Year: 1888

page_text: We, WILLIAM ACKROYD and THOMAS HENRY ACKROYD, both of Birkenshaw Mills,
Birkenshaw near Leeds, in the County of York, Manufacturers, do hereby declare the
nature of this invention, to be as follows:-
The object of my invention is to supply boiler furnaces with air at a high
temperature and so prevent loss of heat to the furnace, also, the inflammable products
of combustion are ignited and utilized so that no visable smoke passes from the
chimney.
For the above purpose we pass one or more tubes into the chimney, such tubes
being coiled therein or within a suitable chamber between the boiler and chimney.
The tube or tubes are then passed longitudinally through the interior of the boiler
and connected to the furnace flues at the front end thereof.
By this arrangement the air passes through the aforesaid tube or tubes to the boiler
furnace, and through the agency of the heated flue and steam or hot water in the
boiler it becomes intensely hot and is supplied to the fire at a bigh temperature
without creating a loss of heat thereto, and also the inflammable products of
combustion are more certain of ignition than when cold air is employed.
Dated this 10th dow of In1, 1888
J. W. HARDING,
Agent for the Applicants.

page_text: COMPLETE SPECIFICATION.
Improvements in the Means or Apparatus for Consuming Smoke and
Economising Fuel.
We, WILLIAM ACKROYD and THOMAS HENRY ACKROYD both of Birkenshaw Mills,
Birkenshaw Near Leeds in the County of York, Manufacturers, 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 :-
The object of our invention is to supply boiler furnaces with air at a high
temperature, and so prevent loss of heat to the furnace, also the inflamable products
of combustion are ignited and utilized so that no visable smoke passes from the
chimney.
In the accompanying drawings Fig 1 is a longitudinal section of boiler. Fig 2 a
vertical section of chimney, and Fig 3 a front elevation of boiler.
For the above purpose we pass one or more tubes A into the chimney B, such tube
or tubes being either coiled within the chimney or in suitable intermediate chamber,
and extended upwards in the chimney, or straight and extended upwards in the
chimney as shewn at C having an inlet D for air. The tube or tubes A then pass
through the boiler as shewn by dotted lines at E or through the flues as shewn at F
and thence out at the front of the boiler either through the front plate or brick work,
and thence through valve or opening G in the furnace door or doors H on to the fire
or fires.
By the above arrangement, the air passing through the aforesaid tube or tubes A in
the direction shewn by arrows and described above, such air becomes intensely hot
and is supplied to the fire or fires at a high temperature.
The above arrangement is applicable for consuming smoke and increasing the
draught in the furnaces of locomotives, steam boats, and other descriptions of furnaces,
also in the flues of refuse destructors.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :-
The means employed for supplying air at a high temperature to boiler and other
furnaces, for the purpose of consuming smoke and economizing fuel, substantially as
herein set forth.