Improvements in and relating to Steam Boilers.
Year: 1893

page_text: Date of Application, 27th June, 1893
Complete Specification Left, 24th Mar., 1894-Accepted, 5th May, 1894.
PROVISIONAL SPECIFICATION.
Improvements in and relating to Steam Boilers.
I, WILLIAM CHALMERS of 8 Finnieston Street, Glasgow Lanarkshire,
Boilermaker, do hereby declare the nature of my invention to be as follows:-
This invention has reference to and comprises Improvements in and relating
to Steam Boilers and especially those of the " Haystack" vertical class, and
whereby a better heating, circulating and steam raising effect with less emission of
smoke will be obtained than hitherto.
"
on
As applied to a haystack boiler, the improvements consist in fitting a circular
brick or other vertical wall in the combustion chamber of boiler below and in
line with the uptake smoke flue, and extending from the line of the lower to
the upper tube plates. This wall would have a cover brick or coping
top to prevent any escape of gases between it and the shell of uptake flue, and
would be formed with a series of arches at its lower end for the passage of the
gaseous products of combustion. A corresponding brick or other wall which may
be either solid or hollow, would be fitted annularly round this inner wall within the
combustion chamber, and would extend from the lower tube plate up to near the
upper tube plate, and thus leave a vertical flame space between the two walls.
The gaseous products of combustion would thus pass up on the outer surface
of the outer wall, and then over the top of this and down the annular space between
the two walls and then pass away through the open arch space at bottom of inner
wall to the uptake exit flue. Instead of the outer wall being made of brickwork it
would alternatively and preferably be made as a hollow metal annular chamber to
form a water circulating jacket. This would be effected by rivetting at their
lower flanged ends two annular rings of vertical plates to the lower tube plate,
preferably stayed by transverse rods at suitable distances apart. These ring
plates would extend up to near the upper tube plate, and be connected closely at
top by a metal ring preferably of channel or dome shape extending between and
rivetted at its lower ends to the top of the two vertical plates. The circulating
water would enter the lower part of this jacket ring chamber from the lower water
space of boiler, and the steam would pass to the upper steam space of boiler through
a series of open ended tubes secured between the top ring plate of chamber and the
upper tube plate of furnace and form stays to these. With this arrangement the
gaseous products of combustion would pass as previously described, over the top of
jacket chamber and down between it and the inner wall, and thence escape to the
uptake flue.
Dated 26th June 1802
W. R. M. THOMSON & Co.,
96, Buchanan Street, Glasgow, Agents.
COMPLETE SPECIFICATION.
Improvements in and relating to Steam Boilers.
I, WILLIAM CHALMERS, of 8 Finnieston Street, Glasgow, Lanarkshire,
Boilermaker, do hereby declare the nature of my invention, and in what manner the
same is to be performed to be particularly described and ascertained in and by the
following statement in writing, that is to say :-
This invention has reference to and comprises Improvements in and relating to
Steam Boilers and especially those of the "Haystack" vertical class, and whereby a

page_text: better heating, circulating, and steam raising effect with less emission of smoke will
be obtained than hitherto.
And in order that my said invention and the manner of performing or carrying
the same into effect or practice may be properly understood I have hereunto
appended an explanatory sheet of drawings in which Figure 1 is an elevation
half in section, and Figure 2 a horizontal section of a Haystack "boiler as
constructed in accordance with my improvements.
68
Referring to these drawings:-The improvements consist in fitting a circular
brick or other vertical wall a, in the combustion chamber of boiler below and in line
with the uptake smoke flue A, and extending from the line of the lower to the
upper tube plates B, B'. This wall a would have a cover brick or coping" a¹ on
top to prevent any escape of gases between it and the shell A of uptake flue, and
would be formed with a series of arches a' at its lower end for the passage of the
gaseous products of combustion. A corresponding brick or other wall b which may
be either solid or hollow would be fitted annularly round this inner wall a within
the combustion chamber, and would extend from the lower tube plate B up to near
the upper tube plate B', and thus leave a vertical flame space C between the two
walls a b. The gaseous products of combustion would thus pass up on the outer
surface of the outer wall band then over the top of this and down the annular
space C between the two walls a, b, and then pass away through the open arch
space a at bottom of inner wall a to the uptake exit flue A¹, A. Instead of the
outer wall being made of brickwork it would alternatively and preferably be made
a hollow metal annular chamber to form a water circulating jacket. This would
be effected, as shown in the drawings, by rivetting at their lower flanged ends two
annular rings b 6 of vertical plates to the lower tube plate B, preferably stayed by
transverse rods b' at suitable distances apart. These ring plates b would extend up
to near the upper tube plate B', and be connected closely at top by a metal ring b
preferably of channel or dome shape extending between and rivetted at its lower
edges to the top of the two vertical plates b b. The circulating water would enter the
lower part of this jacket ring chamber from the lower water space B2 of boiler,
and the steam would pass to the upper steam space D of boiler through a series of
open ended tubes c secured between the top ring plate 63 of chamber and the upper
tube plate B' of the furnace and form stays to these. With this arrangement the
gaseous products of combustion would pass as previously described, over the top b
of jacket chamber b and down between it and the inner wall a and thence escape
through the arches or openings a to the uptake flue A¹ A.
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 :-
First. In steam boilers the fitting of an inner brick or other vertical wall in the
combustion chamber in combination with an outer annular wall so as to form a
passage or space for the products of combustion to pass to lower part of uptake flue,
substantially as herein described in reference to and by way of application shown in
the accompanying drawings.
Second. In steam boilers, the combination of an inner wall and an outer hollow
wall formed of metal plates for the water to circulate in the combustion chamber,
substantially as herein described in reference to and shown in the accompanying
drawings.
Third. In steam boilers, the combination of parts used in constructing inner and
outer walls in the combustion chamber substantially as herein described in reference
to and shown in the accompanying drawings.
"
Dated the 09-
1 1001
W. R. M. THOMSON & Co.,
96, Buchanan Street, Glasgow, Agents.