Year: 1887

page_text: Date of Application, 7th June, 1887
Complete Left, 9th Apr., 1888
Complete Accepted, 11th May, 1888
We, WILLIAM AMBLER, Patent Agent, and WILLIAM OWEN BLACKBURN, Chartered
Accountant, both of Bradford, in the County of York, do hereby declare the nature
of the said Invention, to be as follows:-
This Invention is especially applicable to that class of stationary boilers known as
Lancashire or Cornish boilers which are constructed with tubular fire boxes and flues.
Various forms of such boilers have been formerly constructed, but as most generally
made, the main flue is adapted or fitted with water tubes which cross the flue in
various directions, their purpose of utility being to cause a general circulation of the
water, and an increased production of steam. In another form of such boilers a
plain longitudinal water tube has been disposed within the main flue concentrically
therewith, such tube being connected with the water in the main boiler surrounding
the flue by means of cross tubes passing through the flue, but as hitherto constructed
and disposed such arrangement has not been of any practical utility, as the additional
amount of heating surface is comparatively small, and the disposition of the said
tubes has allowed of the flame floating along the upper part of the flue without any
material portion thereof being deflected to the lower part of the flue, and consequently
a considerable portion of the heating effect is wasted.
The special objects of the present Invention are, to obviate such defects, and to
obtain a better circulation of the water, and an increased amount of heating surface
in a boiler of a given size, and to cause an improved distribution of the flame in the
flue in its passage therethrough.
We attain such objects by constructing the main flue in sections of a corrugated
formation united by sections of a plain cylindrical formation, and by fitting therein
an auxiliary boiler tube also of a combined corrugated and plain tubular formation,
applying the auxiliary boiler longitudinally of the flue and nearer to the upper part
or apex thereof than to the lower part thereof, and placing such auxiliary boiler in
communication with the water in the main boiler surrounding the flue, by means of
short connecting tubes which preferably lead from upper and lower parts of the plain
cylindrical parts of the auxiliary boiler through the flue to opposite parts of the plain

page_text: cylindrical parts of the flue, and which are thus rendered effective in causing an
efficient circulation of the water in the main boiler through the auxiliary boiler.
The peculiar formation of the said flue and contained auxiliary boiler and the
disposition of the latter within the former, cause the flame passing along the upper
part of the flue to be obstructed and deflected and compel it to pass around and below
the said auxiliary boiler, and into useful contact with the lower portion of the fluc,
and by such means a better distribution of the flame is obtained.
To assist in effecting the complete combustion of the furnace gases we admit a
limited quantity of air by one or more small tubes leading from the outside of the
fire box front immediately under the upper part or apex of the fire box to a position
beyond the bridge, and which air in its passage along the said tube or tubes gets
thoroughly heated before it admixes with the said furnace gases.
Dated this 3rd day of June 1887.
DAY, DAVIES & HUNT,
321, High Holborn, London, W.C.,
Agents for the Applicants.

page_text: Improvements in or relating to Steam Boilers.
We, WILLIAM AMBLER, Patent Agent, and WILLIAM OWEN BLACKBURN, Chartered
Accountant, both of Bradford, in the County of York, do hereby declare the nature
of our said 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 is especially applicable to that class of stationary boilers known
as Lancashire or Cornish boilers which are constructed with tubular fire boxes and
flues. Various forms of such boilers have been formerly constructed, but as most
generally made, the main flue is adapted or fitted with water tubes which cross the
Hlue in various directions, their purpose of utility being to cause a general circulation of
the water, and an increased production of steam. In another form of such boilers a plain
longitudinal water tube has been disposed within the main flue concentrically therewith,
such tube being connected with the water in the main boiler or surrounding the flue
by means of cross tubes passing through the flue, but as hitherto constructed and
disposed such arrangement has not been of any practical utility, as the additional
amount of heating surface is comparatively small, and the disposition of the said tubes
has allowed of the flame floating along the upper part of the flue without any material
portion thereof being deflected to the lower part of the fluc, and consequently a
considerable portion of the heating effect is wasted.
The special objects of the present Invention are, to obviate such defects, and to
obtain a botter circulation. of the water and an increased amount of heating surface in
a boiler of a given size, and to cause an improved distribution of the flame in the
flue in its passage therethrough.
We attain such objects in the manner represented on the annexed drawings, in
which Fig. 1 represents a longitudinal vertical section, and Fig. 2 a transverse vertical
section of a steam boiler constructed in accordance with our improvements, by
constructing the main flue, 3, in sections, 4, of a corrugated forination united by
sections, 5, of a plain cylindrical formation, and by fitting therein an auxiliary
cylindrical or conical boiler-tube, 6, also of a combined corrugated, 7, and plain, 8,
tubular formation; applying the auxiliary boiler, 6, longitudinally of the flue, 3,
and nearer to the upper part or apex thereof than to the lower part thereof, and
placing such auxiliary boiler in communication with the water in the main boiler, 9,
surrounding the flue, 3, by means of short connecting tubes, 10, which preferably
lead from upper and lower parts of the plain tubular parts of the auxiliary boiler
through the flue to opposite parts of the plain cylindrical parts of the flue, and which
are thus rendered effective in causing an efficient circulation of the water in the main
boiler through the auxiliary boiler.
The peculiar formation of the flue, 3, and contained auxiliary boiler, 6, and the
disposition of the latter within the former, cause the flame passing along the upper
part of the flue to be obstructed and deflected and compel it to pass around and below

page_text: the said auxiliary boiler, and into useful contact with the lower portion of the flue,
and by such means a better distribution of the flame is obtained.
To assist in effecting the complete combustion of the furnace gases we admit a
limited quantity of air by one or more small tubes, 14 leading from the outside of
the fire box front, 11, immediately under the upper part or apex of the fire box, 12,
to a position beyond the bridge, 13, and which air in its passage along the said
tube or tubes gets thoroughly heated before it admixes with the said furnace
gases.
Having now particularly described and ascertained the nature of our said Invention,
and in what manner the same is to be performed, we declare that what we
claim is :-
The hereinbefore described improvements in or relating to steam boilers, the same
consisting in constructing the main flue in sections of a corrugated formation united
by sections of a plain cylindrical formation, fitting therein an auxiliary cylindrical or
conical boiler tube also of a combined corrugated and plain tubular formation, applying
the auxiliary boiler longitudinally of the flue and nearer to the upper part or
apex thereof than to the lower part thereof, and placing such auxiliary boiler in
communication with the water in the main boiler surrounding the flue by short
connecting tubes which preferably lead from upper and lower parts of the plain
tubular parts of the auxiliary boiler through the fluo to opposite parts of the plain
cylindrical parts of the flue, substantially as hereinbefore described.
DAY, DAVIES & HUNT,
321, High Holborn, London, W.C.,
Agents for the Applicants.
DAY, DAVIES & HUNT,
321, High Holborn, London, W.C.,
Agents for the Applicants.