Year: 1887

page_text: Date of Application, 8th Oct., 1887
Complete Left, 26th June; 1888
Complete Accepted, 27th July, 1888
We JESSE AINSWORTH STOTT and ABRAHAM HENTHORN STOTT, Junior, of 5 Cross
Street Manchester, in the County of Lancaster, Architects and Consulting Engineers,
do hereby declare the nature of the said invention to be as follows:-
Our invention relates to stationary triple expansion steam Engines for driving.mill
gearing and other purposes and consists in a combination and arrangement by which
the weight of driving wheels and the strains are distributed and a more uniform
rotary motion is obtained.
There are two crank shafts placed with their axes in line and end to end, and in
separate bearings and there are two separate or combined fly and rope or belt driving
wheels or separate or combined fly and toothed driving wheels, and one of these is fixed
on each crank shaft, or a fly wheel is or may be placed on one shaft, and driving gear
on the other shaft.
There is a crank at each end of each crank shaft, but the two cranks coming
together between the two shafts have only one crank pin between them one end of
which is fast in one crank and the other end is free in a short slot in the other
crank.
By preference the low pressure piston is connected with the middle two cranks that
come together, and the high pressure piston is connected with one outside crank and
the middle pressure piston with the other outside crank, the three cranks being
arranged at an equal distance, that is, 120 degrees apart.

page_text: COMPLETE SPECIFICATION.
Improvements in Stationary Steam Engines.
We JESSE AINSWORTH STOTT and ABRAHAM HENTHORN STOTT Junior of 5 Cross
Street, Manchester, in the County of Lancaster, Architects and Consulting 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:
Our invention relates to Stationary triple expansion steam Engines for driving mill
gearing and other purposes and consists in a combination and arrangement by which
the weight of the fly and driving wheels and the strains are distributed and a more
uniform rotary motion is obtained.
There are two crank shafts placed with their axes in line and end to end and in
separate bearings and there are two separate or combined fly and rope or belt driving
wheels or separate or combined fly and toothed driving wheels and one of these is
fixed on each crank shaft or a fly wheel is or may be placed on one shaft and driving
gearing on the other shaft.
There is a crank at each end of each crank shaft but the two cranks coming
together between the two shafts, have only one crank pin between them one end of
which is fast in one crank and the other end is by preference free in a short slot in
the other crank but may be fast in both cranks. Two of the modes of carrying out
our invention are illustrated by the accompanying drawings in which fig. 1 is a side
elevation in a plane at a right angle to the crank shaft; fig. 2 an end elevation in a
plane parallel to the crank shaft and looking towards the cylinders and fig. 3 is a plan
view, showing one modification according to our invention where horizontal steam
cylinders are used.
There are two independent crank shafts cach in two separate bearings with a wheel
or wheels placed on each of the crank shafts and the wheel or wheels placed on each
of the crank shafts are used as fly wheels and also for transmitting the power from
the engine by being prepared with cogs for tooth driving, or by being prepared for
belt or rope or other means of driving or a combination of different means of driving
or the wheel or wheels on one shaft may be used as a fly wheel or wheels only and
the wheel or wheels on the other shaft used for transmitting the power from the
engine in manner last described.
We prefer where the two crank shafts come together end to end the crank pin to
be secured. in one crank and its end to be arranged in a short slot in the direction or
in a slide block which can move in the crank arm in a radius line from the axis of
the crank shaft thus.leaving both cranks free and preventing strains arising from the
departure, from wear or any cause; of the axes of the two shafts from an exact straight
line one with the other.
We prefer to use three cylinders only and for convenience in passing the steam
from one steam cylinder to the other in succession in the order required, the high
pressure cylinder is on one outside crank the medium cylinder is on the middle crank

page_text: and the low pressure cylinder is on the other outside crank .as illustrated but the
number of cylinders and their arrangement on the three cranks may be varied, as
there may be two high pressure cylinders, or two intermediate cylinders, or two
low pressure cylinders, the steam being used first in the high then in the medium
and lastly in the low pressure cylinder or cylinders whether one or moro cylinders
be adopted for each successive use of the steam.
We prefer the cranks to be set at 120 degrees apart but they may be set at any
other angle and the valves, and valve gearing, air pump, condensers and other parts
of compound steam Engines are arranged and worked in any ordinary manner.
Figs. 4, 5 and 6 are views corresponding respectively to figs. 1, 2 and 3 (except
that fig. 6 is a plan section below the cylinders) illustrating an arrangement according
to our invention when the steam cylinders are vertically over the cranks, which triple
expansion compound steam Engines, in other respects are arranged as hereinbefore
described in respect to figs. 1, 2 and 3. a represents the air pump which is or may
be worked by a lever connected by a link with the piston rod of the low pressure
cylinder, the exhaust steam from the low pressure cylinder being supposed to pass
from its exhaust port down the hollow of one of the supporting columns for carrying
the cylinder.
But the air pump, condenser and other parts of triple expansion compound steam
Engines are or may be arranged in any ordinary manner.
The illustrative drawings will be readily understood without further explanation.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed we declare that what
we claim is:
.
The combination of three or more compound triple expansion steam cylinders
forming a stationary steam, Engine where the steam after use in the high pressure
steam cylinder or cylinders is taken to the medium steam cylinder or cylinders and
then to the low pressure steam cylinder or cylinders the piston rods from the pistons
working in such steam cylinders being connected with three cranks on two shafts
having independent bearings with a wheel or wheels on each shaft, such wheels
being used as fly wheels and any or all of them being used to transmit the power
by being prepared with cogs for tooth driving or by being prepared for belt or ropo
or other means of driving substantially as herein before described and illustrated by
the drawings.
Dated this 25th day of June 1888.