Improvements in the Construction of Steam Boiler and other Furnaces.
Year: 1888

page_text: Date of Application, 29th Dec., 1888
Complete Specification Left, 28th Sept., 1889-Accepted, 28th Dec., 1889
Improvements in the Construction of Steam Boiler and other
Furnaces.
1 PETER ROSCOW of Hacken Lane, Darcy Lover near Bolton in the County of
Lancaster Engine Driver do hereby declare the nature of this invention to be aš
follows:-
This invention relates to the construction of Steam Boiler and other furnaces the
object of the invention being to improve the effective combustion of the fuel and to
prevent the formation of smoke.
For this purpose I employ at the back of the fire bars a cast iron frame fitting
into the flue and having its upper surface or plate horizontal and about flush with the
level of the fire bars. The back end of this casting is vertical and fills in the
whole space below the bridge at the back of the ash pit, no brick wall being
required.
On the front part of the upper surface or plate is supported a plain fire brick
bridge, and at the back of this bridge is an opening in the top plate extending across
the flue and being (say) about three inches wide (more or less).
Over this opening is a narrow air chamber made of cast iron the interior of which
at the bottom is of about the same width as the said opening which it covers, and it
is contracted towards the top to about one third of such width, and terminates about
level with or rather higher than the top of the brick bridge, so that a keen current
of air from the ash pit can be admitted at this point when desired.
The bottom opening leading into this chamber from the ash pit is provided with a
door or damper hinged to the top plate at the back and opening downwards so that
its tendency is always to remain open and admit a sharp current of air just behind the
bridge.
This door or damper is provided with an arm to which is attached a chain which
extends along the ash pit to the front, so that by pulling this chain the fireman can
close the opening to the air chamber more or less as he may think requisite and by
passing one or other of the links of the chain over a fixed peg or other fastening he
can retain the door or damper in the required position (either partially or entirely
closed) for any desired length of time, and then by releasing the chain he can allow
the door to open to a greater, or to its fullest extent, and by these means the
admission of the requisite amount of air at this point to carry on the combustion of
the fuel in the most economical manner without the formation of smoke, is perfectly
under the control of the fireman at all times.
Dated this 50th base of Darombi 1000
GEORGE DAVIES,
4, St. Ann's Square, Manchester, Agent for the Applicant.
COMPLETE SPECIFICATION.
Improvements in the Construction of Steam Boiler and other
Furnaces.
I PETER ROSCow of Hacken Lane Darcy Lever near Bolton in the County of
Lancaster Engine Driver do hereby declare the nature of this invention and in what
manner the saine is to be performed, to be particularly described and ascertained
in and by the following statement :-
My invention relates to the construction of steam boiler and other furnaces, the
object of the invention being to improve the effective combustion of the fuel and to
prevent the formation of smoke

page_text: 1.
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 drawings.bereanto annexed and the following explanation, thereof.
Fig. 1 represents a longitudinal section of so much of a boiler flue and furnace as is
necessary to illustrate the application of my invention thereto, and
Fig. 2 is a transverse section of the same, a being a portion of the flue, the firo
door, and the fire bars.
C
For the purposes of my invention I employ at the back of the fire bars ca cast
iron framed fitting into the flue a and having its upper surface or plate horizontal and
about flush with the level of the fire bars c. The back end of this casting dis vertical
and fills in the whole space below the bridge e at the back of the ash pit fno brick
wall being required.
On the front part of the upper surface or plate d is supported a plain.fire brick
bridge e and at the back of this bridge is an opening in the top plate extending
across the flue a, being (say) about three inches wide (more or less).
Over this opening is a narrow air chamber made of cast iron the interior of
which at the bottom is of about the same width as the said opening which it covers,
and it is contracted towards the top to about one third of such with, and terminates
aliout level with or rather higher than the top of the brick bridge e so that a keen
current of air from the ash pit can be admitted at this point when desired.
The bottom opening leading into this chamber from the ash pit is provided with
a door or damper hinged to the top plate d at the back and opening downwards so
that its tendency is always to remain open and admit a sharp current of air just
behind the bridge.
In the drawing this damper is shown as partly open.
This door or damper is provided with an arm kto which is attached a chain
which extends along the ash pit to the front so that by pulling this chain the
fireman can close the opening to the air chamber more or less as he may think
requisite and by passing one or other of the links of the chain over a fixed peg or
other fastening by preference attached to the door he can retain the door or damper i
in the required position (either partially or entirely closed) for any desired length
of time and then by releasing, the chain 7 he can allow the door i to open to a greater,
or to its fullest extent, and by these means the admission of the requisite amount of
air at this point to carry on the combustion of the fuel in the most economical
munner without the formation of smoke, is perfectly under the control of the fireman
at all times.
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-
The combination in a steam boiler or other furnace, of the frame or casting closing
the back of the ash pit and provided with an opening behind the bridge, the said
opening leading to a narrow air chamber (which is contracted towards the top and
terminates about level with the top of the bridge) and being opened or closed by a
door or damper hinged to the frame and opening downwards substantially in the
manner and for the purposes hereinbefore set forth and illustrated by the drawings
annexed.
Dnto this 97th day of Santambor 1880
GEORGE DAVIES,
4, St. Ann's Square, Manchester, Agent for the Applicant.