IMPROVEMENTS IN STEAM GENERATORS
Year: 1867

page_text: LETTERS PATENT to Clinton Edgcumbe Brooman, of the Firm of Robert-
son, Brooman, and Company, of 166, Fleet Street, in the City of London,
Patent Agents, for the Invention of "IMPROVEMENTS IN STEAM GENERATORS,"
-A communication from abroad by Pierre Joseph Guyet, of Paris,
France.
Sealed the 8th May 1868, and dated the 23rd November 1867.
PROVISIONAL SPECIFICATION left by the said Clinton Edgcumbe
Brooman at the Office of the Commissioners of Patents, with his Petition,
on the 23rd November 1867.
I, CLINTON EDGCUMBг. BROOMAN, of the Firm of Robertson, Brooman, and
Company, of 166, Fleet Street, in the City of London, Patent Agents, do
hereby declare the nature of the said Invention for "IMPROVEMENTS IN STEAM
GENERATORS," to be as follows:-
The objects of this Invention are to increase the heating surface and the
evaporating power of the fuel in tubular steam generators, and the improve-
ments consist, first, in a tubular partition which I fit between the grate bars
and the top of the fire-place, and secondly, in an independent tubular apparatus
which I fit in the fire-box above the tubular partition to serve as required
either as a heater of the feed water or as a superheater of the steam produced
by the generator.

page_text: In carrying out this Invention the first compartment or fire-place proper is
terminated at its upper part by a plate pierced with holes to receive the lower
ends of tubes, which may be of iron, copper, or steel, and rivetted with rings upon
the plate. This plate forms the base of the tubular partition, which is termi-
nated at its upper part by another plate pierced with like holes to receive the
upper end of the tubes. The two plates are united by strong stays. Above the
partition is a second compartment of the fire-place, the side of which has a
plate fitted with horizontal tubes, the other ends of which open into the smoke
box surmounted with the chimney. The second compartment is in the form
of a truncated cone terminated at the top by a flanged cylindrical part
meeting it by bends and counter bends. The fire-place, the tubular partition,
the second compartment, and the horizontal tubes are surrounded with water
circulating in the space limited by the vertical and horizontal casing of the
generator. The products of combustion are compelled to traverse the tubes
of the partition to enter the second compartment, which they heat before
entering the horizontal tubes to finally reach the chimney. This arrangement
of boiler with tubular partition constitutes the first part of this Invention; it
may be employed alone or combined with the independent tubular apparatus
which constitutes the second part. This tubular apparatus may be employed
as a feed water heater or as a superheater, and is placed in the second com-
partment of the fire-place. On the flange of the cylindrical part is bolted a
metallic barrel or box closed by a cover, and divided into two compartments
by a vertical partition; its base receives the upper end of tubes, the lower
ends of which are rivetted to the upper side of another barrel or box closed
at the bottom. The two barrels are connected by bars or rods, which unite
them firmly independently of the tubes: the upper barrel is provided with
two pipes in communication respectively with its two compartments.
In using this apparatus as a feed water heater it acts as follows:-The
water from the feed apparatus enters one compartment of the upper barrel
by one pipe, descends by the tubes leading from that compartment to the
lower barrel, and then ascends by the other tubes leading to the upper com-
partment, and then passes by the other pipe into the generator, being led to
the lower part thereof by a tube. When this apparatus is employed to
superheat the steam the action is the reverse of that before described; the
tube last mentioned is dispensed with, and the communications of the pipes
are modified; that which was the supply pipe from the feed apparatus com-
municates with the steam supply pipe, and the other pipe communicates
The steam enters this pipe,
directly with the dome or top of the generator.
passes in the reverse direction to that described for the feed water, and is

page_text: SPECIFICATION
in pursuance of the conditions of the Letters Patent, filed
by the said Clinton Edgcumbe Brooman in the Great Seal Patent Office
on the 22nd May 1868.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, CLINTON
EDGCUMBE BROOMAN, of the Firm of Robertson, Brooman, and Company, of
166, Fleet Street, in the City of London, Patent Agents, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twenty-third day of November, in the year of our Lord
One thousand eight hundred and sixty-seven, in the thirty-first year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me, the
said Clinton Edgcumbe Brooman, Her special licence that I, the said
Clinton Edgcumbe Brooman, my executors, administrators, and assigns,
or such others as I, the said Clinton Edgcumbe 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 GENERATORS"
(communicated to me from abroad by Pierre Joseph Guyet, of Paris, France.)
upon the condition (amongst others) that I, the said Clinton Edgcumbe
Brooman, my executors or administrators, by an instrument in writing under
my, or their, or one of their hands 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 calendar months next and immediately after
the date of the said Letters Patent.
NOW KNOW YE, that I, the said Clinton Edgcumbe 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
following statement thereof, reference being had to the Drawings hereunto
annexed, that is to say:-
The objects of this Invention are to increase the heating surface and the
evaporating power of the fuel in tubular steam generators, and the improve-
ments consist, first, in a tubular partition which I fit between the grate bars

page_text: and the top of the fire-place; and secondly, in an independent tubular appa-
ratus which I fit in the fire-box above the tubular partition to serve as
required either as a heater of the feed water or as a superheater of the steam
produced by the generator.
Figure 1 of the accompanying Drawings is a longitudinal vertical section,
and Figure 2 a plan, partly in section, of a steam generator with these
improvements applied thereto.
d is the door through which the fuel is fed. The first compartment or fire-
place proper c is terminated at its upper part by a plate e pierced with holes
to receive the lower ends of tubes k, which may be of iron, copper, or steel,
and rivetted with rings upon the plate. This plate e forms the base of the
tubular partition, which is terminated at its upper part by another plate g
pierced with like holes to receive the upper ends of the tubes k. The two
plates e and g may be united by strong stays. Above the partition is a second
compartment of the fire-place, the side of which at m has a plate n fitted
with horizontal tubes o, the other ends of which open into the smoke box s,
surmounted with the chimney t. The second compartment f is in the form of
a truncated cone terminated at the top by a flanged cylindrical part ŕ meeting
it by bends and counter bends r'. The fire-place c, the tubular partition k,
the second compartment f, and the horizontal tubes o are surrounded with
water circulating in the space limited by the vertical and horizontal casing A
of the generator. The products of combustion are compelled to traverse the
tubes of the partition to enter the second compartment f, which they heat
before entering the horizontal tubes o to finally reach the chimney. This
arrangement of boiler with tubular partition constitutes the first part of this
Invention; it may be employed alone or combined with the independent
tubular apparatus which constitutes the second part. This tubular apparatus
may be employed as a feed water heater or as a superheater, and is placed in
the second compartment f of the fire-place. On the flange r is bolted a
metallic barrel or box H closed by a cover I, and divided into two compart-
ments K, L, by a vertical partition J; its base M receives the upper ends of
tubes N, N¹, the lower ends O, O', of which are rivetted to the upper side of
another barrel or box Q closed at the bottom R. The two barrels H and Q
are connected by bars or rods S, S', which unite them firmly independently of
the tubes N, N¹, 0, 0¹; the upper barrel H is provided with two pipes T, U,
in communication respectively with its two compartments.
In using this apparatus as a feed water heater it acts as follows:-The
water from the feed apparatus enters the compartment K of the upper barrel
by the pipe T, descends by the tubes N, O, to the lower barrel Q, and then

page_text: ascends by the tubes N¹, O'. leading to the compartment L of the barrel H,
and then passes by the pipe U into the generator, being led to the lower part
thereof by a tube V. The heating apparatus being always full of water, and
the quantity of water discharged into it being small, the speed communicated
to the mass is very slow, and this mass being much divided by the circulating
tubes N, N, O, O', which offer a very large exposed surface to the intensity
of the flame, it follows that the heating is rapid and great, and the feed water
is introduced into the generator at the same temperature as the water therein.
When this apparatus is employed to superheat the steam the action is the
reverse of that before described, the tube V is dispensed with, and the com-
munications of the pipes T, U, are modified; the pipe T communicates with
the steam supply pipe, and the pipe communicates directly with the dome
or top of the generator. The steam enters this pipe U, passes into the com-
partment L, descends by the tubes N1, 0¹, to the barrel Q. rises by the
tubes N, O, to the compartment K, from which it is led by the pipe T. Any
water drawn by the steam falls into the lower barrel Q and becomes quickly
vaporized. The volume of steam which traverses the tubes being small in
relation to the surface of the tubes, and the volume being much divided, it
follows that the steam becomes greatly superheated.
And having now described the nature of the said Invention, and in what
manner the same is to be performed, I declare that I claim as improvements
in steam generators,―
First. The construction of a tubular partition according to the first part of
the said Invention, substantially as herein-before described and represented in
the accompanying Drawings.
Second. The construction of a tubular feed water heater or steam
superheater according to the second part of the said Invention, substantially
as herein-before described and represented in the accompanying Drawings.
In witness whereof, I, the said Clinton Edgcumbe Brooman, have here-
unto set my hand and seal, this Twenty-second day of May, One
thousand eight hundred and sixty-eight.
C. E. BROOMAN. (L.S.)