IMPROVEMENTS IN THE CONSTRUCTION OF BOILERS FOR HEATING WATER OR PROVISIONAL SPECIFICATION
Year: 1882

page_text: LETTERS PATENT to William Henry Thompson of Queen Square Leeds
Plumber Louis Hardaker of Grace Street Leeds Temple Maker and
John Megson Porter of Ebor Place Leeds Architect for an Invention of
IMPROVEMENTS IN THE CONSTRUCTION OF BOILERS FOR HEATING WATER OR
PROVISIONAL SPECIFICATION left by the said William Henry Thompson,
Louis Hardaker, and John Megson Porter at the Office of the Commissioners
of Patents on the 16th October 1882.
WILLIAM HENRY THOMPSON, of Queen Square, Leeds, Plumber, LOUIS
HARDAKER, of Grace Street, Leeds, Temple Maker, and JOHN MEGSON PORTER,
of Ebor Place, Leeds, Architect, "IMPROVEMENTS IN THE CONSTRUCTION OF
BOILERS FOR HEATING WATER OR GENERATING STEAM BY GAS OR OTHER FUEL,"
The object of our said improvements is to construct boilers for heating water or
for generating steam in such a manner as to provide large heating surfaces for
absorbing the heat arising from combustion, and thereby economise fuel.
We construct such boilers of a cylindrical form, and with concentric cylindrical
flues. Each complete boiler consisting of two, three or more annular portions,
placed one within the other.
The outer shell of each annular portion, or the inner shell of each annular
portion, is sometimes constructed of corrugated metal.
In some cases we construct both the inner and outer shells of each portion of
plain, cylindrical metal, without corrugations. In other cases we vary the use of
the corrugated shells and flues both in the inner and outer portions of boilers.
The boilers may be set either horizontally or vertically, and the corrugations may
be formed longitudinally or transversely to the length of the boiler: the latter
being always necessary where steam pressure is required.
One or more of the portions of such boilers may be divided into segmental
portions, the several segments of which, when fixed, become portions of the annular
formations before mentioned.
In constructing and setting a horizontal boiler we place the outer annular portion
of the boiler, (whether formed of one annular cylinder, or of segments, forming
together such annular cylinder) over a furnace and in a circular flue concentric with
and entirely surrounding the sides and crown: such flue being constructed of

page_text: I
ordinary refractory materials. The corrugated plates of the outer shell are in
contact with the masonry of the flue, and the spaces between the corrugations form
annular flues on each side of the boiler, meeting at the top.
Concentrically with and inside the central flue of such outer portion, a smaller,
but similarly formed boiler, or portion of a boiler, is placed, and inside this latter
again a still smaller boiler, or portion of a boiler, is placed: the outer corrugated
shell of each being in contact with the cylindrical plain flue of the larger portion,
and thereby forming a great number of small flues for distributing, breaking up,
and absorbing the heat from the gases.
Where the cylindrical shells are complete cylinders, and not in segments, suitable
short tubes are inserted into the upper or lower portions thereof, in order to allow
the heated gases to pass from one to another. But where the boiler is constructed
in segments, the passage of the gases may take place through suitable spaces con-
veniently left between such segments. In other cases the gases may be conducted
downwards past the ends of each portion alternately, by means of suitable flues
formed in the masonry.
The general arrangement will therefor be understood to be as follows:-The heat
first impinges upon the lower plates of the largest of the concentric portions of the
boiler here it becomes divided, the gases passing up each side thereof, between
the corrugations, to the top the gases then descend through the short tubes, in
the upper portion, or through the longitudinal slot between the upper segments (as
the case may be) to the crown of the next (inner) concentric portion of the boiler:
liere the currents of the heated gases are again divided and pass downwards on
each side thereof to the lowest part: here the currents pass upwards through short
tubes or a longitudinal slot (as the case may be) to the lower plates of the innernost
concentric portion of the boiler, round which it passes to the top: here the currents
again pass downwards as before to the central flue, from whence they are carried
to the chimney. This description applies to boilers constructed of three concentric
portions, but we do not confine ourselves to that or any number, although we prefer
such construction as it is well adapted to absorb the heat arising from the furnace,
and furnishes a large amount of heating surface.
; We sometimes arrange the same in semi-cylindrical portions: each of the semi-
cylindrical portions being concentric with, the others; suitable flues being formed
by means of masonry in order to compel the heated gases to follow the proper
course, analogous to that above described.
Suitable pipes are fitted to the various portions of the boiler in order to supply
feed water thereto and to insure the circulation of the water.
The corrugated plates may be arranged either to the outer circumferences of the
several portions or to the inner circumferences thereof; and in the latter case the
masonry is so constructed round the outer portion as to provide equivalent parallel
channels on each side thereof for the passage of the heated gases.
Our improved boilers may be placed vertically, instead of horizontally, and in
some cases the corrugations may be longitudinal to the boiler instead of transverse
thereto.
"Our improved boilers, when used for heating water only, for horticultural and
other analogous purposes, do not require gussets or stays, but when used for
purposes of high pressure steam, suitable arrangements are made to prevent rupture
of the plates. In the latter case also suitable steam chests are provided to collect
and separate the steam from the water, and provent priming. Also the ordinary
boiler fittings are provided; as usual.
Instead of corrugated plates we sometimes adopt plain metal plates and form the
fluo channels by means of angle iron, T iron, or firebrick, arranged as a substitute
for. the corrugations, and the channels thereby formed."
The fuel may be gas, coal, coke, or any other suitable form of combustible.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent and
of an Order of the Lord Chancellor filed by the said William Henry
Thompson, Louis Hardaker and John Megson Porter in the Great Seal Patent
Office on the 24th April 1883.
WILLIAM HENRY THOMPSON of Queen's Square Leeds Plumber LOUIS HARDAKER
of Grace Street Leeds, Temple Maker and JOHN MEGSON PORTER of Ebor Place,
Leeds, Architect - " IMPROVEMENTS IN THE 'CONSTRUCTION OF BOILERS
HEATING WATER OR GENERATING STEAM BY GAS OR OTHER FUEL"
FÖR
The object of our said improvements is to construct boilers for heating water
or for generating Steam in such a manner as to provide large heating surfaces
for absorbing the heat arising from combustion and thereby economise fuel.
We construct such boilers of a cylindrical form, and with concentric cylindrical
flues. Each complete boiler consisting of two, three or more annular portions,
placed one within the other.
The outer shell of each annular portion, or the inner shell of each annular
portion, is sometimes constructed of corrugated metal.
In some cases we construct both the inner and outer shells of each portion of
plain, cylindrical metal, without corrugations. In other cases we vary the use of
the corrugated shells and flues both in the inner and outer portions of boilers...
The boilers may be set either horizontally or vertically, and the corrugations
may be formed longitudinally or transversely to the length of the boiler: the
latter being always necessary where steam pressure is required.
One or more of the portions of such boilers are sometimes divided into segmental
portions, the several segments of which, when fixed, become portions of the annular
formations before mentioned.
In constructing and setting a horizontal boiler we place the outer annular portion
of the boiler (whether formed of one annular cylinder, or of segments, forming
together such annular cylinder) over a furnace and in a circular flue concentric
with and entirely surrounding the sides and crown: such flue being constructed of
ordinary refractory materials. The corrugated plates of the outer shell are in
contact with the masonry of the flue, and the spaces between the corrugations
form annular flues on each side of the boiler meeting at the top.
Concentrically with and inside the central flue of such outer portion, a smaller,
but similarly formed boiler, or portion of a boiler, is placed, and inside this latter
again a still smaller boiler, or portion of a boiler, is placed the outer corrugated
shell of each being in contact with the cylindrical plain flue of the larger portion,
and thereby forming a great number of small flues for distributing, breaking up,
and absorbing the heat from the gases.
Where the cylindrical shells are complete cylinders, and not in segments, suitable
short tubes are inserted into the upper or lower portions thereof, in order to allow
the heated gases to pass from one to another. But where the boiler is constructed
in segments, the passage of the gases may take place through suitable spaces
conveniently left between such segments. In other cases the gases may be conducted
downwards past the ends of each portion alternately, by means of suitable flueś
formed in the masonry...
The general arrangement will therefore be understood to be as follows:-The
heat first impinges upon the lower plates of the largest of the concentric portions
of the boiler: here it becomes divided; the gases passing up each side thereof
between the corrugations, to the top: the gases then descend through the short
tubes, in the upper portion, or through the longitudinal slot between the upper

page_text: segments (as the case may be) to the crown of the next (inner) concentric portion
of the boiler: here the currents of the heated gases are again divided and pass down-
wards on each side thereof to the lowest part: here the currents pass upwards through
short tubes or a longitudinal slot (as the case may be) to the lower plates of the
innermost concentric portion of the boiler, round which it passes to the top: here
the currents again pass downwards as before to the central fluo, from whence they
are carried to tho chimney. This description applies to boilers constructed of
three concentric portions, but we do not confine ourselves to that or any number,
although we prefer such construction as it is well adapted to absorb the heat
arising from the furnace, and furnishes a large amount of heating surface.
We sometimes arrange the same in semi-cylindrical portions: each of the semi-
cylindrical portions being concentric with the others; suitable flues being formed
by means of masonry in order to compel the heated gases to follow the proper
course, analogous to that above described.
Suitable pipes are fitted to the various portions of the boiler in order to supply
feed water thereto and to insure tlie circulation of the water.
The corrugated plates may be arranged either to the outer circumferences of the
several portions or to the inner circumferences thereof; and in the latter case the
masonry is so constructed round the outer portion as to provide equivalent parallel
channels on each side thereof for the passage of the heated gases.
Our improved boilers are sometimes placed vertically; instead of horizontally, and
in some cases the corrugations may be longitudinal to the boiler instead of transverso
thereto.
Our improved boilers, when used for heating water only, for horticultural and
other analogous purposes, do not require gussets or stays, but when used for
purposes of high pressure steam, suitable arrangements are made to prevent rupture
of the plates. In the latter case also suitable steam chests are provided to collect
and separate the steam from the water, and prevent priming. Also the ordinary
boiler fittings are provided, as usual.
Instead of corrugated plates we sometimes adopt plain metal plates and form
the flue channels by means of angle iron, T iron or firebrick, arranged as a
substitute for the corrugations, and the channels thereby formed.
The fuel may be gas, coal, coke, or any other suitable form of combustible.
Having thus particularly described and ascertained the nature of our said
invention, and the manner in which the same is to be performed, we claim :-
1. The manufacture and use of steam and other boilers with the special
arrangements of Divisional flues cylindrical segments and short tubes for dividing
the currents of heated gases, and providing a large ainount of heating and
absorbing surfaces, and the various combinations and modifications of such boilers
substantially as hercin before described.
2. The general construction, arrangement and combination of parts together
respectively forming our Improvements in Boilers for heating water or generating
steam by gas or other fuel and substantially as hercinbefore described.
In witness whereof I the said William Henry Thompson, on behalf of myself
and the said Louis Hardaker and John Megson Porter, have hereunto set
my hand and seal the 16th day of April in the year of our Lord One
thousand eight hundred and eighty three.