A Tube or Vessel for Use in the Construction of Water Tube Boilers or other Steam Generators.
Year: 1896

page_text: Date of Application, 17th Jan., 1896-Accepted, 29th Feb., 1896
COMPLETE SPECIFICATION.
A Tube or Vessel for Use in the Construction of Water Tube Boilers
or other Steam Generators.
I CHARLES WILLIAM DODGIN Shipbuilder and Engineer of The Dockyard
Lydney in the County of Gloucester 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 :-
The tube or vessel is to be composed of iron, steel or other suitable metal, and is
to be made of plates of proper thickness bent to a suitable curvature and joined
to iron or steel or other metal angle frames by rivets. The outer frame in
every case is to be attached to the inner frame by bolts, or, so as to be easily
removed and replaced.
.
In the drawing attached Fig. 1. shows the sectional form of one class of tube or
vessel, and is a section on line dd (Fig. 3). This tube or vessel is intended to
be used with its convex surface (o Fig. 1) towards the fire.
Fig. 2 is an elevation of the end of this form of tube or vessel at b-Fig. 3.
Fig. 3 is an elevation of the concave surface-a Fig. 1-and
Fig. 4 a section of the same vessel on line c. c-Fig. 3.
Figure 5 shows another form of tube or vessel where the concave surface p-
Fig. is intended to be placed next the fire and is a section on line h. h-Fig. 7.
Figure 6 is an elevation of the end of this form of vessel at f.-Fig. 7.
Figure 7 is an elevation of the concave surface at e-Fig. 5-and
Figure 8 is a section of this form of vessel on line 9. g.-Fig. 7.
At . Fig. 1-and at m. m'-Fig. 5-are shown the method of attaching the
curved plates to angle frames and the angle frames to each other by bolts, but if it
be found advisable a flange may be bent out of or forged upon each or either of the
plates used and these flanges may be connected to each other by bolts as shown or
by any other means.
Tubes of these forms or variations of these forms carrying out the principle of
enclosing a space between bent plates are intended to be used of any size or
length and may be varied in curvature to suit any case. They may be placed
horizontally, vertically or inclined and any number of them may be used in a
steam generator. They are to be connected with a suitable steam receiver by
circular tubes of small diameter as shown at k Fig. 1 k Fig. 5 or in the manner
best adapted for the purpose they are intended to serve. The tubes with their
convex surface next the fire shown in Figures 1, 2, 3 & 4 are intended to provide
beating surface. The tubes with their concave surface next the fire shown in
Figures 5, 6, 7, & 8 are adapted for use with a larger number of small tubes k'
leading to the steam receiver which will in themselves form a boiler casing and
are also adapted for use in small types of steam generators.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner it is to be performed I declare that what I claim is
(1.) The invention of forms of tubes or vessels with a space for water or
steam between two plates curved in the same direction of such construction that
the outer plate is in each case removable so that any small tube may be removed
without disturbing the remainder of the boiler and of such a form that less
CO

page_text: water is carried and more strength provided owing to the absence of flat
surfaces. To the best of my belief these forms of tubes or vessels have never been
aised in the construction of water tube boilers or other steam generators.
Dated this Twelfth day of February 1896.
C. W. DODGIN.