IMPROVEMENTS IN COMBINED AIR, STEAM, AND CALORIC ENGINES
Year: 1874

page_text: PROVISIONAL SPECIFICATION left by Robert Mudge Marchant at the
Office of the Commissioners of Patents, with his Petition, on the
18th September 1874.
I, ROBERT MUDGE MARCHANT, of Kirby Street, Hatton Garden, in
the County of Middlesex, Civil Engineer, do hereby declare the nature
of the said Invention for "IMPROVEMENTS IN COMBINED AIR, STEAM, AND
CALORIC ENGINES," to be as follows:-
:-
This Invention has special reference to the combined air, steam, and
caloric engine described in the Specifications of Letters Patent granteḍ
to me dated the 9th February 1874, No. 509.
In a former Invention for which Letters Patent were granted to me
dated the 13th April 1870, No. 1086, I provided an economical system
of pumping any gas or combination of gases in stages of compression,
and described the manner of working the same, and apparatus used
therein; and in another Invention for which Letters Patent were
granted to me dated the 25th July 1871, No. 1949, I provided a regulator
to facilitate the operation of re-pumping any once used and heated.
exhaust and other apparatus employed in working the said Invention.

page_text: Continued experiments subsequently led me to the perfection of the
application of such Inventions in the use in combination of air, steam,
_and caloric, for the purpose of generating and developing motive power,
the air and steam being made the medium of continuing the circulation
of all for continuous use through a boiler or heater in which the caloric,
which has been expended, is renewed or recovered for every subsequent
operation. In the Specification of the Letters Patent before mentioned
which were granted to me, dated the 9th February 1874, I described a
combined air, steam, and caloric engine, which embodied the improve-
ments above referred to.
Now the present Invention consists in the application and adaptation
of the stage process pumps, herein-before mentioned, to the manufacture
of gas from oil, with a limited proportion of water, so that such gas
may be used as fuel in the said combined air, steam, and caloric engine,
the means of regulating the fire being. thereby much simplified and
improved, and no stoking being required. In carrying out this Inven-
tion the oil (with the limited proportion of water) is placed in the several
pump chambers, and air is pumped through it, according to the stage
process before referred to; the air becomes during its passage impreg-
nated with vapor from the oil, and from the water mixed therewith,
and it leaves the last pump chamber in the form of an inflammable
mixture, or air gas, which I conduct through any suitable channel or
channels, and regulators to the fire of the engine where I utilize it as
fuel, as herein-before stated.
:
The present Invention further consists in making the chimney or
chimneys of the heater or boiler of the said combined air, steam, and
caloric engine, deliver the exhausted products of combustion in their still.
heated state underneath the fire or flame, so that such heated products
shall be continually circulated through the fire, while the heavy and in-
flammable portion of the heated products becomes separated by virtue of
its own gravity, and is delivered into the external atmosphere, a further
supply of fresh air combining with the heated and inflammable portion
of the products with every renewed circulation.