Improvements in Water Tube Steam Generators.
Year: 1899

page_text: PROVISIONAL SPECIFICATION.
Improvements in Water Tube Steam Generators.
We, JOHN EDWARD SLACK, of Chester Road, Manchester, in the County of
Lancaster, Mechanical Engineer, and HAMMERSLEY HEENAN, M.I.C.E., M.I.M.E.,
of Newton Heath Iron Works, Manchester, aforesaid, Civil Engineer, do hereby
declare the nature of this invention to be as follows: -
This invention is designed to provide for the better supply of water to the lower
water tubes of tubulous boilers.
As at present generally constructed the tubes in vertical rows are connected by
vertical or upright headers (which may be somewhat inclined) such headers being
supplied with water by a single tube at the upper end so that the water as it flows
or circulates reaches and feeds the upper and cooler tubes first.
This invention consists essentially in constructing the boiler with each set or
section of tubes taken horizontally connected at each end to a horizontal header
and such horizontal headers connected by one two or more preferably vertical
tubes with the steam and water drum-thus the bottom row of tubes which
receives the hottest flame and gases and each successive horizontal row of water-
tubes have their water supply direct from the steam and water drum.
In carrying out the invention we place the water tubes in a series of rows and
connect the ends of each row taken horizontally with a horizontal header into
which the ends of the tubes are expanded or otherwise secured.
The headers at both ends of each set of tubes we connect with the steam and
water drum by one two or more upright tubes preferably somewhat inclined to be
at right angles to the tubes. These upright tubes therefore connect each set of
water tubes direct with the drum.
To allow for the upright tubes passing up to the drum the headers are set in
steps one before the other but if desired to have the headers all in the same plane
the tubes connecting them with the drum may be brought in at the ends or sides.
These tubes are attached to the drum and to the header in any ordinary or
suitable way.
Each horizontal header is provided with a blow off cock or tube so that there is
a separate blow off for each horizontal row of tubes.
By this arrangement of tubes a better form of furnace is obtained as a space
is formed covered by a plate or bridge which provides a combustion chamber in
which more complete combustion takes place and from which the gases spread
amongst the tubes.
Dated this 16th day of August 1899.
WM. P. THOMPSON & Co.,
6, Bank Street, Manchester, Patent Agents.

page_text: Improvements in Water Tube Steam Generators.
We, JOHN EDWARD SLACK, of Chester Road, Manchester, in the County of
Lancaster, Mechanical Engineer, and HAMMERSLEY HEENAN, M.I.C.E., M.I.M.E.,
of Newton Heath Iron Works, Manchester, aforesaid, Civil Engineer, do hereby
declare the nature of this invention and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement: -
This invention is designed to provide for the better supply of water to the lower
water tubes of tubulous boilers.
As at present generally constructed the tubes in vertical rows are connected by
vertical or upright headers (which may be somewhat inclined) such headers
being all supplied with water by a single tube at the upper end so that the
water as it flows or circulates reaches and feeds the upper and cooler tubes first
often leaving the lower tubes which are in the hottest part of the furnace with an
insufficient supply of water causing them to be burnt or damaged. This invention
effectually prevents any such damage occuring.
This invention consists essentially in constructing the boiler with each set or
section of tubes taken horizontally connected at their end to a horizontal header
and such horizontal headers each separately connected by one two or more
(preferably vertical) tubes with the steam and water drum-thus the bottom row
of tubes which receives the hottest flame and gases and each successive horizontal
row of water tubes have their water supply direct from the steam and water drum.
The invention will be fully described with reference to the accompanying
drawings.
Fig. 1. Is a side elevation of the boiler (parts of furnace being in section).
Fig. 2. Plan of same (upright tubes E removed).
Fig. 3. End elevation from front.
Fig. 4. End elevation from back.
Fig. 5. Transverse section.
Fig. 6. End elevation of a modification.
Fig. 7. Side elevation of another modification.
Fig. 8. End elevation of Fig. 7.
The water tubes A are placed in a series of horizontal rows and the ends of the
tubes forming each horizontal row are connected to or inserted in a horizontal
header B the ends of the tubes A being expanded or otherwise secured therein.
Each of the headers B at both ends of each horizontal set of tubes A are
separately connected with the steam and water drum D by one two or more
preferably two upright tubes E slightly inclined to the vertical but at right
angles to the tubes A which are set at an inclination of about 30 degrees.
The upright tubes E connect each horizontal set of water tubes A direct with
the drum D.
The headers B are preferably arranged or set in steps one in advance of the
other (see Fig. 1) to permit of the upright tubes E passing in a straight line
to the drum D. Where however it is desirable to have the headers B all in the
same plane the tubes E connecting them with the steam and water drum D are
brought in at the ends as in Figs. 7 and 8 each horizontal set of tubes A as
before being separate and separately connected with the steam and water drum D.
'As shown in Fig. 6 the headers B may be arched instead of flat.
The connecting tubes E are attached to the drum D and to the headers B in
any ordinary or suitable way.
The tubes E connected with the header B of the lower set of horizontal tubes A

page_text: are provided with a projecting end e to project into the interior of the drum D so
that any sediment in the drum D will not flow into the lower and hotter tubes.
Each horizontal header is provided with a blow off cock or tube F so that
there is a separate blow off for each set of horizontal tubes A.
By this arrangement of tubes a better form of furnace is obtained as a
chamber H is formed between the tubes A covered by a plate or bridge K which
provides a combustion chamber in which more complete combustion takes place
and from which the gases spread amongst the tubes A.
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 water tube boiler constructed with each horizontal set of tubes connected
separately with the steam and water drum whereby each set receives a direct and
separate flow of water from the drum substantially as described.
2. A water tube boiler constructed with a number of sets of water tubes each
set attached at the ends to a horizontal header and connected directly through
the header by separate connecting tubes to the water and steam drum whereby
each set receives a direct and separate flow of water from the drum substantially
as described.
3. A water tube boiler constructed and arranged substantially as described
and shown with reference either to Figs. 1 to 5, Fig. 6. or Figs. 7 and 8 of the
drawings.
LITES
en ner
01 May 1900.
WM. P. THOMPSON & Co.,
Manchester, Liverpool & London, Patent Agents.