GENERATING STEAM FOR STEAM ENGINES AND OTHER PURPOSES WHERE STEAM UNDER PRESSURE IS REQUIRED."
Year: 1878

page_text: PROVISIONAL SPECIFICATION left by William Pellew Bain and Alma
Lousignan Hopcraft at the Office of the Commissioners of Patents on the
3rd April 1878.
WILLIAM PELLEW BAIN, of 15, Brunswick Street, Poplar, Physician, and ALMA
"IMPROVEMENTS IN
LOUSIGNAN HOPCRAFT, of South Park, Ilford, Engineer.
GENERATING STEAM FOR STEAM ENGINES AND OTHER PURPOSES WHERE STEAM
UNDER PRESSURE IS REQUIRED."
This Invention of improvements in generating steam for steam engines and other
purposes where steam under pressure is required, consists in forcing or using pres-
sure by means of a force pump or other suitable engine, so that the heated gas and
products of combustion as they come from the burning fuel or after passing through
or over some of the internal flues or surfaces of a boiler are forced into the waiter to
be heated and generated into steam. In this way we get a much higher result
from the fuel burnt, inasmuch as the heat is brought into direct and more intimate
contact with the water than as in the ordinary way, where the heated gases impinge
upon the boiler plates, and the heat has to pass through the substance of the plates
or tubes forining the boiler before the water can receive it.
We carry out this principle in several ways, but one which we will describe is as
follows:-
-We take an ordinary vertical boiler, say with internal fire chamber, and
we make this fire chamber a close one by closing the doors where the fuel enters,
and by closing the aperture below the bars with a continuation of the water spaces
or iron plates, or in any suitable manner; in communication with this chamber,
below the fire bars, we have a pipe or conduit, and this pipe communicates with a
piston blower, driven by an engine, which may be a separate engine, or the blower
may be driven by the surplus power of the engine to be driven by the steam to be
generated under the improved inethod. The products of the combustion are then
led off, not into the chimney, which is now stopped off, but led by suitable pipes
The steam is very rapidly gene-
dipping into the water enclosed in the boiler.
rated in this way, and the steam and the waste products mingled together are
utilised to drive any steam engine in the ordinary way.

page_text: Whore a separate engine is not used, and it is intended only to use the one engine,
suitable valves to prevent return pressure are fitted, and the boiler may be used in
the ordinary way to get the fire lighted and the steam raised, and then the chimney
communications and ash-pit openings and doors are closed and the blower put in
action.
We are aware that mixed products of combustion and steam have been used to
drive steam engines, and that the products of combustion have been used to evapo-
rate liquids by leading them over the surface of such liquids; but our Invention
does not relate to those two matters, but simply to driving the heated products of
combustion, as described, into the water in a closed boiler for the purpose of gene-
rating steam under pressure, for use in steam engines, and for other purposes where
steam under pressure is required, such as for heating buildings, drying, or such like
purposes.