Improvements in the Arrangement or Construction of Flues for Boiler and other Furnaces
Year: 1893

page_text: Date of Application, 27th June, 1893
Complete Specification Left, 27th Mar., 1894-Accepted, 12th May, 1894
PROVISIONAL SPECIFICATION.
Improvements in the Arrangement or Construction of Flues for
Boiler and other Furnaces.
I, THOMAS GARDNER of Kirkland's Land, Newmains in the County of Lanark,
Contractor, do hereby declare the nature of this invention to be as follows:
--
This invention has for its object to economise fuel in boiler and other furnaces by
improved arrangements of the furnace flues and dampers whereby the fire gases are
led from one furnace or combustion chamber working at full power to and through
others in which smaller supplies of solid liquid or gaseous fuel are consumed the
surplus heat from the first furnace being used to reinforce the heat power in the
other furnaces or combustion chambers.
In carrying out the invention as applied to boiler furnaces the fire gases passing
through the boiler flues in the case of Lancashire boilers or under the boiler in the
case of egg-ended or other externally fired boilers is brought back either through a
specially built flue or one of the existing flues, which is disconnected from the
chimney, and led through the furnace or combustion chamber of an adjoining boiler
in which is a fire insufficient in itself to maintain the boiler under steam and thence
the whole fire gases are led through the flues either direct to the chimney or through
a third boiler furnace, similarly underfired, on their way to the chimney, suitable
dampers being provided so that any one of the boilers may be fully fired and the
resulting products of combustion led to and through the adjoining boiler or boilers
in any order desired.
In applying the invention to steel melting furnaces or to furnaces for heating gas
or oil retorts or for firing or burning bricks or clay ware the flues from a series of
furnaces or combustion chambers are similarly connected so that one furnace may be
fully charged with fuel and the products of combustion from it led to and through
the adjoining furnaces which are charged to a less extent with fuel, valves or
dampers being provided to direct the gases to any of the furnaces. A main
flue may be carried transversely of the furnaces at either or both ends and furnished
with valves or dampers by the use of which the products of combustion from any of
the furnaces may be led to any other of the series irrespective of any of the
furnaces being disconnected for repair.
Dated this 26th day of June 1893.
CRUIKSHANK & FAIRWEATHER,
62, St. Vincent Street, Glasgow, Agents.
Improvements in the Arrangement or Construction of Flues for
Boiler and other Furnaces.
I, THOMAS GARDNER, of Kirkland's Land, Newmains, in the County of Lanark,
Contractor, 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 :-
This invention has for its object to economise fuel in boiler and other furnaces by
improved arrangements of the furnace flues and dampers whereby the fire gases are
led from one furnace or combustion chamber working at full power to and through

page_text: others in which smaller supplies of solid liquid or gaseous fuel are consumed the
surplus heat from the first furnace being used to reinforce the heat power in the
other furnaces or combustion chambers.
In carrying out the invention as applied to boiler furnaces the fire gases passing
through the boiler flues in the case of Lancashire boilers as illustrated in part front
elevation and part vertical section by Figure 1 of the accompanying drawings or
under the boiler in the case of egg-ended or other externally fired boilers are
brought either through a specially built flue or one of the existing flues a which is
disconnected by a damper from the chimney. The fire gases are then led backwards
through a side flue b forward through a flue c and into a cross flue d shewn in dotted
lines at Figure 1 said flue d directing the gases under the fire bars of an adjoining
boiler in which is a fire insufficient in itself to maintain the boiler under steam and
thence the whole fire gases are led through the flues under the second boiler either
direct to the chimney or through a third boiler furnace, similarly underfired, on
their way to the chimney, suitable dampers being provided so that any one of the
boilers may be fully fired and the resulting products of combustion led to and
through the adjoining boiler or boilers in any order desired.
In applying the invention to steel melting furnaces or to furnaces for heating gas
or oil retorts or for firing or burning bricks or clay ware as illustrated in vertical
section by Figure 2, and in horizontal sections of the lower and upper flues
respectively at Figures 3 and 4 a set of flues e in addition to the usual flues fis
provided through which the fire gases from the furnace or furnaces travel before
passing to the chimney flue g the purpose of these flues being to more thoroughly
heat the floor of the kiln. The flues g from a series of furnaces or combustion
chambers are connected to a main flue / carried transversely of the furnace at either
or both ends and furnished with valves or dampers so that one furnace may be fully
charged with fuel and the products of combustion from it led to and through the
adjoining furnaces which are charged to a less extent with fuel and so that the
products of combustion from any one of the furnaces may be led to any other
of the series irrespective of any of the furnaces being disconnected for repair.
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 boiler or other furnaces the arrangement of flues substantially as and for the
purpose set forth with reference to the annexed drawings.
Dated this 24th day of March 1894.
CRUIKSHANK & FAIRWEATHER,
62, St. Vincent Street, Glasgow, Agents.