IMPROVEMENTS IN MARINE STEAM ENGINES
Year: 1885

page_text: I GEORGE ALLIBON of Sea View, Litherland, in the County of Lancaster,
Engineer, do hereby declare the nature of the said invention for "IMPROVEMENTS
IN MARINE STEAM ENGINES, to be as follows
GYORS
My improvements have reference to marine steam engines in which two cylinders
with reciprocating pistons rods and the usual adjuncts are employed to act through
two cranks on one crank shaft
-
The invention is especially, although not exclusively, applicable to engines
of the compound type and has for its objects, amongst others, the following
First to obtain from a given volume of steam at desired pressure, more particu-
larly high pressure an increased duty, Second to secure a fair distribution of
parts as regards weight and resistance to strains, Third to provide easy access to
the working parts, and Fourth and generally to obtain economical working and
durable engines
The essential feature consists in constructing Engines with Cylinders and usual
parts having long and short strokes and consequently long and short cranks
In compound Engines of the largest type said feature is of great advantage
inasmuch as high pressure steam can act in the cylinder of smallest diameter
with longest stroke and subsequently act in the larger cylinder (or cylinders) with
shorter stroke
One modification under my invention has been designed to receive steam from
the boiler into a cylinder having a long stroke and subsequently employing the
steam in one or more cylinders having a short stroke or a short and still shorter
stroke
A second modification mainly devised for very high pressures and high powered
engines has a long stroke high pressure cylinder and two pairs of compound
ergines with shorter stroke, the latter to receive the steam which has first acted
on the piston in the long stroke high pressure cylinder
It is to be understood that in the use of the word steam I have included water
vapour whether used by itself or in admixture with gaseous or aeriform agents.
Dated this thirty first day of March 1885
J T KING,
Per J Johnson, Agent

page_text: I GEORGE AILIBON of Sea View Litherland, in the County of Lancaster
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
My improvements have reference to marine steam engines in which two or more
cylinders with reciprocating pistons rods and the usual adjuncts are employed to
act through two or more cranks on one crank shaft
The invention is especially, although not exclusively, applicable to engines of the
compound type and has for its objects, amongst others, the following First, to
obtain from a given volume of steam at desired pressure, more particularly high
pressure, an increased duty Second, to secure a fair distribution of parts as
regards weight and resistance to strains Third, to provide easy access to the
working parts and Fourth and generally, to obtain economical working and
durable engines
The essential feature consists in constructing engines with cylinders and usual
parts having long and short strokes and consequently long and short cranks.
In compound engines of the largest type said feature is of great advantage
inasmuch as high pressure steam can act in the cylinder of smallest diameter with
longest stroke, and subsequently act in the larger cylinder (or cylinders) with
shorter stroke
One modification under my invention has been designed to receive steam from
the boiler into a cylinder having a long stroke and subsequently employing the
steam in one or more cylinders having a short stroke or a short and still shorter
stroke.
A second modification mainly devised for very high pressures and high powered
engines has a long stroke high preasure cylinder and two pairs of compound
engines with shorter stroke, the latter to receive the steam which has first acted
on the piston in the long stroke high pressure cylinder
It is to be understood that in the use of the word steam I have included water
vapour whether used by itself or in admixture with gaseous or aeriform agents
DESCRIPTION OF THE DRAWINGS
Figs and 2 are elevations at right angles to each other of a marine steam
engine under my invention in which there is a long stroke high pressure cylinder a
and two short stroke low pressure cylinders bone at either side of the said
cylinder a, cd high pressure inlet and exhaust valve and ways, e f low pressure
inlet and exhaust valves and ways, 9 condensers, h high pressure crank which is
longer than the low pressure cranks jk bed plate and frame. The cranks are
shown at angles of 120° but may be otherwise set if desired, and the valve gear
and other parts may be of any suitable kind Steam exhausts from the high
pressure cylinder and passes into the ways leading to the low pressure cylinders,
and thence at the proper times past the valves into the said cylinders and the
condensers.

page_text: It will be easily seen that the above engine could be made with one low pressure
cylinder only or that one low pressure cylinder might have a shorter stroke than
the other and the connections so made that steam would pass from the high
pressure cylinder to the low pressure cylinder of shorter stroke and then to the
other, or as may be found most convenient
Fig 3 is an elevation of a marine engine under my invention in which two pairs
of compound engines consisting each of a high and low pressure short stroke
cylinders 6 6¹ are combined with a high pressure long stroke cylinder a In this
view like parts have the same letters of reference as in figs 1 and 2
It will be obvious that long and short stroke high and low pressure cylinders
may be combined in numerous ways under my invention
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed I declare that what
I claim is
First. The combination in marine engines of cylinders and adjuncts having long
and short strokes
Second The combination in marine engines of high pressure long stroke, and
low pressure short stroke cylinders and adjuncts
JT KING,
Per J Richman,
Agent for the Applicant