Improvements in Steam Generators or Boilers.
Year: 1896

page_text: Date of Application, 17th Feb., 1896
Complete Specification Left, 17th Nov., 1896-Accepted, 9th Jan., 1897
Improvements in Steam Generators or Boilers.
1, WILLIAM JOHN JOBLING, of Akenside Hill, in the City and County of
Newcastle-upon-Tyne, Engineer, do hereby declare the nature of this invention to
be as follows:-
My invention relates to the application of water tubes to steam generators of
various types as marine, locomotive, or stationary and of horizontal or vertical
arrangement, and consists in substituting, for the ordinary fire tubes, water tubes
disposed in such manner, according to the type of boiler, as to obtain the advantages
of a water tube boiler, in combination with the ordinary types, in certain modified
forms of construction.
In a marine boiler of the multitubular return tube type I substitute for the fire
tubes a large horizontal flue leading from the combustion chamber to about 12 inches
of the front and introduce water tubes opening into the lower water spaces through
the sides, bottoms and backs (or any of such parts) of the combustion chamber and
bent or shaped so as to traverse vertically the interior of the combustion chamber
and horizontally, or inclining upward, the flue which replaces the fire tubes and
open into the water space near the water level forming clusters of water tubes
around and between which the flame and gases from the furnace traverse and pass
into the smoke box through a flue or flues, or through small tubes, on their way to
the chimney.
In locomotive boilers the water tubes will be bent or shaped to lead vertically
from the water spaces around the fire box (or any of such water spaces) through
the interior of the furnace, above the grate bars, and then traverse horizontally,
or inclining upward, the flue which replaces the fire tubes and open into the water
space above it the flame and gases passing into the smoke box after having imparted
their heat to the clusters of water tubes.
In stationary horizontal boilers of the "Cornish " or "Lancashire "
water tubes will open into the water space through the lower half of the flue
types the
behind the furnace bridge and after traversing the flue horizontally, or inclining
upward, will open through the upper half of the flue into the water space.
In vertical types, either for main, auxiliary or donkey boilers, the water tubes
will open, above the grate, into the bottom water space around the furnace which
will be of suitable size to enable their ends to be properly fitted and secured
through openings, fitted with doors, in the shell and passing vertically in circles
around the sides of the furnace or fire box will open through the furnace crown
into the upper water space the flame and gases, having imparted their heat to the
water tubes, passing through a flue or flues, or through small tubes, to the chimney.
Provision will be made in all types of boilers for the insertion of the bent or
shaped water tubes and for access to their ends to secure them in the plates and for
examination or repairs either direct from the space into which they open or, when
necessary in contracted water spaces, by means of removable doors over manholes or
hand holes suitably disposed.
The fuel to be used in such water tube generators may be coal, coke, gas, any of
the liquid fuels, sprayed or otherwise, or the inflammable gas of any of the mineral

page_text: or other oils and I consider the generators, in certain forms, for such latter fuel,
compressed or otherwise, specially adapted for road vehicles known as "auto-cars."
Dated this 17th day of February 1896.
"
W. LLOYD WISE,
46 Lincoln's Inn Fields, London, W.C., Chartered Patent Agent.
Improvements in Steam Generators or Boilers.
I, WILLIAM JOHN JOBLING, of Akenside Hill, in the 'City and County of
Newcastle-upon-Tyne, Engineer, 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 :-
My invention relates to the application of water tubes to steam generators of
various types as marine, locomotive, or stationary, and of horizontal or vertical
arrangement, and consists in substituting, for the ordinary fire tubes, water tubes
disposed in such manner, according to the type of boiler, as to obtain the advantages
of a water tube boiler, in combination with the ordinary types, in certain modified
forms of construction.
In a marine boiler of the multitubular return tube type I substitute for the fire
tubes a large horizontal flue leading from the combustion chamber to about 12 inches
of the front and introduce water tubes opening into the lower water spaces through
the sides, bottoms and backs (or any of such parts) of the combustion chamber and
bent or shaped so as to traverse vertically the interior of the combustion chamber,
and horizontally, or inclining upward, the flue which replaces the fire tubes, and
open into the water space near the water level, or straight horizontal tubes
traversing the flue from end to end, forming clusters of water tubes around and
between which the flame and gases from the furnace traverse and pass into the
smoke box through a flue or flues, or through small tubes, on their way to the
chimney.
In locomotive boilers the water tubes will be bent or shaped to lead vertically
from the water spaces around the fire box (or any of such water spaces) through
the interior of the furnace, above the grate bars, and then traverse horizontally, or
inclining upward, the flue which replaces the fire tubes and open into the water
space above it, or straight horizontal tubes traversing the flue from end to end, the
flame and gases passing into the smoke box after having imparted their heat to the
clusters of water tubes.
In stationary horizontal boilers of the Cornish or Lancashire types the water
tubes will open into the water space through the lower half of the flue behind the
furnace bridge and after traversing the flue horizontally, or inclining upward, will
open through the upper half of the flue into the water space.
In vertical types, either for main, auxiliary, (or "donkey") boilers the water
tubes will open, above the grate, into the bottom water space around the furnace
which will be of suitable size to enable their ends to be properly fitted and secured
through openings, fitted with doors, in the shell, or by constructing the fire box so
as to be withdrawn from the shell, and passing vertically in circles around the sides
of the furnace or fire box will open through the furnace crown into the upper water
space the flame and gases, having imparted their heat to the water tubes, passing
through a flue or flues, or through small tubes to the chimney.
Provision will be made in all types of boilers for the insertion of the bent or
shaped water tubes and for access to their ends to secure them in the plates, and

page_text: for examination or repairs, either direct from the space into which they open or
when necessary in contracted water spaces, by means of removable doors over
manholes or hand holes suitably disposed.
The fuel to be used in such water tube generators may be coal, coke, gas, any of
the liquid fuels, sprayed or otherwise, or the inflammable gas of any of the mineral
or other oils, and I consider the generators, in certain forms, for such latter fuel,
compressed or otherwise, specially adapted for road vehicles known as "auto-cars."
DESCRIPTION OF DRAWINGS.
On the accompanying sheet my invention is shewn in some of the various forms
in which I now propose to carry it into practical application. The figs. are all
drawn to an approximate scale of half an inch to a foot, and the same letters of
reference indicate the same or equivalent parts on all the figs.
Figs. 1 and 2 shew the application to a marine type of boiler with two
furnaces.
Figs. 3 and 4 shew it as applied to a boiler of the locomotive type, and Figs. 5
and 6 as applied to a boiler of the vertical type, such as for auxiliary (or
donkey ") boilers but adapted also to large boilers of vertical type.
Only those portions of the boiler in each case are indicated by reference letters,
the shells, furnaces, and combustion chambers being of the ordinary construction
except as to certain details.
Referring to Figs. 1 and 2, the former being a section through the line a-b of
Fig. 2. The ordinary fire tubes are replaced by a fire flue F. F. extending from front
to back between the tube plates T. P. and leading by the fire tubes F. T. into the smoke
box at front end. W. T. are the water tubes extending through the tube plates T. P.
and therein secured, and into the water spaces W. S. at each end. At the back
and front of the shell are access doors A. D. bolted to the shell and stayed by
bar stays S. the nuts of which being removed allow the doors to be taken off and
access obtained to the water tube ends. The front access door which receives
the ends of the fire tubes F. T. can be removed by unscrewing the outer nuts N.
without disturbing the fire tubes. Baffle plates B. P. will be inserted in the
combustion chambers to direct the course of the flame and gases so as to cause
them to impart their heat to the water tubes before escaping into the smoke box
and chimney. The strong dotted lines on Fig. 1 and on the right of Fig. 2 shew
an arrangement of sinuous water tubes W. T. opening from the lower water spaces
at the sides of the combustion chambers and proceeding vertically upward and
then horizontally along the fire flue F. F. and curving upward opening out into
the water space above the flue. By this arrangement an increased heating surface
is obtained and access to the lower ends of the water tubes in the combustion
chamber will be provided for by doors in the shell at the wings and by the space
between the combustion chambers being made sufficient for a workman to get at
the tube ends from inside the boiler or all the groups of water tubes may lead
from the wing water spaces above so that doors on the shell will give access to
their ends.
Referring to the locomotive type of boiler, Figs. 3 and 4 the construction is
practically the same the fire flue F. F. replacing the small fire tubes extending
from the tube plate T. P. of the fire box to another front tube plate T. P. and a
fire tube F. T. leading into the smoke box and access doors A. D. being provided
to open out the ends of the water tubes W. T. where they join the water
spaces W.S. The water tubes in this case may be arranged sinuously as in
Figs. 1 and 2, opening out into the lower water spaces round the fire box proceeding
vertically upward and then horizontally along the fire flue F. F. aud curving
upward opening into the water space above the flue access doors being provided
in the shell to their lower ends.
Referring to Figs. 5 and 6, the fire box is in this case so arranged as to be
removable bodily from the shell by taking off the nuts N. from the tops of the fire

page_text: tubes F. T. and from the bolts B. of the angle iron ring at bottom when the shell
can be lifted clear of the ends of the water tubes W. T. for access to their ends
and again replaced and the nuts and bolts screwed up, but in boilers of the type of
large size access doors may preferably be arranged round the shell.
The application of my invention to flue boilers of the Cornish or Lancashire
types or to combined flue and multitubular types I have not considered it necessary
to illustrate, as the verbal description herein before given will be readily understood
by engineers.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1st. The improvements in steam generators or boilers, consisting in the substi-
tution for fire tubes of fire flues, traversed by water tubes either sinuous, leading
from the lower level water spaces to the upper level water spaces, or by horizontal
tubes from one end water space to the other, thus forming a boiler of furnaces, fire
flues, and tubes in combination with water tubes, whereby the advantages of both
may be obtained, substantially as described and illustrated with reference to the
types of boilers to which my invention is specially applicable.
2nd. The combinations of parts comprising the improved steam generator or
boiler as shewn on Figs. 1 and 2, as of the marine type, on Figs. 3 and 4 as of the
horizontal type, and on Figs. 5 and 6 as of the vertical type.
Dated this 16th day of November 1896.
T. J. DANSON, F. Inst. P.A.,
Newcastle-upon-Tyne, Agent for Applicant.