Improvements in Feed Water Heaters and Apparatus for like purposes."
Year: 1897

page_text: Date of Application, 9th Feb., 1897
Complete Specification Left, 8th Nov., 1897-Accepted, 1st Jan., 1898
PROVISIONAL SPECIFICATION.
Improvements in Feed Water Heaters and Apparatus for like
purposes."
I, JOHN EDWARD LEWIS OGDEN, of Penshurst, Vernon Road, Leytonstone, in the
County of Essex Engineer, do hereby declare the nature of this invention to be
as follows:-
This Invention relates to improvements in connection with heaters for feed
water and for like purposes, the objects being to construct an economical and
efficient apparatus which can be readily cleaned and examined, and which will
be free from complications such as may require skilled attention when in use.
In carrying my invention into effect when constructing a feed water heater in
one convenient manner I provide a circular chamber or casing within which I
mount a number of specially constructed tubes, and around these tubes I allow
steam to circulate for the purpose of giving the desired increase of temperature
to the feed water which I cause to pass through the tubes. At the upper end of
the chamber I mount tube plates or carriers arranged in such a manner that the
feed water enters between the tube plates from the feed pump or other supply,
and is drawn or flows out above the top tube plate and escapes from the upper
surface through an outlet branch which is then connected to an injector or other
feeding apparatus, pump or main for supplying the boiler in any ordinary well
known manner.
Above the water outlet end of nfy chamber I mount or place any ordinary
automatic or other air escape valve preferably of a floating balanced type for
permitting the liberated gases or air escaping from the heated water from the
tubes to be given free egress.
At the lower end of my tube chamber I arrange a steam trap or other device for draw-
ing the water from the interior of the chamber, the trap or valve being preferably
automatic in its action so that the condensed water may be kept at its proper
determined level in the bottom of the heater chamber. I may connect pipes from
the condensed steam outlet to lead the same back to the engine hotwell, feed tank
or reservoir when so desired. I supply live or exhaust steam to my central or
main heater case or chamber by means of a connection or connections of any
ordinary kind formed thereon. The chamber I may cover with nonconducting
material or I may form a steam or hot water jacket about it to economise the
heat within the vessel.
My improved tubes I form from any suitable metal with a diaphragm of
diaphragms running down the bore to within a short distance of the solid or closed
end of each tube; and I make an inlet or inlets into the tube near the top at a
position in the tube such that the water which flows between the tube plates may
flow down one portion of the tube and rise up upon the other side of the diaphragm
and be delivered out above the upper tube plate.
J

page_text: I attach my tubes to the tube plates in any ordinary manner by an expanding
tool or the like, and I make my diaphragm secure within the tube at its upper
open end by means of a semi-circular plug which I place. between one side of the
diaphragm plate and one portion of the inner circumference of the tube. This
plug I prefer to make with a slight taper upon it, and for convenience of with-
drawal I sometimes tap a hole in the outer face of the plug for a screwed pulling
rod or tool to be attached when it is desired to remove the plug and the diaphragm
for cleaning or other purposes..
...
I do not limit the application of my improved tube to any special form of casing
or chamber or to any particular shape of diaphragm or plug, but I modify the
same to suit the type of the heater and the distribution of the steam and water
connections and other fittings to suit any particular service or requirement for
which the heater is to be constructed.
Daved this oth, day or February 1897.
MARKS & CLERK
18, Southampton Buildings, London, W.C. and
13, Temple Street. Birmingham. Agents.
•
"Improvements in Feed Water Heaters and Apparatus for like
purposes."
I, JOHN EDWARD LEWIS OGDEN, of Penshurst, Vernon Road, Leytonstone, in the
County of Essex. Engineer, do hereby declare the nature of this invention and in
what manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement: -
.
This invention relates to improvements in connection with heaters for feed
water and for like purposes, the objects being to construct an economical and
efficient apparatus which can be readily cleaned and examined, and which will
be free from complications such as may require skilled attention when in use.
In the accompanying sheet of explanatory drawings,
Figures 1 and 2 are longitudinal section and plan respectively of the improved
tube and its fittings which I use in connection with my improved heater.
Figure 3 is a sectional elevation of one form of heater I construct, and
Figure 4 is a similar view of another method of construction I sometimes adopt.
Referrring to Figures 1 and 2, of the drawings as illustrating the construction
of the improved tube used; the tube A is formed of any suitable metal, and has
a central diaphragm B running down the bore to within a short distance of the
solid or closed end, and. this end is preferably closed with a screwed block such
as C. The upper end of the tube is expanded into the tube plates D, and E,
hereinafter to be described, and at one side of the tube A, between these two tube
plates a gap opening F, is formed. The tube is attached to the tube plates in
any ordinary manner by an expanding tool or the like and the diaphragm is made
secure within the tube at its upper end by means of a semi-circular plug or
wedge Q, driven in between one side of the diaphragm plate B, and the opposing
portion of the tube A. This plug Q is preferably constructed with a slight taper
upon it, and for the convenience of withdrawal a hole Q₁ may be drilled and tapped
in the plug so that a screwed pulling rod or tool may be coupled to it when it is
desired to remove the plug and the diaphragm for cleaning or other purposes.
In carrying my invention into effect as illustrated in Figure 3, a circular
chamber or casing G is provided, having placed within its upper end on suitable

page_text: necks, flanges or shoulders K, a double chamber tube plate H, I, and this double
chambered tube plate is held into position against the shoulders K by an external
cover J, which also forms a separate chamber when in situ. Tubes A, A, A, are
previously fixed to the tube plates D, E, in the manner hereinbefore described.
and these tubes are so arranged in number and position that one half of them are
fixed into the chamber I while the other half are fixed to the chamber H. A
water inlet port L' leads into the chamber I, while the exit port M leads out of
the chamber H. A passage N¹ on the casing G is connected by piping to ai
suitable steam supply, while a passage 01 at the bottom of the casing G is con-
nected by a pipe to a steam trap or similar device.
The operation of the feed water heater constructed in the manner described is
as follows, The water to be heated enters between the tube plates at the pipe L'
and passes into the chamber I, it then passes through the openings F in the sides
of the tubes A down one side of their diaphragms and up the other side into the
chamber J; and from there the water now passes down one side of the diaphragms
in the second sets of tubes, and up the other side out of the openings F into the
chamber H, and from there to the boiler injector or pump. The live steam
passing into the chamber or casing G comes in direct contact with the outer
surfaces of the tubes A and as the casing G is connected to a steam trap the
amount of steam used will be in direct proportion to the amount of heat absorbed
through these tubes, as additional live steam is only admitted at the same rate as
the condensation taking place in the casing.
The modified form of feed water heater illustrated on Figure 4 is constructed"
as follows, A single casting is provided with the double tube plates D and E and
the single chamber P, while the inlet L' and the outlet M are also formed
integrally with this casting; the whole is placed in the chamber or casing G and
held in position there by a cover J¹ also forming a chamber for the upper ends of
the tube A, A, A,. A similar live steam inlet N¹ and condensation outlet O¹ are
provided to that hereinbefore described. The operation of this feed water heater
is similar to that illustrated at Figure 3 but the water to be heated in this instance
passes down one side of all the tubes A and up the other side into the chamber J
the water at once passing from there to the source of boiler supply. In this
modification similar letters denote similar parts with reference to the modifications
already described.
On the water outlet end leading to the boiler or hot well an ordinary automatic
or other escape valve preferably of a floating balance type may be placed, so that
the liberated gases escaping from the heated water may be given free egress.
The outside of the casing or chamber G may be jacketed with steam or hot water
or may be lagged in any suitable manner with non-conducting composition.
I do not limit the application of my improved tube to any special form of
casing or chamber or to any particular shape of diaphragm or plug, but I modify
the same to suit the type of the heater and the distribution of the steam and
water connections and other fittings to suit any particular service or requirement
for which the heater is to be constructed.
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 heaters and apparatus for like purposes the provision of a
tube or series of tubes having the inner surface of the tube divided by a longi-
tudinal removable diaphragm into two separate channels in which the feed water
circulates, while the outer surface is in contact with steam, for securing rapid and
economical heating of the water.
2, The construction and arrangement for use in feed water heaters and
apparatus for like purposes, of a tube substantially as and for the purposes herein-
before described and illustrated in Figures 1 and 2 of the accompanying drawings.
3.In feed water heaters the construction and arrangement of a double tube

page_text: plate having a series of tubes fitted with removable plugs and diaphragms for
producing a change of flow of the water currents substantially as and for the
purposes hereinbefore described and as illustrated in the accompanying drawings.
4. Improvements in feed water heaters substantially as and for the purposes
herein before described and as illustrated in Figures 3 and 4 of the accompanying
drawings.
Dated this 8th. day of November 1897.
MARKS & CLERK
18, Southampton Buildings, London, W.C. and
13, Temple Street. Birmingham. Agents.