Year: 1898

page_text: Date of Application, 27th Jan., 1898
Complete Specification Left, 27th Oct., 1898-Accepted, 10th Dec., 1898
İ, HENRY LOWE, of 1 and 3, North Street, Royton, in the County of Lancaster,
Millwright, do hereby declare the nature of this invention to be as follows:-
The object of this invention is to burn the black smoke formed by the supply to
the fire of fresh coal.
For this purpose I connect the two flues of a two flued boiler together by a passage
at the front of the furnaces, or I divide the flue of a single 'flued boiler, and I provide
the two flues at a suitable point behind the bridges with dampers and means for
shutting one flue while the other is left open. The fireman supplies the coal to the
furnace the flue of which has been shut, and the smoke arising from the fresh fuel
will be drawn through the connection at the front of the boiler into the other flue.
over the fire which has not been supplied with fresh fuel, and will be consumed
thereby.
As soon as the fire in the freshly supplied furnace has ceased to produce black
smoke, and the fuel has become suitably ignited, its damper can be opened and that
of the other furnace can be shut, and fresh fuel supplied to this second furnace, the
damper of which can be opened again when the formation of black smoke has ceased,
and so on, the furnaces being fired up alternately.
When applying my invention to an existing two flued boiler of the ordinary
Lancashire type, I take out the dead plates and extend the dead ends about two feet
and a half outwards bringing the fire doors out along with them.
I then enclose by a fire brick lined or other casting the space between the boiler
front and the doors thus forming a passage or connection between the two
flues.
At the back of the fire bars at a suitable distance behind the bridge-wall I provide
a damper in each flue, and each damper is provided with suitable means for opening
or closing it from the outside of the boiler, say by a lever or levers and a connecting
rod or otherwise.
The fire bars are brought forward to fresh dead plates fitted to the casting above
described.
In the case of boilers made with one flue only, or boilers, which are fired underneath,
I may divide the fire space or furnace lengthwise into two parts so as to form
practically two flues connected in front and provided with dampers at the back as
previously specified.
In the case of new two flue boilers I propose to modify them at the front so as to
provide a connection between the flues just behind or within the boiler
front.
Dated this 26th day of January 1898.
7.)
.8

page_text: I, HENRY LOWE, formerly of 1 and 3, North Street, now of Arncliffe, Church
Street, Royton, in the County of Lancaster, Millwright, 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 :-
The object of this invention is to burn the black smoke formed by the supply to
the fire of fresh coal or fuel.
The nature of my said invention and the manner in which the same is to be
performed or carried into practical effect will be readily understood on reference to
the two sheets of drawings hereunto annexed and the following explanation thereof.
On Sheet of the drawings Fig. 1 is a front elevation of an ordinary two flued
boiler with my invention shown as applied thereto, and Fig. 2 is a partial transverse
section through the brickwork hereinafter referred to.
On Sheet 2 of the drawings Fig. 3 is a horizontal section of the boiler through both
flues taken at about the fire level. Fig. 4 is a transverse section through one of the
flues showing a face view of one of the dampers (closed).
The above mentioned views illustrate the application of my invention to an exist-
ing boiler, and Fig. 5 shows in transverse section a modification illustrating the
manner in which I prefer to apply my invention in constructing a new boiler.
a represents part of the boiler, b and 6x the two flues, c and ex the firebars, e the
cast iron front plate with fire doors f and fx.
To apply my invention to a two flued boiler of the ordinary Lancashire type (see
Figs. 1, 2, 3 and 4 on the drawings) I remove the ordinary dead-plates and I bring
the cast iron front plate e about two feet and a half outwards, bringing the fire
doors and fout with them (see Fig. 3), and I bring the fire-bars c and c* also
forward level with the end of the boiler leaving a passage or connection between the
two furnaces in which I fit a long dead-plate d extending across both flues. This
space is enclosed by the casting forming the front plate e which I prefer to arch over
and line with firebrick as shown at g.
At the back of the fire-bars at a suitable distance behind the bridge-wall h I
provide a damper i in each flue. These dampers are preferably mounted on vertical
pivots as shown at Fig. 4 but they may be otherwise arranged, and each damper is
provided with suitable means for opening and closing it from the outside of the boiler,
(say) by a tumbling lever or levers k and a connecting rod or rods l, or with any other
suitable device.
The dampers may be made of cast iron or other suitable metal and may be lined
or faced with fire-brick or other fire-proof material.
.The fireman supplies the coal or fuel to the furnace c the flue of which is closed
by its damper i, and the smoke arising from such fresh fuel not being able to pass
along the flue b will be drawn through the passage or connection at the front of the
boiler a into the other flue 6x over the fire cx which has not been supplied with fresh
fuel and it will be consumed thereby.
As soon as the fire in the freshly supplied furnace c has ceased to produce black
smoke and the fuel has become suitably ignited its damper i may be opened, and that
of the other furnace c* can be shut and fresh fuel supplied to this second furnace, the
damper of which can be opened again when the formation of black smoke has ceased
and both flues remain open till fresh fuel is needed, and so on, the furnaces c and c
being fired up alternately.
In constructing a new two flued boiler according to my invention I prefer to
dispense with the built-on chamber in front of the two furnaces and to form a com-

page_text: bustion box connecting the two furnaces together near the front as shown by dotted
lines at m on Fig. 3, and also in transverse section at Fig. 5, and I also sometimes
connect the two flues 6 and 6x together behind the dampers as shown dotted at m
on Fig. 3, and in the case of boilers with only one flue, or boilers which are fired
underneath, I may have the furnace divided into two longitudinally by a midfeather
extending also into the flue so as to make it practically into two flues connected
together at the front and provided with dampers at the back, and use them as
alternately fired furnaces as herein before specified.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
First. The method of constructing arranging and connecting the furnaces and
flues of a two flued steam boiler and fitting the said flues with dampers so that, the
furnaces being supplied with fresh fuel alternately, the smoke from the freshly
supplied furnace may be drawn over the other furnace which is red and thus con-
suined, and so on alternately so that no black smoke is allowed to pass into the flues,
substantially as herein before described and illustrated by the drawings annexed.
Secondly. In boilers made with one flue only or boilers which are fired under-
neath I claim dividing the fire space or furnace lengthwise into two parts by a
midfeather extending into the flue so as to form it practically into two connected
together at or near the front and providing the same with dampers at or near the
back substantially in the manner and for the purposes hereinbefore specified.
Dated this 95th day of Anthon 1000
GEO. DAVIES & SON,
Agents for the Applicant, 4, St. Ann's Square, Manchester.