Improvements in Feed-water Heaters for Steam Boilers.
Year: 1893

page_text: Date of Application, 15th Feb., 1893
Complete Specification Left, 24th June, 1893-Accepted. 12th Aug.. 1893
PROVISIONAL SPECIFICATION.
Improvements in Feed-water Heaters for Steam Boilers.
We WILLIAM SHORE and GEORGE COUPE both of Shelton, Hanley, in the
County of Staffordshire, Engineers, do hereby declare the nature of this invention
to be as follows :-
This invention relates to feed water heaters for heating the water supply of steam
boilers as it passes on its way to the latter the object being to construct such a
heater in which the steam-or water-tubes will be free to expand or contract.
The invention consists essentially of a cylindrical or other shape of chamber
divided into three distinct compartments, the middle chamber constituting the tube
chamber the end plates of which carry the tubes and allow the latter to expand or
contract without impediment.
In carrying out our invention we provide, preferably, a cylindrically shaped
chamber and divide it into three compartments, the middle compartment forming
the tube chamber whilst the top one forms a kind of cover for the tubes and the
bottom a settling chamber. These compartments combined are provided with
inlets for the cold water and exhaust steam and outlets for the latter and the hot
water. The medium for dividing the chamber into three compartments are two
tube plates one of which is rigid whilst the other is free to move in accordance with
the expansion or contraction of the tubes which are rigidly connected to them.
The water to be heated may either pass through the tubes and the steam outside
the same or vice versa.
In order to make a good joint between the top tube plate and the chamber we
insert a flexible packing which is forced by the water pressure and the press due
to the longitudinal expansion of the tubes into a suitable groove formed between
the tube plate and casing.
Dated this 13th day of February 1893
Per pro EMMOTT & CO., LIMITED,
Robert Wood, Secretary,
New Bridge Street, Manchester, and 391, Strand, London,
Agents for the Applicants.
COMPLETE SPECIFICATION.
Improvements in Feed-water Heaters for Steam Boilers.
We, WILLIAM SHORE and GEORGE COUPE, both of Shelton, Hanley, in the
County of Stafford, Engineers, 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:-
This invention relates to feed-water heaters for heating the water supply of steam
boilers as it passes on its way to the latter the object being to construct such a
heater in which the steam, or water-tubes will be free to expand or contract.
The invention consists essentially of a cylindrical or other form of chamber
divided into three distinct compartments, the one in the middle constituting the
'tube chamber, the end plates carrying the tubes, and the parts connected with them
being so arranged that the tubes are free to expand or contract without impediment.
The invention will be fully described with reference to the accompanying
drawing in which Fig. 1. is an elevation of a feed-water heater constructed in
accordance with our invention whilst Fig. 2. is a vertical section of same showing
the internal construction.

page_text: In carrying out our invention we preferably provide a cylindrically shaped
casing, though one of other shape may be used if desired and divide it into three
compartments A. B. and C., A. being the top or what we might term the hot water
chamber, B. the tube chamber and C. the settling chamber for sediment.
The bottom chamber C. is provided with an inlet c for the water to be fed to the
boiler, this inlet being provided with a tube c¹ having perforations through which
the water can pass and yet retain any floating matter contained in the water.
The chamber C. is also constructed with a hand-hole c" and with a hole c¹¹l
communicating with a blow-off cock by means of which the sediment which collects
in the chamber may be cleared away, the conical form of the chamber allows this
to be done very efficiently.
The tube chamber B. is provided with an inlet and outlet B¹, and B" for the
exhaust steam which is utilised to heat the water as it passes on its way through
the tubes b to the chamber A.
It is the manner of arranging the tubes and tube plates of this chamber so that
the former can expand or contract that our invention chiefly relates. We rigidly
attach the tubes 6 to the plates 61, 6 and make either of these, preferably the top.
one b so that it is free to move longitudinally and in order to make a joint between
the plate and the upper chamber or cover A. we bevel the edge or recess it in some
convenient manner and form a similar bevelled surface or recess on the bottom end
of the cover A. or other convenient part of the chamber. Between the surfaces
thus formed we insert a flexible ring of packing material a so that when the tubes
expand a tight joint is formed. In this way the tubes are free to expand or
contract without impediment. The chamber A. is provided with an outlet a¹ for
the heated water. The water to be heated may either pass through the tubes, as
shown, and the steam outside the same or vice versa.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is
1. A feed-water heater having one of its tube plates arranged to make a joint
with the casing in such a manner that the tubes may freely expand and contract
substantially as described.
2. A feed-water heater with one of the tube plates arranged as herein before
described constructed and arranged substantially as described and shown with
reference to the accompanying drawings.
✓ Dated this 19th day of June 1893.
Per pro EMMOTT & CO., LIMITED,
Robert Wood, Secretary,
2, New Bridge Street, Manchester, and 85, Strand, London,
Agents for the Applicants.