Improvements in Combined Steam Boiler Feed-water Heater, Condenser, and Oil Separator.
Year: 1892

page_text: Date of Application, 28th June. '892-Accented. 30th July, 1892
Improvements in Combined Steam Boiler Feed-water Heater,
Condenser, and Oil Separator.
1, ELIHU NELSON, of 11 Wall Street, in the City, County, and State of
New York, United States of America. 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:-
The object of my invention is to do away with the waste which is now so common
in the use of engines in buildings where the steam is utilized for heating purposes.
for running the elevators, and so on. In operating such engines it is now customary
to let the drips from the engine, and the returns from the radiators pass off without
being utilized.
Moreover, the exhaust steam from the boiler-pump is usually
carried off to the open air, its heat being in this way allowed to go to waste.
I obviate the waste thus occasioned, by providing an apparatus wherein the heat
of the exhaust steam from the boiler-pump is utilised in raising the temperature of
the feed water; and I also make use of the heat of the engine drips and the
radiator returns for the same purpose.
Moreover, in buildings which are heated by the exhaust steam of the engine,
there is a considerable amount of oil passing through the radiators along with the
exhaust, and for this reason the returns from the radiators are ordinarily passed
into the sewer, the oil making them unfit for use in the boiler. In my apparatus
these returns are carried to the feed water heater, and the heat is transferred to the
feed water, as already indicated. But after it emerges from the heater. I pass it
into a separator, to separate the oil from the water, so that the latter can be passed
into the sewer, or wherever else desired. In doing this, I pass the heating water
in an opposite direction from that taken by the feed water, the result being that the
heating water, when it passes out into the sewer, or elsewhere, is comparatively
cool and in such condition that it will not give rise to the noxious vapours which
are the cause of much trouble when the sewers are traversed by water at a high
temperature. On the other hand, the arrangement described serves to carry the
feed water to the boiler, hot, inasmuch as this water meets the drips and radiator
returns after they have become somewhat cool, and taking up some of their heat
passes constantly along a course which is gradually hotter and hotter until it comes
to the point where the drips and returns enter the condenser. Beyond this point,
I arrange to have the feed water met by the exhaust steam from the boiler-pump,
which steam also travels in a direction opposite to that of the feed water, so that
the feed water passes into the boiler at a very high temperature.
Owing to the arrangement of the different parts, it is impossible that any water
should be carried to the boiler without being first heated by the exhaust steam
from the boiler-pump.
In a modified form of my invention, which is illustrated herewith, 1 join the
exhaust pipe from the boiler, as already indicated, to the section farthest removed
from that at which the feed water enters: But instead of connecting the exhaust
from the engine at the same point where the drips and returns enter, I make several
connections from the engine exhaust pipe to different sections, and I join the pipe
from the radiators and that carrying the engine drips to sections which are other
than those to which the engine exhaust pipe is joined. Moreover, the radiator
returns are not carried to the same section as the engine drips. In practice I
join the engine exhaust pipe to alternate sections at the same end of the apparatus ;
and I join the pipe carrying the radiator returns and that carrying the engine drips
to different intermediate sections. By this arrangement, I find it is impossible to

page_text: obtain a temperature several degrees higher than can be obtained with the other
form of apparatus.
In connection with the improvements above detailed, I have also made improve-
ments in the oil separator, by forming a trap for the water of condensation to pass
through before entering the separator proper; by providing a vent in the pipe
leading into the separator; and by arranging the outlet so that the water, in
passing off, will be several inches below the top of the separator.
In still another modification of my invention, I connect up with the different
sections of the feed water heater, or with groups of the said sections, the exhaust
pipe from the boiler-pump and a branch of the engine exhaust pipe, the connection
being such that the sections, or groups of sections, are in multiple are between the
said branch exhaust pipe and the main exhaust pipe from the engine. By this
arrangement, I bring it about that the steam which is used for heating the feed
water is applied to small portions thereof while the steam is at a great heat, and
that, in this way, the greatest efficiency is secured. Moreover, by passing the
steam, after utilization in the heater, out at the main exhaust pipe, I ensure a free
exit and guard against clogging and backing in the apparatus. As a matter of fact,
a vacuum is created in the main exhaust pipe, or rather in an intermediate pipe
connected thereto, which vacuum greatly facilitates the action.
In all the forms of my apparatus, the feed water heater, the condenser and the
oil separator, are intimately joined in a single device, each coöperating with the
others to produce an efficient apparatus.
I have illustrated my invention in the accompanying drawings, in which
Fig. is an elevation of one form of my apparatus, showing the connections to
the engine and the boiler-pump;
Fig. 2 is an elevation of another form of my apparatus ;
Fig. 3 is a detail view of the straps;
Fig. 4 is an elevation of a modification of my invention;
Fig. 5 is a detail view, partly sectional, showing a form of coupling which I use
with my heater, and which forms a part of my invention;
Fig. 6 illustrates still another form of coupling by a similar view; and
Fig. 7 shows a modified form of coupling.
In Figs. 1, 2, and 4, the oil separator is shown either wholly or partly in
section.
Referring to the drawings by letter, and particularly, now, to Fig. 1, I show a
series of sections-1, 2, 3, 4, 5, 6, 7, making up my condenser and feed water heater.
In Figs. 2 and 4, I show a longer series, extending from 1 to 9, inclusive, as will
appear by reference to the figures in question. Each section consists of two. pipes,
one within the other, the central pipe forming a chamber for the exhaust steam
from the boiler-pump, or for the engine drips and radiator returns, as the case may
bc.
The two pipes are connected together by tees, 13, which screw upon both pipes,
the latter being provided for this purpose with screws of similar pitch. Outside
the tees are placed lock-nuts, 14 and 15, the former of which screw up tight against
the ends of the tees, 13, and the latter of which are screwed against the ends of
ells, 16, which are screwed upon the ends of the inner pipes. The ells, 16, are
joined by vertical pipes, 17, and the tees, 13, by vertical pipes, 18, the said ells and
tees being joined in pairs from section to section, as will be readily understood.
It thus appears that each section forms a double chamber, one of which-the
central one is cylindrical in shape, and the other annular. Moreover, it is
apparent that the central chambers are connected continuously to form one passage
for the steam, and also that the annular chambers are similarly connected to form
a passage for the feed water. The feed water, being passed through annular
chambers, as described, will present a large amount of surface in proportion to its
volume, and, consequently, will take up heat with great comparative rapidity and
be heated to the proper degree so much the sooner. To facilitate this process, the
sizes of the pipes may be graduated in such a manner as to leave the feed water
very thin outside the inner pipe.

page_text: It will be observed that, beginning with section 3, the ends of the inner section
pipe are capped with tees instead of ells, and that these tees are provided with
plugs, 19. The object of this is to admit of cleaning the inner pipes, the plugs
being removable for this purpose. The reason why this construction begins with
section 3, is because it is at this section that the returns from the radiators enter,
carrying oil, which necessitates the cleansing process.
The connecting pipes, 17 and 18, for the inner and outer chambers, respectively,
are sufficient to brace succeeding sections at one end, but at the opposite end I
supply a separate brace, 20, as shown. To support the whole structure, I supply
legs, or standards, 21, 21, which are set in bases, 22, 22, at the bottom.
On the end of the inner pipe of the last section, I secure a tee, 23, and I couple
Near the
this with a pipe or ell, 24,,leading to the cap of my oil separator, 25.
bottom of the separator, a pipe, 26, leads off, which is joined by a tee with a vertical
pipe, 27, connected to the exit pipe, 28. A bye-pass, 29, leads from the tee, 23, to
a tee, 30, connected with the pipe 28. I may provide a vent pipe, 31, for the
pipe, 29, or I may dispense with the same.
At 45, 45, 45, 45, I show radiators, and at 32, 32, 32, 32, I show pipes for the
radiator returns. The engine drip pipe appears at 47, and it is joined to the main
drip pipe, 33; the pipe, 34, constituting the branch drip pipe, to which the radiator
returns are joined. The pipe, 33, is connected through a check valve, 35, and
suitable ells and tees, with the central pipe of section 3. This pipe also has an
extension, 36, leading through a valve, 37, to the exhaust pipe, 48, from the
engine, 44..
The boiler-pump is shown at 43, and from it proceed the pipes 38, which is
the inlet pipe for the feed water, and the pipe 39, which is the inlet for the
exhaust steam from the boiler-pump. The pipe, 40, is the pipe which leads to the
boiler.
Such being the construction and arrangement of the separate parts, I will now
describe the mode of operation of the apparatus taken as a whole. The valve, 37,
will, when the radiators are in use-that is, in the winter season-be either wholly
If it is not needful to
or partially closed, according to what is found necessary.
draw on the exhaust steam from the engine, this valve will be completely closed;
otherwise, it may be open completely or partially.
It will be understood that the engine drips pass into section 3 both summer and
winter; but the radiator returns only during the cold season, when the radiators
are in use.
In either case, heated water or condensed steam will pass into this section from
the pipe, 33, and will take a downward course toward the lowermost section.
Gradually becoming cool, it will, in the lower section, meet the feed water while
it is cold, and part with the greater portion of its remaining heat, thus passing into
the oil separator comparatively cool. On the other hand, the feed water will
gradually become more heated, and will consequently meet a portion of the heating
medium which is less cooled by condensation. In this way, both the feed water
and the heating medium act with highest possible degree of efficiency, the former
exerting its greatest possible condensing effect, and the latter its greatest possible
cating effect. When the feed water passes, in its upward course, beyond the
third section, it is met by the exhaust steam of the boiler-pump, and heated to a
still higher degree, so that it passes into the boiler at a very high temperature.
It is largely for this purpose (so that the feed water may be subjected to higher
and higher degrees of temperature) that I have caused the main drip pipe to be
connected at approximately the middle section, and have caused the currents for
heating and condensing to flow in opposite directions. But the arrangement also
serves the purpose of preventing the choking and back pressure on the boiler-
pump, which would take place if the pipes, 33 and 36, were led into the first
5 section.
Returning, now, to the water of condensation, which passes out from the lower
section into the separator, it will be seen that it passes through the same into the

page_text: pipe, 27, which is so arranged as to form a trap for the water in the separator.
If there are any vapors carried along with the water, they will go through the
bye-pass, 29, and out at the exit, 28, or at the vent pipe, 31. As has been stated
already, the waters of condensation themselves have become cooled sufficiently to
be passed out into the sewer, or elsewhere, without danger. The oil will be kept
at the top of the separator, and can be drawn off at intervals through the cock, 41.
But for the bye-pass, 29, the vapors might carry some of the oil through the water
to the exit; but this is now prevented.
All the sections of the feed water heater are of the same dimensions, but they
may be made long or short to suit the space which the heater is to occupy. If
the sections are made longer, a smaller number will be required to do the same work.
The object of the check valve, 35, is to keep the exhaust steam from backing
up into the main drip pipe and its branches.
In the tee which connects pipes 26 and 27, I place a plug, 42, which can be
removed for emptying the oil separator whenever it is desired.
Referring, now, to Figs. 2 and 3, one of the first modifications which presents
itself on inspecting the drawing, is the different means employed for bracing the
different sections and uniting them all into one apparatus. For this purpose 1
employ straps, 11, which are shaped with straight and curved portions in such a
manner as both to surround the other pipes of the different sections, and also
present coupling portions, through which bolts can be driven for uniting the whole
structure. provide a pair of such straps at each end of the sections. They
serve, not only as vertical supports, but also as 'braces against horizontal
displacement.
:
Another variation is that between the tee, 23, on the end of the inner pipe of
the lowermost section and the oil separator proper, I insert a series of pipes, 49, 49,
forming a trap. The latter I connect suitably with the top of my oil separator, 25,
introducing in the connecting pipe a vent, 50.
In this form of the apparatus, the radiator returns enter the inner pipe of section 6
and the engine drip pipe, 47, enters, the inner pipe of section 8 through a check
valve, 51. The radiator return pipe, 33, has, as before, a check valve, 35, and for
the same reason.
The engine, 44, has a main exhaust pipe, 48, from which I lead off a
branch exhaust pipe, 52. Above the branching point of the main exhaust
pipe, I place an adjustable pressure valve, 53, so that whatever steam is
necessary may be passed into the branch pipe, while the surplus may pass out
through the pressure valve. In the branch, 52, is a valve, 54, which may be used
to regulate the amount of steam which passes into the branch, or to cut it off
altogether. The branch pipe, 52, is itself branched at 55, 56, 57 and 58. The
inumber of these branches may be increased or diminished, according to
circumstances.'
Each branch enters through a valve, 59, the central pipe of one of the con-
denser sections. In the present instance the branch, 55, is connected with
section 3, the branch 56, with section 5, the branch 57 with section 7, and the
branch 58 with section 9. The distribution of the engine exhaust steam in the
different sections may be controlled by closing completely or partially one or more
of the valves 59, as may be found desirable.
In traversing its course from the boiler-pump through the various sections, the
feed water first encounters the steam which may have entered through the branch
pipe, 58, into the central pipe of section 9; next, it encounters the heat of the
engine drips coming into the central pipe of section S, by way of pipe 47; third,
of the steam which may have come in through pipe 57 into the central pipe of
section 7 fourth, of the radiator drips entering the central pipe of section 6 by
way of the pipe 33; fifth, of the steam which may have entered through pipe 56
into the central pipe of section 5; sixth, of the steam which may have entered
through pipe 55 into the central pipe of section 3; and, finally, of the exhaust
steam of the boiler-pump itself which passes through the pipe 39 and enters the

page_text: central pipe of section 1. Thus the feed water is acted upon successively by hea
proceeding from different sources, or entering the heater at different points, and i
is in this way raised to a very high degree of temperature. In other words, the feed
water is met at a large number of different parts in its course by fresh sources of
heat which have not been subjected to the cooling influence of the feed water
itself.
I find in practice that there is liable to be some disturbance of the surface of
the liquid in the oil separator, even when the bye-pass is present, and it is for this
reason that I have introduced the trap, 49. For the same reason, I have provided
the vent, 50, so that any vapors which may pass through the trap shall escape
before entering the oil separator.
In a branch, 60, from the main exit pipe, 38, I place a blow-off valve, 61, which
can be used whenever the occasion arises.
It will be observed that I unite the engine drip pipe, 47, with the drip pipe, 62,
coming from the boiler-pump. In each drip pipe, before they come to the point
of union, 1 place a check valve, 63, and a valve, 64. By means of the latter
valves, the drip pipes, or either of them, may be closed altogether, while the
valves, 63, serve to prevent the drips from opposing each other when the valves, 64,
are open.
We come, now, to Figs. 4, 5, 6 and 7. In Fig. 4, I show the exit pipe, 40, for
the water, connected with the outer pipe of section 1, and passing through a
purifier, 65, and out at a pipe, 66. The purifier is simply a vertical receiver
through which the heated feed water passes, and it is provided with a blow-off
pipe, 67, at the top, and with a vertical pipe, 88, at the bottom, through which
the sediment at the bottom of the purifier can be drawn off as often as may be
found necessary.
At 52,
The exhaust pipe from the boiler-pump leads, as before, to the inner pipe of
section 1, and carries the exhaust steam from the boiler-pump to the said inner
pipe, whence it passes through the inner pipes of sections 1, 2 and 3. Beyond the
last named section, it enters through a pipe, 68, a pipe, 69, which is joined through
a valve, 79, to the main exhaust pipe, 48, running from the engine, 44.
I show a branch exhaust pipe from the engine, and this branch pipe is itself
branched, so as to form multiple paths through the inner pipes of succeeding
sections, or groups of sections. In the present instance, I so arrange the branches
that the steam from the exhaust pipe, 52, passes off at various points through two
sections of the feed water heater, as shown. Referring to the drawing, (Fig. 4)
it will be seen that the branch most remote from the engine passes through
sections 2 and 3; the next branch passes through sections 4 and 5; the next
branch through sections 6 and 7; and the next brauch through sections 8 and 9.
All the branches referred to are joined to the pipe, 69, leading to the main
exhaust pipe, 48.
The automatic or adjustable pressure valve, 53, and the valve 54, serve the same
purpose as already indicated in connection with the description of Fig. 2. At 43,
is'shown a drip cock, the function of which need not be described. The valves, 59,
are also present, and serve the same purpose as before.
It is evident that there is a free passage of exhaust steam through different
sections of the apparatus, the hottest steam from the engine first coming in contact
with the feed water when it is coolest. However, there is practically little
difference in the temperature of the steam which acts upon the different sections,
as the amount of condensation which the steam undergoes in passing the entire
length of the pipe, 52, is inconsiderable. In section 1, which is the last section
through the feed water passes, it is met by the exhaust steam from the boiler-pump,
and receives there its final increase of temperature.
I have said that there is a free passage of the exhaust steam from the engine,
because it will be seen that the steam from the pipe, 68, passing through the upper
part of the pipe, 69, will tend to create a vacuum, and thereby increase the facility
with which the steam behind it traverses the said pipe; 69.

page_text: Aside from section 1 of my feed water heater, the sections are connected up in
multiple between the pipes, 52 and 69; or, practically, between the branch and the
main exhaust pipe from the engine. It is obvious that I may cause the pipe, 39, to
be joined to the inner pipe of the section here marked 2, without passing through
section at all. That is to say, section 1 may be dispensed with, if desired.
The means for coupling successive sections of my feed water heater also form a
part of the present invention. These means will best be understood by reference
to Figs. 5, 6 and 7. Referring to Fig. 5, it will be seen that the outer pipe of
section is joined to the outer pipe of section 2 by means of tees, 71 and 72,
screwed respectively to the outer ends of the said pipes and joined to each other by
a flanged joint. Connected with the tee, 72, where it surrounds the inner pipe of
section 2, I have a stuffing-box, 73, to prevent leakage. The inner pipes of the
section referred to are joined through the medium of a tee, 74, on the inner pipe of
section 2, and an ell, 75, bolted or secured by a flanged joint to the tee, 71.
My special attention has, however, been directed to the coupling which joins the
sections 2 and 3, and this, in Fig. 5, consists of three parts, 76, 77 and 78. The
parts 76 and 77 are counterparts, in the form of tees, having internal screw threads
for receiving both the outer and the inner pipes of their respective sections, and
flanges for coupling to their coöperating parts. They are secured together by
flanged joints, 79, and are similarly secured to the opposite ends of the goose-neck, 78.
The three parts, 76, 77 and 78, constitute, when joined together as described, an
end coupling for succeeding sections of my feed water heater.
In Fig. 6, I show a similar coupling, made up of only two parts, 80 and 81,
bolted together, as shown in the drawing.
In Fig. 7, a similar coupling is shown in a single casting, 82.
In all three of the forms of coupling illustrated, the part which corresponds to
the goose-neck, 78, in Fig. 5, is the part with which the inner pipe is connected:
and in all three forms, there is a passage, 83, for allowing the water to pass from
outer pipe to outer pipe of succeeding sections.
It will be observed that this kind of coupling is used at only one end of the
section, the coupling of the other end being sufficiently clear from the drawing,
taken in connection with the description which I have given of the parts 71, 72,
and 73.
I prefer the form of coupling shown in Fig. 7, but I do not wish to limit myself
to the use of that form alone.
The part 84, in Fig. 4, is a trap for letting off the waters of condensation.
It will be evident that the hereinbefore described details. and arrangements may
be modified without departing from my invention, and I therefore desire it to be
understood that I do not limit myself to them precisely as set forth.
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. A combined feed water heater and condenser, constructed arranged and
operated substantially as herein before described and as illustrated by Figure 1 of
the accompanying drawings..
2. A combined feed water heater, condenser, and oil separator, constructed
arranged and operated substantially as hereinbefore described and as illustrated by
Figure 1 of the accompanying drawings.
3. A combined feed water heater and condenser, constructed arranged and
operated substantially as herein before described and as illustrated by Figures 2
and 3 of the accompanying drawings.
4. A combined feed water heater, condenser, and oil separator, constructed
arranged and operated substantially as hereinbefore described and as illustrated by
Figures 2 and 3 of the accompanying drawings.
5. A combined feed water heater and condenser, constructed arranged and
operated substantially as herein before described and as illustrated by Figure 4 of
the accompanying drawings.

page_text: 6. A combined feed water heater. condenser, and purifier, constructed arranged
and operated substantially as hereinbefore described and as illustrated by Figure 4
of the accompanying drawings.
7. The combination with an engine, a boiler pump, and one or more radiators, of
a feed water heating apparatus consisting of a series of sections intermediate
between the said engine and the said boiler-pump and radiator or radiators, the
said hoiler-pump having its exhaust joined to the first section, and the said radiator
or radiators having its or their returns joined to an intermediate section of the said
heating apparatus, substantially as and for the purpose set forth.
8. The combination with an engine, a boiler-pump, and one or more radiators and
one or more engine drips, of a feed water heating apparatus, consisting of a series
of sections, intermediate between the said engine, the said radiator or radiators,
and the said engine drip or drips, the said boiler-pump having its exhaust joined to
the first section, and the said radiator or radiators and the said drip or drips having
their returns joined to an intermediate section of the said heating apparatus, and
the exhaust from the engine being also joined to an intermediate section, while the
inlet for the feed water is at the last section of the said heating apparatus, sub-
stantially as and for the purpose set forth.
9. The combination with an engine, a boiler-pump, and one or more radiators, of
a sectional feed water heating apparatus, the said boiler-pump having its exhaust
joined to the first section of the said heating apparatus, and the said radiator or
radiators having its or their returns joined to an intermediate section of the said
heating apparatus, and the inlet pipe for the feed water being joined to the last
section of the said heating apparatus, substantially as and for the purpose 'set'
forth.
10. The combination with an engine and with radiators, of an intermediate
sectional feed water heater, the inlet pipe for the feed water being joined to the last
section of the said heater, and the returns from the radiators being joined to an
antecedent section of the said heater, substantially as and for the purpose set
forth.
11. The combination with an engine, a boiler-pump, and radiators and engine
drips, of a sectional feed water heating apparatus, the first section thereof being
joined both to the drips and returns, and to the exhaust pipes from the engine, a
valve in the connecting pipe, and a check valve in the pipe joining the returns to
the intermediate section, the inlet pipe for the feed water being joined to the last
section of the said heating apparatus, substantially as and for the purpose set'
forth.
12. The combination with an engine and a boiler-pump, of an intermediate
sectional feed water heater, each section consisting of a double chambered pipe
forming an interior cylindrical and outer annular chamber, the first section of the'
said heater being joined through its inner pipe to the exhaust from the boiler-pump,
and the last section of the said heater being joined through its outer pipe to the
inlet pipe for the feed water, substantially as and for the purpose set forth.
13. In a feed water heater, consisting of a series of sections, the main drip
pipe, 33, in combination with the branches, 32, 32, 32, 32, and 34, the said main
drip being connected to one of the intermediate sections through a check valve, the
same intermediate section being joined to the exhaust pipe from the engine, sub-
stantially as and for the purpose set forth.
14. In a sectional feed water heater, the main drip pipe, 33, in combination with
the branch pipes, 32, 32, 32, 32 and 34, the said main drip pipe being connected to
one of the intermediate sections, in combination with a boiler-pump joined to the
first section, all the sections beyond the said intermediate section being provided
with removal plugs, substantially as and for the purpose set forth.
15. The combination with a feed water heater, of an oil separator, joined to the
outlet pipe for the waters of condensation and a bye-pass above the said separator,
to permit the escape of the vapors without passing through the water, substantially
as and for the purpose set forth.

page_text: 16. The combination with an oil separator joined to an outlet pipe, of a bye-
pass, substantially as and for the purpose set forth.
17. The combination with an oil separator joined to an outlet pipe, of a bye-
pass provided with a vent, substantially as set forth.
18. The combination with a feed water heater, and with the outlet pipe thereof,
of an oil separator joined to the said pipe, and a vertical pipe beyond the said oil
separator, forming a trap, substantially as and for the purpose set forth.
19. The combination with a feed water heater, and with the outlet pipe thereof,
of an oil separator joined to the said pipe, and a vertical pipe beyond the said oil
separator, forming a trap, and a bye-pass around both the oil separator and the
vertical pipe, substantially as and for the purpose set forth.
20. The combination with a feed water heater, and with the outlet pipe thereof,
of an oil separator joined to the said pipe, and a vertical pipe beyond the said oil
separator. forming a trap and a bye-pass around both the oil separator and the
vertical pipe, the said bye-pass being provided with a suitable vent, substantially
as and for the purpose set forth.
21. The combination with a feed water heater, and with the outlet pipe thereof,
of an oil separator joined to the said pipe, the said oil separator consisting of a
closed vessel which has an outlet near the bottom and a valve or cock near the top,
the said outlet leading into a tee provided with a plug, whereby the oil can be
drawn off through the cock, and the water through the opening made by removing
the plug, substantially as and for the purpose set forth.
22. The combination in a single apparatus, of a boiler pump, a feed water
heater, and an oil separator, substantially as and for the purpose set forth.
23. The combination with an engine and an oil separator, of an intermediate feed
water heater, the said oil separator being joined to the last section of the said feed
water heater, substantially as and for the purpose set forth.
24. The combination with an engine and a feed water heater, of a main exhaust
pipe for the said engine, a branch exhaust steam pipe connected with the said
main pipe, and also connected to the feed water heater, the said main exhaust
steam pipe containing a back pressure valve above or beyond the point of its
connection with the said branch pipe, substantially as and for the purpose set forth.
25. The combination with an engine and a feed water heater, of a main exhaust
steam pipe for the engine, and a branch exhaust steam pipe joined to the said main
pipe, and also to the said feed water heater, the said main exhaust steam pipe
containing a back pressure valve beyond the point of branching, and the said
branch exhaust steam pipe also containing a valve, substantially as and for the
purpose set forth.
26. The combination with an engine and a sectional feed water heater, of an
exhaust pipe from the engine connected to different sections of the said feed water
heater by separate connecting pipes, each connecting pipe containing a valve for
controlling the amount supplied to each section, substantially as and for the purpose
set forth.
27. The combination with an engine and a sectional feed water heater, of an
exhaust pipe from the engine joined to different sections of the said feed water
heater, substantially as and for the purpose set forth.
28. The combination with an engine, a boiler-pump, and an intermediate feed
water heater, of a drip pipe common to both the engine and the boiler-pump, the
said drip pipe being connected to the said feed water heater, substantially as and
for the purpose set forth.
29. The combination with an engine, a boiler-pump, and an intermediate sectional
feed water heater, of an exhaust pipe from the engine joined to different sections of
the said heater, and a common drip pipe from the boiler pump and the engine, the
said drip pipe entering the feed water heater at the end opposite to that at which
the exhaust from the engine communicates therewith, and at a section with which
the said exhaust from the engine does not directly communicate, substantially as
and for the purpose set forth.

page_text: 30. The combination with an engine, a boiler pump, and an intermediate feed
water heater, the said feed water heater communicating with the engine exhaust, of
a drip pipe common to the said engine and the said boiler pump, the said drip pipe
entering the said feed water heater through a check valve, substantially as and for
the purpose set forth.
31. The combination with an engine and one or more radiators, of an inter-
mediate feed water heater, through which the radiator returns pass, a steam
exhaust pipe from the engine communicating with the said feed water heater at one
end, and a pipe joining the said radiator or radiators to the said heater at the
opposite end, substantially as and for the purpose set forth.
32. The combination with an engine, and one or inore radiators, of an inter-
mediate feed water heater joined to the said radiator or radiators by means of a
pipe in which is a check valve, an exhaust pipe from the engine communicating
with several sections of the said heater, the communication from the steam exhaust
pipe being made at one end of the heater, and that from the radiator return pipe
being made at the other end of the heater, and at a section with which the steam
from the engine does not directly communicate, substantially as and for the purpose
set forth.
33. The combination with an engine and a boiler pump, of an intermediate
sectional feed water heater, and an exhaust steam pipe from the engine connected
to alternate sections of the said heater, substantially as and for the purpose set
forth.
34. The combination with an oil separator joined to an outlet pipe, of a bye-
pass, bridging both the oil separator and a trap, as 49, located near the separator,
substantially as and for the purpose set forth.
35. The combination with an oil separator joined to an outlet pipe, of a trap,
as 49, having a vent, as 50, the said trap being intermediate between the said
outlet pipe and the said oil separator, substantially as and for the purpose set
forth.
36. The combination with an oil separator joined to an outlet pipe, of a trap,
as 49, intermediate between the said outlet pipe and the said separator, a vent,
as 50, and a pipe, as 27, connected beyond the oil separator, the said pipe passing
to an exit, as 28, below the top of the oil separator, substantially as and for the
purpose set forth.
37. In a sectional feed water heater, a steam pipe, a pipe exhausting to the air,
and a series of sections connected up in multiple between the two pipes aforesaid,
substantially as and for the purpose set forth.
38. In a sectional feed water heater, an exhaust pipe from the engine, a second
pipe exhausting to the air, and a series of sections connected up in multiple between
the two pipes aforesaid, substantially as and for the purpose set forth.
39. In a sectional feed water heater, a main exhaust pipe from the engine
opening to the air, a branch exhaust pipe from the engine, and a series of sections
connected up in multiple between the two pipes aforesaid, substantially as and
for the purpose set forth.
40. In a sectional feed water heater, a steam pipe, a pipe exhausting to the air,
and a series of sections connected up in multiple between the two pipes aforesaid,
all in combination with a boiler-pump and an exhaust pipe therefrom, joined to
the last section or sections of the feed water heater, substantially as and for the
purpose set forth.
41. In a sectional feed water heater, an exhaust pipe from the engine, a second
pipe exhausting to the air, and a series of sections connected up in multiple between
the two pipes aforesaid, all in combination with a boiler-pump and an exhaust pipe
therefrom, joined to the last section or sections of the feed water heater, sub-
stantially as and for the purpose set forth.
42. In a sectional feed water heater, a main exhaust pipe from the engine
opening to the air, a branch exhaust pipe from the engine, and a series of sections
connected up in multiple between the two pipes aforesaid, all in combination with
B

page_text: a boiler-pump and an exhaust pipe therefrom, joined to the last section or sections
of the feed water heater, substantially as and for the purpose set forth.
43. In a sectional feed water heater, a main exhaust pipe from the engine
opening to the air, a branch.exhaust pipe from the engine, an adjustable valve in
the main exhaust pipe beyond the branching point, and a series of sections con-
nected up in multiple between the two pipes aforesaid, substantially as and for the
purpose set forth.
44. In a sectional feed water heater, a main exhaust pipe from the engine
opening to the air, a branch exhaust pipe from the engine, an adjustable valve in
the main exhaust pipe beyond the branching point, and a series of sections con-
nected up in multiple between the two pipes aforesaid, all in combination with a
boiler-pump and an exhaust pipe therefrom, joined to the last section or sections
of the feed, water heater, substantially as and for the purpose set forth.
45. In a sectional feed water heater, a series of sections, each consisting of a
pipe within a pipe, and a coupling for joining two successive sections, consisting of
a return bend having internal screw-threaded openings for receiving the ends of
the pipes, a goose-neck joining the ends of the interior pipes, and an internal
passage joining the ends of the outer pipes, substantially as and for the purpose sét
forth.
46. A pipe coupling having internal screw-threads for receiving pipes of
different diameter, and provided with flanges in planes at right angles to cach
other, substantially as and for the purpose set forth.
Datad his 27th day of Tun D 1905
WILLIAM E. HEYS,
Agent for the Applicant.