IMPROVE. MENTS IN STEAM BOILERS AND FURNACES
Year: 1863

page_text: LETTERS PATENT to Richard Archibald Brooman, of 166, Fleet Street,
in the City of London, Patent Agent, for the Invention of "IMPROVE.
MENTS IN STEAM BOILERS AND FURNACES."--A communication from abroad
by Johann Christian Carsten Meyn, of Rendsburg, in the Duchy of
Holstein
Sealed the 5th April 1864, and dated the 6th October 1863.
PROVISIONAL SPECIFICATION left by the said Richard Archibald
Brooman at the Office of the Commissioners of Patents, with his
Petition, on the 6th October 1863.
I, RICHARD ARCHIBALD BROOMAN, of 166, Fleet Street, in the City of
London, Patent Agent, do hereby declare the nature of the said Invention
for "IMPROVEMENTS IN STEAM BOILERS AND FURNACES," to be as follows:-
This Invention in boilers relates to vertical steam boilers, and consists in
arranging a number of flat tubes, indented or not on their sides, in a circle
above the back part of the fireplace, and in other arrangements hereafter
described. The furnace extends somewhat in front of the boiler and has an
arch of fire-resisting material over it; channels are formed in the arch to
admit atmospheric air and conduct it over the burning fuel and into the fore
part of the furnace. Above and concentric with the flat tubes is a series of
tuoes, and above them is a steam chest forming the upper part of the boiler
Price 8d.1

page_text: and surrounded by a casing; between the steam chestand the casing there is
a superheater consisting of a coil of pipes carried round the steam chest. 'The
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Richard Archibald Brooman in the Great Seal Patent Office
on the 6th April 1864.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, RICHARD
ARCHIBALD BROOMAN, of 166, Fleet Street, in the City of London, Patent
Agent, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Sixth day of October, in the year of our Lord
One thousand eight hundred and sixty-three, in the twenty-seventh year
of Her reign, did, for Herself, Her heirs and successors, give and grant
unto me, the said Richard Archibald Brooman, Her special licence that I, the
said Richard Archibald Brooman, my executors, administrators, and assigns,
or such others as I, the said Richard Archibald Brooman, my executors,
administrators, and assigns, should at any time agree with, and no others,
from time to time and at all times thereafter during the term therein
expressed, should and lawfully might make, use, exercise, and vend, within
the United Kingdom of Great Britain and Ireland, the Channel Islands,
and Isle of Man, an Invention for "IMPROVEMENTS IN STEAM BOILERS AND
FURNACES," (communicated to me from abroad by Johann Christian Carsten
Meyn,of Rendsburg, in the Duchy of Holstein,)upon the condition (amongst
others) that I, the said Richard Archibald Brooman,myexecutors or adminis-
trators, by an instrument in writing under my, or their, or one of theirhands
and seals, should particularly describe and ascertain the nature of the said
Invention, and in what manner the same was to be performed, and cause
the same to be filed in the Great Seal Patent Office within six calender
months next and immediately after the date of the said Letters Patent.
NOW KNOW YE, that I, the said Richard Archibald Brooman, do hereby
declare the nature of the said Invention, and in what manner the same
is to be performed, to be particularly described and ascertained in and by
the followingstatement thereof, reference being had to the Drawings hereunto
annexed, that is to say:-
This Invention in boilers relates to vertical steam boilers, and consists in
arranging a number of flat tubes, indented or not on their sides, in a circle

page_text: above the back part of the fire-place, and in other arrangements hereafter
described. The furnace extends somewhat in front of the boiler and has an
arch of fire-resisting material over it; channels are formed in the arch to
admit atmospheric air and conduct it over the burning fuel and into the fore
part of the furnace. Above and concentric with the flat tubes is a series of
tubes, and above them is a steam chest forming the upper part of the boiler
and surrounded by a casing; between the steam chest and the casing there is
asuperheater consisting of a coil of pipes carried round the steam chest. The
Hat tubes may be of a tapered form in their cross section.
Figure 1 of the accompanying Drawings is a transverse vertical section of
a steam boiler and furnace constructed according to this Invention; Figures
2, 3, and 4, are sections through the lines a, b, c, d, and e, f, respectively of
Figure 1. The furnace extends in front of the boiler, as shewn, and has over
it an arch A of fire-resisting material; this arch has channels a, a, formed in
it to admit atmospheric air and conduct it over the burning fuel and into the
fore part of the furnace; the admission of air by these channels is regulated
by shutters B; C, C¹, are the furnace bars; the draught to the back part C¹
of the furnace may be regulated, if required, by a shutter D in the ash-pit;
E is the door of the furnace. The products of combustion pass through the
space F, surround vertical tubes G, impinge against a plate H, and enter a
flue or chamber I, from the flue I they pass up inside other vertical tubes J
concentric with the tubes G and into a jacket Ksurrounding a steam chest L,
and are finally carried off by the chimney or uptake M. The water is con-
tained in the spaces N and O, the tubes G, an external water space P, and
in the space surrounding the tubes Jup to about the point indicated; all these
water spaces are in immediate contact with the products of combustion. The
steam passes through the steam chest Linto a coil of pipes Q carried round
the steam chest and becomes superheated therein on its way to the engine;
the upper end of the coil Q may be fitted with a safety valve. R, K, are
doors through which the flues and tubes may be inspected and cleaned, and
S, S, are man-holes. The tubes G are by preference of tapered form in their
cross section, as shewn in Figure 2; they are indented on their sides as
represented inlongitudinal section in Figure 5, and in cross section in Figure 6.
Instead of being tapered, as seen in Figure 2, the sides of these tubes may be
parallel, as represented in cross section in Figure 7.
Boilers constructed according to this Invention occupy comparatively little
space; they are simple in construction, and durable, and will work with safety
under high pressure; they also possess the advantage that the calcareous
matter deposited by the water becomes detached from the indented flat tubes

page_text: as soon as it is of about the thickness of an egg shell,and falls to the bottom
of the boiler, from which it may be easily removed. As all parts of the boiler
are readily accessible for cleaning and repair any damaged pipe may be
removed and replaced by another with little trouble. The stays generally
made use of in boilers are dispensed with.
And having now described the nature of the said Invention, and in what
mauner the same is to be performed, I declare that I claim,-
First, arranging and combining the parts of steam boilers, substantially as
herein-before described and illustrated in the accompanying Drawings.
Second, constructing and arranging the furnaces of steam boilers, sub-
stantially as herein-before described and illustrated in the accompanying
Drawings.
Third, forming flat tubes with indentations on their sides, in manner herein-
before described and illustrated in the accompanying Drawings.
In witness whereof, I, the said Richard Archibald Brooman, have
hereunto set my hand and seal, this Sixth day of April, One thousand
eight hundred and sixty-four.
R. A. BROOMAN. (L.S.)