other Parts Exposed to Heat.
Year: 1886

page_text: Date of Application, 8th Dec., 1886
Complete Left, 8th Sept., 1887.
Complete Accepted. 11th Oct., 1887.
RESERVE
other Parts Exposed to Heat.
I, ALFRED AUSTIN RICKABY, of Bloomfield Engine Works, Sunderland, in the
County of Durham, Engineer, do hereby declare the nature of this invention to be as
follows:-
The system essentially consists in automatically raising a column or columns of
heated water, above the level in boiler, by the steam generated; which column or
columns descending by gravity, displace the colder water in the lower parts of the
boiler and cause it to be heated by being brought in contact with surfaces exposed to
the fire, the currents caused by the rapid circulation also preventing deposit of scale
especially on the crowns of the furnaces.
Over the furnace crowns or other parts from which steam is chiefly generated I
place inverted dish shaped vessels disposed so as to gather into them the steam as it
rises and carry it into pipes rising from the gathering vessels to a considerable height
above the level of the water in the boiler and there bent downward with their open
mouths entering at a point above the water level the enlarged mouths of pipes which
descend into the water in the lower portions of the boiler with open ends.
Steam being generated from the furnace crowns, or other parts covered by the
gathering vessels, is compelled to ascend through the pipes, causing the water in them
to rise with it above the level of that in the boiler and the steam and water to overflow
the bent ends and discharge into the mouths of the descending pipes at which point
the steam is liberated and passes into the steam space, while the hot water by the
weight of the additional column descends into the lower parts of the boiler and
1

page_text: displaces the colder water lying there and this continues until the temperature of the
water in all parts is equalised or nearly so.
After steam is raised to the working
pressure the circulation still continues and prevents colder water introduced by the
feed remaining in the lower portions of the boiler.
The steam which is so rapidly generated on the intensely heated furnace crowns
passes up the pipes leading from the inverted vessels with great velocity, owing to the
reduced area, and the water rushing up the furnace sides and over the crowns to
replace the steam causes a current which prevents the formation of scale.
Dated this 8th day of December 1886.
W. LLOYD WISE,
Per F. J. Brougham.
46, Lincoln's Inn Fields, London, W.C.,
Agent for the Applicant.

page_text: COMPLETE SPECIFICATION.
An Improved System of Promoting Circulation of Water in Steam
Boilers, and Preventing the Deposit of Scale on Furnaces or
other Parts Exposed to Heat.
I, ALFRED AUSTIN RICKABY of Bloomfield Engine Works, Sunderland in the
County of Durham, 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 system essentially consists in automatically raising a column or columns of
heated water, above the water level in boiler, by the action of the steam generated;
which column or columns descending by gravity, displace the colder water in the lower
parts of the boiler and cause it to be heated by being brought in contact with surfaces
exposed to the fire, the currents caused by the rapid circulation also preventing deposit
especially on the crowns of the furnaces."
Over the furnace crowns, or other parts from which steam is chiefly generated, I
place inverted dish shaped vessels disposed so as to gather into them the steam as it
rises and carry it into pipes rising from the gathering vessels to a level above that of
the water with open mouths into the steam space of boiler and at about the water line
is a branch pipe which passes downward into the lower portion of the boiler amongst
the colder water and there terminates with an open mouth.
Steam being generated from the furnace crowns or other parts covered by the
gathering vessels is compelled to ascend through the pipes, causing the hot water in
them to rise with it above the level of that in the boiler, when the steam escapes into
the steam space, while the hot water, by the weight of the additional column, descends
into the lower parts of the boiler and displaces the colder water lying there and this
continues until the temperature of the water in all parts is equalised or nearly so.
After steam ss raised to the working pressure the circulation still continues and
prevents colder water introduced by the feed remaining in the lower portions of the
boiler.
The steam which is so rapidly generated on the intensely heated furnace crowns
passes up the pipes leading from the inverted vessels with great velocity owing to the
reduced area and the water rushing up the furnace sides and over the crowns to
replace the steam causes a current which prevents the formation of scale.
DESCRIPTION OF DRAWINGS.
The accompanying drawings shew my invention applied to an ordinary marine
boiler of which Fig. 1 is a longitudinal section and Fig. 2 a transverse section and
with the circulating apparatus applied at two points over each furnace crown, over top
of flame box or combustion chamber and over the tubes but it will be understood that
one or more sets of circulators may be applied to any one of these parts or to all of

page_text: them as may be necessary. The formation of the upper ends of the circulating
apparatus is that which I prefer as being more simple than the bent down ascending
pipe into the open mouth of the descending pipe as described in provisional Specifica-
tion, though I may in some cases adopt that method.
A,A, A, are the inverted dish shaped vessels into which the steam generated is gathered
and passes up the ascending pipes B, B, B, as indicated by the arrows, among the water
therein, which it raises above the water line in the open mouths in steam space into
which the steam escapes as shown by dotted arrows the hot water by the difference of
level passing down the descending pipes C, C, C, as shown by the arrows, among the
cold water in the lower portions of the boiler. The rapid passage of the particles of
steam over the furnace crowns, on their way to the ascending pipes keeps the water
constantly agitated and prevents the deposit of scale.
Having now particularly described and ascertained the nature of said invention
and in what manner the same is to be performed I declare that what I claim is :
Promoting Circulation of water in steam boilers, and preventing deposit upon the
furnace crowns or other parts thereof, by raising a column or columns, of heated
water above the general water level by ascending currents of steam gathered into
pipes from the furnace crowns, or other rapidly generating surfaces; said columns by
gravity causing descending currents of heated water through pipes to displace the
colder water in lower portions of boiler and cause it to be brought into contact with
heated surfaces substantially as described and shown.
m L
1
1
A
1000
CHID
T. J. DANSON, F. Inst. P.A.,
2, St. Nicholas' Buildings, Newcastle-upon-Tyne,
Agent for Applicant.