Improvements in Water-tube Boilers.
Year: 1894

page_text: Date of Application, 28th Apr., 1894
Complete Specification Left, 28th Jan., 1895-Accepted, 16th Mar., 1895
PROVISIONAL SPECIFICATION.
Improvements in Water-tube Boilers.
I, Sir CHARLES HENRY AUGUSTUS FREDERICK LOCKHART Ross, Baronet,
Balnagowan Castle, Ross-shire, N.B., Lieut. 3rd Bn. Seaforth Highlanders, do
hereby declare the nature of this invention to be as follows:-
This invention relates to that class of water-tube boilers which has recently
been adopted for torpedo and other boats, in which, while a high rate of speed is
desired, there is but a small amount of boiler space available.
In this class of boiler, which may be said to consist, generally, of three
cylinders arranged in a triangle, and connected together by tubes, the diameter of
the cylinders is comparatively so small as to render it difficult to insert the tubes,
or to replace a damaged tube, without sending the boat to dock, and the object of
this invention is to simplify the construction of these boilers, whereby these
difficulties will be overcome.
.
.
In carrying out this invention, I remove from each cylinder, at the part where
the tubes would enter, a segment, and I cover each space so formed by a segmental
plate, in which the tubes have been previously inserted, which plates 1 bolt or
otherwise firmly secure to the cylinders. In this way, should a tube become
damaged, it will only be necessary to unbolt the plates corresponding to the
particular nest of tubes, draw the nest away, renew the tube, and replace the nest
in position, and bolt the plates again to the cylinders.
Dated this 28th day of April 1894.
NEWTON & SON,
Agents for the Applicant.
I Sir CHARLES HENRY AUGUSTUS FREDERICK LOCKHART Ross, Baronet,
Balnagowan Castle, Ross-shire, N.B. Lieut. 3rd Bn. Seaforth Highlanders, do
bereby 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 that class of water tube boilers which has recently
been adopted for torpedo and other boats, which, though they require to be driven
at a high rate of speed, have but a small amount of boiler space available.
In this class of boiler, which may be said to consist, generally, of three
cylinders arranged in a triangle, and connected together by tubes, the diameter of
the cylinders is comparatively so small as to render it difficult to insert the tubes,
or to replace a damaged tube without sending the boat to dock, and the object of
this invention is to simplify the construction of these boilers, whereby these
difficulties will be overcome.
In carrying out this invention. I remove from the top cylinder or drum, at the
point where the tubes would enter, a segment or segments, which I cover with a
plate or plates, to which the tubes are secured in any convenient manner.
These

page_text: plates are secured to the drum by bolts and nuts, so that they may be removed and
replaced when required.
The two bottom cylinders or drums I prefer shall be of comparatively small
diameter, and shall consist of short lengths of flanged tube bolted together end to
end, and into which the nests of tubes are secured in any convenient manner.
These drums will be placed practically below the level of the fire-place, and
they will not be connected with the main drum except by the water tubes.
In the accompanying drawing I have shown my invention in side elevation at
Fig. 1, and in cross section at Fig: 2.
A is the main drum, which includes also the steam space, and B is a steam dome
provided with steam and safety valves C. D. From the lower part of the main
drum, and below the water level, portions are removed which are covered by
plates E carrying the water tubes G. These water tubes connect with the lower
drums H H', composed of flanged tubes, as shown, or they may have portions
removed, and covered by plates, as in the main drum.
J is the fire grate, and K is a casing which encloses the boiler.
When a tube is damaged, it is only necessary to unbolt the plate E containing
the particular nest of tubes, and the corresponding length of the drum H or H',
remove them, put in a new tube, replace the plates &c., in position, and secure the
bolts.
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 :-
1. Arranging the water tubes in nests or series connected with corresponding
removable portions of the drums or cylinders, as and for the purpose set forth.
2. Drums or cylinders for water tube boilers having removable portions with
which the water tubes are connected, as and for the purpose set forth.
3. A water tube boiler constructed and arranged as herein shewn and described,
and for the purpose set forth.
Dated this 26th day of January 1895.
NEWTON & SON,
Agents for the Applicant.