Improvements in Apparatus for Condensing the Exhaust Steam or Portion of the Exhaust Steam in Self-propelling or other Steam Engines.
Year: 1893

page_text: Date of Application, 2nd Sept., 1893
Complete Specification Left, 23rd June, 1894-Accepted, 18th Aug., 1894
PROVISIONAL SPECIFICATION.
Improvements in Apparatus for Condensing the Exhaust Steam or
Portion of the Exhaust Steam in Self-propelling or other Steam
Engines.
STEPHEN HARDING TERRY 17 Victoria Street Westminster, S.W. Civil
Engineer do hereby declare the nature of this invention to be as follows:-
:-
This invention has principally for its object the recovery of a portion or all of
the water in the exhaust steam so as to economise the volume of feed water required
for engines when working in places where water is scarce such as agricultural &
road locomotives, steam rollers, ploughing engines, thrashing engines &c. among
self moving engines also for electric light engines & other engines employed for
producing power where water for condensation is not available. This apparatus
consists of a tank or tanks containing the feed water into which tank or tanks,
enters the exhaust steam or a portion of the same may enter in an independent pipe
or pipes or may enter in conjunction with the water supply or the water of the tank
may by means of a pump or otherwise be circulated and mixed with the exhaust
steam before it flows back into the tank. In the tank are a number of tubes which
are expanded into or otherwise attached to 2 tube plates one at each end of the
tank. Through these tubes a portion or the whole of the air supply to the fires
is drawn, either by the action of a portion of the exhaust steam in the chimney or
by the pressure or vacuum produced by a fan or steam jet or other mechanical
means. The air so drawn through the tubes abstracts heat from the water &
steam in the tanks & prevents the temperature rising beyond a certain point and
the steam so condensed reduces the volume of feed water which has to be provided.
I provide suitable means for adjusting and controlling the flow of air to the fire &
for circulating the steam and water in the tank.
Dated this 1st day of September 1893.
STEPHEN HARDING TERRY,
17, Victoria Street, Westminster, London, S.W., Civil Engineer,
COMPLETE SPECIFICATION.
Improvements in Apparatus for Condensing the Exhaust Steam or
Portion of the Exhaust Steam in Self-propelling or other Steam
Engines.
I STEPHEN HARDING TERRY Engineer 17, Victoria Street, Westminster
London S.W. 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 has for its principal object the recovery of a portion or all of
the water in the exhaust steam so as to economise the volume of feed water
required for engines when working in places where water is scarce, such as
agricultural & road locomotives railway locomotives, ploughing engines threshing
engines &c. among self moving engines, also for electric light & other engines
employed for producing power where water for condensation is not available.
Other advantages of this invention are
(a) Economy of fuel by partial warming of air for combustion by the waste heat
in the steam.
(b) Silencing the exhaust in places where noise of exhaust steam is objectionable.
This apparatus consists of a tank or tanks containing feed-water, into which

page_text: The exhaust
tank or tanks enters the exhaust steam or a portion of the same.
steam may enter in an independent pipe or pipes or may enter in conjunction with the
water supply, or the water of the tank may by means of a pump or otherwise be
circulated and mixed with the exhaust steam before it flows back into the tank.
In the tank are a number of tubes which are expanded in or otherwise attached
to two tube plates, one at each end of the tank. Through these tubes, a portion,
or the whole of the air supply to the fires is drawn, either by the action of a portion
of the exhaust steam in the chimney, or by the pressure or vacuum produced by a
fan, or by a steam jet or other mechanical means.
The air so drawn abstracts the heat from the water and steam in the tank
and prevents the temperature from rising beyond a certain point, and the steam
so condensed reduces the quantity of feed-water which has to be provided.
The heat units abstracted by the air from the water whilst passing through the
tubes raise the temperature of combustion with a given quantity of fuel, or cause
the same temperature to be attained with a less consumption of fuel, so attaining
economy.
I provide suitable means for adjusting and controlling the flow of air to the fire
through the tubes, and for circulating the steam and water in the tank.
Figure 1 represents my apparatus as fitted to a road locomotive.
AA is the feed water tank.
BB are tubes through which the air passes on its way to the fire.
CC is the pipe through which the exhaust steam enters the tank with the overflow
from the feed pump.
DD are the dampers by which the air supply is controlled so as to draw either
through the tubes or direct.
E is the exhaust steam pipe leading to the tank controlled by the throttle valve F.
The exhaust steam pipe may lead direct from the centre of the cylinder at G.
Figure 2 shows an arrangement for blowing air through the tubes, by this means
the whole of the exhaust steam can be passed to the condenser, none being required
in the funnel for producing draught.
In this arrangement the other parts of the apparatus remain as shown in Fig. 1,
and in addition to them is a fan H, bolted to the side of the tank or tender or
otherwise placed so as to blow the air into the outer casing I.
J is a door controlling the volume of air which is required to pass through the
tubes and also serves to admit air to the tubes when the fan is not running.
The fan as shown is driven by a spring band from a pulley inside the fly wheel,
but it may equally well be driven by a belt or by an independent engine.
Having now particularly described and ascertained the nature of this inven
tion and in what manner the same is to be performed I declare that what I
claim is
(1.) A method of condensing the whole or a portion of the exhaust steam of a
steam engine by means of an arrangement of air pipes in the feed tank, through
which pipes the air supply of the fire is passed, the exhaust steam or a portion
thereof being passed into the feed tank.
(2.) The provision of suitable valve or valves for the control of the exhaust
steam in connection with this apparatus.
(3.) The circulation of the steam and water in the tank by means of the overflow
from feed pump or other pump in connection with this apparatus.
(4.) The arrangement of dampers for the control of the air supply in connection
with this apparatus.
(5.) The use of a fan either direct driven by separate engine or by belt in this
combination and for the purposes described.
02 Tun 1904
STEPHEN HARDING TERRY,
17, Victoria Street, Westminster, S.W.