Improvements in Stationary Compound Steam Engines.
Year: 1888

page_text: Date of Application, 4th Aug., 1888
Complete Specification Left, 30th Apr., 1889
Complete Specification Accepted, 8th June, 1889.
PROVISIONAL SPECIFICATION.
Improvements in Stationary Compound Steam Engines.
We, WILLIAM HARGREAVES, and WILLIAM INGLIS, of the Soho Iron Works, Bolton,
in the County of Lancaster, Engineers, do hereby declare the nature of this Invention
to be as follows, that is to say :-
Our said Invention has for its object to construct an improved compound steam
engine suitable for stationary purposes.
In carrying out our Invention we combine four cylinders so as to work with three
stages of expansion; and we connect the pistons of the cylinders to three cranks on a
shaft having on it a flywheel of suitable dimensions. A high-pressure or first-stage
cylinder, and an intermediate or second-stage cylinder are arranged tandem and in
connection with the middle crank; and two low-pressure or third-stage cylinders are
arranged each in connection with one of the outer cranks. The outer cranks are
diametrically opposite to the middle crank, and the cylinders are proportioned
relatively to each other so that the strain on the middle crank is approximately
balanced by the strains on the two outer cranks.
A 1000
.
We, WILLIAM HARGREAVES, and WILLIAM INGLIS, of the Soho Iron Works, Bolton,
in the County of Lancaster, Engineers, do hereby declare the nature of this Invention
to be as follows, that is to say :--
Our said Invention has for its object to construct an improved compound steam
engine suitable for stationary purposes.
In carrying out our Invention we combine four cylinders so as to work with three
stages of expansion; and we connect the pistons of the cylinders to three cranks on a
shaft having on it a flywheel of suitable dimensions. A high-pressure or first-stage
cylinder, and an intermediate or second-stage cylinder are arranged tandem and in
connection with the middle crank; and two low-pressure or third-stage cylinders are
arranged each in connection with one of the outer cranks. The outer cranks are
diametrically opposite to the middle crank, and the cylinders are proportioned
relatively to each other so that the strain on the middle crank is approximately
balanced by the strains on the two outer cranks.
Th
A 1000
EDMUND HUNT
Applicants' Agent.

page_text: COMPLETE SPECIFICATION
Improvements in Stationary Compound Steam Engines.
We, WILLIAM Hargreaves, and William Inglis, of the Soho Iron Works, Bolton,
in the County of Lancaster, Engineers, 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, that is to say :-
Our said Invention lus for its object to construct an improved compound steam
engine suitable for stationary purposes; and the main parts of such an engine is shown
in side elevation on an accompanying sheet of explanatory drawings.
In carrying out our Invention, we combine four cylinders, A,B,G, D, so as to work
with three stages of expansion; and we connect the pistons of the cylinders to three
cranks, E, F, G, on a shaft, H, having on it a flywheel, J, of suitable dimensions.
A. high-pressure or first-stage cylinder, A, and an intermediate or second-stage
cylinder, B, are arranged tandem and in connection with the middle crank, F; and
two low-pressure or third-stage cylinders, C, D, are arranged each in connection with
one of the outer cranks, E, G. The outer cranks, E, G, are diametrically opposite to
the middle crank, F, and the cylinders are proportioned relatively to each other so
that the strain on the middle crank, F, is approximately balanced by the strains on the
two outer cranks, E, G. The parts of the engine not fully shown or detailed in the
accompanying drawing or not particularised in the description hereinbefore given may
be constructed in any suitable known manner.
Having now particularly described and ascertained the nature of our said Inven-
tion and in what manner the same is to be performed, we declare that what we
claim is:-
In a stationary compound steam engine combining a flywheel, a shaft having three
cranks of which the outer ones are diametrically opposite to the middle one, a high-
pressure and an intermediate cylinder arranged tandem and to operate on the middle
crank and two low-pressure cylinders arranged to act on the outer cranks substantially
as hereinbefore described.
EDMUND HUNT,
Applicants' Agent.