Improvements in Steam Boilers or Generators.
Year: 1896

page_text: Date of Application 17th Aug., 1890
Complete Specification Left, 12th May, 1897-Accepted, 12th June, 1897
PROVISIONAL SPECIFICATION.
Improvements in Steam Boilers or Generators.
We, CHARLES LUTZ, of 6 Rue Jacques Cottin, Pantin, and FRANÇOIS LOUIS
DESAUNAY, of 28, Faubourg Montmartre, Paris, both in the Republic of
France, Engineers, do hereby declare the nature of this invention to be as
follows:-
The improved boiler or steam generator which forms the subject of our present
invention, consists of generators containing water, and formed of truncated cones.
Each of these cones is double, that is to say is formed of an exterior and an
interior cone separated by a space sufficient to contain the water from which steam
is to be generated.
The outer surface of the interior cone is provided with a helical rib or feather,
so that a helical passage is formed between the two cones, along which the
water passes when being heated. The ends of the outer cone are made to fit
tightly over projecting ends on the inner one, which are properly shaped for this
purpose.
The exterior cone is heated and forcibly pressed down upon the inner one, so that
they form substantially a strong double walled cone having a helical rib extending
from top to bottom in the intermediate space. For greater security the two cones
may be brazed together where they are fitted to each other.
Two or more of such hollow conical chambers of different diameter are
arranged one inside the other, a suitable space being left between them, and
they are fixed above a firegrate below the flame from which passes between
and surrounds them. A thin external case may be fitted round the boiler, the part
above the cones forming a chamber communicating with a chimney, and through
this casing the steam pipes, gauges, feed pipes, pass. The chamber above the
cones is fitted with a door.
In order to connect the upper and lower ends respectively of the helical spaces
in the adjoining series of hollow cones, a coupling is used, consisting of a short
pipe projecting at right angles from the exterior of the inner double case, and
having a flange at its end, so arranged as to be opposite to a corresponding
flat flange or seat upon the opposite interior of the adjoining double cone, and
having an opening through it communicating with the end of the helical passage in
the latter.
The openings in the opposite flanges are made conical or countersunk, and
are connected by a short piece of pipe having corresponding cones at its ends,
which is held in its place by bolts or studs by which the two flanges are drawn
together.
.
1000

page_text: Improvements in Steam Boilers or Generators.
We, CHARLES LUTZ, of 6, Rue Jacques Cottin, Pantin, and FRANCOIS
LOUIS DESAUNAY, of 28, Faubourg Montmartre, Paris, both in the Republic
of France, Engineers, 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, and accompanying drawing, that
is to say:
The improved boiler or steam generator which forms the subject of our present
invention, has for its object the generation of steam in large quantity in a small
врасе.
The accompanying drawing is in illustration of the invention.
Figure 1 is a vertical section, and Figure 2 a plan.
Figure 3 is a sectional elevation of one of the conical parts of the generator.
Figure 4 is a plan of the firegrate.
Figure 5 is a vertical section, Figure 6 is a plan, and Figure 7 a horizontal
section (on a larger scale) of the arrangement of connections between the cones.
The improved boiler consists of generators containing water and formed of any
desired number of hollow truncated cones a of different diameters. Each of these
cones is double, that is to say is formed of an exterior and an interior cone
separated by a helical space through which the water from which steam is to be
generated is pressed. b is the pipe by which the boiler is fed, and is the
steam pipe. d, d, are the couplings or connections between the several conical
generators, which are surrounded by a sheet metal casing e, and a moveable cover e¹
through which the fire is fed. The conical generators a are carried by supports f
upon the firegrate j.
In the plan (Figure 2) g is a smoke-box, and h a chimney.
The outer surface of the interior cone of the double truncated generating cones,
is provided with a helical rib or feather, so that a helical passage is formed
between the two cones, along which the water passes when being heated. Or, two
helical passages may be formed in a similar way, one ascending and the other
descending, connected together at their lower end by a horizontal part. The ends
of the outer cone are made to fit tightly over projecting ends on the inner one,
which are properly shaped for this purpose.
The exterior cone is finished somewhat less in diameter than the inner one,
and is heated and forcibly pressed down upon the inner one, so that they form
substantially a strong double walled cone having a helical rib extending from top
to bottom (or from top to bottom and from bottom to top) in the intermediate
space. For greater security the two cones may be brazed together where they are
fitted to each other.
Two or more of such hollow conical chambers of different diameter are arranged
one inside the other as shown, a suitable space being left between them, and
they are fixed above the firegrate j, the flame from which passes between and
surrounds them. Through the casing the steam pipes, gauges, and feed
pipes, pass.
In order to connect the outlet and inlet ends of the helical spaces or channels in
the adjoining series of hollow cones, a coupling is used, consisting of a short pipe
projecting at right angles from the exterior of the inner double case (as shewn in
Figures 5, 6, and 7), and having a flange k at its end, so arranged as to be opposite
to a corresponding flat flange or seat i upon the opposite interior of the adjoining
double cone, and having an opening through it communicating with the end of the
helical passage in the latter,

page_text: The openings in the opposite flanges i and k are made conical or countersunk,
and are connected by a short piece of pipe m having corresponding cones at its
ends, which is held in its place by bolts or studs by which the two flanges are
drawn together.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is :-
1. The steam generator, consisting of conical double thicknesses of metal, between
which are formed helical passages, in which the water is heated and steam generated,
substantially as described.
2. In steam generators of the kind claimed in Claim 1, the means of connecting.
together the passages in the conical generators, consisting of a pipe m having
conical ends, connecting the inlet end of one helical passage with the outlet end of
the next, and having its conical ends held firmly in the conical recesses upon the
truncated cones forming the generators, by means of screws, substantially as
described and illustrated.
EDWARDS & Co.,
65 and 66, Chancery Lane, London, Agents for the Applicants.