Year: 1886

page_text: Date of Application, 16th Apr., 1886.
Complete Left, 14th Jan., 1887.
Complete Accepted, 15th Feb., 1887.
1, THOMAS GILMOUR, of Kilcattan Tile Works, in the County of Bute, North
Britain, Tile Manufacturer, do hereby declare the nature of this Invention to be as
follows, that is to say:-
My said Invention has for its object to prevent the straining and injuring of steam
boilers which is caused by the ordinary modes of introducing the feed water such feed
water being in a cold or comparatively cold condition and causing the temperature of
the water at the lower parts of the boiler to be cooler than and different from what it
is at the higher parts.
My Invention consists in heating the feed water in a simple manner on its entering
the boiler and so that when it mixes with the water in the boiler it will be of the same
temperature or nearly so. For this purpose I lead the feed water from the pumps or
other feeding apparatus into a vessel placed above the water level of the boiler, and I
admit steam from the boiler by a pipe or passage into the vessel so as to heat the feed
water before it passes down by a pipe or passage to mix with the water in the boiler.
The water may be made to enter the heating vessel in the form of spray and it may
descend through a series of horizontal diaphragms fitted with short tubes, the steam
being admitted to the lower part of the vessel and passing up through the diaphragms.
EDMUND HUNT,
Applicant's Agent.

page_text: COMPLETE SPECIFICATION.
Improvements in Feed Heating Apparatus for Steam Boilers.
I, THOMAS GILMOUR, of Kilcattan Tile Works, in the County of Bute, North
Britain, Tile Manufacturer, 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, that is to say:-
My said Invention has for its object to prevent the straining and injuring of steam
boilers which is caused by the ordinary modes of introducing the feed water, such
feed water being in a cold or comparatively cold condition, and causing the temperature
of the water at the lower parts of the boiler to be cooler than and different from what
it is at the higher parts.
My Invention consists in heating the feed water in a simple manner on its entering
the boiler, and so that when it mixes with the water in the boiler it will be of nearly
the same temperature. For this purpose I lead the feed water from the pumps or
other feeding apparatus into a vessel placed above the water level of the boiler, and I
admit steam from the boiler to the apparatus by one or more pipes or passages so as to
heat the feed water before it passes down by a pipe or passage to mix with the water
in the boiler.
And in order that my said Invention and the manner of performing the same may
be properly understood I hereunto append a sheet of explanatory drawings to be
hereinafter referred to and showing an example of my improved apparatus as applied
in connection with a marine steam boiler.
Figure, 1, on the accompanying sheet of drawings is a vertical section of the boiler
with my improved feed heating apparatus connected to it and shown partly in section.
Figure, 2, is an enlarged vertical section of the nozzle by which the water enters the
apparatus.
The feed heater is a vessel, 3, of a vertical cylindrical or other convenient form
placed a little higher than the water surface level of the steam boiler, 4, with which it
is connected. The vessel, 3, has connected to it a stop valve, 5, and pipe, 6, by which
the feed water is led to it from the feed pump or pumps, the inlet for the water being
at the top of the vessel and through an internal rose to subdivide, or, as I prefer,
through a nozzle, 7, of the kind shown enlarged in figure, 2. This nozzle, 7, is fitted
with an internal tubular valve piece, 8, the upper edge of which is made with a flange
to work in a cylindrical opening, 9, formed in the top of the nozzle body. The
pressure of the inflowing water raises the valve piece, 8, inore or less so that the water
passes down in an annular jet which draws the steam down into it through the valve
piece, 8, and thereby produces a rapid and effective intermixture of the steam and
water. The valve piece, 8, is prevented from rising too far by a ring bolted to the
top of the nozzle body, 7, and it may also be loaded by a weight or spring
if desired. From the nozzle, 7, the water descends from one to another of a
series of dishes, 10, in a manner to present a large surface to the action of the steam
which is admitted to the vessel, 3, through a pipe, 11, and stop valve, 12, and through

page_text: an internal pipe, 13, which is at a little distance below the surface level of the water
in the vessel, 3. The water passes from the vessel, 3, by a pipe, 14, connected at a
point a little higher than the steam inlet; but the vessel, 3, is extended some distance
lower in order that its lower part may serve to receive impurities which are deposited
from the water when it is heated, and a blow-off cock, 15, is provided for periodically
blowing out such impurities. A small cock, 16, is also provided for allowing of the
escape of air which separates from the water when being heated. A pressure
gauge, 17, is fitted to the top of the vessel, 3; and a thermometer, 18, is fitted to the
pipe, 14, to show the temperature, of the water as it leaves the vessel, 3, And if the
temperature is considered not as high as is desirable a little additional steam is injected
into the water on its way to the boiler, by means of a small branch pipe, 19, with a
stopcock, 20, and connected to an injector, 21, which is attached to the water pipe, 14.
From the injector, 21, the water passes on by a pipe, 22, and stop valve, 23, into the
boiler, inside of which it is delivered at one or more points near the bottom by means
of an internal pipe, 24.
Having now particularly described and ascertained the nature of my said Invention
and in what manner the same is to be performed, 1 declare that what I claim is :-
The combination of parts constituting my improved feed heating apparatus for
steam boilers and consisting essentially of a vessel placed above the surface level of
the water in the boiler, and fitted with connections arranged so that the feed water
on its way to the boiler is acted on in the vessel by steam admitted directly from the
boiler, substantially in the manner hereinbefore described.
EDMUND HUNT,
Applicant's Agent.