Year: 1887

page_text: Date of Application, 17th Aug., 1887
Complete Left, 14th May, 1888
Complete Accepted, 15th June, 1888
I, 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 relates to feed heating apparatus for steam boilers and has for
its object to further simplify and improve apparatus of the kind described in my
Patent Specification No. 14643 of 1886 and mainly to dispense with a large separate
heating vessel into which the feed water is forced by a first pump or set of pumps
and in which it intermingles with steam from the boiler before being transferred by
a second pump or set of pumps to the boiler or boilers.
In carrying out my present Invention the feed water is led from an ordinary
primary pump or pumps or other feeding apparatus directly to a second pump or
set of pumps which latter transfer the feed water to the boiler or boilers. The
second pump or set of pumps is made to work either at a greater speed than the first
pump or pumps or is made of larger capacity so as to cause a reduction of the
pressure on the feed water in the passage between the first and second pumps. Into
this passage which is made of sufficient size steam from the boiler is admitted through
a check valve close to the first pump or pumps and being drawn along the passage
thoroughly intermingles with the feed water which is then transferred to the boiler
by the second pump or pumps. The steam may be led to the passage directly from
the boiler or after it has acted in the donkey engine or engines driving the pumps
or in other engines or in distilling apparatus for obtaining fresh water.
Instead of the second pump or set of pumps drawing water and forcing it forward
to the boiler or boilers it may be arranged to draw steam directly or indirectly from
the boiler and force it into the pipe conveying the feed water to the boiler or boilers.
The second pump or pumps may be combined with the first pump or pumps in one
machine.
Dated thin Sixtoonth dose of Anonat 1887
EDMUND HUNT,
Applicant's Agent:

page_text: 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 relates to feed heating apparatus for steam boilers and has for
its object to further simplify and improve apparatus of the kind described in my
Patent Specification No. 14643 of 1886; and mainly to dispense with a large separate
heating vessel into which the feed water is forced by a first pump or set of pumps
and in it intermingles with steam from the boiler before being transferred by a second
pump or set of pumps to the boiler or boilers.
In carrying out my prosent Invention I employ apparatus of a kind of which three
modifications are shown on an accompanying sheet of explanatory drawings, figure, 1,
being a vertical section of one modification; figure, 2, a vertical section of a second
modification, and figure, 3, a partly sectioned elevation of a third.
In these drawings the two feed pumps or sets of feed pumps are not shown but
only the apparatus through which the feed water passes from one to the other.
The feed water is led from an ordinary primary pump or set of pumps through a
pipe, A, fitted with a check valve, B, into a vessel, C, which is of comparatively small
size being a mere enlargement of the passage, and from which it proceeds through
a pipe, D, to a second pump or set of pumps. The second pump or set of pumps is
made to work either at a greater speed than the first pump or set of pumps, or is
made of larger capacity so as to cause a reduction of the pressure on the feed water in
the passage between the first and second pumps. Into this enlarged passage or
vessel, C, steam from the boiler is admitted through a pipe, E, provided with a check
valve, F, so as to enter amongst the feed water between the inlet, A, and outlet, D;
and the steam thus admitted intermingles with and heats the feed water which is then
transferred to the boiler by the second pump or pumps. Between the second pump
or set of pumps and the boiler I prefer to introduce a valve loaded. by means of a
spring or weight, for the purpose of somewhat increasing the pressure under which
the water is pumped so that it may be more highly heated on entering the boiler.
The vessel, C, extends below the inlet, A, to form space for the deposit of sediment
from the water and a blow-off cock, G, is fitted to the bottom for periodically
removing sediment. The vessel, C, is also extended upwards above the outlet, 1), for
the collection of air which may separate from the water; and a valve, H, is provided
at the top for letting-off accumulated air, a glass gauge, J, being provided for showing
the level of the water. A pressure gauge, K, is also connected to the top of the
vessel; and a thermometer, L, is provided for showing the temperature of the water
on leaving the vessel, this thermometer being fitted in a small vessel connected by
a tap, M, to the outlet pipe, D, to which there is also connected a safety valve, N.

page_text: In the modification shown in figure, 2, the apparatus for carrying out my Invention
is reduced to its simplest form. A tubular connecting piece, P, is provided with
two inlets, one, A, for the feed water from the primary pump or sets of pumps and the
other, E, for the steam; whilst the passages from these inlets, A, E, unite in a passage
having a single outlet, D, leading to the second pump or set of pumps.
In the modification shown in figure, 3, inlet pipes, A, E, (provided with check
valves) are connected to a box, C, having an outlet, D, leading to the second pump
or pumps, the steam pipe, E, being made with a nozzle projecting into the box and
directed towards the outlet, D.
In any of the modifications the steam may be led into the passage, P, or vessel, C,
between the first and second pumps, directly from the boiler or after it has acted in
the donkey engine or engines driving the pumps, or in other engines or in distilling
apparatus for obtaining fresh water.
Instead of the second pump or set of pumps drawing water and forcing it forward
to the boiler or boilers, it may be arranged to draw steam directly or indirectly from
the boiler and force it into the pipe conveying the feed water from the primary pump
or set of pumps to the boiler or boilers. The second pump or pumps may be combined
with the first pump or pumps in one machine.
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 heating apparatus for steam boilers causing steam supplied directly or
indirectly from a boiler or boilers to mix with the feed water in a passage through
which the feed water passes on its way from a primary pump or set of pumps to a
secondary pump or set of pumps substantially as hereinbefore described.
2-Heating feed water by pumping steam into it in a passage through which it
passes from a primary pump or set of pumps to the boiler or boilers substantially as
hereinbefore described.
m
_ 1000
EDMUND HUNT,
Applicant's Agent.