Improvements in Apparatus for Consuming Black Smoke.
Year: 1897

page_text: Date of Application, 1st May, 1897
Complete Specification Loft 20th Inn 1000
Accented 10th Mar
1000
PROVISIONAL SPECIFICATION.
Improvements in Apparatus for Consuming Black Smoke.
HENRY LEE, 9, David Street, Bradford, Manchester, Engineer, do hereby declare
the nature of this invention to be as follows:-
The apparatus consists of a semi-circular cast iron plate forming the lower half
of the bridge of the boiler, having two openings in at the back, forming inlets
to ignition tubes which are fixed at an angle of 65° to the plate. In front of the
said plate is fixed two pedestals carrying an 1" shaft having two dampers screwed
on to the same. These dampers are worked by a wrought iron rod attached to a
lever and screwed to aforesaid shaft, the rod extending to the outside of the boiler
front & through a guide fixed to door frame, the said lever having notches or teeth
cut to allow for opening the aforesaid dampers to any required distance.
The improvement in this apparatus is that the air coming under the fire bars
and through the ignition tubes is warmed, and meeting the coal gasses 41" below
the bridge and from 17" to 24" from the bridge-according to the size of boiler---
causing them to ignite the fresh air, which meeting the gasses in an angular
direction causes no contraction of the crown plates of the furnace tubes, as in the
case of split bridges and forced draught by steam.
Dated this 30th day of April 1897.
Improvements in Apparatus for Consuming Black Smoke.
I, HENRY LEE, of 9, David Street, Bradford, Manchester, Engineer, do hereby
declare the nature of this invention and in what manner the same is to be pe"-
formed, to be particularly described and ascertained in and by the following
statement:-
My invention relates to an improvement in apparatus for consuming black
smoke.
The improved apparatus consists of a semicircular cast iron plate forming the
front part of the bridge of the boiler flue, and having say two openings at the
back forming inlets to ignition or air supply tubes which are fixed at an angle
of sixty five degrees to the plate. In front of the said plate are two pedestals or
brackets carrying a shaft on which are fixed two valves or dampers over the
openings to the air supply tubes. These dampers are worked by an iron rod
attached to a lever fixed on the shaft, the rod extending to the outside of the
boiler front or through a guide fixed to the door frame.

page_text: in the accompanying sheet of drawings—
Figure 1 is a longitudinal section of part of a furnace flue to which my improve-
ments are applied. Figure 2 is a front view, and Figure 3 a plan of the bridge.
In these views, a designates the furnace flue, b the fire bars, c the bridge, d the
semicircular cast iron plate, e the ignition or air supply pipes, f the brackets cast
or secured on the plate d; g the shaft supported in the said brackets, h the
dampers fixed on the shaft g and closing the openings in the plate which lead to
the air supply tubes, i the lever fixed on the shaft g and j the rod connected to the
lever i and leading to the front of the boiler.
By moving the rod j the dampers h can be fully or partly opened so as to allow
any desired quantity of the air coming under the firebars, where it is warmed,
to flow through the openings in the plate d and through the supply tubes e into
the flue at the back of the bridge where the warm air meeting the gases from the
furnace at a point say about four or five inches below the level of the bridge and
about say twenty four inches from the plate forming the front of the bridge or
more or less according to the size of the bridge and flue causes the gases to ignite
and so promotes combustion and prevents the emission of dense or black smoke.
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 :-
In combination, the furnace flue, the bridge, the plate with air supply tubes,
set relatively to the plate and bridge as described and the dampers actuated by a
rod from the front of the boiler, all substantially as and for the purposes herein
set forth.
1000