Improvements in Steam-boilers.
Year: 1890

page_text: Date of Application, 10th May, 1890
Complete Specification Left. 1st Oct.. 1890-Accepted. 1st Nov., 1890
PROVISIONAL SPECIFICATION.
Improvements in Steam-boilers.
I, JOHN ROBINSON of School Street St. Georges Wallington Shropshire Engineer
do hereby declare the nature of this invention to be as follows:-
For
This invention relates to improvements in steam boilers especially of the class
known as vertical multitubular boilers and has for its object to raise steam more
expeditiously with a greater economy of fuel than has hitherto been the case.
this purpose I construct my improved boiler with one or more rows of vertical tubes,
passing through the water space between the fire box and outer shell. of the said
boiler. These tubes are connected at their lower ends to a tube plate fixed to the fire
box a short distance (about a foot) about the fire bars, and at their upper ends they
are connected to another tube plate fitted in the top part of the boiler. By this
means the heated gases ascending throngh these tubes, assist to beat the water
surrounding the fire box which has hitherto been heated only by the fire box
itself.
Dated this 10th day of Mov 1800
RAYNER & CASSELL,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Steam-boilers.
I, JOHN ROBINSON of School Street, St. Georges Wallington Shropshire, 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 improvements in steam boilers more especially of the class
known as verticular multitubular boilers, and has for its object to raise steam more
expeditiously and with a greater economy of fuel than has hitherto been the case with
boilers of similar construction. For this purpose I construct my improved boiler
with one or more rows of vertical fire tubes passing through the water space between
the fire box, and outer shell of the boiler. These tubes are connected at their lower
ends to a tube plate fixed to and projecting from the outside of the fire box a short
distance (about a foot) above the fire bars, the upper ends of the said tubes being
connected to another tube plate fitted in the top part of the boiler.
By this means the heated gases passing up through these tubes assist to heat the
water surrounding the fire box, which water has hitherto been heated by the fire
box only.
And in order that my invention may be the more fully understood I will describe
the same with reference to the accompanying sheet of drawings, in which
Fig. 1. represents a vertical section and
Fig. 2. a horizontal section on the line x, x, Fig. 1. of one of my improved
boilers.
C
a is the cuter shell, the fire box and c the water space between the shell and fire
box. d, d are vertical fire tubes passing through the water space c, and which may consist
of a single row as shewn or of two or more rows. The lower ends of these tubes are
screwed or otherwise attached to a tube plate e, fixed to and extending outwardly
from the lower part of the fire box at about a foot above the fire bars f.
The upper ends of the said tubes are connected to another tube plate g, in the upper
part of the boiler, and water tubes may also pass radially through the fire box to
further assist in heating the water, i is the fire hole or door and the damper fitted to
[Price 6d 1

page_text: the upper end of the uptake 1. The heated gases from the fire box pass upwardly
through the tubes d into the space above the tube plate g and in so passing assist to
heat the water contained in the space between the fire box and outer shell. In case
more than one row of vertical fire tubes is used the tube plate e should be increased in
width so as to permit of such tubes being fixed thereto.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what I
claim is
In vertical multitubular boilers the use of one or more rows of fire tubes such as d
passing through the water space between the fire box and the the outer shell of the boiler
and connected at their lower ends to a tube plate fixed to the lower part of the fire box,
and at their upper ends to a tube plate in the upper part of the boiler substantially in
the manner and for the purpose herein set forth and shewn in the accompanying sheet
of drawings.
Dated this 30th day of September 1890.
RAYNER & CASSELL,
37, Chancery Lane, London, W.C., Agents for the Applicant.