Improvements in Steam Engines.
Year: 1888

page_text: Date of Application, 31st Oct., 1888
Complete Specification Left, 31st July, 1889-Accepted, 14th Sept., 1889
PROVISIONAL SPECIFICATION.
Improvements in Steam Engines.
I, GEORGE WILLIAM HART 3 Buckingham Road Harlesden Middlesex, Engineer
do hereby declare the nature of this invention to be as follows:-
I cause by means of a partial vacuum, created by a fan or other equivalent (and
either in combination with, or without, a plenum, in retorts or furnaces used for
generating steam) the products of combustion of fuel to pass from such retorts or
furnaces through boilers or steam generators into casings or jackets surrounding
engine cylinders for the purpose of maintaining uniform high temperature of the same
and the steam used therein.
I construct engines with oscillating cylinders having piston rods extending through
both end covers of such cylinders and directly connected with cranks upon the
propelling shafts of twin screws for propelling same in opposite directions of rotation.
I construct engines with interposed cushions of air between the steam pistons and the
pistons of cylinders of engines propelling vessels for the purpose of using such air
for refrigerative purposes after it has been employed in propelling the pistons of the
driving engines actuating screw propeller shafts.
Dated this 30th day of October 1888.
G. WILLIAM HART.
COMPLETE SPECIFICATION.
Improvements in Steam Engines.
I GEORGE WILLIAM HART of 3 Buckingham Road, Harlesden Middlesex, Engineer
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:
By means of a partial vacuum created by exhaust fans or other equivalent and
with or without combination with a plenum in Gas Generators or Furnaces 1 cause
the Gaseous products of combustion to pass continuously from retorts or furnaces
into combustion chambers in Steam Generators and thence into and through the jackets
or casings of the Cylinders of Engines for the purpose of maintaining such cylinders
and the Steam therein at uniform temperature during expansion.
Having now particularly described and ascertained the nature of my said Inven-
tion and in what manner the same is to be performed I. declare that what 1
claim is
The employment of heated gases in the cylinder casings or jackets of steam
engines, for the purpose of maintaining such cylinders and the steam therein at
uniform temperature during expansion.
2. Connecting by pipes or passages, the cylinder casings or jackets of steam
engines with the furnaces, combustion chambers, or uptakes, of steam generators, so
that the products of combustion pass through such cylinder casings or jackets before
entering the funnel or chimney of such engines, for the purpose aforesaid.
3. The use of exhaust fans, or equivalent, (with or without a plenum in gas
generators or furnaces) to create a current of such heated gases from furnaces,
combustion chambers, or uptakes, of steam generators through such cylinder casings

page_text: of steam engines before entering the funnel or chimney of such engines, for the
purpose aforesaid of maintaining the engine cylinders and steam therein at uniform
temperature during the expansion of such steam within the cylinders.
Dated this Thirty first day of July One thousand eight hundred and eighty nine.
G. WILLIAM HART.