Improvements in Steam Boilers.
Year: 1892

page_text: Date of Application, 1st Feb., 1892
Complete Specification Left, 1st Nov., 1892-Accepted, 3rd Dec., 1892
PROVISIONAL SPECIFICATION.
Improvements in Steam Boilers.
We, WILLIAM DONALD and JAMES DONALD Junior, both of the firm of
Hanna, Donald & Wilson, Engineers, Paisley, Renfrewshire, do hereby declare the
nature of this invention to be as follows:-
This invention which relates to steam boilers of the water tube type as adapted
for marine purposes has for its object to provide for more convenient access to the
tubes, and other parts for cleaning and repair.
The improved boiler is composed of a cylindrical steam and water drum or dome
and a mud or sludge box situated below the drum the two being connected by a
series of water tubes expanded at their upper ends into the steam drum and at
their lower ends into the sides of the mud drum or box. The tubes on-each side
are so bent or curved as to enclose an approximately cylindrical space wherein the
furnace is situated and they are staggered or arranged so as to partially overlap
in the direction in which the fire gases rise through between the tubes so as to
obstruct the free passage of the heated gases, whilst as viewed from each side
spaces are left between the rows of tubes to facilitate brushing or cleaning. The
mud box is made with a removable cover to provide access for expanding the ends
of the tubes and for cleaning and in small boilers the steam drum may also be
jointed or made with a removable covering for like purposes. The tubes may be
each fitted with an inner tube or with a longitudinal diaphragm to facilitate circu-
lation of the water through them. The entire boiler is enclosed in a metallic
casing provided-with-suitable-doors-and-suitably coated to prevent radiation of heat
from the fire gases which rising through the rows of tubes are confined by the
casing and caused to impinge upon the drum in their passage to the chimney which
is situated overhead.
Dated this Thirtieth day of January 1892.
CRUIKSHANK & FAIRWEATHER,
62, St. Vincent Street, Glasgow, Agents.
COMPLETE SPECIFICATION.
Improvements in Steam Boilers.
We, WILLIAM DONALD and JAMES DONALD Junior both of the firm of
Hanna Donald & Wilson Engineers, Paisley, Renfrewshire, 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 which relates to steam boilers of the water tube type as adapted
for marine purposes has for its object to provide for more convenient access to the
tubes and other parts for cleaning and repair.
As represented in the accompanying drawings in vertical section and end and
side elevations respectively at Figures 1, 2 and 3, in similar views of a modified
form in Figures 4, 5 and 6 and in vertical section of further modifications at
Figures 7, 8 and 9 the improved boiler is composed of a cylindrical steam and
water drum or dome A and a mud or sludge box B situated below the drum A the
two being connected by a series of water tubes C C expanded at their upper
ends c into the steam drum A and at their lower ends c¹ into the sides of the mud
drum or box B. The tubes on each side are so bent or curved as to enclose an
approximately cylindrical space D wherein in the modifications shewn at Figures 1,
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page_text: 2, 3, 7, 8 and 9 the furnace F is situated ; but the furnace or furnaces F may be
placed under the water tubes and fired on each side of the mud drum as shewn at
Figures 4, 5 and 6. The tubes C are staggered or arranged so as to partially
overlap in the direction in which the fire gases rise through between the tubes so
as to obstruct the free passage of the heated gases whilst as viewed from each side
spaces are left between the rows of tubes to facilitate brushing or cleaning, see
Figures 3 and 6. The mud box B is made with a removable cover B' to provide
access for expanding the ends of the tubes and for cleaning, and in small boilers
the steam drum may also be jointed as shewn or made with a removable covering for
like purposes. The tubes may be each fitted with an inner tube or with a
longitudinal diaphragm as indicated by dotted lines to facilitate circulation of the
water through them. The entire boiler is enclosed in a metallic casing G provided
with suitable doors and suitably coated to prevent radiation of heat from the fire
gases which rising through the rows of tubes are confined by the casing and
caused to impinge upon the drum in their passage to the chimney H which is
situated overhead.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is :-
A water tube steam boiler the parts of which are constructed arranged and
combined substantially as hereinbefore described with reference to the annexed
drawings.
Dated this Thirty-first day of October 1892.
CRUIKSHANK & FAIRWEATHER,
62, St. Vincent Street, Glasgow, Agents.