Improvements in Steam Generators or Sectional Water Tube Boilers.
Year: 1896

page_text: Date of Application, 26th May, 1896
Complete Specification Left, 26th Feb., 1897-Accepted, 8th May, 1897
PROVISIONAL SPECIFICATION.
Improvements in Steam Generators or Sectional Water Tube
Boilers.
I, HUGH MCINTYRE, of 7, Walworth Terrace, in the County of the City of
Glasgow, North Britain, Consulting Engineer, do hereby declare the nature of this
invention to be as follows:-
This invention relates to improvements in steam generators or sectional water
tube boilers and is specially adapted for marine use and has for its object to enable
the tubes to be examined and repaired even when under steam and also to lessen
the risk of a steamer being disabled by the bursting of any tube.
The boiler consists of one large steam and water cylinder and two water
cylinders, the latter being spaced at a suitable distance to allow sufficient furnace
area between the two. The top cylinder is placed over the centre of the two
water cylinders and is supported on a row of large water tubes on each side and at
suitable distances apart to admit of nests or clusters of tubes being placed between
them. There are also some tubes which connect the two water cylinders together
and which also admit of good circulation of the water. The tubes between the
top and bottom cylinders act as down runners for the water and they also act as
supports to carry up the nests or clusters of tubes. These nests or clusters are of
semi-circular or any other convenient shape and are made of any convenient
number of tubes the ends being expanded into a tube plate or otherwise fastened
and a semi-circular or other suitably shaped cover is bolted on each tube plate and
connected to the water cylinder on one end and the steam cylinder on the other by
pipes. These may or may not be fitted with stop valves to allow of any one of the
clusters or neste being disconnected and taken out for repair or examination and
cleaning while under steam. To enable this to be done I have a pipe fitted at
bottom and top, the former to sea discharge or into the bilge, and the latter to
the donkey or other pump to cause a circulation of cold water through the section
and so enable the workmen to handle it. The sections or clusters may vary in
number to suit the power required.
All the sections will be interchangeable and one or more removed or replaced at.
any time. When any cluster of tubes is taken out a plate properly protected is.
put on the opening till the tubes are replaced.
The furnace is of the ordinary type placed under the clusters (which almost.
meet in the centre) and the flame and heated gases pass amongst the tubes up to the
uptake and pass round the top cylinder into the funnel, or the flame and gases may
be led in any other direction that may be found most desirable. Baffle plates will
be fixed in any wide spaces to confine the heat in the tubes. The tubes may be
steel, iron, or any other suitable metal and of any suitable size to suit the
particular work.
D301004
BOTTOMLEY & LIDDLE,
154, St. Vincent Street, Glasgow, Applicant's Agents.

page_text: COMPLETE SPECIFICATION.
Improvements in Steam Generators or Sectional Water Tube
Boilers.
I, HUGH MCINTYRE, of 7, Walworth Terrace, in the County of the City of
Glasgow, North Britain, Consulting 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:-
My invention relates to improvements in steam generators or sectional water.
tube boilers and is specially adapted for marine use and has for its object to enable
the tubes to be examined and repaired even when under steam, and also to lessen
the risk of a steamer being disabled by the bursting of any tube.
In order that my invention may be properly understood and readily carried into
effect I have hereunto appended three sheets of drawings in the several figures of
which corresponding parts are marked with the same letters of reference.
Figure 1 is an end view of a boiler constructed according to my improvements
with uptake fitted round steam cylinder.
Figure 2 is a side view of Figure 1.
Figure 3 is a view of a nest or cluster of tubes removed from boiler.
Figure 4 is an end view of a different type of boiler constructed according to my
improvements and fitted to fire longitudinally, the flames and gases returning
through fire tubes in the upper cylinder.
Figure 5 is a side view of Figure 4.
The boiler consists of one large steam and water cylinder A and two water
cylinders B, B' the latter being spaced at a suitable distance to allow sufficient
furnace area between the two. The top cylinder A is placed over the centre of the
two water cylinders B, B¹ and is supported on a row of large water tubes C on each
side and at suitable distances apart to admit of nests or clusters of tubes D being
placed between them. There are also some tubes E which connect the two water
cylinders B and B together and which also admit of good circulation of the water..
The tubes C between the top and bottom cylinders act as downcomers for the
water and they also act as supports to carry up the nests or clusters of tubes D.
These nests or clusters D are of semi-circular or any other convenient shape and
are made of any convenient number of tubes L, the ends being expanded into a
tube plate or otherwise fastened and a semi-circular or other suitably shaped
cover F is bolted on each tube plate and connected to the water cylinder B on one
end by pipes G and the steam cylinder A on the other by pipes H. These pipes G
and H may or may not be fitted with stop valves I to allow of any one of the
clusters or nests D being disconnected and taken out for repair or examination and
cleaning while under steam. To enable this to be done I have pipes J and J' fitted
at bottom and top, the former J to a sea discharge or into the bilge, and the
latter J to the donkey or other pump to cause a circulation of cold water through
the section and so enable the workmen to handle it. The sections or clusters may
vary in number to suit the power required.
All the sections will be interchangeable and one or more removed or replaced at
any time.
When any cluster of tubes is taken out a plate properly protected is
put on the opening till the tubes are replaced.
The furnace K is of the ordinary type placed under the clusters D, (which almost
meet in the centre) and the flame and heated gases pass amongst the tubes L up to
the uptakes M and pass round the top cylinder A into the funnel N, or the flame
and gases may be led in any other direction that may be found most desirable.
Baffle plates will be fixed in any wide spaces to confine the heat in the tubes. The

page_text: tubes may be steel, iron, or any other suitable metal and of any suitable size to suit.
the particular work.
The boiler shown in Figures 4 and 5 is of a similar type to that already referred:
to and shown in Figures 1, 2, and 3 but in this case the smoke-box is not fitted
round the steam cylinder A, but the flames and hot gases traverse the tubes
longitudinally and pass into a combustion chamber O, when the gases are let into
fire tubes P which gases fill the lower portion of the steam cylinder and passing
through these tubes enter the smoke-box.
As will be observed from Figure 4 the left hand side of the boiler is fitted with.
stop-cocks I to show how the clusters D may be removed while steam is up, while
the right hand side shows no stop-cocks, it being necessary in such case to take off
steam when the boiler is under repair.
It is to be understood that although I have only described and shown two types.
of boilers there are many other modifications of the same without deviating from
the essence of my invention.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
Steam generators or sectional water tube boilers constructed substantially as and:
for the purposes herein before described and illustrated on the accompanying sheets.
of drawing.
BOTTOMLEY & LIDDLE,
154, St. Vincent Street, Glasgow, Applicant's Patent Agents..