IMPROVEMENTS IN THE FURNACES OF STEAM BOILERS AND OF FURNACES FOR ANY OTHER PURPOSE, WHERE STEAM CAN BE OBTAINED [FOR USE AS REQUIRED
Year: 1882

page_text: PROVISIONAL SPECIFICATION left by John Williams at the Office of the
Commissioners of Patents on the 16th December 1882.
JOHN WILLIAMS Iron Merchant of Cardiff in the County of Glamorgan,
IMPROVEMENTS IN THE FURNACES OF STEAM BOILERS AND OF FURNACES FOR
ANY OTHER PURPOSE, WHERE STEAM CAN BE OBTAINED [FOR USE AS REQUIRED;]
According to my invention I pass a blast of air between each bar at the front of
the grate by means of a hollow chamber, at the mouth of the furnace, the top of
the said chamber to form, the usual dead plate, and to carry the front end of the fire
bars, the back or inner side perforated with suitable holes so arranged as to allow
a blast of air and steam to pass directly between each fire bar and upwards through
the fuel, thus increasing the draught and assisting in the combustion of the fuel in
the furnace.
The said blast is produced, by means of a jet of steam taken from the steam
space of the boiler and conveyed by a suitable pipe, fitted with regulating valve or
cock, to a suitable orifice in front of the before mentioned hollow chamber, the
steam rushing through the chamber takes with it a strong current of air which
passes through the above mentioned holes, or perforations on the innerside of the
hollow chamber between the fire bars, thence upwards through the burning fuel.
I also place in the combustion chamber, at the back of, and at a suitable distance
from the bridge a second hollow chamber perforated on the face with a suitable
number of holes to allow the escape of air and steam to mingle in a heated state
with the unconsumed gases, escaping over the bridge, thereby mixing with them a
sufficient proportion of oxygen gas thus effecting more perfect combustion and
producing flame instead of smoke to pass over the remaining heating surface. The
said second chamber to be secured by means of a suitable connection to Iron Bridge
plates. The oxygen gas is supplied by means of a pipe attached to the hollow
chamber and conveyed under the fire bars to front of Furnace, where, into the open
end of the said pipe, a jet of steam will be introduced, thus causing a strong current
of air to pass through that pipe into the before mentioned chamber, and through
ts perforated face, into the combustion chamber, producing flame & creating a
trong up draught, whereby the smoke nuisance is considerably abated.
Having described the nature and purpose of my invention and its mode I wish
o be distinctly understood, that I claim as my invention of improvements in

page_text: Furnaces of steam boilers and furnaces for any other purpose where steam can be
obtained as follows
First. The hollow chamber at the front of furnace with perforations as herein
.before described.
Secondly. The hollow chamber with perforations, and steam and air blast pipes
in combination as herein before described
Thirdly the Hollow Chamber in the combustion Chamber as herein before
described.
Fourthly. The combination of Hollow Chamber in the combustion chamber and
steam and air blast pipes as herein before described.
Lastly The combination of air chamber with perforations at front of furnace,
and steam and air blast pipes; and hollow chamber perforated in the combustion
chamber, with steam and air blast pipes, as hereinbefore described.