Improvements in and applicable to Furnaces for Steam Boilers.
Year: 1895

page_text: Date of Application, 28th Jan., 1895
Complete Specification Left, 21st Oct.. 1895-Accepted, 23rd Nov., 1895
PROVISIONAL SPECIFICATION.
Improvements in and applicable to Furnaces for Steam Boilers.
I JOSEPH BRADBURY of Brook Iron Works Charles Street Manchester in the
County of Lancaster Engineer do hereby declare the nature of this invention to
be as follows:-
The object of this invention is the construction of a furnace in which a low class
of fuel may be consumed without emitting smoke.
In carrying out my invention I construct the fire bars of the furnace with a
projection at right angles to the length of the bar at each end and also form on
the underside of the bar at each end a recess designed to receive the projection
upon the bar lying next alongside and in this manner it is impossible for any of the
bars to be misplaced by the fireman when cleaning the fire and removing clinker.
I further take a pipe provided with a stop valve from the top of the boiler and
pass such pipe into the furnace at one side of the door into the furnace at one side
of the door and carry the same to about the centre of the furnace at the top of the
door where 1 introduce a suitable jet with the orifice of such jet pointing over the
fire I then continue such pipe and bring it out at the opposite side of the door and
terminate the same with a jet pointing into a blast pipe mounted underneath the
fire bars and this blast pipe 1 enamel on the inside. The action of this furnace is
as follows: The fire bars are placed in position with a very small space between
them and upon a slight pressure of steam being raised with such fuel as will burn
the stop valve in the pipe hereinbefore mentioned is turned on and a jet of steam is
projected over the fire and a further jet projected up the blast pipe and as this pipe
is enameled on the inside a very strong blast of air is forced through the spaces
between the bars and this enables a very low class of fuel to be consumed and the
small jet over the fire serves the purpose of preventing the products of combustion
being driven out of the fire door when fresh fuel is being supplied. It will be
obvious that more than one blast pipe may be used if necessary.
Deted this 26th day of lanvar 1805
COMPLETE, SPECIFICATION.
Improvements in and applicable to Furnaces for Steam Boilers.
I JOSEPH BRADBURY of Brook Iron Works Charles Street Manchester in the
County of Lancaster 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 :-
The object of this invention is the construction of a furnace in which a low class
of fuel may be consumed without emitting smoke.
In carrying out my invention I construct the fire bars of the furnace with a
projection at right angles to the length of the bar at each end and also form on the
underside of the bar at each end a recess designed to receive the projection upon
the bar lying next alongside and in this manner it is impossible for any of the bars.
DOJ1

page_text: to be misplaced by the fireman when cleaning the fire and removing clinker.
I further take a pipe provided with a stop valve from the top of the boiler and in
the length of this pipe near the hinge of the fire door I arrange a plug cock
provided with a slotted lever which slotted lever is designed to be engaged by a
stud projecting from the fire door in such a manner as to cause the plug cock to be
shut off when the fire door is opened and to be open when the fire door is closed.
I now pass the pipe into the furnace and carry the same to about the centre of the
furnace at the top of the door where I introduce a suitable jet with the orifice of
such jet pointing over the fire I then continue such pipe and bring it out at the
opposite side of the door and terminate the same with a jet or jets pointing into a
blast pipe or pipes mounted underneath the fire bars and this blast pipe or these
blast pipes I enamel on the inside.
And in order that my invention may be more readily understood and carried
into effect I have hereunto annexed a sheet of drawings illustrative of the same
which I will now proceed to explain with the assistance of the figs, and letters of
reference marked thereon.
Fig. 1 is a front view and Fig. 2. a sectional elevation of my improved furnace
and
Fig. 3 is an elevation and Fig. 4 a plan of so much of the fire bars on an
enlarged scale as is necessary to illustrate my improvements.
Like letters are used in all views to denote like parts.
I construct the fire bars A of the furnace with a projection B at right angles to
the length of the bar at each end and also form on the underside of the bar A at
each end a recess C designed to receive the projection B upon the bar lying next
alongside and in this manner it is impossible for any of the bars to be misplaced by
the fireman when cleaning the fire and removing clinker. I further take a pipe D
provided with a stop valve from the top of the boiler and in the length of this
pipe D near the binge of the fire door I arrange a plug cock E provided with a
slotted lever F which slotted lever F is designed to be engaged by a stud G
projecting from the fire door in such a manner as to cause the plug cock E to be
shut off when the fire door is opened and to be open when the fire door is closed.
I now pass the pipe D into the furnace and carry the same to about the centre of
the furnace at the top of the door where I introduce a suitable jet H with the
orifice of such jet H pointing over the fire I then continue such pipe D and bring
it out at the opposite side of the door and terminate the same with a jet or jets!
pointing into a blast pipe or pipes J mounted underneath the fire bars and this
blast pipe or these blast pipes 1 enamel on the inside.
The action of this furnace is as follows:-The fire bars A are placed in position
with a very small space between them and upon a slight pressure of steam being
raised with such fuel as will burn the stop valve in the pipe D is turned on and a
jet of steam, is projected over the fire and a further jet or jets projected up the
blast pipe or blast pipes and as this pipe or these pipes is or are enameled on the
inside a very strong blast of air is forced through the spaces between the bars and
this enables a very low class of fuel to be consumed and the jet H serves the
purpose of preventing the products of combustion being driven out of the fire
door.
Having thus particularly described and ascertained the nature of my said
invention together with the best methods with which I am acquainted for carrying
the same into effect I wish it to be understood that I do not confine myself to the
precise details relative proportions or dimensions of the various parts hereinbefore
described and illustrated on the accompanying drawing but what I claim is
Firstly. The use and application of the combination substantially as hereinbefore
described and illustrated on the accompanying drawing.
Secondly. The use and application to furnaces of a blast pipe or pipes enamele
on the inside as hereinbefore described and illustrated on the accompanying
drawing.

page_text: Thirdly. The use and application to furnaces of fire bars provided with
projections and recesses substantially as hereinbefore described and illustrated on
the accompanying drawing.
7
.
1005
JOSEPH BRADBURY.