IMPROVEMENTS IN MEANS AND APPLIANCES FOR HEATING STEAM AND OTHER BOILERS BY THE COMBUSTION OF GAS
Year: 1883

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 IMPROVE-
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 5th March 1883.
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 MEANS AND APPLIANCES FOR HEATING STEAM
AND OTHER BOILERS BY THE COMBUSTION OF GAS'
"
The object of our said invention is to heat steam and others boilers in an
economical and efficient manner, and without producing smoke thereby.
This invention is a further developement of a certain invention for which Letters
Patent were granted to us, dated the 16th October 1882 N° 4913, in the specification
whereof corrugated or parallel-channelled flues are described; and our present
invention is applicable to tubular, cylindrical, egg-ended, and other steam boilers,
and boilers for horticultural and analogous purposes.
In applying our said invention to a stationary tubular steam boiler, we set such
boiler upon a vertical wall running longitudinally under the centre and of sufficient
thickness to bear the whole weight of the boiler, and on each side and at each end
we build flues, for conveying the heat to the sides and through the tubes, and lastly
to the chimney or flue.
On one or both sides of the middle wall, we place Bunsen or other gas burners,
the flames from which pass upwards by parallel vertical, or nearly vertical channels,
to a longitudinal flue a little below the water level of the boiler. The heated gases
pass through this flue to one end, and then pass through a certain number of the

page_text: tubes to the other end, from whence they are conveyed to the first end, and then
are caused to pass through another set of tubes, or to a return flue, or to the
chimney. The number of traversings of the tubes and flues are varied according to
the size of the boiler and the number of tubes. The particular feature of the
invention being the division of the fire brick flues into a number of narrow flues
running transversely to the length of the boiler around a portion of the circum-
ference, and the heating of such flues by the combustion of gas.
In heating boilers for horticultural and other analogous purposes, which are
always kept full of water we sometimes construct the transverse flues so that they
meet at the top, and in other cases we cause the gases to take other routes before
passing away to the chimney. We also utilise any heat which would otherwise be
wasted in heating feed or incoming water before entering the boiler or the air, or
air and gas previously to combustion, by any of the well known means.
We construct the flues of fire-brick, and fill in behind and above such fire-brick
wool-slag, asbestos, felt or other nonconducting material, in order to prevent loss by
conduction and radiation:
We also sometimes fit steam boilers with automatic gas regulators, whereby the
pressure of the steam regulates the admission of gas to some or all of the burners,
so that if work is thrown off the engine, the rise in the steam pressure turns down
the
gas to a certain number of the burners; thereby economising fuel and preventing
the increase of steam pressure.
Suitable plates and bafflers are fitted to the flues to direct the currents in the
required direction.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said William Henry Thompson, Louis Hardaker, and John Megson
Porter in the Great Seal Patent Office on the 5th September 1883.
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 MEANS AND APPLIANCES FOR HEATING STEAM
AND OTHER BOILERS BY THE COMBUSTION OF GAS"
The object of our said invention is to heat steam and other boilers in an
economical and efficient manner and without producing smoke thereby
This invention is a further developement of a certain invention for which Letters
Patent were granted to us dated the 16th October 1882 N° 4913 in the specification
whereof corrugated or parallel channelled flues are described: and our present
invention is applicable to tubular cylindrical egg,-ended and other steam boilers,
and boilers for horticultural and analogous purposes
In applying our said invention to a stationary tubular steam boiler, we set such
boiler upon a vertical wall running longitudinally under the centre, and of sufficient.
thickness to bear the whole weight of the boiler, and on each side and at each end-
we build flues, for conveying the heat to the sides and through the tubes, and
lastly to the chimney or flue.
On one or both sides of the middle wall we place Bunsen or other gas burners
the flames from which pass upwards by parallel vertical or nearly vertical channels,
to a longitudinal flue a little below the water level of the boiler-The heated gases
pass through this flue to one end, and then pass through a certain number of the
tubes to the other end, from whence they are conveyed to the first end and then are
caused to pass through another set of tubes, or to a return flue or to the chimney
The number of traversings of the tubes and flues are varied according to the size
of the boiler and the number of tubes-The particular feature of the invention
being the division of the firebrick flues into a number of narrow flues running
transversely to the length of the boiler around a portion of the circumference, and
the heating of such flues by the combustion of gas.
In heating boilers for horticultural and other analogous purposes which are
always kept full of water, we sometimes construct the transverse flues so that they
meet at the top and in other cases we cause the gases to take other routes before
passing away to the chimney. We also utilize any heat which would otherwise be
wasted in heating feed or incoming water before entering the boiler, or the air, or
air and gas, previously to combustion by any of the well known means,
We construct the flues of fire brick and fill in behind and above such firebrick
wool slag, asbestos, felt or other nonconducting material in order to prevent loss by
conduction and radiation.
We also sometimes fit steam boilers with automatic gas regulators whereby the
pressure of the steam regulates the admission of gas to some or all of the burners
so that if work is thrown off the engine, the rise in the steam pressure turns down
the
gas to a certain number of the burners thereby economising fuel and preventing
the increase of steam pressure.
Suitable plates and bafflers are fitted to the flues to direct the currents in the
required direction
And in order that our said invention may be fully understood reference is hereby
made to the accompanying drawings in which similar letters of reference indicate
corresponding parts in the several figures
Fig 1 is an elevation, partly in section, of a combined double furnace and

page_text: multitubular boiler with double furnaces, in which furnaces are placed a series of
Bunsen or other gas burners b b as shewn The heated gases after traversing the
length of the furnace flues pass down to a number of tubes below the furnaces and
are thereby brought to the front from whence they pass down underneath the
boiler, from whence up again on each side through the divisional flues d d into two
flues e e and pass from thence to the general flue at the end of the boiler. C c are
hot air flues for heating the incoming air or gas, or both, by means of the
spare heat.
In applying the heat externally in the first instance the heated gases are passed
in the opposite direction vis from the outside underneath the boiler through the
divisional flues to the tubes in the centre backwards and forwards as shewn in
Fig 2. Fig 3 represents a hot water boiler for horticultural and analogous
purposes the heated gases passing round the outer shell through divisional flues to
the tubes in the centre and backwards and forwards.
:
Fig 4 also represents a hot water tubular boiler internally heated
In all these arrangements it will be seen that suitable plates bafflers (plain or
water way) and midfeathers marked a are used to direct the currents in the required
direction
.
Fig: 5 represents in section the form of the flues whereby the heated gases are
conducted round the sides of the boiler in corrugated or parallel channelled flues.
Having thus particularly described the nature of our said invention and in what
manner the same is to be performed, we claim :—
1 The heating of steam boilers by means of gas fuel internally fired, the use of
a combined double furnace and multitubular boiler with descending currents and
parallel channel flues substantially as described and shewn in Fig: 1 of the
drawings.
2. In the heating of steam boilers by means of gas fuel externally fired, the use
of tubes with return currents and parallel channel flues substantially as described
and shewn in Fig 2 of the drawings.
3 In the heating of hot water boilers by means of gas fuel the arrangements of
heating surface, return currents and parallel channel flues, substantially as described.
and shewn in Figs. 3 and 4 of the drawings.
4. The several arrangements and combination of parts together forming our
improvements in means and appliances for heating steam and other boilers by
the combustion of gas substantially as hereinbefore described and shewn on the
drawings.
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 this fourth day of September in the year of our Lord One thousand
eight hundred and eighty three.