Improvements in Steam Generators applicable for Heating Purposes.
Year: 1889

page_text: Date of Application, 22nd Nov., 1889
Complete Specification Left, 18th Sept., 1890-Accepted. 18th Oct., 1890
PROVISIONAL SPECIFICATION.
Improvements in Steam Generators applicable for Heating
Purposes.
I, JOHN MORRIS NEWTON, of Clarence Street, Stalybridge, in the County of
Lancaster, Mechanical Engineer, do hereby declare the nature of this invention to be
as follows:-
This invention relates chiefly to that class of apparatus for generating steam for
heating purposes but may also be applied to other purposes.
The apparatus is constructed in three superimposed sections or compartments
each, for the water or steam and for the fire or products of combustion. The
water space in the lower section or division is composed of vertical tubes projecting
down into the furnace; in the middle section of an annular chamber to which the
vertical tubes are attached; and in the upper section or chamber of one, two, or
more coils; and the space for the fire or products of combustion is composed, in the
lower section of the furnace into which the vertical tubes project; in the middle
section of vertical tubes passing through the annular water chamber; and in the
upper section of a chamber in which the products of combustion pass around the
exterior of the coils.
In the upper chamber preferably in the centre of the coils is a fuel chamber or
magazine which communicates through the central chamber with the furnace which
is closed and without a draught through it to prevent the products of combustion
entering amongst the fuel.
The size of the sections and the number of the several tubes and coils will depend
upon the capacity of the generator.
At present I prefer to have three sets of the vertical water tubes disposed annularly
the outer ones being longer than the inner ones, two sets or rings of the vertical
smoke tubes, and two steam coils. The outer and inner sets of vertical water tubes
I prefer to make with a longitudinal diaphragm or division plate and the middle set
with an inner tube to direct the circulatory current of the water.
To facilitate the cleansing of the apparatus or blowing off of the water contained
therein the vertical water tubes and preferably the outer set may be formed with
caps or plugs at the end or may be connected together at or near the bottom by a
ring or tube connected to each. Or into the vertical water tubes may depend a thin
or narrow tube open at the bottom and connected in a series at the top by which they
may be blown through. The pipe joining or connecting these inner tubes is preferably.
laid on the bottom plate of the central water chamber and is provided with holes or
perforations at intervals so that any mud or deposit accumulated thereon may also be
blown out. Where such depending tubes are used the diaphragm or division plate
may be attached thereto by straps or otherwise.
The vertical water tubes may be made corrugated or partly corrugated or with.
projecting ribs or flanges the corrugations ribs or flanges running longitudinally
o present a greater heating surface to be exposed to the action of the fire.
The outer wall of the furnace will be formed of a nonconducting material.
preferably encased by a shell of steel or iron plate. This material may be of fire
lay in the form of bricks or tiles or of a friable or fibrous material such as loose
ire clay sand earth silicate-cotton asbestos or the like. When bricks or tiles are.
sed they should be shaped to fit against the outer half of the outside ring of vertical
vater tubes leaving about half of the surface of each of these tubes exposed to the.
The bricks or tiles are built up from and supported by the ash box at the bottom
f the furnace.. Where a friable or fibrous nonconducting material .is.used a metal
late will be inserted in the interstices between the tubes forming the outside ring or,
re.
f Dino17

page_text: around such tubes to prevent the material falling into the furnace and support will be
given to the boiler by upright stays connected to the ash box.
The furnace will be constructed with fire bars of any suitable or ordinary con-
struction and with an ash box situated below them.
The apparatus may be made so as to be easily divided into two or more parts for
the purpose of facilitating examination or renewal of the parts or for the purposes of
packing or of transport." I prefer to make a division through the central water
chamber and attach the smoke tubes which pass through this chamber permanently
to the bottom plate which forms the crown of the furnace and secure them by nuts
and screws to the top plate thereof. By unfastening these nuts and the connections
at the side of the chamber the top part may be easily removed or replaced.
The fuel chamber or magazine will be filled with fuel such as coke or coal which
will gradually descend into the furnace and the products of combustion will pass
through the vertical smoke tubes into the upper chambers around the steam coils and
will pass off through the flue which leads therefrom. The water will be fed to the
generator from a feed apparatus of any ordinary or suitable construction such as at
present in use for this class of generator. The heating pipes which carry off the
steam will be attached to the upper members of the steam coils.
Dated this 21st day of Novemb 1000
WM. P. THOMPSON & Co.,
6, Bank Street, Manchester, Patent Agents.
COMPLETE SPECIFICATION.
Improvements in Steam Generators applicable for Heating
Purposes.
I, JOHN MORRIS NEWTON, of Clarence Street, Stalybridge, in the County of
Lancaster, Mechanical 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 :-
This invention relates chiefly to apparatus used for the generating of steam for
heating purposes but may also be applied to the generating of steain for power or
other purposes.
The apparatus is constructed with three superimposed sections or compartments
for the water and steam two of which sections will be filled with water and the third
will serve as a steam chest or dome; and with three corresponding sections or divisions
for the fire and products of combustion of these one section is the furnace, the
second section is comprised of a series of smoke tubes and the third is a sinoke box.
The invention will be fully described with reference to the annexed drawings.
Fig. 1 is a vertical section of steam generator constructed according to this
invention.
Fig. 2 sectional plan of same on line a.
Fig. 3 enlarged sectional elevation of tube A with diaphragm D¹.
The apparatus is constructed with a view of presenting a large surface to the
burning fuel and heated gases therefrom and at the same time to contain a relatively
small quantity of water.
The three sectious or compartments A, B, and C, which contain the water and steam
are each brought into direct contact with the heated gases either in the furnace or as
they escape therefrom.
The lower section A is composed of a number of vertical tubes closed at the bottom
which project down into the furnace. The tubes A I prefer to dispose in concentric
rings two such rings of tubes are shown in the drawings, for a larger structure three
concentric rings of tubes may if desired be used and for a smaller generator a single
ring of tubes may be used. These tubes are closed at the bottom and fitted tightly
into a plate which forms the bottom of the central section B. The central section B
is a cylindrical water chamber into which the top and open ends of all the tubes A.
-open.

page_text: In each of the tubes A is inserted a small pipe D which is open at the bottom, and
at the top the several pipes D are connected together into one series by the annular
pipes E terminating in a blow off pipe e outside the boiler. By opening the blow off
tap any mud or sediment that may have accumulated in the bottom of the tubes A
5 is blown out. el is the steam return pipe and ell the water inlet pipe.
In addition to the blow off pipes D in the tubes A there may be placed in each a
vertical diaphragm D' across the tube extending from the top nearly to the bottom to
direct the circulatory current of the water therein (as shewn in Fig. 3).
Where these diaphragms are. used they may be attached to the blow off pipes
O by straps d or otherwise which will serve as a support for them.
The second section B is composed of the two plates bb' and the cylindrical plate 6
bolted or riveted together.
D
The third section (comprises a cylindrical steam chamber or chest connected by
vertical pipes or tubes C with the section B. This steam chamber may be constructed
of one or more coils of tubing connected together as described in the Provisional
Specification but I find that a cylindrical chamber or dome such as C connected to the
section B by two or three pipes. C₁ is better, being easier to construct and less liable
to prime.
The chamber C is formed of the top and bottom plates c c¹ connected together by
the side plate c and stayed by bolts c. The steam is carried off by the pipe F
which is perforated for about half its length the lower end being carried down and
secured to the bottom plate c to act as an additional stay. The lower end of the pipe F
is stopped up by a cap f.
The three sections or compartments G. H and I form the space for the fire and
heated products of combustion. The lower one of these G, is the furnace into which
the water tubes A depend. The second section H is composed of the series of smoke
tubes passing through the section B and connected by nuts to the plates bbl.
The third section I is the smoke box surrounding the steam chamber C from which
the smoke passes by the flue i shown in dotted lines.
In the Provisional Specification I have described a fuel chamber or magazine in
the centre of the smoke box to feed fuel to the furnace section G. This I now find
is not required and I prefer to use a long oblong feed door placed vertically in the
side of the furnace section G, and remove a tube A from each of the rings of tubes
to allow of the fuel being thrown into the centre of the furnace.
The vertical water tubes A may be made corrugated longitudinally or with
longitudinal ribs or flanges to present a greater heating surface to be exposed to the
action of the fire.
The outer walls of the structure are preferably made of plates of iron or steel in
three sections J, K, L, one above the other connected or fastened together by bolts or
rivets. The top section L and bottom section J are preferably riveted into short
cylinders but the central section K which encloses the furnace is made of two semi-
cylindrical pieces with angle iron flanges at the edges K and secured together by
bolts so that they may be readily placed in position and secured around the brick lining
of the furnace.
The furnace G is lined with fire bricks M or other non-conducting material such as
fire clay in the form of tiles or of a friable or fibrous material such as loose fire clay,
sand, earth, silicate-cotton asbestos or the like. Bricks or tiles are built up from
and supported by the ash box N at the bottom of the furnace. Where a friable or
fibrous non-conducting material is used a sheet metal cylinder will be placed around
the tubes to prevent the material falling into the furnace.
The furnace G is constructed with rocking fire bars O of any suitable or ordinary
construction to facilitate the breaking up and removal of clinker and with an ash-
box N situated below them.
The apparatus thus made is easily divided into three or more parts for the purposes
of transit or for facilitating the examination or renewal of the parts and I consider
hat it will be a very safe boiler.

page_text: Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
1. A steam generator constructed with a lower water section of vertical tubes
depending into the furnace, a central cylindrical water section with smoke tubes
passing through it into which the vertical water tubes open and a top section or
steam chamber connected by pipes with the other section and surrounded by a smoke-
box substantially as described.
2. In a steam generator the combination with vertical depending water tubes
closed at the bottom-and with or without a longitudinal diaphragm-of a hlow
off pipe extending nearly to the bottom of each substantially as described and shown.
3. A steam generator applicable for heating or other purposes constructed with
the several parts arranged together substantially as described and shown.
1000
WM. P. THOMPSON & Co.,
Manchester, Liverpool, and London, Patent Agents.
WM. P. THOMPSON & Co.,
Manchester, Liverpool, and London, Patent Agents.