Improvements in Boilers.
Year: 1898

page_text: Date of Application, 12th Jan., 1898
Complete Specification Left, 11th Oct., 1898-Accepted, 19th Nov., 1898
Mad
Improvements in Boilers.
We, THOMAS WILLIAM MAY and HENRY TADWELL DAVIS, Engineers, both of
John Penn & Sons, Limited, of Greenwich, in the County of Kent, do hereby
declare the nature of this invention to be as follows:-
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According to this invention we provide a separate feed chamber. or chambers for
tubulous or other boilers, such chamber or chambers being external to. but in free
communication with the boiler and so arranged that water is always retained in it
above the feed water admission valves without regard to the water level in the
boiler.
These feed chambers, may be made in the form of an appendage to the boiler
communicating with it by means of a narrow neck or in the form of one or more
inverted syphon pipes..
A cock or valve may be fitted close to the boiler so as to prevent the feed
chamber or chambers being in free communication with the boiler for a time but
such cock or valve is only fitted for purposes of examination or for use in case of
damage to any part of the system.
Dated this 11th day of January 1898.
THOMAS WILLIAM MAY.
HENRY TADWELL DAVIS.
Improvements in Boilers.
We, THOMAS WILLIAM MAY and HENRY TADWELL DAVIS, Engineers, both of John
Penn & Sous, Limited, of Greenwich, in the County of Kent, 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:―
According to this invention we provide a separate feed chamber or chambers for
tubulous or other boilers, such chamber or chambers being external to but in free
communication with the boiler and so arranged that water is always retained in it
above the feed water admission valves without regard to the water level in the
boiler.
These feed chambers may be made in the form of an appendage to the boiler
communicating with it by means of a narrow neck or in the form of one or more
inverted syphon pipes.
A cock or valve may be fitted close to the boiler so as to prevent the feed
chamber or chambers being in free communication with the boiler for a time but
ID 077

page_text: such cock or valve is only fitted for purposes of examination or for use in case of
damage to any part of the system.
Figures 1 show application to a tubulous boiler. A is the feed vessel. B is the
opening to the boiler by means of the valve C. D and D are feed regulating valves
of ordinary, make lifted by the pressure of water in the feed pipes E E and capable
of being held shut by regulating screws.
Figures 2 show the same thing done by means of syphon pipes the letters refer
to the same parts as in Figure 1. G is an air cock for escape of air when filling
the syphons.
It will be seen that the vessels or chambers are placed external to the boiler and
away from the fire and are not fire heated so that no ebullition occurs within them
thus allowing solid water to be present over the feed regulating valves and
preventing steam invading the feed pipes when the feed regulating valves are lifted
by pumps or injectors and so rendering them inoperative.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, we declare that what
we claim is :-
-
1. The combination with a boiler of an external chamber in communication with
it and the feed water admission valves and so arranged that water is always retained
in it above valves. ·
"
2. Apparatus substantially as described and illustrated in the drawings.