Year: 1899

page_text: I, The Honourable CHARLES ALGERNON PARSONS, of Heaton Works, Newcastle-
on-Tyne, in the County of Northumberland, Engineer, do hereby declare the
nature of this invention to be as follows -
My invention relates to feed water heaters, heated by steam, which steam is
ultimately condensed by a surface o jet condenser. The invention is specially
applicable to feed water heaters used with marine engines where steam is supplied
to the feed water heater from the exhaust of the auxiliary engines In feed
water heaters so connected the temperature of the steam is rapidly reduced
because of the reduction of steam pressure towards the pressure within the surface
condenser.
The object of my invention is to maintain the pressure of the steam while it
is within the feed water heater, and thereby to heat the feed water to a higher
temperature than is otherwise possible.
My invention consists in interposing a sufficient resistance between the feed
water heater and the condenser. This I preferably effect by means of a loaded
valve The loaded or relief valve allows steam to discharge to the condenser
whenever it attains the desired pressure. This enables me to maintain a higher
pressure within the feed water heater than that of the condenser, and so permits
the feed water to be heated to a higher temperature.
In carrying my invention into effect according to one method,
pass exhaust
steam from the auxiliary engines of a ship to the feed water heater, and I fit a
loaded or relief valve on the overflow steam pipe from the heater to the ships'
main condenser or hot well.
By the use of this valve the exhaust steam in the heater can be maintained at
any desired pressure, as may be found requisite. The additional back pressure
thereby thrown on the auxiliary engines is practically of no importance, as they
are generally non-expansive
By this device the feed water can be raised to a higher temperature than when
the overflow steam from the heater is connected directly to the condenser or hot
well
Any suitable form of relief valve may be used, but I prefer one capable of easy
adjustment.
A back pressure valve, not automatic in its action, or a regulated aperture, may
also be used to maintain the necessary pressure within the feed heater
My mvention is specially applicable to maine feed water heaters, but it may
also be applied on land.
Dated this 11th day of February 1899.

page_text: Improvements in Feed Water Heaters
I, The Honourable CHARLES ALGERNON PARSONS, of Heaton Works, Newcastle-
on-Tyne, in the County of Northumberland, 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:―
My invention relates to feed water heaters, heated by steam, which steam is
ultimately condensed by a surface or jet condenser. The invention is specially
applicable to feed water heaters used with marine engines where steam is supplied
to the feed water heater from the exhaust of the auxiliary engines. In feed
water heaters so connected the temperature of the steam 18 1apidly reduced
because of the reduction of steam pressure towards the pressure within the surface
condenser.
The object of my invention is to mamtam the pressure of the steam while it
is within the feed water heater, and thereby to heat the feed water to a higher
temperature than is otherwise possible.
My invention consists in interposing a sufficient resistance between the feed
water heater and the condenser. This I preferably effect by means of a loaded
valve. The loaded or relief valve allows steam to discharge to the condenser
whenever it attains the desired pressure This enables me to maintain a higher
pressure within the feed water heater than that of the condenser, and so permits
the feed water to be heated to a higher temperature.
Referring to the accompanying sheet of drawings, which illustrate one method
of carrying my invention into effect,
Figure 1 shows in elevation a general arrangement of feed water heater,
boilers and auxiliary engines, and
Fig. 2 is an enlarged elevation partly in section of the feed water heater show-
ing the reducing valve in place
Figure 3 is a section through line-y of the reducing valve in Figure 2.
In carrying my invention into effect according to one method as illustrated, I
pass exhaust steam by means of a pipe c from the auxiliary engines of a ship
to the feed water heater a and I fit a loaded or relief valve b on the overflow steam
pipe passing from the heater a to the ship's main condenser or hot well.
The feed pumps are shown at e They draw water from the hot well by the
pipe f and deliver it to the feed water heater a through the pipe g. The feed
water passes thence to the boiler by the pipes 2, 3, and and the usual check
valves.
The rehef or loaded valve b may be of any suitable type. As shown it consists
of a valve chest 7 with a valve and spindle m held to its seat by means of a
sping the pressure on which can be regulated by a screwed spindle o acting
through a screwed bridge piece 7. Provision may be made for locking the valve
in any given position as required.
By the use of this valve b the exhaust steam in the heater a can be maintained
at any desired pressure as may be found requisite. The additional back pressure
thereby thrown on the auxiliary engines is practically of no importance, as they
are generally non-expansive.
By this device the feed water can be raised to a higher temperature than when
the overflow steam from the heater is connected directly to the condenser or hot
well
Instead of the valve b, a back pressure valve, not automatic in its action, or a
regulated aperture, may be used to maintain the necessary pressure within the
feed heater,

page_text: My invention is specially applicable to marine feed water heaters, but it may
also be applied on land.
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
1. In feed water heating arrangements a valve or other device adapted to
produce a pressure greater than that of the condenser, substantially as and for
the purposes herein before described.
2. The improved arrangement of feed water heater comprising substantially
non-expansive engines delivering their exhaust into a feed water heater such as a
such exhaust passing to a condenser through a check or back pressure valve such
as & substantially as and for the purpose herein before described with reference to
the accompanying drawings.
Dated VILIS отц
GOT CLUES OUT
MARKS & CLERK,
18, Southampton Buildings, London, W.C.,
13, Temple Street, Birmingham, and 25, Cross Street, Manchester,
Agents.