IMPROVED APPARATUS FOR HEATING FEED WATER SUPPLIED TO BOILERS, AND ALSO FOR CONDENSING SURPLUS SORAM IN BOILERS " SP
Year: 1875

page_text: LETTERS PATENT to Samuel Johnson, of East India Road, in the
County of Middlesex, and William Allan, of Greenwich, in the
County of Kent, for the Invention of "IMPROVED APPARATUS FOR
HEATING FEED WATER SUPPLIED TO BOILERS, AND ALSO FOR CONDENSING
SURPLUS SORAM IN BOILERS "
PROVISIONAL SPECIFICATION left by the said Samuel Johnson and
William Allan at the Office of the Commissioners of Patents, with
their Petition, on the 18th January 1875.
We, SAMUEL JOHNSON, of East India Road, in the County of Middle-
sex, and WILLIAM ALLAN, of Greenwich, in the County of Kent,
do hereby declare the nature of the said Invention for "IMPROVED
APPARATUS FOR HEATING FEED WATER SUPPLIED TO BOILERS, AND ALSO FOR CON-
DENSING SURPLUS STEAM IN BOILERS," to be as follows:-

page_text: Secondly. To save the great quantity of steam which has now to be
blown into the air through waste steam pipes when steamers are entering
harbours, or at any time when boilers are obliged to be kept under steam
without the main engines being at work.
In carrying out the said objects we prefer to place in the boiler (close
to the top) a succession of pipes, by preference tinned both inside and
outside. These pipes will be placed lengthwise, hung in straps, which
will be bolted to the top of the boilers, then carried down the side to
connect to the cock or valve on the side of the boilers to regulate the
feed. When the donkey feed is not required this cock can be opened to
a pipe which will lead to the ship's side. This pipe will discharge out-
board. The cock placed on the side of the boilers cannot be shut off the
pumps, it being always open either to the boilers or to the outboard
discharge, as when shut off either one it opens to the other.
Self-acting valves will be fixed to prevent the water returning to the
pumps, a clack valve inside the boilers, or a self-acting conical valve
between the boiler and the cock before mentioned.
The donkey feed for the boilers will pass through the heater or
condenser, and can be turned on the boilers or on the outboard discharge
when steam is up and the ship not ready to leave. The engineer can
start the donkey engine to work, discharging outboard, and condense the
steam which otherwise would be blown away. The steam thus condensed
will fall back into the boilers.
When feed water is required the donkey will be stopped and the cock
turned on to the boilers; the donkey being again started on to the boilers,
the cold water taken from the sea will be heated by passing through the
heater or condenser and entering the boilers at the same temperature, as
the water already in them saves the internal parts from contraction.
The main feed will pass through a self-acting valve opening into the
heater or condenser on the top of the boilers. The donkey discharge will
also pass through a similar valve, so that the discharge from both pumps
will enter the heater or condenser at the top of the boilers.
When the main engines are being started the cock will be shut off,
the outboard discharge and the feed water will pass through the heater
or condenser into the boilers, thus keeping them at an uniform tempera-
ture all the time they are under steam.. :

page_text: In the case of ships having boilers as usually employed, they generally
leave port with boilers perfectly tight and remain so until the fires and
tubes get dirty, then follows a reduction of pressure and a consequent
lowering of the temperature of the feed water, causing a contraction of
the internal parts, the back ends of the tubes being first affected, when
they begin to leak.
When the engines are obliged to be stopped at sea for awhile the
donkey is started on the boilers to keep the water up in the glass: When
the engines are again started water is found to be running through the
ash-pit, the supplementary feed has to be put on, and the destruction of
the boilers follows. Our heater or condenser is to obviate all this. It
can be put into any boiler at comparatively little expense, as it causes
only a slight alteration of the pipes.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Samuel Johnson and William Allan in the Great
Seal Patent Office on the 17th July 1875.
TO ALL TO WHOM THESE PRESENTS SHALL COME, wc, SAMUEL
JOHNSON, of East India Road, in the County of Middlesex, and WILLIAM
ALLAN, of Greenwich, in the County of Kent, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Eighteenth day of January, in the
year of our Lord One thousand eight hundred and seventy-five, in the'
thirty-eighth year of Her reign, did, for Herself,. Her heirs and suc-*
cessors, give and grant unto us, the said Samuel Johnson and William
Allan, Her special licence that we, the said Samuel Johnson and William
Allan, our executors, administrators, and assigns, or such others as we, the'
said Samuel Johnson and William Allan, our executors, administrators,
and assigns, should at any time agree with and no others, from time
to time and at all times thercafter during the term therein expressed,
should and lawfully might make, use, exercise, and vend, within the
United Kingdom of Great Britain and Ireland, the Channel Islands,
and Isle of Man, an Invention for "IMPROVED APPARATUS FOR HEATING
FEED WATER SUPPLIED TO BOILERS, AND ALSO FOR CONDENSING SURPLUS STEAM IN
BOILERS," upon the condition (amongst others) that we, the said Samuel:

page_text: Johnson and William Allan, our executors or administrators, by an
instrument in writing under our, or their, or one of their hands and
seals, should particularly describe and ascertain the nature of the said
Invention, and in what manner the same was to be performed, and
cause the same to be filed in the Great Seal Patent Office within six
calendar months next and immediately after the date of the said Letters
Johnson and William Allan, our executors or administrators, by an
instrument in writing under our, or their, or one of their hands and
seals, should particularly describe and ascertain the nature of the said
Invention, and in what manner the same was to be performed, and
cause the same to be filed in the Great Seal Patent Office within six
calendar months next and immediately after the date of the said Letters
Patent.
NOW KNOW YE, that we, the said Samuel Johnson and William
Allan, do hereby declare the nature of our said Invention, and in what
manner the same is to be performed, to be particularly described and 1
ascertained in and by the following statement :—
The objects of the Invention are,—
Firstly. To save marine boilers from the destruction caused by
pumping cold water into them while under steam.
Secondly. To save the great quantity of steam which has now to be 1
blown into the air through waste steam pipes when steamers are entering
harbours, or at any time when boilers are obliged to be kept under
steam without the main engines being at work.
In carrying out the said objects we prefer to place in the boiler close
to the top a succession of pipes, by preference tinned both inside and 2
outside. These pipes to be placed lengthwise, hung in straps, bolted to
the top of the boilers, then carried down the side to connect the cock or
valve on the other side of the boiler to regulate the feed. When the
donkey feed is not required this cock can be opened to a pipe which will
lead to the ship's side, and such, pipe will discharge outboard. The 2
cock placed on the side of the boilers cannot be shut off the pumps, it
being always open either to the boilers or to the outboard discharge,
as when shut off either one it opens to the other.
Self-acting valves will be fixed to prevent the water returning to the •
pumps, namely, a clack valve inside the boilers or a self-acting conical 3
valve between the boiler and the cock before mentioned.
The donkey feed for the boilers will pass through the heater or
condenser, and can be turned on the boilers or on the outboard discharge
when steam is up and the ship not ready to leave. The engineer can
start the donkey engine to work, discharging outboard, and condense the 3

page_text: Fig. 2, half plan of one boiler and sectional plan of the other.
Fig. 3, transverse section of one boiler and front elevation of another
boiler.
Fig. 4, part clevation of outside side of a boiler.
Fig. 5, part elevation of inside side of a boiler.
In these Figures A represents the boilers; B is the series of pipes
hung in the straps b, said straps being bolted to the top of the boilers A;
C is the pipe from engine feed, and C', pipe from steam pump, said pipes
being connected to box D, and at the top of pipes inside the box D are
valves which prevent the water returning to the pump; C³ is a relief
valve on top of said box D, so that in case of any extra pressure of
water in the pipes B same will pass out thereby. The water is pumped
by pipes C and C', according to which feed is used through and into
box D, and thence by pipe C to the series of pipes B circulating through
same, by which action the water gets heated, and finally after circulating
all through the series of pipes B enters the cock E, and may by
regulation of the same be discharged outboard by pipe G, or by pipe F
be conveyed to the boiler to feed the same and be discharged therein.
The feed to the boiler is further regulated by conical valve fitted at H.
Fitted to pipe Care valves c, c, which, when the water is being fed
into the pipes B, allows the free access of the water to same, but when
pumps are stopped these valves c close and prevent the return of any of
the water, thereby retaining the heat in the boilers and avoiding the
box D getting heated, which would otherwise occur.
Having now particularly described and ascertained the nature of our
said Invention, and in what manner the same is to be performed or put
in practice, we hereby declare that we claim the said Invention of
"Improved Apparatus for Heating Feed Water supplied to Boilers, and
also for Condensing Surplus Steam in Boilers," substantially as herein.
before set forth and described and illustrated by the Drawings, wherein
the important and peculiar features are the combination of a series of
pipes substantially as described secured to the inside of boiler in com.
munication with the engine and donkey feeds, whereby the water in

page_text: circulating through the pipes is heated; also the arrangements for
feeding the boiler with the water so heated, or when found desirable
discharging same outboard. It being understood that we do not limit
or confine ourselves to the precise details herein-before described and
illustrated by the Drawings, as same be varied if special circum-
stances require same without departing substantially from the nature
and character of our.said Invention.
In witness whereof, we, the said Samuel Johnson and William
Allan, have hereunto set our hands and seals, this Sixteenth
day of July, in the year of our Lord One thousand eight
hundred and seventy-five
5
SAMUEL JOHNSON. (L.S.)
WM. ALLAN.
(L.S.) -
Witness,
T. MORGAN,
Secretary, Inventors' Patent Right Association, Limited,
Patentees' Agents,
21, Cockspur Street,
London, S.W.