IMPROVEMENTS IN FIRE-BARS
Year: 1869

page_text: LETTERS PATENT to Jonathan Thompson Gaze and James Hymas, of
Erith, in the County of Kent, for the Invention of "IMPROVEMENTS IN
FIRE-BARS."
Sealed the 18th March 1870, and dated the 25th September 1869.
PROVISIONAL SPECIFICATION left by the said Jonathan Thompson
Gaze and James Hymas at the Office of the Commissioners of
Patents, with their Petition, on the 25th September 1869.
We, JONATHAN THOMPSON GAZE and JAMES HYMAS, of Erith, in the
County of Kent, do hereby declare the nature of the said Invention for
"IMPROVEMENTS IN FIRE-BAES," to be as follows:-
Our improvements refer to that description of fire-bar used for heating
the feed water before passing into the boiler. We east or arrange these
fire-bars in groups or sections of three (by preference); they are con-
nected at intervals by narrow strips with spaces between for the passage
of air. The middle bar we make tubular with a coupling joint at each
end, whilst the adjoining bars are solid. These groups or sections are
Price 8.1

page_text: arranged on suitable bearing bars in the furnace; the tubular bars are
coupled together by means of elbow tubes, thereby forming a continuous
channel throughout. The feed water is forced into the tubular grate
surface at one end, and passes through the tubular bars before entering
the boiler. There is great economy of fuel from the heating of the feed
water, and the fire-bars being kept cooler than by the ordinary method
do not burn away so rapidly.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Jonathan Thompson Gaze and James Hymas in
the Great Seal Patent Office on the 23rd March 1870.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, JONATHAN
THOMPSON GAZE and JAMES HYMAS, of Erith, in the County of Kent,
send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing data. the Twenty-fifth day of September, in the
year of our Lord One thousand eight hundred and sixty-nine, in the
thirty-third year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto us, the said Jonathan Thompson Gaze and James
Hymas, Her special licence that we, the. said Jonathan Thompson Gaze
and James Hymas, our executors, administrators, and assigns, or such
others as we, the said Jonathan Thompson Gaze and James Hymas, our
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 FIRE-BARS," upon the condition (amongst others) that we, the said
Jonathan Thompson Gaze and James Hymas, our executors or adminis-
trators, by an instrument in writing under our, 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 per-
formed, 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.

page_text: NOW KNOW YE, that we, the said Jonathan Thompson Gaze and
James Hymas, do hereby declare the nature of our 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 (that is to
say):
Our improvements refer to that description of fire-bar used for heating
the feed water before passing into the boiler. We cast or arrange these
fire-bars in groups or sections of three, by preference; they are con-
nected at intervals by narrow strips with spaces between for the passage
of air. The middle bar we make tubular with a coupling joint at each
end, whilst the adjoining bars are solid. These groups or sections are
arranged on suitable bearing bars in the furnace; the tubular bars
are coupled together by means of elbow tubes, thus forming a continuous
channel throughout. The feed water is forced into the tubular grate
surface at one end and passes through the tubular bars before entering
the boiler. There is great economy of Tuel from the heating of the feed
water, and the fire-bars being kept cooler than by the ordinary method
do not burn away so rapidly.
And in order that our said Invention may be properly understood we
shall now proceed to describe the several illustrative Figures upon the
explanatory Sheet of Drawings which we have hereunto appended for
the purpose of shewing certain modifications under which our improve-
ments may be judiciously carried into practice.
The Figures 1, 2, & 3 of the Drawings accompanying this Speci-
fication illustrate one modification of our improvements in fire-bars for
heating the feed water previous to admission to the boiler. Figures 1
and 2 are transverse sections, and Figure 3 sectional plan, shewing the
fire-bars cast in groups or sections of three, connected together by means
of the strips h, h, h, with air spaces i, i, i, between. a, a, a, are the
fire-bars, the central bar a' of each group or section being tubular;
b, b, b, are tubes passing through the bars a', connected alternately by
the elbow tubes c, c, c, so as to form a continuous channel throughout
the entire set of fire-bars in the furnace; d, d', cocks for inlet and outlet
of water, by means of which the heating apparatus may be entirely
shut off in case of derangement. The feed water enters at d, and
traversing the tubes b, b, b, in the direction of the arrows passes into
the boiler through the cock d¹.

page_text: Figures & are transverse sections, and Figure 6 sectional plan,
shewing another modification of our improvements.
In this arrange-
ment the fire-bars are cast separately with the tubes for heating the feed
water arranged in channels underneath, so that the fire-bars may be
removed without disturbing the heating apparatus, or the heating
apparatus may be removed without disturbing the fire-bars. a, a, a, are
the fire-bars; b, b, b, tubular heating surface; d, d', cocks for inlet and
outlet of feed water.
Figure 7 is a transverse section, and Figure 8 a sectional plan of
another modification of our improvements. In this arrangement the
fire-bars are formed in groups or sections of two connected together
by means of the strips h, h, h, with air spaces i, i, i, between.
'The
bars a, a, a, are solid, whilst the bars a', a', a', are tubular. The
tubes b, b, b, pass through the tubular bars a', a', a', and are connected
alternately by the elbow tubes c, c, c. d, d', tocks for inlet and outlet
of feed water to tubular heating surface.
Figure is a transverse section, and Figure 10 a sectional plan of
another modification of our improvements, shewing each bar formed
tubular and detached. a', a', a', are the fire-bars; b, b, b, tubes passing
through each, and connected alternately by the elbow tubes c, c, c;
d, d', cocks for inlet and outlet of feed water to tubular surface.
In Figures 4, 5, 6, 7, 8, 9, and 10 the water passes through the tubular
heating surface in the same manner as described in Figures 1, 2, and 3.
Having now particularly ascertained and described the nature of our
said Invention, and the manner in which the same is or may be used or
carried into effect, we may observe in conclusion that we do not restrict
or confine ourselves to the precise details or arrangements which we
have had occasion to describe or refer to, as many variations may be
made therefrom without deviating from the principles or main features
of our Invention; but what we consider to be novel or original, and
therefore claim as the Invention secured to us by the herein-before in
part recited Letters Patent is,
Firstly. The heating of feed water by passing it through tubular
fire-bars in the furnace previous to passing it into the boiler.
Secondly. The heating of feed water by passing it through a tubular
surface arranged underneath the fire-bars, as illustrated in Figures 4, 5,
and 6 of the accompanying Drawings,

page_text: and set forth in Figures 1, 2, 3, 7, 8, 9, and 10 of the Drawings hereunto
attached.
In witness whereof, we, the said Jonathan Thompson Gaze and James
Hymas, have hereunto set our hands and seals, this Twenty-first
day of March One thousand eight hundred and seventy.
In witness whereof, we, the said Jonathan Thompson Gaze and James
Hymas, have hereunto set our hands and seals, this Twenty-first
day of March One thousand eight hundred and seventy.
JONATHAN THOMPSON GAZE. (L.S.)
JAMES HYMAS.
(L.S.)