Improvements in or connected with Steam Generators.
Year: 1899

page_text: PROVISIONAL SPECIFICATION.
Improvements in or connected with Steam Generators.
We, GEORGE FRANCIS GABRIEL DES VIGNES, Mechanical Engineer, of Zoffany
House, Strand-on-the-Green, Chiswick, and WALTER AMELIUS CLOUD, Engineer,
of Claremont Villa, Harvard Road, Gunnersbury, both in the County of Middle-
sex, do hereby declare the nature of this invention to be as follows:-
This invention relates to improvements in or connected with smoke-tube
steam generators and has for its object to more fully utilise the heat of the
products of combustion from the furnace by the employment at each side of the
generator of a group of water tubes mounted with capability of being turned in
bearings to admit of access being had to the smoke-tubes, and which group of.
water tubes may be arranged as a water heater or economiser or may be placed
in the water circulation of the generator.
In carrying the invention into effect, a steam and water chamber, preferably
cylindrical in shape, is placed over the furnace and enclosed by a shell or casing
so as to leave a space all round the same and this shell or casing is at its upper
part provided with an outlet for the smoke and products of combustion.
Projecting downwardly from the steam and water chamber and laterally
diverging from each other are two rows or there might be more than two rows
of sectional tube boxes or elements, or instead of being sectional each set of
tube boxes might be in one continuous length and the furnace occupies a position
between these depending elements.
The tube boxes or elements which may be rectangular in cross section are
intersected by transverse smoke tubes and the smoke and products of combustion
from the furnace pass through the tubes into a smoke box or space between the
shell or casing and the tube boxes.
In this smoke box is arranged a flattened group or groups of water tubes which
at their ends are fixed with and open into longitudinal tube boxes which connect
the various tubes and the smoke and products of combustion from the furnace
after passing through the smoke tubes of the elements pass around and amongst
the water tubes on their way to the uptake.
The upper one of the tube boxes is at the ends pivotally supported upon hollow
trunnions mounted with capability of turning in bearings carried for example
by brackets from the steam and water chamber.
When the tubes are required as a water heater or economiser, one of these
trunnions is by a gland coupled with the steam or water space of the steam and
water chamber and the other trunnion is similarly coupled with the pipe leading
from the force pump of the feed and the two water tube boxes are, at suitable
intervals, furnished with partitions or bafile plates which compel the feed water,
which is forced into one end of the upper tube box, to travel in a more or less
circuitous or zig-zag path through the group of tubes to the opposite end of the
upper tube box whence it passes into the steam or water space of the steam and
water chamber.
In this case, the lower tube box is not connected with any portion of the
.

page_text: generator but if the group of tubes are arranged in the water circulation of the
generator, both the ends of the upper tube box are connected with the steam
or water space of the steam and water chamber by pipes and glands, and the
ends of the lower tube box are connected with the bottom boxes or smoke tube
chamber thereby inducing a perfect circulation of the water in the boiler.
When access is desired to the smoke tubes, a door or cover is removed from
an opening in the shell at least co-extensive with the group of water tubes when
the entire group of water tubes may be turned on its trunnions out of the way.
When the group of water tubes is arranged in the water circulation of the
generator it is necessary to disconnect the lower water tube box from the bottom
boxes or smoke tube box before turning the group of tubes on its trunnions.
Dated this 7th day of December 1899.
VAUGHAN & SON,
Agents for the Applicants.
COMPLETE SPECIFICATION.
Improvements in or connected with Steam Generators.
We, GEORGE FRANCIS GABRIEL DES VIGNES, Mechanical Engineer, of Zoffany
House, Strand-on-the-Green, Chiswick, and WALTER AMELIUS CLOUD, Engineer,
of Claremont Villa, Harvard Road, Gunnersbury, both in the County of Middle-
sex, 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:-
Our said invention relates to improvements in or connected with smoke-tube
steam generators and has for its object to more fully utilise the heat of the
products of combustion from the furnace by the employment at each side of the
generator of a group of water tubes mounted with capability of being turned in
bearings to admit of access being had to the smoke-tubes, and which group of
water tubes may be arranged as a water heater or economizer or may be placed
in the water circulation of the generator.
In carrying the invention into effect, a steam and water chamber, preferably
cylindrical in shape, is placed over the furnace and enclosed by a shell or casing
so as to leave a space all round the same and this shell or casing is at its upper
part provided with an outlet for the smoke and products of combustion.
Projecting downwardly from the steam and water chamber and laterally
diverging from each other are two rows of sectional tube boxes or elements, or
instead of being sectional' each set of boxes might be in one continuous length
and the furnace occupies a position between these depending elements.
The tube boxes or elements which may be rectangular in cross section are
intersected by transverse smoke-tubes and the smoke and products of combustion
from the furnace pass through the tubes into a smoke box or space between the
shell or casing and the tube boxes.
a
In this smoke box is arranged a flattened group or groups of water tubes which
at their ends are fixed with and open into longitudinal tube boxes which connect
the various tubes and the smoke and products of combustion from the furnace
after passing through the smoke-tubes of the elements pass around and amongst
the water tubes on their way to the uptake.
The upper one of the tube boxes is at the ends pivotally supported upon hollow
trunnions mounted with capability of turning in bearings carried for example
by brackets from the steam and water chamber.
When the tubes are required as a water heater or economizer one of these

page_text: trunnions is by a gland or other suitable means coupled with the water space
of the steam and water chamber and the other trunnion is similar coupled with
the pipe leading from the force pump of the feed and the two water tube boxes
are, at suitable intervals, furnished with partitions or baffle plates which compel
the feed water, which is forced into one end of the upper tube box, to travel in
a more or less circuitous or zig-zag path through the group of tubes to the
opposite end of the upper tube box whence it passes into the water space of the
steam and water chamber.
In this case, the lower tube box is not connected with any portion of the
generator but if the group of tubes are arranged in the water circulation of the
generator, both the ends of the upper tube box are connected with the steam and
water chamber by pipes and glands or other suitable means and the ends of the
lower tube box are connected with the bottom of the smoke-tube boxes thereby
inducing a perfect circulation of the water in the boiler.
When access is desired to the smoke tubes, a door or cover is removed from an
opening in the shell or casing at least co-extensive with the group of water tubes
when the entire group of water tubes may be turned on its trunnions out of the
way.
When the group of tubes is arranged in the water circulation of the generator,
it is necessary to disconnect the lower water tube box from. the bottom boxes or
smoke-tube box before turning the group of tubes on its trunnions.
And, in order that the said invention may be clearly understood and readily
carried into effect, we will proceed, aided by the accompanying drawings, more
fully to describe the same.
DESCRIPTION OF THE DRAWINGS.
Figure 1, is an end elevation partly in section of a steam generator fitted with
a water heater or economizer according to the present invention.
Figure 2, is a side elevation thereof with part of the casing broken away.
Figure 3, is a sectional elevation of an economizer separately.
Figure 4, is a sectional plan or top view thereof.
Figure 5, is a sectional end view thereof.
Figure 6, is an end elevation partly in section of a steam generator fitted with
a group of water tubes according to the present invention.
Figure 7, is a sectional elevation of a group of water tubes separately, and,
Figure 8, is a longitudinal section of parts.
In the several figures like parts are indicated by similar letters of reference.
Referring to Figures 1 to 5, a, represents the furnace or combustion chamber
and b, represents a steam or water chamber preferably cylindrical in shape which
is placed over the furnace a, and c, represents a shell or casing which encloses
the same but so as to leave a space or flue a¹, all round and this shell or casing c,
is at its upper part provided with an outlet c¹, for the smoke and products of
combustion.
Projecting downwardly from the steam and water chamber b, and laterally
diverging from each other are two rows of sectional tube boxes or elements b¹,
or, instead of being sectional, each set of tube boxes b, might be in one con-
tinuous length, and the furnace a, occupies a position between these depending
elements.
The tube boxes or elements, which may be rectangular in cross section, are
intersected by transverse smoke tubes 62, and the smoke and products of com-
bustion from the furnace a, pass through the tubes 2, into the smoke box or
flue a', between the shell or casing c, and the tube boxes or elements b¹.
In the smoke box or flue a¹, at each side of the generator is arranged a flattened
group of water tubes d, which at their ends are fixed with and open into longi-
tudinal tube boxes d¹, which connect the various tubes d, and the smoke and
products of combustion from the furnace a. after passing through the smoke

page_text: tubes 2, of the elements 6', pass around and amongst the water tubes d, on their
way to the uptake c¹.
The upper one of the tube boxes d', is at its ends pivotally supported upon
hollow trunnions d, mounted with capability of turning in bearings ², carried
by the casing e, or it might be by brackets from the steam and water chamber b,
and the hollow trunnions d², pass through the bearings, to the outside of the
casing c.
One of the trunnions ², is by a stuffing box g³, and pipe d, coupled with the
water space of the steam and water chamber b, and the other trunnion d'is
similarly coupled with a pipe, leading from the force pump of the feed.
The two water tube boxes d', are at suitable intervals furnished with parti-
tions or baffle plates 6, which compel the feed water, which is forced into one
end of the upper tube box d, to travel in a more or less circuitous or zig-zag
path through the group of tubes d, to the opposite end of the upper tube box d¹,
whence it passes into the water space of the steam and water chamber b, and in
this case the lower tube box di, is not connected with any portion of the generator
but rests against and is removeably bolted to a bracket, from the casing a.
When access is desired to the smoke tubes 2, a door or cover, covering an
opening provided in the shell or casing e, at least co-extensive with the group of
water tubes, is removed when the entire group of water tubes d, may after
disconnecting it from the bracket 3, be turned on its trunnions, out of the
way as indicated by the dotted lines in Figure 1.
It will be understood that an economizer d, may be arranged on each side of
the generator in which case a separate feed may be arranged in connection with
cach group of tubes, or, the feed water would be introduced into one group and
conveyed by a pipe to and passed through the other on its way to the steam and
water chamber b.
In the example given at Figures 6, to 8, a flattened group of water tubes d, is
mounted upon hollow trunnions, in a similar manner to that herein before
shown and described with respect to the previous figures but in this case the device
is placed in the water circulation of the generator.
For this purpose, the hollow trunnions 2, at both ends of the upper tube
box, are connected with the steam, or it might be the water, space of the steam
and water chamber b, by means of stuffing boxes, and pipes 4, and the ends
of the lower tube box, are connected with the lower part of the water space
of the smoke tube boxes b', by pipes d', carried by the tube box, and unions *,
coupling them with similar pipes 63, carried by the tube box, thereby inducing
a perfect circulation of the water in the generator.
According to this arrangement, when access is desired to the smoke tubes 62,
the pipes, and 63, are disconnected at the unions 6, the door c, in the casing e,
is opened and the group of water tubes d, is swung outward on the trunnions d², as
described with respect to the previous arrangement.
In the smoke box or flue ¹, is or may be placed a steam superheater consisting
of a group of tubes e, opening into tube boxes e', one of which is by a pipe e²,
connected with the upper part of the steam and water chamber b, and the other
of which is fitted with a steam supply pipe ei³.
The feed water may be introduced into the water space at the lower part of the
smoke tube boxes, or into the lower part of the steam and water chamber b,
as may be found convenient.
By the means herein before described, the products of combustion from the
furnace . after passing through the smoke tubes 2, on their way to the uptake
in addition to acting upon the steam and water chamber b, also give up part of
their heat to the group of tubes d, whilst by reason of the peculiar construction
of the latter access may readily be obtained to the smoke tubes for cleaning or
other purposes.

page_text: 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:-
1. A steam generator comprising a steam and water chamber provided with
depending divergent sectional or other members or elements transversely inter-
sected by smoke tubes, a furnace located beneath and between said members, a
casing surrounding the generator and furnace, so as to leave a smoke box or flue
around the same, a flattened group of water tubes located in said flue at each side
of the generator said group being mounted on hollow trunnions and placed in
circulation of the generator or utilized as a feed water heater or economizer in
such manner that the device may be turned on said trunnions in order to give
access to the smoke tubes, substantially as herein shown and described and for
the purpose stated.
2. A steam generator comprising a steam. and water chamber provided with
depending divergent sectional or other members or elements transversely inter-
sected by smoke tubes, a furnace located beneath and between said members, a
casing surrounding the generator and furnace so as to leave a smoke box or flue
around the same, a flattened group of water tubes located in said flue said tubes
at the ends being connected by tube boxes the upper one of which is furnished
with hollow trunnions mounted in bearings and one connected by a gland with
a pipe leading from the feed pump and the other similarly connected with a pipe
leading to the steam and water chamber said tube boxes being furnished with
partitions causing the feed water to travel in a circuitous path, substantially as
herein shown and described and for the purpose stated.
3. A steam generator comprising a steam and water chamber provided with
depending divergent sectional or other members or elements transversely inter-
sected by smoke tubes, a furnace located beneath and between said members, a
casing surrounding the generator and furnace so as to leave a smoke box or flue
around the same, a flattened group of water tubes located in said flue said tubes
at the ends being connected by tube boxes the upper one of which is furnished
with hollow trunnions mounted in bearings and connected by glands or stuffing
boxes with pipes leading to the steam and water chamber and the lower one of
which is by means of detachable connections connected with the lower part of
the water space of the said members or elements, substantially as herein shown
and described and for the purpose stated.
4. A steam generator provided with a flattened group of water tubes located
n the path of the products of combustion and mounted on hollow trunnions
vith capability of swinging out of the way, substantially as herein shown and
described and for the purpose stated.
Dated the 12th day of April 1900
VAUGHAN & SON,
Agents for the Applicants.