Improvements in or connected with Low Pressure or Condensing Engines.
Year: 1894

page_text: Date of Application, 14th June, 1894
Complete Specification Left, 14tn Mar.. 1895-Accepted, 20th Apr., 1895
PROVISIONAL SPECIFICATION.
Improvements in or connected with Low Pressure or Condensing
Engines.
We, JAMES ASHWORTH and JAMES ASHWORTH Junior both of Mouzell Mines
Dalton-in-Furness in the County of Lancaster Mining Engineers do hereby declare
the nature of this invention to be as follows:-
:-
The object of this invention is to utilise the heat of the steam which exhausts
from the cylinders of low pressure or condensing engines and so effect economy in
the consumption of fuel.
According to this invention we place between the engine and the condenser a
device consisting of a number of tubes or of surfaces otherwise arranged so that
water can be passed in contact with one side thereof whilst the exhaust steam
passing from the engine to the condenser comes in contact with the other side
thereof. The water thus becomes highly heated by the heat of the exhaust steam
and the water so heated may be passed into the boiler or used for other purpose..
The device by which the water is so heated may be placed in any convenient
position between the engine and the condenser.
Deted this 14th dor of June 1801
JOHNSONS & WILLCOX,
47, Lincoln's Inn Fields, Agents.
Improvements in or connected with Low Pressure or Condensing
Engines.
We JAMES ASHWORTH and JAMES ASHWORTH Junior both of Mouzell Mines,
Dalton-in-Furness in the County of Lancaster Mining 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 :-
The object of this invention is to utilise the heat of the steam which exhausts
from the cylinders of low pressure or condensing engines and to effect economy in
the consumption of fuel.
According to this invention we place between the engine and the condenser a
device consisting of a number of tubes or of surfaces otherwise arranged so that
water can be passed in contact with one side thereof whilst the exhaust steam
passing from the engine to the condenser comes in contact with the other side.
thereof. The water thus becomes highly heated by the heat of the exhaust steam
and the water so heated may be passed into the boiler or used for other purpose.
The device by which the water is so heated may be placed in any convenient
position between the engine and the condenser.

page_text: '
The accompanying drawing represents the best means with which we are
acquainted for carrying out our invention but we do not restrict ourselves to the
arrangements shown.
Figures 1 and 2 are respectively a longitudinal section and a transverse section
of an arrangement of tubes through which the exhaust steam from the cylinders of
low pressure engines is caused to pass on its way to the condenser and heat water
with which the tubes are surrounded.
Figures 3 and 4 are similar views of another arrangement in which the exhaust
steam pipe passes through a chamber containing the water to be heated.
Figures 5 and 6 are similar views of another arrangement wherein the exhaust
steam on its way to the condenser passes through a chamber in which is contained
another chamber containing the water to be heated by the said exhaust steam and
Figures 7 and 8 shew another form of water heater having transverse heating
surfaces.
In Figures 1 and 2 A represents the exhaust steam pipe from a low pressure
engine connected to one end a of a cylindrical vessel B through which the water to
be heated is caused to pass. To the opposite end of this cylindrical vessel is
connected a pipe A2 leading to the condenser the connection of the pipe A with the
pipe A being through tubes C passing through the cylinder B and secured to
the ends a b thereof the said ends constituting tube plates. Water is admitted to the
interior of the cylinder B by the pipe c and is discharged therefrom by the pipe d.
As the exhaust steam passes through the tubes C on its way to the condenser it
imparts heat to the water in the cylinder with which they are surrounded and the
water so heated may be employed for feeding the boiler or for other purposes.
Instead of the tubes C as described the exhaust steam pipe A may pass through
the cylinder B as shown in Figures 3 and 4 and thence to the condenser, the water
in the cylinder B being heated by the said exhaust steam in its passage through the
said pipe.
In the arrangement shown in Figures 5 and 6 the cylinder B in which the water
is heated is contained in an outer cylinder C, an annular space e being provided
between the said cylinders through which the exhaust steam from the low pressure
engines is caused to pass on its way to the condenser, the said cylinder C being
connected at one end to the exhaust pipe A from the engine and at its other end to
the pipe A leading to the condenser. Water is admitted to the cylinder B by the
pipe c and is drawn therefrom by the pipe d the said pipes c and d passing through
the space between the cylinders B and C. The water in the cylinder B becomes
highly heated by the surrounding exhaust steam passing through the space between
the two cylinders, and may be fed direct into the boiler or be used for other
purposes.
Instead of the chambers B and C being cylindrical they may be any other suitable
form, for instance, they may be rectangular as shewn in Figures 7 and 8 and they
may be provided with transverse tubes or passages C' presenting additional surfaces
for the exhaust steam to act on in its passage to the condenser.
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
clain is :-
1. In connection with low pressure or condensing steam engines means for
utilising the heat of the exhaust steam in its passage from the low pressure cylinders
to the condenser for heating water substantially as hereinbefore described.
2. The combination with a low pressure steam engine and a condenser of a
chamber or vessel for containing water arranged between the exhaust port of the
engine and the condenser so as to become heated by the exhaust steam in its passage
to the condenser substantially as hereinbefore described.
3. The combination with a low pressure steam engine and a condenser of a water
beating device arranged in the exhaust steam passage from the steam engine to the

page_text: condenser the said heating device being constructed substantially as hereinbefore
described and illustrated in Figures 1 and 2, Figures 3 and 4, Figures 5 and 6, and
Figures 7 and 8 of the accompanying drawings.
Dated this 14th dex of March 1895
JOHNSONS & WILLCOX,
Agents.