A METHOD OF AUTOMATICALLY DETERMINING THE FEED OF STEAM BOILERS TO MAINTAIN CONSTANT WATER LEVEL
Year: 1884

page_text: .
İ, CHARLES DENTON ABEL of No 28 Southampton Buildings, Chancery Lane,
in the county of Middlesex, Consulting Engineer and Patent Agent, do hereby
declare the nature of the said invention for "A METHOD OF AUTOMATICALLY
DETERMINING THE FEED OF STEAM BOILERS TO MAINTAIN CONSTANT WATER LEVEL "
to be as follows:-
According to this invention, the small engine or donkey, usually employed to
work the feed pump of a steam-boiler, has its supply-pipe connected to the boiler
at the level which the water should have in the boiler. While the water remains
below that level, the donkey engine receives steam and works the feed pump; but,
should the water in the boiler rise above the proper level, then the donkey engine,
receiving water instead of steam, works more slowly, giving less feed to the boiler;
not only so, but the donkey engine itself, by withdrawing water from the boiler
rapidly lowers the level of the water therein. The discharge from the donkey
engine should be led into the feed water supply tink, so as to heat the feed
water.
ABEL & IMRAY,
Agents for the Applicant,
28, Southampton Buildings,
London, W.C.

page_text: I, CHARLES DENTON ABEL of No 28 Southampton Buildings, Chancery Lane,
in the county of Middlesex, Consulting Engineer and Patent Agent, do hereby
declare the nature of my said invention for "A METHOD OF AUTOMATICALLY
DETERMINING THE FEED OF STEAM BOILERS TO MAINTAIN CONSTANT WATER LEVEL,"
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, the small engine or donkey, usually employed to
work the feed pump of a steam boiler, has its supply pipe connected to the boiler
at the level which the water should have in the boiler. While the water remains
below the level, the donkey engine receives steam and works the feed pump; but,
should the water in the boiler rise above the proper level, then the donkey engine,
receiving water instead of steam, works more slowly giving less feed to the boiler;
not only so, but the donkey engine itself, by withdrawing water from the boiler,
rapidly lowers the level of the water therein. The discharge from the donkey.
engine should be led into the feed water supply tank so as to heat the feed water.
The accompanying drawing illustrates an arrangement of feed of the kind described -
applied to a boiler G. The donkey engine B which works the pump A is supplied
through valve C opening from the boiler just above the water level M N. The
exhaust from the engine B is led into the feed cistern D. When the water in the
boiler rises above M N, the engine is supplied with water instead of steam and
consequently becomes retarded or stopped until the water is again lowered in the
boiler. The exhaust from the engine heats the feed water in the cistern D, and
when it happens that the engine is supplied with water instead of steam, the
discharged water is received back into the cistern D.
Obviously the arrangement described can be applied to boilers of various kinds
and also to feed engines of different forms, care being taken that the slides or
valves of the engine are so arranged that the engine shall not become choked when
it is supplied with water instead of steam.
Having now particularly described and ascertained the nature of niy said
invention and in what manner the same is to be performed, I declare that what
I claim is
The herein described method of automatically determining the feed of steam
boilers to maintain constant water level by arranging the steam supply pipe of the
feed engine so as to open from the boiler at the water level.