Year: 1886

page_text: Date of Application, 24th Nov., 1886.
Complete Left, 18th July, 1887.
Complete Accepted, 19th Aug., 1887.
I, ALFRED MUSIL, Engineer and Director of the Imperial Technical School for Iron
and Steel Industries in Styria, Upper Austria, do hereby declare the nature of this
invention to be as follows:-
This invention relates to an improved construction of rotatory steam generator
whereby the heat produced by the combustion of the fuel is utilised in a very perfect
manner, the water being subinitted to its action in comparatively thin layers within
receptacles offering vory extended heating surfaces so that steam can be generated
within a short time and at a low cost.
The rotating generator, which has very few joints requiring to be made steam
tight, works with a much smaller quantity of water than is required in boilers of
present construction, and as, in addition, all parts thereof are of a configuration that
will best resist strain, namely either cylindrical or spherical, any risk of explosion is
reduced to a minimum. The generator is consequently particularly adapted for use
in connection with motor engines employed for domestic purposes or small
industries.
The construction of the generator will be readily understood on reference to the
accompanying drawing, in which Fig. 1 shews a longitudinal section and Fig. 2 a
cross section.
The steam generator consists essentially of a horizontal central tube a rotating in
horizontal bearings at its ends, and which is partly filled with water. On the rotation
of this tube at a suitable speed the inner surface thereof is continually moistened
with water, and each part of this surface passes at each revolution in contact with the
water lying in the lowest part of the tube. The tube a being heated from the outside,
the whole surface thereof constitutes heating surface. In order to increase this
heating surface to any required extent, and to obtain a forced circulation of the water,
the tube a is surrounded by a helical tube or worm j, the ends of which open
into the central tube; or in place of a single such worm several thereof may be
used. As the worm rotates with the central tube, it receives from the latter
at a' a certain portion of the water, which is led along the several convolutions of
the worn as this rotates, and after as many revolutions have taken place as there
Drinn 27

page_text: are coils in the helix, the water is discharged at a² into the central tube again. Thus
a forced circulation of the water is effected not only in the helical tube but also in
the central tube from one end to the other.
The inner surface of the helical tube is also continuously moistened by the rotating
motion, and is brought in contact with the bodies of water lying in the bottoms of the
several coils, and consequently the entire combined surface of the central tube a and
the helical tube j enclosed in a heating chamber, will constitute heating surface.
The steam generated is led off through a helical tube & that communicates with one
end at a³ with the central tube a, and with the other end, at a, with a chamber m
formed in the central tube. In order that, under normal conditions no water may
find its way into the steam pipe k, an inwardly projecting branch pipe n is provided
in the central tube at a³.
The steam having to pass through the entire length of the helical tube k rotating
with tube a, in order to pass into the chamber m, it is effectually dried by this means,
and eventually passes from m through the pipe finto a steam chest, provided with
suitable safety apparatus such as pressure gauge and safety valve.
The feed water is continuously fed into the central tube a at d in such manner as to
maintain a constant water level in the latter, the branch pipe n being made to project
to such an extent into the tube a that when in its lowest position it is exactly lovel
with the normal water level in a. If now the water level in a should rise beyond
the normal height, the excess of water will pass at cach revolution of the generator
into the pipe n and will be led off through the tube k, whereby, owing to the
heat to which it is exposed in this tube, it will be wholly or partly evaporated, the
remainder, if any, passing into the chamber m and thence into the steain chamber.
The steam pipe therefore serves also for carrying off any excess of water that may
flow into the central tube.
The steam generator may be supported in its horizontal position either by means
of bearing rollers c as indicated in dotted lines, or by ordinary bearings suitably
arranged, and it can be rotated by any suitable known means; its speed of rotation
will depend upon its size, and should be such that its inner surface always remains
moistened with water.
The generator rotates in a casing 6 of metal or brickwork which is preferably
so arranged that by lifting off a cover, or several sectional covers, the generator is
readily accessible, so that on rotating the same every part thereof can be examined.
With the casing is combined a suitable heating furnace, the flames or combustion
gases from which circulate round the generator, and heat it to a uniform degree in all
its parts in consequence of its rotation.
In order to enable the generator to be readily cleansed, it is advisable to close the
ends of the central tube with removeable bonnets and also to provide it with small
hand holes closed by covers.
Dated this 24th day of November 1886.
ABEL & IMRAY,
Agents for the Applicant.

page_text: I, ALFRED MUSIL, Engineer and Director of the Imperial Technical School for
Iron and Steel Industries in Steyr, 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 :-
This invention relates to an improved construction of rotatory steam generator
whereby the heat produced by the combustion of the fuel is utilised in a very perfect
manner, the water being submitted to its action in comparatively thin layers within
reseptacles offering very extended heating surfaces so that steam can be generated
within a short time and at a low cost.
The rotating generator, which has very few joints requiring to be made steam
tight, works with a much smaller quantity of water than is required in boilers of
present construction, and as, in addition, all parts thereof are of a configuration
that will best resist strain, namely either cylindrical or spherical, any risk of explosion
is reduced to a minimum. The generator is consequently particularly adapted for
use in connection with motor engines employed for domestic purposes or small
industries.
The construction of the generator will be readily understood on reference to the
drawing accompanying my provisional specification filed November 24th 1886 in which
Fig. 1 shews a longitudinal section and Fig. 2 a cross section.
The steam generator consists essentially of a horizontal central tube a rotating in
horizontal bearings at its ends, and which is partly filled with water. On the rotation
of this tube, at a suitable speed the inner surface thereof is continually moistened
with water and each part of this surface passes at each revolution in contact with
the water lying in the lowest part of the tube. The tube a being heated from the
outside, the whole surface thereof constitutes heating surface. In order to increase
this heating surface to any required extent, and to obtain a forced circulation of the
water, the tube a is surrounded by a helical tube or worm J, the ends of which open
into the central tube; or in place of a single such worm several thereof may be used.
As the worm J rotates with the central tube, it receives from the latter at a¹ a certain
portion of the water which is led along the several convolutions of the worm as
this rotates, and after as many revolutions have taken place as there are coils in the
helix, the water is discharged at a¹ into the central tube again. Thus a forced
circulation of the water is effected not only in the helical tube but also in the central
tube from one end to the other.
The inner surface of the helical tube is also continuously moistened by the rotating
motion, and is brought in contact with the bodies of water lying in the bottoms of the
several coils, and consequently the entire combined surface of the central tube a and
the helical tube J enclosed in a heating chamber, will constitute heating surface.
The steam generated is led off through a helical tube & that communicates with
one end at as with the central tube a, and with the other end at a with a chamber m

page_text: formed in the central tube. In order that under normal conditions no water may
find its way into the steam pipe K an inwardly projecting branch pipe n is provided
in the central tube at a³.
The steam having to pass through the entire length of the helical tube K rotating
with tube a in order to pass into the chamber m, it is effectually dried by this means,
and eventually passes from m to the pipe finto a steam chest, provided with suitable
safety apparatus such as pressure gauge and safety valve.
The feed water is continuously fed into the central tube a at d in such manner
as to maintain a constant water level in the latter, the branch pipe n being made
to project to such an extent into the tube a that when in its lowest position it is
exactly level with the normal water level in a. If now the water level in a should
rise beyond the normal height, the excess of water will pass at each revolution of the
generator into the pipe n and will be led off through the tube k, whereby owing to
the heat to which it is exposed in this tube, it will be wholly or partly evaporated, the
romainder if any passing into the chamber m and thence into the steam chamber.
The steam pipe K therefore serves also for carrying off any excess of water that
may flow into the central tube.
The steam generator may be supported in its horizontal position either by means
of bearing rollers c as indicated in dotted lines, or by ordinary bearings, suitably
arranged, and it can be rotated by any suitable known.means; its speed of rotation
will depend upon. its size, and should, be such that its inner surfaco always romains
moistened with water.
The generator rotates in a casing 6 of metal or brickwork which is preferably so
arranged that by lifting off a cover, or several sectional covers, the generator is readily
accessible, so that on rotating the same, every part thereof can be examined. With
the casing is combined a suitable heating furnace, the flames or combustion gases
from which circulate round the generator and heat it to a uniform degree in all its
parts in consequence of its rotation.
In order to enable the generator to be readily cleansed, it is advisable to close the
ends of the central tube with removeable bonnets and also to provide it with small
hand holes closed by covers.
Having now particularly described and ascertained the nature of this invention and
in what manner the same is to be performed I declare that what I claim is :-
1. A steam generator consisting of a central tube a partly filled with water and
made to rotate on its horizontal longitudinal axis, which tube is surrounded by one or
more helical tubes j, the ends of which communicate with the contral tube, the
combined central and helical tubes being heated externally, thus affording a large
extent of heating surface and a forced circulation of the water.
2. In combination with a steam generator constructed as set forth in the preceding
claim, the use of a helical tube K surrounding the central tube a and communicating
at one end with a chamber m in the one end of the tube a while its other end n
projects into the other end of the central tube to such an extent that its opening rises
to the level of the normal water level therein when the tube is in its lowest position,
so that both the steam generated and any excess of water are carried off by the said
tube k substantially as herein described.
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