IMPROVE- MENTS IN FEED WATER HEATERS
Year: 1875

page_text: LETTERS PATENT to Alexander Charles Baddeley Moffatt, of Halstead,
in the County of Essex, Engineer, for the Invention of "IMPROVE-
MENTS IN FEED WATER HEATERS."
Sealed the 5th May 1876, and dated the 4th December 1875.
PROVISIONAL SPECIFICATION left by the said Alexander Charles
Baddeley Moffatt at the Office of the Commissioners of Patents,
with his Petition, on the 4th December 1875.
I, ALEXANDER CHARLES BADDELEY MOFFATT, of Halstead, in the
County of Essex, Engineer, do hereby declare the nature of the said
Invention for "IMPROVEMENTS IN FEED WATER HEATERS," to be as
follows:-
Feed water heaters have heretofore been constructed in which the
exhaust steam from a steam engine is caused to pass through a series of
tubes enclosed in a casing in which the feed water is contained. Now
my Invention relates to the manner of constructing feed water heaters
of this class.

page_text: The body of the heater consists of a cast or wrought iron cylinder
with flanges at each end, and with two openings, one for the entry and
the other for the exit of the feed water. At each end of the cylinder &
chamber formed of cast iron is fixed; the chamber is provided with a
flange corresponding with that on the cylinder; and screw bolts are
employed to hold the flanges together. Each chamber is provided with
a passage, by which in the one case the steam enters, and by which in
the other case the steam, or so much of the steam as escapes con-
densation, leaves the apparatus. Holes are formed in the faces of the
chambers to receive the tubes, and the mouths of the holes are enlarged
to form a cavity to receive an india-rubber washer. The tubes have
flanges welded upon them near their ends, and the india-rubber washers
are placed on the ends of the tubes so as to rest against the flanges.
The parts are put together in the following manner:-The cylinder
and the bottom chamber are first bolted together, and the ends of the
tubes having the washers upon them are inserted into their places in
the face of this chamber. The tubes are properly spaced at the upper
end of the cylinder by a light tube plate, which is dropped into a cavity
prepared for it, and which has holes in it of such a size that the flanges
of the tubes can just pass through. The tubes being thus all held in
their places the other or upper chamber is put on, the end of each tube
entering its appropriate hole in the face. The bolts are then screwed up
so as to bring the flanges together, and at the same time to compress
the india-rubber washers against the flanges on the tubes.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Alexander Charles Baddeley Moffatt in the Great
Seal Patent Office on the 3rd June 1876.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, ALEXANDER
CHARLES BADDELEY MOFFATT, of Halstead, in the County of Essex,
Engineer, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Fourth day of December, in the
year of our Lord One thousand eight hundred and seventy-five, in
the thirty-ninth year of Her reign, did, for Herself, Her heirs and

page_text: successors, give and grant unto me, the said Alexander Charles Baddeley
Moffatt, Her special license that I, the said Alexander Charles Baddeley
Moffatt, my executors, administrators, and assigns, or such others as
I, the said Alexander Charles Baddeley Moffatt, my executors, ad-
ministrators, and assigns, should at any time agree with, and no
others, from time to time and at all times thereafter 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 "IMPROVE-
MENTS IN FEED WATER HEATERS," upon the condition (amongst others)
that I, the said Alexander Charles Baddeley Moffatt, my executors
or administrators, by an instrument in writing under my, 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 I, the said Alexander Charles Baddeley
Moffatt, do hereby declare the nature of the said Invention, and in
what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement thereof, that is to
say:
Feed water heaters have heretofore been constructed in which the
exhaust steam from a steam engine is caused to pass through a series of
tubes enclosed in a casing in which the feed water is contained. Now
my Invention relates to the manner of constructing feed water heaters
of this class.
The body of the heater consists of a cast or wrought-iron cylinder
with flanges at each end, and with two openings, one for the entry and
the other for the exit of the feed water. At each end of the cylinder
a chamber formed of cast iron is fixed; the chamber is provided with
a flange corresponding with that on the cylinder, and screw bolts
are employed to hold the flanges together.
Each chamber is provided
with a passage, by which in the one case the steam enters, and by
which in the other case the steam, or so much of the steam as escapes
condensation, leaves the apparatus. Holes are formed in the faces
of the chambers to receive the tubes, and the mouths of the holes are

page_text: enlarged to form a cavity to receive an india-rubber washer. The tubes
have flanges welded upon them near their ends, and the india-rubber
washers are placed on the ends of the tubes so as to rest against the
flanges.
The parts are put together in the following manner :-The cylinder
and the bottom chamber are first bolted together, and the ends of the
tubes having the washers upon them are inserted into their places in the
face of this chamber. The tubes are properly spaced at the upper end
of the cylinder by a light tube plate, which is dropped into a cavity
prepared for it, and which has holes in it of such a size that the flanges
of the tubes can just pass through. The tubes being thus all held in
their places the other or upper chamber is put on, the end of each tube
entering its appropriate hole in the face. The bolts are then screwed up
so as to bring the flanges together, and at the same time to compress the
india-rubber washers against the flanges on the tubes.
Figure 1 shows a vertical section, and Figure 2 a side vicw of a feed
water heater constructed as above described.
In these Figures A is the cylinder with flanges at each end. The
flange at its lower end is bolted to a flange upon the bottom chamber'
or base B, and to the flange at its upper end is bolted the upper
chamber or cover C. D is a steam inlet to the cover, and E a steam
outlet from the base B; from the base B is also an outlet F for water
condensed from the steam in its passage through the condenser; G is
an inlet for cold water at the lower end of the cylinder A, and H an
outlet for the heated water from the upper end of the cylinder; I, I, are
holes in the upper face of the base B to receive the lower ends of the
tubes K; the mouths of the holes are also enlarged, as above stated, to
receive india-rubber washers L. The bottom face of the cover has
similar holes formed in it to receive washers and the upper ends of the
tubes.
An under side view of the cover is shewn at Figure 3; full size views
of one of the india-rubber washers are shewn at Figures 4; and Figure 5
shews a longitudinal section of one of the tubes K with the washers
applied to its ends and resting in holes in the base and cover respectively.
Kare the flanges upon the tubes, which bear against the washers;
M is the light tube plate dropped into a cavity at the top of the
cylinder A, and which has holes formed in it large enough to allow the

page_text: flanges upon the tubes to pass through. N, N, are stays to support
the perforated faces of the base and cover; O is a shackle, by which the
cover may be raised and suspended whenever it is required to cleanse
the tubes.
By constructing feed water heaters in the manner above described it
will be seen that by the act of bolting down the cover all the steam-
tight joints are made simultaneously, and that by removing the cover
all the tubes are immediately released, whilst the light tube plate
serves to keep the tubes upright and in position when the cover is
taken off.
Having thus described the nature of my Invention and the manner of
performing the same, I would have it understood that I claim, the
construction of feed water heaters, substantially in the manner herein-
before described.
In witness whereof, I, the said Alexander Charles Baddeley Moffatt,
have hereunto set my hand and seal, this Thirty-first day of
May, in the year of our Lord One thousand eight hundred and
seventy-six.