IMPROVEMENTS IN HOT WATER BOILERS AND STEAM GENERATORS
Year: 1883

page_text: LETTERS PATENT to John Collier Boiler Maker and Michael Holroyd Smith,
Consulting and Mechanical Engineer both of Halifax in the County of York
for an Invention of "IMPROVEMENTS IN HOT WATER BOILERS AND STEAM
GENERATORS."
PROVISIONAL SPECIFICATION left by the said John Collier and Michael
Holroyd Smith at the Office of the Commissioners of Patents on the 9th June
1883.
JOHN COLLIER, Boiler Maker, and MICHAEL HOLROYD SMITH, Consulting and
Mechanical Engineer both of Halifax in the County of York "IMPROVEMENTS IN
HOT WATER BOILERS AND STEAM GENERATORS "
This invention relates to vertical cylindrical boilers for heating water or
generating steam so designed as to afford great facilities for constructing or putting
together its parts-large capacity of furnace and heating surface-full and con-
venient access to its fire flue or flues for the purpose of cleaning, repairing and
replacing the same.
One construction of boiler according to this our said Invention consists of a
vertical cylindrical boiler with dome topped fire box having its sides forming the
outer and inner shell or waterway connected by means of two concentric tubes, the
space between the two tubes being a waterway-the interior of the inner tube
forming a fire flue-The concentric tubes are placed across the furnace preferably
at an angle or incline so as to secure free circulation of the water and also provide
convenient room underneath it for the fire door at one side of the Boiler and the
smoke outlet above it. at the opposite side-The exit or aperture for the heated
gases is formed near the crown of the furnace and such exit and also the open end
of the fire tube are covered and enclosed by an outer casing forming a combustion
chamber the other and opposite end of the fire tube is enclosed by means of an
outer smoke box in connection with which is the funnel or chimney-The combus-
tion chamber and the smoke box are each fireclay lined and provided with doors so
that when the latter are open there is a free and un-obstructed way through the fire
tube for cleaning repairing or replacing the tube-The course of the flame and

page_text: heated gases is from the fire grate to and around the cross tubular waterway.
thence to the crown of the furnace and by way of the outlet already named to the
combustion chamber thence to the fire flue formed by the interior one of the
concentric tube and to the smoke box. and funnel or chimney
If desirable an extended course for the flame and heated gases may be obtained
by the use of an inclined baffler plate placed within the furnace box the outlet
being behind the said plate so that the flame passes upward from the grate to and
around a portion of the cross waterway tube to the crown of the fire box thence
downwards and so again across the other portion of the waterway tube to the back
of the inclined baffler plate and through the outlet to the combustion chamber,
thence to and along the fire tube to the smoke box and chimney on the opposite
side
In some cases in lieu of the Cylindrical cross waterway and one main fire tube
within the same we employ (in cross section) one or more cylindrical elliptical or
other shaped cross waterway tubes or waterways and have two or more longitudinal
fire flues therein.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said John Collier and Michael Holroyd Smith in the Great Seal Patent
Office on the 8th December 1883.
.
JOHN COLLIER Boiler Maker and MICHAEL HOLROYD SMITH Consulting and
Mechanical Engineer both of Halifax in the County of York " IMPROVEMENTS IN
HOT WATER BOILERS AND STEAM GENERATORS
"
This Invention relates to vertical cylindrical Boilers for heating water or
generating steam so designed as to afford great facilities for constructing or
putting together its parts-large capacity of furnace and heating surface-full and
convenient access to its fire flue or flues for the purpose of cleaning repairing and
replacing the same.
One construction of Boiler according to this our said Invontion consists of a
vertical cylindrical Boiler with dome-topped fire box having its sides forming the
outer and inner shell or waterway connected by means of two concentric tubes, the
space between the two tubes being a waterway-the interior of the inner tube
forming a fire flue-The concentric tubes are placed across the furnace preferably
at an angle or incline so as to secure fire circulation of the water and also provide
convenient room underneath it for the fire door at one side of the Boiler and the
smoke outlet above it at the opposite side-The exit or aperture for the heated
gases is formed near the crown of the furnace and such exit and also the open end
of the fire tube are covered and enclosed by an outer casing forming a combustion
chamber the other and opposite end of the fire tube is enclosed by means of an
outer smoke box in connection with which is the funnel or chimney-The com-
bustion chamber and the smoke box are each fire clay lined and provided with
doors so that when the latter are open there is a free and unobstructed way through
the fire tube for cleaning-repairing or replacing the tube-The course of the flame
and heated gases is from the fire grate to and around the cross tubular waterway―
thence to the crown of the furnace and by way of the outlet already named to
the combustion chamber thence to the fire flue formed by the interior one of the
concentric tubes and to the smoke box and funnel or chimney.
If desirable an extended course for the flame and heated gases may be obtained
by the use of an inclined baffler plate placed within the furnace box the outlet
being behind the said plate so that the flame passes upwards from the grate to
and around a portion of the cross waterway tube to the crown of the fire box
thence downwards and so again across the other portion of the waterway tube to
the back of the inclined baffler plate and through the outlet to the combustion
chamber-thence to and along the fire tube to the smoke box and chimney on the
opposite side.
In some cases in lieu of the cylindrical cross waterway and one main fire tube
within the same we employ (or cross section) one or more cylindrical elliptical or
other shaped cross waterway tubes or waterways and have two or more longitudinal
fire flues therein
Such being the nature and object of this our said invention we will now proceed
to describe the same in detail and in order that the invention may be fully under-
stood we have hereunto annexed sheet of drawings and have marked the same
with foures of rafonaries

page_text: connected by means of two concentric tubes 2. 3 the space between the two tubes
being a waterway 4-the interior of the inner tube forming a fire flue 5-The
concentric tubes 2. 3. are placed across the furnace preferably at an angle or incline
so as to secure free circulation of the water and also provide convenient room
underneath it for the fire door 6 at one side of the Boiler and the smoke outlet 7
above it at the opposite side-The exit or aperture for the heated gases is formed
near the crown of the furnace at 8 and such exit and also the open end 9 of the
fire tube are covered and enclosed by an outer casing forming a combustion
chamber 10 the other and opposite end of the fire tube is enclosed by means of an
outer smoke box 11 in connection with which is the funnel or chimney 12-The
combustion chamber 10 and smoke box 11 are each fire clay lined as shewn at 13
provided with doors 14 so that when the latter are open there is a free and
unobstructed way through the fire tube for cleaning, repairing or replacing the
tube The course of the flame and heated gases is from the fire grate to and around
the cross tubular water way-thence to the crown of the furnace and by way of the
outlet already named to the combustion chamber thence to the fire flue formed by
the interior one of the concentric tubes and to the smoke box and funnel or chimney
as shewn by the line of arrows,
If desirable an extended course for the flame and heated gases may be obtained
by the use of an inclined baffler plate 15 placed within the furnace box the outlet
being behind the said plate so that the flame passes upwards from the plate to
and around a portion of the cross waterway tube to the crown of the fire box
thence downwards and so again across the other portion of the waterway tube to
the back of the inclined baffler plate and through the outlet to the combustion
chamber, thence to and along the fire tube to the smoke box and chimney on the
opposite side, as shewn by arrows and at Fig 3.
Another construction comprises in some cases in lieu of the cylindrical cross
waterway and one main fire tube within the same we employ (or cross section) one
or more cylindrical elliptical or other shaped cross waterway tubes or water-
ways 16 as illustrated by Figs 4. 5. 6. 7 and have two or more longitudinal fire
flues 17 therein-apertures are formed at the two parts marked C. D for intro-
duction of scraper for removing incrustation or mud from the outsides of the cross
tubes. as shewn by drawing Fig. 8-9
Having thus fully described the nature and particulars of this our said invention
together with the manner in which the same is to be performed or carried into
practical effect we would have it understood that we claim
The construction of boilers for purposes referred to in the manner herein
described and as illustrated by the drawings
In Witness whereof I the said Michael Holroyd Smith for and on behalf of
myself and the said John Collier have hereunto set my hand and seal this
seventh day of December in the year of our Lord one thousand eight hundred and
eighty three
Witness
WALTER BRIERLEY
Patent Agent
Halifax & Huddersfield
M. HOLROYD SMITH. (L.S.)