Improvements in Compound Steam or other Fluid Pressure Engines.
Year: 1898

page_text: PROVISIONAL SPECIFICATION.
Improvements in Compound Steam or other Fluid Pressure Engines.
We, GALLOWAYS LIMITED, HENRY FOSTER, and ALFRED ETCHELLS, all of Knott
Mill Iron Works, Manchester, in the County of Lancaster, Engineers, do hereby
declare the nature of this invention to be as follows:-
This invention relates to compound engines worked by steam or other elastic
fluid and has for its object a construction and arrangement of the slide valves and
ports in such a manner that there are small clearances to both the high and the
low pressure cylinders, adequate intermediate receiver space, effective draining
of cylinders, facility of adjustment and simplicity of construction.
The high and low pressure cylinders together with their valve chests are pre-
ferably made in one casting, the two valve chests being so situated that the axes
of the piston valves working in them are in a plane at right angles to the plane
in which are situated the axes of the two cylinders. Both slide valves, which are
hollow of double piston kind, are worked by a single excentric.
As the valve chests are situated on each side of the medial line joining the
centres of the cylinders, the distance of the cylinders from each other is less thar
if the valve chests were situated in the medial line, and thus the lateral couple
acting on the crankshaft is proportionally reduced, while at the same time, each
valve being close to its cylinder, the steam ports are short, and there is adequate
receiver space.
The distribution of the steam or working fluid is as follows:-The high pressure
fluid is first led round the waist of the high pressure valve, and thence, as the
valve moves to and fro, past the inner edges of the piston parts into the two
ends of the high pressure cylinder alternately. The exhaust from the high
pressure cylinder flows past the outer edges of the piston parts into receiver
chambers at both ends which freely communicate with each other through the
central passage of the high pressure valve, and also that of the low pressure
valve.
From these intermediate chambers the fluid is led past the outer edges of the
piston parts of the low pressure piston valve into the low pressure cylinder, the
exhaust from which flows past the inner edges of the piston parts of the low
pressure valve into the chamber surrounding the waist of the valve and thence
passes away by the exhaust pipe.
Dated this 22nd day of March 1898.
Improvements in Compound Steam or other Fluid Pressure Engines.
We, GALLOWAYS LIMITED, HENRY FOSTER, and ALFRED ETCHELLS, all of Knott
Mill Iron Works, Manchester, in the County of Lancaster, Engineers, do hereby
[Price 8d.]

page_text: declare the nature of this invention and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement:-
This invention relates to compound engines worked by steam or other elastic
fluid and has for its object a construction and arrangement of the slide valves and
ports in such a manner that there are small clearances to both the high and the
low pressure cylinders, adequate intermediate receiver space, effective draining
of cylinders, facility of adjustment and simplicity of construction.
Fig.
of the accompanying drawings is a sectional plan of the cylinders and
valve chests of a compound engine according to this invention. Fig. 2 is a section
on the line 2-2, and Fig. 3 is a section on the line 3-3 of Fig. 1.
The high and low pressure cylinders H and L together with their valve chests h
and are preferably made in one casting, the two valve chests being so situated
that the axes of the piston valves working in them are in a plane at right angles
to the plane in which are situated the axes of the two cylinders. Both slide
valves, which are hollow of double piston kind, are worked by a single excentric.
As the valve chests are situated on each side of the medial line joining the
centres of the cylinders, the distance of the cylinders from each other is less than
if the valve chests were situated in the medial line, and thus the lateral couple
acting on the crankshaft is proportionally reduced, while at the same time, each
valve being close to its cylinder, the steam ports are short, and there is adequate
intermediate receiver space.
The
The distribution of the steam or working fluid is as follows:-The high pressure
fluid entering at S is first led round the waist of the high pressure valve h and
thence, as the valve moves to and fro, past the inner edges of the piston parts into
the two ends of the high pressure cylinder H by the ports s alternately.
exhaust from the high pressure cylinder flows past the outer edges of the piston
parts into receiver chambers R R¹ at both ends which freely communicate with
each other through the central passage of the high pressure valve h.
From these intermediate chambers R R the fluid is led past the outer edges of
the piston parts of the low pressure piston valve into the low pressure cylinder L
by the ports e, and the exhaust from the low pressure cylinder flows past the..
inner edges of the piston parts of the low pressure valve into the chamber
surrounding the waist of that valve and thence passes away by the exhaust pipe E.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, we declare that what we
claim is:
The construction and arrangement of the cylinders and valve chests of a
compound steam or other fluid pressure engine, substantially as described with
reference to the drawings.
Datod this 14th day of December 1898.
ABEL & IMRAY,
Agents for the Applicants,