Improvements in Steam or other Expansive Fluid-pressure Engines.
Year: 1892

page_text: Date of Application, 7th Oct., 1892
Complete Specification Left, 24th Nov., 1892-Accepted, 7th Jan., 1893
PROVISIONAL SPECIFICATION.
Improvements in Steam or other Expansive Fluid-pressure Engines.
JOHN KEMP 1 Ibrox Place Govan Glasgow Mechanical Engineer do hereby
declare the nature of this invention to be as follows:-
This invention relates to steam or other expansive fluid-pressure engines and the
object is to apply the quadruple expansion principle of driving. The 4 cylinder
pistons in the cylinders in which the quadruple expansion takes place are connected
in pairs by their separate piston rods to one crosshead from which the power is
transmitted by an ordinary connecting rod to the crank shaft. Each pair of
cylinders which are thus connected to one crosshead are placed alongside one
another. The crank shaft will thus have two cranks preferably at right angles to
one another. The centre line of action of the piston rods and connecting rods may
be placed at any required angle to the crank shaft. The centre line passing
through each pair of cylinders alongside of one another which act on the one crank
may be at any required angle to the crank shaft.
Dated this Fifth day of October 1892.
JOHN KEMP.
COMPLETE SPECIFICATION.
Improvements in Steam or other Expansive Fluid-pressure Engines.
I, JOHN KEMP of 1 Ibrox Place, Govan, Glasgow, Mechanical 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 relates to steam or other expansive fluid pressure engines and the
object is to apply the quadruple expansion principle of driving the pistons.
And in order that my said invention and the manner of performing or carrying
the same into effect or practice may be properly understood I have hereunto
appended an explanatory sheet of drawings illustrating my improvements as applied
to various examples of engines, and in which the same reference letters are used to
indicate corresponding parts in all the figures where shown.
Figures 1 and 2 are an end elevation and plan view respectively of a quadruple
expansion marine steam engine as adapted for driving screw propellers, and as
arranged and fitted in accordance with my improvements; Figures 3 and 4 are side
and end elevations respectively of a quadruple expansion marine steam engine
having the cylinders set diagonally for driving paddle wheels, and as arranged and
fitted in accordance with my improvements. Figure 5 is a side elevation of a
quadruple expansion steam engine analogous in the position of its cylinders to
Figure 2 as adapted for general motive power purposes, and as arranged and fitted
in accordance with my improvements. While Figures 6 and 7 are side and end
elevations respectively of a quadruple expansion locomotive steam engine with
outside cylinders, as arranged and fitted in accordance with my improvements, and
the improvements may be similarly applied if the locomotive be fitted with inside
cylinders. One design only is shown for each particular class of engine or purpose
but said design may be varied to suit arrangements that may be required for
particular cases.
The four pistons in the cylinders in which the quadruple expansion takes place
are connected in pairs by their separate piston rods a and b each pair to one cross-
head c by a fixed attachment such as by end screw nuts at m, and from which
.
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page_text: crosshead c the power is transmitted by an ordinary connecting rod d to the crank
shaft e.
The two cylinders ƒ and g or hand i which are thus connected to one
crosshead are placed alongside one another. The crank shaft e will thus have
two cranks k and 7 preferably at right angles to one another.
The centre line of action O, P, of the pistons and connecting rods through the
crank shaft e, may be placed either vertical or horizontal or at any required
angle.
The centre line R, S, passing through each pair of cylinders alongside of one
another which act on the one crank may be at any required angle to the crank
shaft e.
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. In quadruple steam or other expansive fluid-pressure engines the
arrangement and use of the piston rods of each pair of cylinders connected to one
crosshead, each crosshead actuating one crank, substantially as and in the manner
herein described, in reference to and by way of application shown in the
accompanying drawings.
Second. In quadruple steam or other expansive fluid-pressure engines, the
combination comprising four cylinders having the piston rods of each pair connected
to the same crosshead, and having the two crossheads each coupled by a connecting
rod to a separate crank on the crank shaft, substantially as and in the manner
herein described in reference to and by way of application shown in the
accompanying drawings.
Dated the 23rd November 1892.
W. R. M. THOMSON & Co.,
96, Buchanan Street, Glasgow, Agents.