Improvements in Steam-boilers.
Year: 1889

page_text: Date of Application, 31st Oct., 1889
Complete Specification Left, 31st July, 1890-Accepted, 31st Oct., 1890
PROVISIONAL SPECIFICATION.
Improvements in Steam-boilers.
I FREDERICK CHARLES WINBY of Brighton in the County of Sussex, Civil Engineer,
do hereby declare the nature of this invention to be as follows:-
:-
This invention relates to certain improvements in steam-boilers and has for object
to increase the sectional area of cylindrical steam boilers for locomotive, marine and
other steam engines without increasing the lateral diameter in order to obtain an
increased heating surface by the insertion of an additional number of boiler-tubes.
In carrying the invention into effect I form the shell of the boiler in two segments,
one or both being greater than a semicircle. Where the shell plates of each segment
bisect each other they are connected together, from side to side, by one or more flat
plates which form the chord common to both segments.
By these means I secure an increased depth of boiler-body without adding to the
width, which, in the case of locomotive boilers, where the width is limited between the
engine wheels, will admit of great additional heating surface.
Dated 21st Octaban 1000
WM. JORDAN,
120, Chancery Lane, London, W.C., Agent for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Steam-boilers.
I FREDERICK CHARLES WINDY of Dover House, Clifton Hill Brighton in the County
of Sussex Civil 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 to certain improvements in tubular steam boilers for loco-
motives and has for object to increase the area of the tube-plate, without unduly
increasing the lateral diameter of the boiler body, to secure additional heating surface
by introducing an additional number of boiler tubes.
In carrying the invention into effect I proceed as follows:-
The shell of the boiler is formed in two segments of cylinders, superposed and it is
an advantage that one or both segments should be greater than a semicircle.
At the point where the curves of the shell plates of each segment intersect or meet
each other they are jointed and connected together transversely by one or more plates
which forms or form the chord or tie-plate common to both segments.
By these means I am able to secure an increased depth of boiler-body without
adding to the width which is limited to that between the engine wheels, I thereby
obtain a greater area of the tube plate for the insertion of tubes and so obtain a greatly
additional tubular heating surface.
In order that the said invention may be well understood there is annexed hereunto
a sheet of drawings illustrative thereof wherein :-
Fig. 1 is a vertical cross section of one modification of my improved construction
of boiler with the upper and lower cylindrical segments between driving wheels having
large diameters.
Fig. 2. shows in like view a modification wherein the upper cylindrical segment of
the boiler body is of greater diameter than the lower segment and mounted between
wheels of lesser diameter.
Fig. 3. is a detail view showing the mode in which the shell plates and transverse
chord tie-plate may be jointed.

page_text: Fig. 4. is a half plan of the tie-plate. Like letters of reference indicate similar
parts in all the drawings.
The duplo-cylindrical body of the boiler shown in Figs. 1 and 2 has the two segmental
parts A A¹, the same being two segments of cylinders. It is obvious that the relative
sizes of the segments may be made to vary as required within reasonable limits.
The shell plates are joined together at B and the arcs of their curvature intersect
each other at that point.
B is the transverse connecting chord or tie-plate.
The construction of fire-box which I find may be used with great advantage is that
described in the Specification of my Patent No. 17849 Novr. 8th 1889.
In reference to Fig. 3 the shell plates A A¹ come to the chord plate B¹ and the angle
plates A2 are laid above and below the chord-plate B¹ inside the shell plates A A' and
the cover plate B is placed on the outside and all are then rivetted in position.
The tie-plate B as will be clearly seen by reference to Fig. 4 is provided with
perforations for circulation of the water, and the ends longitudinally are free from the
fire-box tube-plate and the tube-plate of the smoke box.
Having now described the nature and particulars of my said invention and in what
manner the same may be performed I declare that what I claim is :—
First. A steam boiler suitable for being used in locomotive engines constructed
substantially as herein described.
Secondly. In a steam boiler for locomotive engines the use of shells such as A A
formed of two segmental parts superposed one upon the other connected by a tie-plate
or.plates such as B' substantially as herein described and illustrated in the annexed
drawings.
In the presence of
WALTER A. BARLOW,
Consulting Engineer and Patent Expert,
46, Chancery Lane, London, W.C.
FRED. CHAS. WINBY.