IMPROVEMENTS IN AND APPLI- CABLE TO STEAM BOILER FURNACES
Year: 1879

page_text: LETTERS PATENT to George Brown Brock, of Bryn Syfi, Swansea, in the
County of Glamorgan, for the Invention of "IMPROVEMENTS IN AND APPLI-
CABLE TO STEAM BOILER FURNACES."
Sealed the 30th April 1880, and dated the 2nd December 1879.
PROVISIONAL SPECIFICATION left by the said George Brown Brock at
the Office of the Commissioners of Patents on the 2nd December 1879.
GEORGE BROWN BROCK, of Bryn Syfi, Swansea, in the County of Glamorgan.
"IMPROVEMENTS IN AND APPLICABLE TO STEAM BOILER FURNACES."
The object of my Invention is to introduce steam, in the manner herein described,
into the fire box of locomotive or other steam boilers for the purposes of increasing
the combustion of the fuel employed, using the steam itself for increased heating
power, reducing the consumption of fuel, or enabling inferior kinds of fuel to be
substituted for superior kinds, and causing a current of steam over the fire to
mingle with and facilitate the combustion of the smoke which would otherwise
pass out through the chimney.
My Invention consists in leading the steam by means of a pipe or pipes from the
top or other suitable part of the boiler into the fire box, either through one or more
of the stays connecting the boiler shell and fire box (in which case the said stays
would be bored for the purpose, and would constitute the mouths or nozzles of the
pipes), or by carrying the pipe or pipes through between the stays into the fire
box, the pipe or pipes at the top of the boiler being provided with a cock or cocks
so placed and arranged as to be under the complete control of the engineer or
attendant, who can regulate the quantity of steam admitted to the fire box as he
may deem requisite for the better working of the boiler.
My Invention is applicable to various kinds of steam boilers, but more especially
to those in use for railway purposes.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said George Brown Brock in the Great Seal Patent Office on the 2nd
June 1880.
GEORGE BROWN BROCK, of Bryn Syfi, Swansea, in the County of Glamorgan.
"IMPROVEMENTS IN AND APPLICABLE TO STEAM BOILER FURNACES."
The object of my Invention is to introduce steam, in the manner herein described,
into the fire box of locomotive or other steam boilers for the purposes of increasing
the combustion of the fuel employed, using the steam itself for increased heating
power, reducing the consumption of fuel, or enabling inferior kinds of fuel to be
substituted for superior kinds, and causing a current of steam over the fire, which
being decomposed by the heat mingles with and facilitates the combustion of the
smoke, which would otherwise pass out through the chimney.
My Invention consists in leading the steam by means of a pipe or pipes from the
top or other suitable part of the boiler into the fire box, either through one or more
of the stays connecting the boiler shell and fire box (in which case the said stays
would be bored for the purpose, and would constitute the mouths or nozzles of the
pipes), or by carrying the pipe or pipes through between the stays into the fire
box, the pipe or pipes at the top of the boiler being provided with a cock or cocks
so placed and arranged as to be under the complete control of the engineer or
attendant, who can regulate the quantity of steam admitted to the fire box as he
may deem requisite for the better working of the boiler.
My Invention is applicable to various kinds of steam boilers, but more especially
to those in use for railway purposes.
And in order that the said Invention may be fully understood, I will now
proceed to describe the same by the aid of the accompanying Sheet of Drawings,
which illustrate some of the methods of applying it to a locomotive boiler.
Figure shows a sectional elevation of the boiler through the line C, D. The
cock a being opened, the steam from the top of the boiler passes through the
two pipes b, b, and stays c, c, into the fire box d, as shown in Figure 3, the said
pipes being connected to the stays in the manner shown in the Drawing, or in any
other suitable manner, and a small hole (preferably not exceeding a quarter of an
inch in diameter), being bored through each of the stays for the steam to pass
through, thus leaving no part of the apparatus liable to destruction by the
radiation of heat from the fire.
Figure 2 also shows a sectional elevation of the boiler through the line C, D, but
illustrates a method leading the steam from the top of the boiler through one
pipe e, which may have a branch or branches, if necessary, as shown at fin
Figure 4, so that the steam may be admitted into the fire box through one or more
of the stays as desired.
Figure 3 shows a longitudinal section of the boiler through the line A, B. dis
the fire box; c is one of the stays, having a small hole bored through it, as before
described, and to which the pipe e is connected in the manner shown, or in any
other suitable manner; a is the cock for regulating the admission of the steam into
the fire box. This cock inay be placed at any convenient point upon the top of
the boiler, and may be fitted with suitable levers and rods, if necessary, as shown
in Figure 2, or other suitable contrivance, in order that the admission of the steam
to the fire box may be easily regulated and controlled by the attendant, it being
necessary for the effectual working of the Invention that no more steam should be
admitted than can be decomposed by the heat in the furnace. g and are the
bridges of the furnace.
The steam enters the fire box through one or more of the stays c, as shown
(preferably just below the bridge 9), and being decomposed by the heat mingles

page_text: with the smoke, as hereinbefore described, thereby increasing the combustion in the
furnace, and reducing the consumption of fuel.
If it is preferred, the pipe or pipes for admitting the steam to the fire box may
be led through between the stays, that part of the pipe passing through the boiler
shell and fire box being made in the form of a stay, so that it cannot be destroyed
by the radiation of heat from the fire. Or an extra stay may be inserted for the
purpose between the existing stays of the fire box. I find that the greatest effect
is obtained when the steam is admitted immediately below the bridge g in
such a direction that it shall pass under the bridge g towards the underside
of the bridge h. For this purpose it may be found necessary to insert a stay
or stays of larger size, and to bore a hole or holes through it or them diagonally,
as shown by Figure 5, in order to give the required direction to the current or
currents of steam. Also when steam is admitted through two or more stays the
currents of steam may be directed so as to cross each other.
And now having fully described and ascertained the nature and object of my
Invention, and in what manner the same may be carried into practical effect, I
wish it to be understood that I do not lay claim to the principle of admitting
steam into the fire box in order to increase the combustion and reduce the con-
sumption of fuel therein, and that I do not restrict myself to the precise details
herein described and illustrated, which may be varied without departing from the
leading features of my Invention, but what I claim as my Invention, and desire to
have secured to me by the before-mentioned Letters Patent is,―
Firstly. The method of admitting steam into the fire box of locomotive or other
steam boilers through the existing stays or through extra stays inserted for that
purpose, or through pipes made in the form of stays, substantially as hereinbefore
described.
Secondly. The combination and arrangement of parts, substantially as herein-
before described, for the purpose of admitting steam into the fire box of locomotive
or other steam boilers.
In witness whereof, I, the said George Brown Brock, have hereunto set my
hand and seal, this Twenty ninth day of May, in the year of our Lord
One thousand eight hundred and eighty.
Witness,
DAVID YOUNG,
23, Southampton Buildings,
London, W. C.
G. B. BROCK. (L.S.)