Improvements in Steam Boiler and other Furnaces.
Year: 1895

page_text: Date of Application, 22nd June, 1895
'Complete Specification Left, 22nd Apr., 1896-Accepted, 6th June, 1896
PROVISIONAL SPECIFICATION.
Improvements in Steam Boiler and other Furnaces.
We, ROBERT ROBSON NEWLOVE of 53 Bright Street, Bradford, Nottingham,
Engineer, and HENRY WALKER HILL of 2 Church Gate Nottingham, Engineer,
do hereby declare the nature of this invention to be as follows :-
This invention relates to an improved arrangement or construction of steam
boiler and other furnaces for use with forced or induced draught; and an improved
construction or form of fire bar in connection therewith.
Our object being to effect economy in fuel thereby, and to have an arrangement
having few and simple parts.
For this purpose, we form each fire bar preferably in two or more longitudinal
parts; the upper part in contact with the fire-we form of cast or wrought iron or
steel, with the upper face chilled or hardened in some cases; and the lower part
we fit loosely into a recess or groove formed in the lower half or part of each fire
bar-which is formed of a Y or other suitable section, in such a manner that a
longitudinal channel or air conduit is thus formed throughout the length of each
compound bar when the two parts of same are placed together. At desired
intervals along this passage, we have a number of suitable outlets therefrom on
each side of the bar, and so arranged that small jets of heated air and steam or
other gases may be forced therefrom into the burning coal or fire on the bars.
Or we may
in other cases form these compound bars in two parts divided
vertically throughout their lengths, and suitably fastened together.
We force or induce-by means of one or more steam jets, a fan, or by other
suitable means one or more currents of heated air either into the longitudinal
channel or air conduit formed in each fire bar, or under the fire bars-simple or
compound-of any description of furnace. The air so forced or induced we
previously heat to any desired temperature by passing it along or through one or
more pipes placed in the boiler flue or flues; or by any other suitable and
convenient means.
When the beated air is forced or induced under the fire bars, we close the ash-
pit by a plate fitted with an air tight door for removing the ashes; and in some
cases with one or more adjustable shutters.
In some cases we connect the back ends of the longitudinal channels-formed
in the compound fire bars-with a cavity in the fire bridge, this cavity having one
or more outlets regulated by a damper which can be so adjusted as to admit any
desired quantity of forced or induced draught above or beyond the bridge.
In other cases also we may form each fire bar of such a form that they interlock
one with another when placed side by side; so that any bar or bars cannot be
displaced when in use.
Dated this 21st day of June 1895.
H. WALKER HILL,
2 Church Gate, Nottingham, Agent for the Applicants.

page_text: 334
We, ROBERT ROBSON NEWLOVE of 53 Bright Street, Bradford, Nottingham
Engineer, and HENRY WALKER HILL of 2 Church Gate, Nottingham, Engineer,
do hereby declare the nature of this invention and in what manner the same
is to be performed, to be particularly described and ascertained in and by the
following statement :-
This invention relates to an improved arrangement or construction of steam
boiler and other furnaces for use with forced or induced draught; and an improved
construction or form of fire bar in connection therewith.
Our object being to effect economy in fuel thereby, and to have an arrangement
having few and simple parts.
For this purpose we form each fire-bar preferably in two or more longitudinal
parts, the upper part in contact with the fire-we form of cast or wrought iron or
steel, with the upper face chilled or hardened in some cases; and the lower part
we fit loosely into a recess or groove formed in the lower half or part of each fire-
bar which is formed of a Y or other suitable section, in such a manner that a
longitudinal channel or air conduit is thus formed throughout the length of each
compound bar, when the two parts of same are placed together. At desired
intervals along this passage, we have a number of suitable outlets therefrom on
each side of the bar; and so arranged that small jets of heated air and steam-
or other gases-may be forced therefrom into the burning coal or fire on the bars.
Or we may in other cases form these compound bars in two parts divided
vertically throughout their lengths, and suitably fastened together.
We force or induce-by means of one or more steam jets, a fan, or by other
suitable means one or more currents of heated air; either into the longitudinal
channel or air conduit formed in each fire-bar, or under the fire-bars-simple or
compound of any description of furnace. The air so forced or induced we
previously heat to any desired temperature by passing it along or through one or
more pipes placed in the boiler flue or flues; or by any other suitable and convenient
means.
When the heated air is forced or induced under the fire-bars, we close the ashpit
by a plate fitted with an air tight door for removing the ashes; and in some cases
with one or more adjustable shutters.
In some cases we connect the back ends of the longitudinal channels-formed in
the compound fire-bars-with a cavity in the fire bridge; this cavity having one
or more outlets regulated by a damper which can be so adjusted as to admit any
desired quantity of forced or induced draught above or beyond the bridge.
In other cases also we may form each fire-bar of such a form that they inter-
lock one with another when placed side by side; so that any bar or bars cannot
be displaced when in use.
And in order that the said invention may be fully understood, and readily
carried out and into effect, we shall now proceed more particularly to describe
the same; and for that purpose shall refer to the several figures on the annexed
sheets of drawings, wherein the same letters of reference indicate corresponding
parts in all the figures.
Fig. 1 is a longitudinal section in elevation of a steam boiler fitted with our
invention.
Fig. 2 is an end elevation of the same boiler, partly in section along line A. B.
(Fig. 1).
Fig. 3 is a plan of the same boiler.
Fig. 4 is an elevation on an enlarged scale of our improved fire-bars; this view
being partly in section.

page_text: removed. This
Fig. 5 is a plan of these improved fire-bars, with one part “N
part "N" of each bar is removed by withdrawing the end "N" from the
socket "N3" of the next bar to it and then lifting out the end "N¹."
Fig. 6 is a transverse sectional elevation of these bars on line 1-2 (Fig. 5).
In Figs. 1-2 and 3, "A" is the steam boiler having heating or regenerator
pipe or pipes "D" fitted with funnel pipes "C, C" placed in the boiler Hue "R."
The pipe "D" terminates at the front end of the boiler with the breeches
pipes "E. E," to which we connect injector chambers F. F; which are supplied
with steam injecting jets from the boiler by the steam pipe "H" and regulating
valves "S. S."
The chambers "F. F" are fitted with distributing pipes "I, I" each communi-
cating with a hollow dead plate "K" fitted to each boiler tube.
One end of our improved fire-bars "W. N" fit into the dead plates "K, K";
and the other end into the fire-bridge "J," formed with a cavity "J," the outlet
into the boiler tube from which is regulated by the adjustable damper "P," by
which the outlet from "J1" can be adjusted from the front of the boiler by
rod "Q" to any desired extent.
The fire-bars shown in Figs. 4-5 and 6-are preferably cast two or more bars
together, and each bar in two parts. The lower part "W" is formed with a
channel "L," "L₁" from end to end, having at desired intervals along the walls
of this channel a number of grooves or recesses "M." The upper part "N" of
each bar is preferably formed of the section shown in Fig. 6 with its lower half
fitting loosely into the top of channel "L of the part "W"; thus forming a
cover to channel "L" with outlets "M, M" at the sides of and between each
bar. The ends of "N,N" are bevelled as shown, fitting loosely into bevelled
recesses in "W" to keep them in place.
"
The action of the whole apparatus is as follows:-Air at atmospheric tem-
perature is drawn into the funnels of pipes "C, C," is drawn down these pipes,
and along the interior of the heating pipe or pipes "D"-where it is heated to a
high temperature by the hot gases in flue "R"-thence along the breeches
pipes "E, E" into the injector chambers "F. F" from whence it is delivered by
the distributing pipes "I. I" into the hollow dead plates "K, K"; thence along
the channels "L, L" of our improved fire-bars "W. N," which allow the heated
air to issue from outlets "M. M" on the sides of the bars in a number of small
jets equally distributed over the whole area of the fire.
66
"
This current or draught of air is obtained by means of one or more jets of
steam in each injector chamber "F. F," steam being supplied thereto by pipe "H"
and regulating valves "S.S." In some cases we may use one or more inducing
jets of steam at the funnels of pipes "C. C," or in any other desirable place.
The damper "P" at bridge "J" is adjusted so as to admit any desired portion
of the heated air to pass through the bridge "J" to mix with and consume the
smoke passing over it. And in some cases we may form certain of our fire-bars
without the outlets "M" -as shown at "L'L" in Fig. 6, so as to form an air
channel to convey the air direct to the bridge "J" instead of passing away to the
fire over these bars so formed.
In other cases we may send a current of heated air through the bars direct to
the bridge "J" by one or more steam jets in combination with either natural
draught admitted under the fire-bars in the usual manner; or in combination with
lo which cases
induced draught of either heated or cold air under the same.
the whole of the bars are formed without the outlets "M, M"-as shown at
bars "L', L" Fig. 6; which thus form channels to convey heated air direct to
the cavity "J" in bridge "J"; the air required for combustion in the fire passing
between the bars in the usual manner, or by induced draught of previously heated
or of cold air. All these currents of air may be previously heated by any other
convenient and ordinary means other than tuat described above and shown in the
drawings.

page_text: Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :-
1st. In steam boiler and other furnaces the method of supplying one or more
currents of forced or induced previously heated air, by means of separate air
channels formed in the fire-bars, and outlets therefrom at the sides of the bars into
the fire in the furnace for the purposes mentioned and substantially as herein before
described and as illustrated in the drawings herewith.
2nd. In steam boilers and other furnaces the means of supplying one or more
currents of highly beated air through channels in fire-bars to or beyond the fire
bridge with an opening therein controlled by a damper operated from the boiler
front substantially as herein before described and shown in the drawings
herewith.
3rd. Fire-bars constructed in two or more parts in combination with air channels
formed therein for conveyance of induced or forced currents of heated air to the
furnace and fire bridge all for the purposes mentioned and substantially as set
forth herein and shown in the drawings.
4th. Steam boiler and other furnaces supplied with one or more induced draughts
of air previously heated to a high temperature in combination with air channelled
fire-bars conveying the heated air to the furnace and bridge substantially as
herein before set forth and shown in the drawings.
5th. In steam boiler and other furnaces the arrangement and combination of
parts for the purposes mentioned and substantially as herein before described and
shown in the drawings.
6th. In fire-bars the arrangement and combination of parts as shown in
Figs. 4-5 and 6 for the purposes and substantially as herein before described and
set forth and shown in the drawings.
Dated this 21st day of Anril 1806
H. WALKER HILL,
2 Church Gate, Nottingham, Agent for the Applicants.
H. WALKER HILL,
2 Church Gate, Nottingham, Agent for the Applicants.