for the Consumption of SmOKU.
Year: 1885

page_text: for the Consumption of SmOKU.
I JAMES LEE of Hipperholme near Halifax in the county of York Tanner and
Currier, do hereby declare the nature of this Invention to be as follows:
I place my bars (in the flue) which are of ordinary construction, at the end of
the bars is the bridge preferably of fire bricks, behind the bridge is a space, and
behind the space the top half of the flue is built up or arched, so that as the sinoke
passes over the bridge, it must pass down under the arch, which is heated, the
smoke is kept low down in the flue, and passes through the fire, close under the
heated bricks or arch, and so is perfectly consumed.
I

page_text: Improvements in the Construction of the Flues of Steam Boilers
for the Consumption of Smoke.
I JAMES LEE of Hipperholme near Halifax in the county of York, Tanner and
Currier 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 :-
I place my bars in the flue, which are of ordinary construction; at the end of
the bars is the ordinary bridge, preferably of fire bricks, behind the bridge is a
space, and behind the space the top half of the flue is built up, forming a second
bridge, the bottom of which is below the line of the top of the first bridge, so that
as the smoke passes over the first bridge it must pass down under the arch which
is heated, the smoke is kept low down in the flue, and passes through the fire, and
close under, and in contact with the heated bridges and arch, and so is perfectly
consumed; in some cases it is preferred to arch partly or wholly over the fire box
with fire bricks.
By this means a clip draught is formed and the smoke and fire are mixed
together at the proper focus and burnt.
DESCRIPTION OF DRAWINGS.
Fig. 1 is a front elevation in section of boiler shewing my improvements
applied.
Fig. 2 is a similar view slightly modified.
Fig. 3 is a section of Fig. 1 at the ordinary bridge.
Fig. 4 is a section of Fig. 1 between the two bridges.
Fig. 5 is a section of Fig. 2 between the bridges.
Fig. 6 is a section of Fig. 2 between the bridges showing slight modifications in
the way of supporting the second bridge.
A is the boiler, B is the fire box, C are the fire bars, D is the ordinary front
bridge, E is the back bridge, which is placed at a proper distance from the front
bridge, that is, the space F, between them to be about the same area as the space,
over the front bridge, the bottom of the bridge E, must come below the front
bridge so that it draws the smoke and flames downwards, and causes them to clip
or combine together, when a fresh supply of coals is put upon the fire the damper
is opened so as to cause a good draught, this draws down the smoke, which
quickly passes between the bridges which are red hot, and cause a gradual ignition,
combustion, and explosion of the smoke or gaseous vapours, as the fire brightens
and the smoke is consumed, the damper should be lowered or closed, the top of the
fire box may also be wholly or partially arched over with thin fire bricks or
fireclay H, the second or back bridge may be supported in various ways as shewn
in the drawings, or in any other suitable manner, fire bricks may be carried
backwards in a line with the bottom of the back bridge, as far as found convenient,
and these back bricks J may be either solid or perforated; by the above arrange-
ments there is a saving of coal and labour the smoke being effectively burnt, there

page_text: is a great saving to the boiler, because it distributes the heat equally throughout
the boiler causing it to expand and contract equally, this arrangement of furnace
is also applicable to retorts and annealing furnaces.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what
I claim is:-
1. In the furnaces of steam boilers retorts, and annealing furnaces the use and
employment of a second bridge, at a distance beyond the first bridge, the second
bridge coming below the first bridge, so as to draw down the smoke for the
purposes shewn and described.
2. The general arrangement and construction of the furnace as shewn and
described.