Improvements in Quadruple Expansion Engines.
Year: 1890

page_text: Date of Application, 26th N v., 1890
Complete Specification Left, 5th Mar., 1891-Accepted, 11th Apr., 1891
PROVISIONAL SPECIFICATION.
Improvements in Quadruple Expansion Engines.
I, LAUCHLAN GRANT MCFARLANE, Premier Place, Albert Street, Dundee,
Forfarshire, Engineer, do hereby declare the nature of this invention to be as
follows:-
This invention which relates to quadruple expansion engines consists of an
arrangement of the cylinders and cranks whereby great compactness is ensured, the
fore and aft space occupied on board ship by the engines being reduced to a
minimum.
In carrying out the invention, I arrange the four cylinders in pairs athwartships
or transversely of the crank shaft the cylinders on one side of the shaft being placed
to a slight extent fore or aft of those on the opposite side of the shaft in order that
they may be in line with their respective cranks and the pistons may act in
approximately vertical lines on the cranks. The cranks which may either be solid
or built on the shaft are so placed in relation to each other that when one piston of
each pair is at the upper end of its stroke the other piston is at the lower end, the
cranks for each pair of cylinders being connected by a link or web. A single valve
casing is provided for each pair of cylinders.
Dated this Twenty-fifth day of November 1890.
CRUIKSHANK & FAIRWEATHER,
62, St. Vincent Street, Glasgow, Agents.
COMPLETE SPECIFICATION.
Improvements in Quadruple Expansion Engines.
I, LAUCHLAN GRANT MCFARLANE, of Premier Place, Albert Street, Dundee,
Forfarshire, 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 :-
This invention which relates to quadruple expansion engines, consists of an
arrangement of the cylinders and cranks, whereby great compactness is ensured, the
fore and aft space occupied on board ship by the engines being reduced to a
minimum.
As represented in end and side elevations at Figures 1 and 2 and in plan at
Figure 3 of the accompanying drawings which illustrate my invention, I arrange
the four cylinders A' A2 A3 A', in pairs athwartships or transversely of the crank
shaft B, the cylinders A', A2, on one side of the shaft, being placed to a slight
extent fore or aft of those A³ A' on the opposite side of the shaft in order that they
may be in line with their respective cranks C1, C2, C3, C4, and the pistons may
act in approximately vertical lines on the cranks.
The cranks C C C³ C₁, which may either be solid or built on the shaft B are so
placed in relation to each other that when one piston of each pair is at the upper
end of its stroke the other piston is at the lower end, the cranks for each pair of
cylinders being connected by a link or web c.
A single valve casing D D is provided for each pair of cylinders.

page_text: 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 I
claim is :-
:-
A quadruple expansion engine constructed arranged and connected to a crank
shaft, substantially as described with reference to the accompanying drawings.
Dated this Fourth day of March 1891.
CRUIKSHANK & FAIRWEATHER,
62, St. Vincent Street, Glasgow, Agents.