water from the boiler into the fire box.
For feeding the furnace and boiler I employ an engine working pumps supplying
air and gas in proper proportions and water for feed. When the gas is produced
under pressure by means of a generator such as that described in a provisional
specification filed by me on the 27th May 1882 N° 2527, both the air and gas are
delivered through meters coupled together so as to ensure the proper proportions.
I govern the supply to the furnace and consequently the generation of fluid by
regulating the pumping engine or the meters. For this purpose a small cylinder
is fitted with a piston loaded to the maximum pressure desired and this piston
being subject to the pressure in the generator actuates the throttle valve of the
pumping engine or throttle or regulating valves in the air and gas supply pipes.
The mixed fluid consisting of products of combustion mingled with steam generated
by them, may be led partly to work the pumping engine and partly to work
another engine. For first starting the combustion within the fire box it may be
provided with an outlet or chimney which, when the pumping engine works, can
be closed by a valve. Also a door may be provided giving access to ignite the gas,
or the ignition may be effected by electricity. Within the fire box any suitable
burners may be employed by which thorough combustion is effected.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Henry Davey in the Great Seal Patent Office on the 8th February
1883.
"
HENRY DAVEY of Headingly, near Leeds, in the county of York IMPROVE-
MENTS IN APPARATUS FOR GENERATING ELASTIC FLUID UNDER PRESSURE,
AVAILABLE FOR WORKING ENGINES
"
My invention relates to apparatus for generating elastic fluid under pressure
available for working engines. I provide a strong boiler or generator with an
internal fire box into which I introduce air and gas under pressure in suitable
proportions for combustion. From the fire-box, passages lead into or through the
body of water in the boiler, these passages being, when required, provided with
check valves to prevent return of water from the boiler into the fire-box. The
hot, products of combustion, in passing through the water of the boiler, generate
steam, and the mixture of steam and partly cooled products of combustion which
collects in the upper part of the boiler, constitutes the elastic fluid, which may be
employed to work engines The furnace and boiler are fed by pumps which may
be connected to an engine worked by the elastic fluid, the surplus power of the
engine being available for other purposes. Or, part of the elastic fluid generated
may be employed to work a separate feeding engine, the rest being available for
other engines. The gas may be produced under pressure as described in the
Specification to Letters Patent granted to me on the 27th May 1882, No. 2527, in
which case it is necessary to pump the air only. The supply of air and gas and
consequently the generation of fluid may be governed by regulating the speed of
the pumping engine; and this may be done automatically by connecting the
throttle or regulating valve of the pumping engine to a piston loaded to the
maximum pressure desired, and subjected to the pressure of the fluid in the generator,
so that when this pressure exceeds the load, the piston moves closing more or less
the regulating valve. For first starting the combustion within the fire-box, it may
be provided with an outlet or chimney which, when the contents of the boiler have
become sufficiently heated, can be closed by a valve. The combustion chamber
may have an aperture closed by a valve for giving access to ignite the gaseous
mixture, or the ignition may be effected by electricity or igniting apparatus, such
as is employed in gas motor engines.
Fig: 1 of the accompanying drawings is a longitudinal section, Fig. 2 is a
transverse section, and fig 3 a sectional plan of a single acting pumping engine
combined with a generator according to my invention. The cylinder A is placed
within a water casing B, and above it, within the water casing, is placed the com-
bustion chamber C, which is lined with refractory material. The rear end of the
cylinder A has a port governed by a slide D, the casing of which communicates by
a pipe E, with the upper part of the generator G. Within the generator is a pipe
coil F open at the bottom to the combustion chamber, and at the top to the space
above the water. The front end of the cylinder A acts as an air compressing
pump having a suction valves and a discharge valve d opening into a compressed
air chamber H. In front of the larger part of the piston rod, the barrel in which it
works serves as a gas pump, compressing the gas into a chamber I. A pipe i
leads from this chamber to a nozzle opening into the combustion chamber C, and at
this nozzle the gas is ignited receiving its supply of air for combustion from the
chamber H. The bot products of the combustion in C ascend through the coil F,
heating the surrounding water and generating steam, and the mixture of steam and
products of combustion pass from the top of the generator to work the engine. The

page_text: engine may be made double acting, as shewn by the longitudinal section fig. 4, the
working cylinder A being separated from the pump P, which forces air into the
combustion chamber C, the gas being supplied either by a separate pump, or from
a producer where it is produced under pressure.
Having thus described the nature of my invention and in what manner the
same is to be performed, I claim :-
Apparatus for generating elastic fluid, consisting of a combustion chamber in
which combustible gas and air are burned under pressure, and a boiler or generator
in which the products of combustion heat water and generate steam, the mixture
of the products of combustion with the steam generated by them constituting
elastic fluid under pressure, available for working engines, substantially as herein
described.
In Witness whereof, I the said Henry Davey have hereunto set my hand and
seal this fifth day of February, in the year of our Lord, one thousand
eight hundred and eighty three.
HENRY DAVEY (L.S.)