Improvements in Feed-water Heaters and Purifiers.
Year: 1887

page_text: Improvements in Feed-water Heaters and Purifiers.
I, THOMAS SEALE, of No. 510, Geary Street, in the City and County of San
Francisco, and State of California, United States of America, Gentleman, do hereby
declare the nature of this invention to be as follows:-
My invention relates to improvements in feed-water heating devices or apparatus of
that class or order which are adapted for insertion in the steam generating space of a
steam boiler from the outside for the purpose of utilizing the heat therein to raise
the temperature of the water before it is introduced into the boiler.
The improvements included in and constituting my said invention consist of a
heating and precipitating chamber having a circuitous water space and passage the
walls whereof receive direct contact with the steam or water in process of conversion
and surrounding the chamber on the outside the said chamber at one end setting
through the boiler shell and having connection to that end of a feed or supply pipe
from the feed pump of the boiler and at the opposite end of the circuitous way or
passage having feeding-in apertures into the boiler space.
To enable the apparatus to operate as a precipitating and purifying apparatus as
well as a heater, the circuitous way or passage is provided with a blowing off outlet
at that end which sets through the boiler, or that end which is farthest from the
feeding in apertures substantially after the manner of producing such kind of devices
with feed water inlet and a blow off outlet at the end outside the boiler, a device or
apparatus having these general features of construction, application and operation
upon which my present invention is an improvement is described in the specification
of Letters Patent dated 30th August 1884 Number 11,802.
The object of my present improvements is to secure a more rapid and effective
character of heating surfaces and more complete and rapid action of the boiler pressure
through the heating ways or passage in blowing out the extracted and precipitated
matter. The manner in which I proceed to secure said objects and to produce, apply
and operate my improved device or apparatus in accordance with my said invention
is explained and pointed out in the following description.
Two tubes or cylinders of comparatively small diameter are set closely together

page_text: side by side and an elbow or bent coupling connects the two tubes at their adjacent
ends. These parts thus joined produce a circuitous way or passage or one returning
upon itself. The free end of one of the said tubes is sealed by a cap and at or near
this end are located the feeding in apertures which are produced by drilling a number
of holes through the shell of the tube at that point.
These apertures are outlets for the water into the boiler space and also steam inlets
to bring the boiler pressure into the chamber for blowing off. The opposito end of
the chamber which is the corresponding end of the other tube is set into or secured
in a suitably tight manner to a head having a flange to fix it in position against the
boiler shell on the outside and directly over the opening in the boiler shell.
From this head the chamber passing through the shell extends into the boiler and
to this part the feed water supply pipe is connected and the blow off pipe is secured,
the space within the head which is common to the chamber and to these pipes having
apertures to receive the ends of the water supply and blow off pipes the same being
fixed by threaded joints.
The said pipes are provided with the necessary cocks and check valves to control
the feed water and to operate the blow off at suitable intervals of time during the
operation of the apparatus, but the same are used in all devices of the kind at the
present time, and do not require special description or illustration in connection with
my improvements.
Suitable support is given to the chamber at the inner end when found necessary,
by attaching a brace or hanger from some fixed point above, the opposite end being
supported at the head or part of the boiler where it enters.
According to a modification of my invention the circuitous way or passage of the
chamber is produced by setting a length of tube of smaller diameter within a larger
and longer tube and carrying one end of the smaller tube to one side and out through
the side of the larger tube near that end to which the feed water and blow off pipes
are connected, and in such manner that such projecting end of the small tube shall
open into the boiler space.
This construction brings the boiler pressure and travel of the steam through the
entire length of the circuitous way or passage in the operation of blowing off, and
effects a rapid as well as a thorough cleansing of the whole passage but only a portion
of the way or passage has its walls in direct contact with the surrounding body of
steam in which it is set in the boiler space although that portion of the passage which
has its walls enclosed by the walls of the larger space or passage surrounding it is
still open to the steam space, because its open end is carried to the outside of the
larger tube as before described and at that end the way or passage is open to the heat
of the surrounding boiler space.
The device being placed in a boiler and connected in suitable manner with a feed
pump the operation is as follows:-The feed water is let in by opening the feed cock
and as the activity of the heating surfaces of the chamber is greatly increased by
virtue of my improved construction the feed may be as rapid as circumstances
require, and under conditions of suitable length and diameter of the passages it may
be carried on continuously as for instance in locomotive boilers or where constant
feed for considerable time is called for.
At more or less frequent intervals, as the character or condition of the water being
used may require, the passage is cleansed by opening the blow off pipe to the atmo-
sphere, at which time the steam entering the chamber at one end passes through its
entire length to the blow off outlet, thereby effectually and rapidly removing
sediment and precipitated matter collecting in the chamber.
Dated this 10th 1
C
1008
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C.,
Agents for the Applicant.

page_text: Improvements in Feed-water Heaters and Puriflers.
I THOMAS SEALE of No. 510 Geary Street, in the City and County of Sanfrancisco
State of California United States of America, Gentleman 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 improvements in feed water heating devices or apparatus
of that class or order which are adapted for insertion in the steam generating space
of a steam boiler from the outside for the purpose of utilizing the heat therein to
raise the temperature of the water before it is introduced into the boiler.
The improvements included in and constituting my said invention consist of a
heating and precipitating chamber having a circuitous water space and passage the
walls whereof receive direct contact with the steam or water in process of conversion
surrounding the chamber on the outside. Said chamber at one end setting through
the boiler shell and having connection to that end of a feed or supply pipe from the
feed pump of the boiler, and at the opposite end of the circuitous way or passage
having feeding-in apertures into the boiler space. To operate as a precipitating and
purifying apparatus as well as a heater the circuitous way or passage is provided with
a blowing off outlet at that end which sets through the boiler, or that end which is
farthest from the feeding in apertures substantially after the manner of producing
such kind of devices with feed water inlet and a blow off outlet at the end outside
the boiler.
A device or apparatus having these general features of construction, application
and operation upon which my present invention is an improvements is embraced in
the British Letters Patent No. 11802 dated 30th August 1884.
The object of my present improvements is to secure a more rapid and effective
character of heating surfaces and more complete and rapid action of the boiler pressure
through the heating ways or passage in blowing out the extracted and precipitated
matter.
The manner in which I proceed to secure said objects and to produce, apply and
operate my improved device or apparatus in accordance with my said invention is
explained and pointed out in the following description, the accompanying drawing
being referred to by figures and letters.
In the said drawing:
Figure 1 is a side view of my improved apparatus in position within a boiler, the
parts being shown generally in longitudinal section and the connections outside the
boiler being broken
away.
Figure 2 is a cross section taken at the line x, x, figure 1.
Figure 3 shows the head or that end of the device which is located outside the
boiler, the part being in section.

page_text: Figure 4 represents a modification of the construction shown in the aforesaid
figures, and
Figure 4ª a cross section taken at the line x, x, figure 4.
A. A are two tubes or cylinders of comparatively small diameter set closely
together side by side and B, is an elbow or bent coupling connecting the two tubes at
their adjacent ends.
These parts thus joined produce a circuitous way or passage a, a* or one returning
upon itself.
'
The free end of the tube A* is sealed by a cap d and at or near this end is located
the feeding in apertures, c, c, which are produced by drilling a number of holes
through the shell of the tube at that point.
These apertures are outlets for the water into the boiler space and also steam inlets
to bring the boiler pressure into the chamber for blowing off.
The opposite end of the chamber which is the corresponding end of the other tube A
is set into or secured in a suitably tight manner to a head E that has a flange to fix
it in position against the boiler shell (x fig. 1) on the outside and directly over the
opening in the boiler shell.
From this part E the chamber passing through the shell extends into the boiler and
to this part the feed water supply pipe F, is connected and the blow off pipe G is
secured, the space within the head which is common to the chamber and to these
pipes having apertures f, g, to take the onds of the pipes F and G, the same being
fixed in them by a threaded joint.
The pipes F and G are provided with the necessary cocks and check-valves to
control the feed water and to operate the blow off at suitable intervals of time during
the operation of the apparatus-but the same are used in all devices of the kind at the
present time, and do not require special description or illustration in connection with
my improvements.
Suitable support is given to the chamber at the inner end when found necessary by
attaching a brace or hanger h from some fixed point above the opposite end being
supported at the head or part of the boiler where it enters.
In the modification of my device which is shown in figure 4 of the drawing the
circuitous way or passage of the chamber is produced by setting a length of tube A*,
of smaller diameter within a larger and longer tube A and carrying one end of the
smaller tube to one side and out through the side of the larger tube near that end to
which the feed water and blow off pipes are connected, and in such manner that such
projecting end of the small tube shall open into the boiler space.
This construction brings the boiler pressure and travel of the steam through the
entire length of the circuitous way or passage in the operation of blowing off and
effects a rapid as well as a thorough cleansing of the whole passage-but it will be
noticed that only a portion of the way or passage has its walls in direct contact with
the surrounding body of steam in which it is set in the boiler space although that
portion of the passage which has its walls enclosed by the walls of the larger space
or passage surrounding it is still open to the steam space because its open end is
carried to the outside of the larger tube as before described and at that end the way
or passage is open to the heat of the surrounding boiler space.
The device being placed in a boiler and connected in suitable manner with off feed
pump the operation is as follows.-The feed water is let in by opening the feed cock,
and as the activity of the heating surfaces of the chamber is greatly increased by
virtue of my improved construction the feed may be as rapid as circumstances require
and under conditions of suitable length and diameter of the passages it may be
carried on continuously as for instance in locomotive boilers or where constant feed
for considerable time is called for. At more or less frequent intervals as the character
or condition of the water being used may require the passage is cleansed by opening
the blow off pipe to the atmosphere, at which time the steam entering the chamber at
one end passes through its entire length to the blow off outlet thereby effectually and
rapidly removing sediment and precipitated matter collecting in the chamber.

page_text: Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is
1. A feed water heating attachment to steam boilers having the heating chamber
composed of the communicating spaces, a, a*, forming a continuous way or passage,
with feeding in apertures, c, c, at one end inside the boiler and a feed-water inlet and
an outlet for blowing off outside the boiler at the opposite end constructed for
operation as set forth."
2. In a feed water heating and purifying attachment for steam boilers a heating
and precipitating chamber composed of the parallel ways or passages a a* having
their walls or heating surfaces exposed to direct contact of the surrounding steam in
the boiler space, in combination with the head E having feed water and blow off pipes
connected to it, and the apertures c, c, at the opposite end of the chamber, substan-
tially as described.
3. In combination with a steam-boiler the feed water heating and purifying chamber
having a continuous water way or passage, a a*, the walls or heating surfaces whereof
are presented to the surrounding body of steam or water in process of conversion
into steam and furnished with feeding-in apertures, c, c at or near one end inside the
boiler, and connected at the opposite end to a feed water supply and a blow off pipe
outside the boiler as hereinbefore described for operation as set forth.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C.,
Agents for the Applicant.