IMPROVED ARRANGEMENTS FOR GENERATING STEAM IN STEAM BOILERS AND OTHER VESSELS, AND FOR HEATING THE LIQUID CONTENTS THEREOF
Year: 1863

page_text: LETTERS PATENT to Owen Murrell, of Bethnal Green Road, in the
County of Middlesex, for the Invention of "IMPROVED ARRANGEMENTS FOR
GENERATING STEAM IN STEAM BOILERS AND OTHER VESSELS, AND FOR HEATING
THE LIQUID CONTENTS THEREOF."
Sealed the 29th August 1863, and dated the 2nd March 1863.
PROVISIONAL SPECIFICATION left by the said Owen Murrell at the
Office of the Commissioners of Patents, with his Petition, on the
2nd March 1863.
I, OWEN MURRELL, of Bethnal Green Road, in the County of Middlesex, do
hereby declare the nature of the said Invention for "IMPROVED ARRANGEMENTS
FOR GENERATING STEAM IN STEAM BOILERS AND OTHER VESSELS, AND FOR HEATING
THE LIQUID CONTENTS THEREOF," to be as follows:-
This Invention consists in causing the water in steam boilers to pass from
the lower part thereof through a series of horizontal bent pipes constituting
the fire-bars of the furnace of the boiler, said pipes extending in a longitudinal
direction up to the bridge of the furnace, and then in a zig-zag direction across
the face of said bridge; thence a smaller pipe passes from the end of the
uppermost of said zig-zag pipes to the front of the furnace, and turns upwards
outside the front of the furnace, and is finally connected to the boiler at the
front thereof at a point above the level of the water therein. The pipe
employed to convey the water from the boiler, as above stated, passes outside
of the boiler, and extends downwards nearly to the bottom of the ash-pit, then
bends upwards, and is connected to a cross pipe situated within the furnace,
and to which the series of hollow fire-bars before mentioned are connected.
By means of this bent pipe throttling of the water in said bars or pipes is

page_text: prevented. The aforesaid pipes are fitted with suitable cocks for feeding,
stopping, blowing off, and gauging or testing the state of the heated water
passing through same.
An important feature in this Invention. consists. in. adapting underneath
each of the aforesaid longitudinal pipes in the furnace a V-shaped plate or
shield for protecting said pipes from the action of cold air. The effect of the
foregoing arrangement is as follows:-The bulk of water in the boiler, instead
of being converted into steam solely by the surface heat from the fire in
the furnace, as commonly practised, is caused also to pass from the boiler
through the hollow fire-bars aforesaid, by which it becomes heated and con-
verted into steam quickly, the steam passing into the boiler at a point above
the level of the water therein, or, if necessary, heated water only may be caused
to enter the boiler.
The above Invention may be applied to large coppers or pans for boiling
the liquor therein. I am aware of hollow fire-bars having heretofore been
employed for conveying water through same to be heated and employed for
feeding said boilers with water, I desire it therefore to be understood that
this Invention consists solely in the manner above described of arranging
hollow fire-bars and of connecting them to a steam boiler or other vessel
either for generating steam or boiling the water or liquor therein.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Owen Murrell in the Great Seal Patent Office on the
2nd September 1863.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, OWEN
MURRELL, of Bethnal Green Road, in the County of Middlesex, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Second day of March, in the year of our Lord
One thousand eight hundred and sixty-three, in the twenty-sixth year of
Her reign, did, for Herself, Her heirs and successors, give and grant unto me,
the said Owen Murrell, Her special licence that I, the said Owen
Murrell, my executors, administrators, and assigns, or such others as I, the
said Owen Murrell, 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 "IMPROVED
ARRANGEMENTS FOR GENERATING STEAM IN STEAM BOILERS AND OTHER VESSELS, AND

page_text: FOR HEATING THE LIQUID CONTENTS THEREOF," upon the condition (amongst others)
that I, the said Owen Murrell, 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 Owen Murrell, do hereby declare the
nature of the said Invention, and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement, that is to say:-
This Invention consists in causing the water in steam boilers to pass from the
lower part thereof through a series of horizontal bent pipes constituting the fire-
bars of the furnace of the boiler, said pipes extending in a longitudinal direction
up to the bridge of the furnace, and then in a zig-zag direction across the
face of said bridge; thence a smaller pipe passes from the end of the upper-
most of said zig-zag pipes to the front of the furnace, and turns upwards
outside the front of the furnace, and is finally connected to the boiler at the
front thereof at a point above the level of the water therein. The pipe
employed to convey the water from the boiler, as above stated, passes outside
of the boiler, and extends downwards nearly to the bottom of the ash-pit, then
bends upwards, and is connected to a cross pipe situated within the furnace,
and to which the series of hollow fire-bars before mentioned are connected.
By means of this bent pipe throttling of the water in said bars or pipes is
prevented. The aforesaid pipes are fitted with suitable cocks for feeding,
stopping, blowing off, and gauging or testing the state of the heated water
passing through same.
. An important feature in this Invention consists in adapting underneath each
of the aforesaid longitudinal pipes in the furnace a V-shaped plate or shield for
protecting said pipes from the action of cold air. The effect of the foregoing
arrangement is as follows:-The bulk of water in the boiler, instead of being
converted into steam solely by the surface heat from the fire in the furnace,
as commonly practised, is caused also to pass from the boiler through the
hollow fire-bars aforesaid, by which it becomes heated and converted into
steam quickly, the steam passing into the boiler at a point above the level of
the water therein, or, if necessary, heated water only may be caused to enter
the boiler.
The above Invention may be applied to large coppers or pans for boiling
the liquor therein. I am aware of hollow fire-bars having heretofore been

page_text: employed for conveying water through same to be heated and employed for
feeding said boilers with water, I desire it therefore to be understood that
this Invention consists solely in the manner above described of arranging hollow
fire-bars and of connecting them to a steam boiler or other vessel either for
generating steam or boiling the water or liquor therein.
In order to explain my said Invention as completely as possible, I now
proceed to describe the best means I am acquainted with for carrying the
same into practical effect, reference being had to the illustrative Sheet of
Drawings accompanying these Presents, and to the numeral figures and letters
of reference marked thereon respectively, as follows:-
DESCRIPTION OF THE DRAWING.
Figure 1 represents a front view of a Cornish boiler with my improvements
adapted thereto; Figure 2 is a perspective view of my improved furnace bars
detached from the boiler; Figure 3 is a front view of an ordinary cylinder
boiler fitted with my improvements; Figure 4, my improved bars detached;
Figure 5 shews a mode of connecting my improved furnace bars together;
Figure 6, a metal shield for protecting my improved bars from the action of
cold air upon the under part thereof; Figure 7, a side elevation of said shield
and section of bearing bars for supporting the several shields; Figure 8,
transverse section of one of my improved bars and shields, drawn to an
enlarged scale, and shewing the relative position thereof when fixed for use;
Figure 9, a perspective sectional view of a series of said bars and shields. At
each of the foregoing Figures I employ similar letters of reference to denote
corresponding parts in so far as such parts appear or can be seen at each of
such said Figures respectively.
At Figures 1 and 2, a, a, mark my improved furnace bars formed of a
series of bent pipes connected together by T-pieces or screw joints b, or for
convenience they may be connected at both ends, as at Figure 5; these pipes
are connected to the front of the bridge plate c by supporting studs e, fixed
to or formed upon said bridge plate; f, the front bearing bar of furnace;
9, shields or V-shaped bars supported at their ends by the bearing bar fand
plate h, which latter serves to form the bridge of the furnace, as at Figure 2,
and 7 is a stud for enabling the bars g to be readily displaced and replaced when
necessary; i, blow-off and test cock connected to the outside pipe, forming one
of the series of furnace bars; a, a, said cock projecting beyond the front of the
furnace, as exhibited; k, feed and stop-cock fixed by a pipe to the front of
the boiler near the bottom thereof, said pipe being employed to conduct the
water from the boiler through the pipe into the bars a, a, so as to keep up a

page_text: constant circulation of water whilst the boiler is at work. The long leg of the
pipe m is connected to the same pipe or furnace bar as the test cock k, as at
Figure 1. The pipe m may be connected to the fire-bars at the back of the
ash-pit. I would here remark that this pipe forms an important feature in
my said Invention, as it prevents throttling of the water in the furnace bars.
In boilers where the water is considerably below the fire-bars, as in some
description of boilers, the bent pipe m may be dispensed with, and connection
made from near the bottom of the boiler to the fire-bars, and deliver the water
or steam above the water in the same boiler or other vessel. n is a delivery
and stop-cock connected to the furnace bars a by the pipe o, which by
preference is smaller than the other tubes (but any suitable size may be
employed) as exhibited, by which the water and steam as they pass through
said bars are delivered into the boiler above the level of the water therein,
either at the front or top of the boiler; p is the top blow-off or test cock
connected to the pipe o. In adapting this Invention to ordinary cylinder
boilers, I arrange the series of pipes a, a, at the sides as well as at the bridge
of the furnace, as exhibited at Figure 4, or the furnace bars only may be used.
I do not confine myself to the number or size of the tubes employed. The
water in the boiler or other vessel may be heated by my improved furnaco
only, the said boiler or other vessel not being exposed to the direct action of.
the fire as in ordinary boilers.
my
Having now fully described and set forth the nature and object of said
Invention for "Improved Arrangements for Generating Steam in Steam
Boilers and other Vessels, and for Heating the Liquid Contents thereof,
together with the best means I am acquainted with for carrying the same into
practical effect, I would remark, in conclusion, that I hereby declare my
Invention to consist in, and I claim, the general combinations and arrangements
of parts above described with reference to the illustrative Sheet of Drawings
accompanying these Presents, and especially I claim the pipe m for preventing
throttling of the water in hollow furnace bars, as above described, also the
shields g for protecting the bars a, a, as above stated.
In witness whereof, I, the said Owen Murrell, have hereunto set my
hand and seal, this Thirty-first day of August, in the year of our
Lord One thousand eight hundred and sixty-three.
OWEN MURRELL. (L.S.)