Improvements in Combined Boiler Circulators and Feed Heaters.
Year: 1895

page_text: PROVISIONAL SPECIFICATION.
Improvements in Combined Boiler Circulators and Feed Heaters.
THEOPHILUS STANLEY MOSSMAN 18 Ewart Road Seaforth Liverpool do
hereby declare the nature of this invention to be as follows:-
A brass casting comprised of two vertical columns, connected by a passage
forming a segment of a circle, the vertical columns are fitted internally with four
valves and injector-two of which are attached to one spindle, which shut off and
admit of feed water and boiler water alternately, and two of which are a combined
injector and valves, by which means, wheu fitted to any ordinary check valve,
from the donkey
will circulate from the under-mentioned places-with steam
boiler, when raising steam on main boilers or with its own steam when under banked
fires, or with the feed water from pumps, when the engines are in motion. It is
easily fitted to any marine boiler, will keep up a continual circulation of water,
raise the feed to a high temperature, by being amalgamated with boiler water from
lower parts of boiler before again entering, thus keeping the boiler at a uniform
temperature, destroying the possibility of leakage by unequal expansion and
adding a considerable age to the life of the boiler, also a decided saving of fuel.
10th of March 1895
Improvements in Combined Boiler Circulators and Feed Heaters.
I, THEOPHILUS STANLEY MOSSMAN, formerly of 18, Ewart Road, Seaforth,
but now of 3, Claremont Road, Seaforth, Liverpool, Engineer, do hereby
declare the nature of the said invention and in what manner the same is to be
performed to be particularly described and ascertained in and by the following
statement:-
This invention relates to improved means for feeding and circulating the water
of boilers or steam generators, and consists of an apparatus which may be used
either as a boiler circulator or as a combined boiler circulator and feed heater.
A combined boiler circulator and feed heater according to this invention consists
of a chest or casing with inlets for boiler water and feed water, and a steam jet
injector combined with an outlet for such water or mingled waters leading to an
ordinary check valve and thence to the boiler. Suitable valves are provided in the
chest on the boiler water and feed water inlets and outlet. The steam jet injector
may be supplied with steam from either the main boiler or a donkey boiler, the
action of the steam passing through the injector being to draw water through the
inlet from the boiler bottom or through the feed water inlet, and force such water,
or mingled waters, into the boiler by way of the check valve before referred to.
It will thus be seen that the apparatus may be used as a means of circulating the
water of a boiler, by withdrawing it from the bottom of such boiler and returning
it to the boiler at a higher point, or as means of introducing feed water to a boiler
mingled with water withdrawn from the bottom of such boiler, water being
admitted to the apparatus from the boiler bottom and feed supply alternately.

page_text: In the drawing hereto annexed is illustrated a combined boiler circulating and
feed heating apparatus arranged according to this invention, Figure 1 being a
sectional elevation and Figure 2 a plan thereof.
In the figures, A denotes the containing casing or chest. a is the inlet from the
boiler bottom; b the feed water inlet; c is the steam injection nozzle; and d is the
outlet leading to the boiler by way of a check valve. The inlets a and b are
controlled by valves e and f mounted on a common spindle g. The outlet dis
controlled by the valve which is of duplex construction, being provided with a
central passage and valve i through which passes the steam from the nozzle c.
The action of the apparatus is as follows:-
When used as a means of circulating the water of a boiler-for instance a marine
boiler steam from such main boiler or from a donkey boiler is admitted to the
nozzle c, which acts as an injector and draws water from the boiler bottom past the
valve e and through the valve h and forces it through the outlet d and check valve
(before referred to) back to the boiler at a higher point. When used as a feed
water heating device, such feed water-which may be supplied by feed pumps or
other source is admitted at the inlet and mixing with the boiler water in the
chest A is forced by the injector c into the boiler. Water then continues to enter
the apparatus from the feed supply and boiler bottom alternately as the pressure
on the valves e and ƒ varies and mingling in the chest A the temperature of the
feed water is thereby considerably raised before it enters the boiler.
By the use of apparatus according to this invention the water of a boiler
circulated while under any pressure; and by increasing the temperature of feed
may be
water before entry into the boiler, damage to such boiler by unequal contraction of
its parts, and consequent leakage, is prevented; the life of the boiler is materially
lengthened, and a decided saving of fuel is effected.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed, I declare that what
I claim is
1. A. combined boiler circulating and feed heating apparatus comprising a chest
or casing provided with inlets for boiler water and feed water, and an outlet
for such water or mingled waters provided with a steam jet injector and
connected with the boiler; arranged, combined and operating substantially as
herein described.
2. The employment in a combined boiler circulating and feed heating apparatus
of a duplex valve such as e. f., adapted to admit boiler water and feed water
alternately to such apparatus; substantially as described.
3. The employment in a combined circulating and feed heating apparatus of a
steam jet injector adapted to inject boiler water or feed water, or such waters
mingled, into a boiler; substantially as described.
4. A combined boiler circulating and feed heating apparatus arranged, combined,,
and operating substantially as herein set forth with reference to the drawings,
hereto annexed.
יו.נימ
J. A. COUBROUGH,
Registered Patent Agent,
10 St. George's Crescent, Liverpool, Agent for the Applicant.