Year: 1886

page_text: Date of Application, 12th Nov., 1886.
Complete Left, 11th Aug., 1887
Complete Accepted, 16th Sept., 1887
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 which is in part of the kind
described in my Provisional Specification accompanying an Application for Letters
Patent, numbered 5305 of 1886, and has principally for its object to modify the
apparatus so that it may be placed at a low level relatively to the boiler or at whatever
level may be convenient in each case.
In carrying out my present Invention the feed water is led from the ordinary
pumps or other feeding apparatus into a vessel into which steam is admitted directly
from 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 perforated diaphragms so as to be
thoroughly intermingled with the steam. The heated water is transferred from the
heater to the boiler or to two or more boilers by an additional pump or set of pumps the
water being under the boiler pressure when entering the pump or pumps by which it
has therefore to be forced only to the extent of overcoming the column of water in the
boiler or boilers. The additional pump or pumps may be worked by a donkey engine
the supply of steam to which is controlled by a float in the feed heater. The float
may act directly on a valve arranged in the heater itself on a pipe for leading steam
from the heater to the donkey engine. Or the action of the additional pump or
pumps may be derived from that of the ordinary pump or pumps which force the
water into the heater, the plunger of the additional pump being attached to and
worked by a plunger acted on by the feed water on its way to the heater, and in such
a way that for every quantity of water forced into the heater a rather larger quantity
will be forced from the heater into the boiler. The water is led from the heater at a
point some distance above the bottom thereof, and a blow-off cock is fitted to the
bottom of the heater, as the heating of the water causes various impurities to be
deposited in the heater, which is an additional advantage of the apparatus the
impurities being thereby kept out of the boiler.
Dated this Eleventh day of November 1886.
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 which is in part of the kind
described in my patent specification, No. 5305 of 1886, and has for its object to
modify the apparatus so that it may be placed at a low level relatively to the boiler,
or at whatever level may be convenient in each case.
My improved apparatus is shown on three accompanying sheets of explanatory
drawings, figure 1, being an elevation of the feed heater and donkey pumps connected
with it, and figure, 2, a vertical section of the feed heater. Figures, 3, and 4,
are vertical sections showing a modification of some parts of the apparatus. In
these drawings the same reference numerals are used to mark the same or like parts
wherever they are repeated.
In carrying out iny Invention according to the modification corresponding to
figures, 1, and 2, the water is led from an ordinary pump, 5, (or other feeding
apparatus) by a pipe, 6, into a vessel, 7, into which steam is admitted directly from
the boiler by a pipe, 8, fitted with a stop valve. The water may be made to descend
through the heating vessel, 7, in the form of spray being introduced through a
perforated pipe, 9, fixed to the inlet, so as to become thoroughly intermingled with
the steam. The steam is introduced through another perforated pipe, 10, placed a
little below the water surface so as to blow in jets up through the water. The heated
water is transferred from the heater to the boiler or to two or more boilers by an
additional pump, 11, (or set of pumps) connected to the heater by a pipe, 12,
and to the boiler or boilers by a pipe, 13. The water is under the boiler pressure
when entering the pump, 11, by which it has therefore to be forced only to
the extent of overcoming the column of water between the surface level in the boiler
or boilers and that in the heater, 7. The additional pump or pumps, 11, may be
worked by a donkey engine the supply of steam to which is controlled by a float, 14,
in the heater, 7. The float, 14, may act directly on a valve arranged in the heater
itself on a pipe for leading steam from the heater to the donkey engine; it is, however,
shown as connected by a rod, 15, to a lever, 16, arranged so as on the float rising to
lift a valve, 17, admitting steam into a small cylinder, 18. This cylinder, 18, is
provided with a piston, 19, the rod, 20, of which passes out through a stuffing box and
acts on a weighted bellcrank lever, 21, connected by a rod, 22, to the steam supply
valve of the donkey engine. The piston, 19, acts also as an air escape valve, as when
it rises it uncovers a port leading into a pipe, 23, by which the air escapes from the
top of the heater, 7. This air pipe, 23, is led into the hot well so that any steam
passing with the air becomes condensed in the hot well and is not wasted.
The water is led from the heater, 7, through an outlet, 24, at a level some distance
above the bottom thereof, and a blow-off cock, 25, is fitted to the bottom of the heater,

page_text: as the heating of the water causes various impurities to be deposited in the heater,
which is an additional advantage of the apparatus, the impurities being thereby kept out
of the boiler. A thermometer, 26, is fitted in connection with the outlet water pipe, 12,
from the heater, 7; and a thermometer, 27, is also fitted in connection with the
pipe, 18, by which the water passes from the additional or second pump, 11, to the
boiler or boilers. The heater, 7, is also provided with a water level gauge, 28, and a
pressure gauge, 29. The outlet, 24, being near the water surface in the heater, 7, some
steam is by the suction of the second pump, 11, or, 30, drawn in along with the
water and insures the thorough heating of each successive portion of water passing to
the pump.
In the modification shown in figures, 3, and 4, the action of the additional or
second pump, 30, (corresponding to the pump, 11, of the first modification) by which
the water is pumped from the heater, 7, into the boiler, is derived from that of a
pump, 31, (corresponding to the pump, 5, of the first modification) by which
the water is pumped into the heater, 7. The plunger, 32, of the second pump, 30, is
acted on by the feed water on its way through the pipes, 33, and 6, to the heater, 7.
The first pump, 31, is fitted with a plunger, 34, working through a stuffing box and
having a longer stroke than what corresponds to the quantity of water forced into the
heater, 7, at each inward stroke. The inlet into the pump barrel, 31, is near the
middle instead of being at the end, and the plunger, 34, does not draw in water
(freely) until its inner end has passed the inlet. On the plunger, 34, completing its
outward stroke from the position in which it is shown in figure, 4, it draws in a
charge of water through the inlet, 35. On the return inward stroke of the plunger, 34,
water is forced through the pipe, 38, into the right-hand end of the second pump
barrel, 30, and acting on the plunger, 32, in that barrel makes it expel from the other
end of the barrel a charge of water into the pipe, 13, leading to the boiler. On the
plunger, 32, reaching the left-hand end of the barrel, it uncovers an outlet port, 36,
through which and the pipe, 6, the water still forced forward by the first pump
plunger, 34, passes on into the heater, 7. On the next outward stroke of the first
pump plunger, 34, it first makes the water draw back the second pump plunger, 32,
the water from the heater, 7, then entering the left-hand end of the barrel, through
the pipe, 12, and a foot valve, and then draws in a fresh supply of water through the
inlet, 35. It is a practical advantage of this arrangement that the first pump, 31,
may be at any distance from the heater, 7, whilst the second pump plunger, 32,
requires no separate mechanism to work it.
In the modification shown in figure, 3, the perforated water inlot pipe, 9, is shown
as placed below the surface of the water in the heater, an arrangement which in many
cases answers as well as the arrangement shown in figure, 2, and hereinbefore
described.
•
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-The improved combination of feed heating apparatus for steam boilers and
comprising a vessel into which the water is first pumped and into which steam is
admitted from the boilor, and a pump arranged to transfer the heated water into the
boiler substantially as and for the purposes hereinbefore described.
2-The transferring of the water from the heater to the boiler by pumping
apparatus worked by the water on its way to the heater and substantially such as is
hereinbefore described.
1
PA
1007
EDMUND HUNT,
Applicant's Agent.