Improvements in Steam-generators and Apparatus Connected therewith.
Year: 1886

page_text: Date of Application, 31st Mar., 1886.
Complete Left, 9th Dec., 1886.
Complete Accepted, 11th Jan., 1887.
Improvements in Steam-generators and Apparatus Connected
therewith.
I, WILHELM SCHMIDT, of Brunswick in the Empire of Germany, Civil Engineer, do
hereby declare the nature of this Invention to be as follows:-
.
The principal object of the present improvements in tubular steam generators is the
addition of a heat-regulator by means of which the tension of steam, which owing to
the small quantity of water and the large heating surface in the tube system is on its
exit from the same variable, may be kept uniform.
Ordinary reservoirs for steam or water not being applicable owing to the high
tension (50 and more atmospheres) under which these tube-system steam generators
can work, a receptacle is employed which is not subjected to the full pressure of the
generator or to any pressure at all, and filled with a liquid or solid body (for instance
acotate of soda) easily absorbing heat. The tube through which the steam passes
from the generator to the engine, is led through this said receptacle where it is bent
in a holical or other suitable form to offer a large surface to the liquid in the receptacle.
This liquid may be oil or other substance of a high boiling point heated to the
required temperature so that the superheated steam may be reduced to the same
temperature and stored in the receptacle: also when the fire is burnt down the
receptacle can if necessary raise the temperature of the steam.
A principal feature of the improved steam generator is the arrangement of the
continuous tube system in the same which consists of a number of flat spirals placed
one above the other that is to say: each layer forms a flat spiral, the two extremities
of which communicate with the next upper and lower spiral respectively. By this
arrangement a very large heating surface is obtained in the smallest space and giving
at the same time a great length of tubing for the water to pass through and be
converted into steam.
Each of these flat spirals can be adapted to be separately put ip and removed,
being supported in any convenient manner. The following construction may also be
followed.
The spirals are so combined, that the water passes from the upper spirals direct to
the lowest spiral and through this to the central spirals, whereby the above mentioned
advantages are still obtained and also the lowermost spiral, lying next to the fire, is
protected.
WILHELM SCHMIDT.
.C.,
Pp. Herbert & Co.,
67, Strand,
Agents,

page_text: I, WILHELM SCHMIDT, of Brunswick in the Empire of Germany, Civil 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 state-
ment :-
.
The principal object of the present improvements in tubular steam generators is the
addition of a heat-regulator by means of which the tension of steam, which, owing to
the small quantity of water and the large heating surface in the tube system is on its
exit from the same variable, may be kept uniform.
Referring to the accompanying drawing Fig. 1 is a sectional elevation of the
generator. Fig. 2 a plan view of the generator and regulator. Fig. 3 a modification
construction or arrangement of the tubes in the generator. Fig. 4 a sectional view of
the same.
Ordinary reservoirs for steam or water not being applicable owing to the high
tension (50 and more atmospheres) under which these tube system steam generators
can work, a receptacle A is employed which is not subjected to the full pressure of the
generator or not to any pressure at all, and filled with a liquid or solid body (for
instance acetate of soda) easily absorbing heat. The tube x through which the steam
passes from the generator to the engine, is led through this said receptacle A where
it is bent in a helical or other suitable form to offer a large surface to the liquid in the
receptacle.
This liquid may be oil or other substance of a high boiling point so that the super-
heated steam may be reduced to any required temperature and stored in the receptacle,
also, when the fire is burnt down, the receptacle can if necessary raise the temperature
of the steam.
A principal feature of the improved steam generator is the arrangement of the
continuous tube-system S in the same, which consists of a number of flat spirals s'
placed one above the other that is to say: each layer forms a flat spiral, the two
extremities of which communicate with the next upper and lower spiral respectively.
By this arrangement a very large heating surface is obtained in the smallest space
giving the same time a great length of tubing for the water to pass through and be
converted into steam.
and
Each of these flat spirals s¹ can be adapted to be separately put in and removed
being supported in any convenient manner.
The following construction may also be followed ;
The spirals are so combined, that the water passes from the upper spirals direct
through tube n to the lowest spiral (as shown in Figs. 3 and 4) and through this to
the central spirals, whereby the above mentioned advantages are still obtained and also
the lowermost spiral, lying next to the fire, is protected by the water therein.

page_text: Having now particularly described and ascertained the nature of said invention and
in what manner the same is to be performed, I declare that what I claim is :-
In steam generators :
1. The combination of a number of flat spiral tubes arranged horizontally above
one another and connected together in series, substantially as and for the purpose
described.
2. The combination of a number of flat spiral tubes arranged horizontally above
one another and so connected that the water is caused to pass through several upper
spirals in series and thence to the lowest spiral, and thence through the intermediate
spirals, substantially as and for the purpose set forth.
3. A heat regulator consisting of a receptacle containing a heat absorbing material
and through which the steam pipe is led, substantially as and for the purpose set forth.
WILHELM SCHMIDT.
Pp. Herbert & Co.,
67, Strand, W.C.,
Agents to Applicant.