Improvements in Motors Driven by Mixed Steam and Air.
Year: 1889

page_text: Date of Application, 11th Mar., 1889
Complete Specification Left, 9th Dec., 1889-Accepted, 1st Mar., 1890
PROVISIONAL SPECIFICATION.
Improvements in Motors Driven by Mixed Steam and Air.
I, WILHELM SCHMIDT of 8, Plantagen Strasse, Halberstadt, Engineer do hereby
declare the nature of this invention to be as follows:-
In motors for light work driven by steam and air mixed, a great improvement is
effected by the use of two boilers separated and standing under different pressures.
The application of this idea is shown in figs. 1 and 2 of the accompanying drawings.
Fig. 1 is a vertical section through the motor; fig. 2 is an elevation with the steam
and air cylinder in section, as also a part of the superheater.
The water is heated in the under part, or low pressure part of this "double boiler"
and the warmed water is driven by a pump into the upper or high pressure part, where
it is evaporated and where the mixture of air and steam, which generates the power,
is effected.
In the drawings: A is the low pressure part of the boiler where the water is heated
by the fire in the fire-box D.
The hot water is then pumped by means of the pump p into the upper part of the
boiler or evaporating boiler ; it then flows through the cover on to and through
the sieve e where it becomes separated into very small particles. These falling particles
of water are met by the current of air driven into the evaporating boiler from the
air chamber m of the cylinder through the pipe h. The hot water will now rapidly
evaporate whereby it becomes cooler. The cool water then sinks to the bottom of the
boiler where, by means of an outlet pipe or as shown in the drawing the arrangement
with a float, it is taken again into the low pressure boiler A. The mixture of air and
steam, produced in the high pressure boiler, is now passed through the superheater ff
where it is superheated or dried and then into the cylinder where it is used on the
power side k of the same.
The superheater consists of the two pipes fand between which the steam and air
mixture passes. The inside pipo f has the ribs ff in order to catch off more heat
from the escaping fire-gases. Inside the pipe f the steam outlet pipe z is fixed, so that
the exhaust mixture of steam and air is used for increasing the fire draught.
Dated:
LCM 1000
WILHELM SCHMIDT.
By A. Kuhnt & R. Deissler,
38, Alexander Strasse, Berlin, C., Germany, Agents for Applicant.
COMPLETE SPECIFICATION.
Improvements in Motors Driven by Mixed Steam and Air.
I, WILHELM SCHMIDT, Engineer of 8, Plantagen Strasse, Halberstadt, German
Empire, 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:
In motors for light work driven by steam and air mixed, a great improvement is
effected by the use of two boilers separated and standing under different pressures.
The application of this idea is shown in Figs. 1 & 2 of the drawings sent in with
provisional Specification.
Fig. 1 is a vertical section through the motor :
Fig. 2 is an elevation with the steam and air cylinder in section, as also a part of
the superheater.
The te
lanted in the unda- nant or low progaure part of this "double boiler"

page_text: and the warmed water is driven by a pump into the upper or "high pressure" part,
where it is separated into fine particles by means of sieves, said particles are then met
by a current of air & evaporated and thus the mixture of air and steam, which
generates the power, is effected..
In the drawings A is the low pressure part of the boiler where the water is heated
by the fire in the fire-box D.
The hot water is then pumped by means of the pump p into the upper part of the
boiler or evaporating boilor; it then flows through the cover dion to and through
the sieve e where it becomes separated into very small particles. Those falling particles
of water are met by the current of air driven into the evaporating boiler from the air
chamber m of the cylinder, through the pipe h. The fine particles of hot water will
now partially be rapidly evaporated by the current of air whereby the remaining water
gets cooler. The cool water then sinks to the bottom of the boiler where by means of
an outlet pipe or, as shown in the drawing, the arrangement with a float, it is taken
again into the low pressure boiler A. The float arrangement shown in the drawing
works in the following manner: As soon as the water has risen to a certain extent,
in the bottom of the upper boiler, it runs over the sides of the float and into the
same. The float thus sinks in the water outside of it and in sinking opens up the holes
in the side of the outlet pipe whereby the water, which has flowed into the float may
escape. As soon as the float has thus become empty, it rises again, whereby its collar
comes over the outlet holes, closing the same. The mixture of air and steam, produced
in the high pressure boiler, is now passed through the superheater ff where it is
superheated or dried and then into the cylinder where it is used on the power side k of
the same.
The superheater consists of the two-pipes and 1 between which the steam and air
mixture passes. The inside pipe has the ribs ff in order to catch off more heat
from the escaping fire-gases. Inside the pipe the steam outlet pipe z is fixed, so
that the exhaust mixture of steam and air is used for increasing the fire draught.
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:
In motors driven by a mixture of steam and air :
1: The method of first heating the water in a low pressure boiler, pumping the
same. into an evaporating boiler from above, where it is met by air compressed into the
boiler from below, thus causing rapid evaporation, then superheating the mixture and
using the same as motive power.
2. The combination of a boiler A, an evaporating:boiler v, a steam and air cylinder,
a pump p and superheater, in the manner and for the purpose substantially as
described.
e,
3. The combination with boiler A of the evaporating boiler v, having cover d,
sieves hot water inlet, air inlet h and connected with the superheater by pipe n, and
with the water of the low pressure boiler by float arrangement, substantially as
described.
4. In combination with boilers:A and. and pump-p; the superheater consisting of
pipe f.having ribs f² outer pipe f¹ and exhaust pipe and having connections with.
boiler and cylinder, substantially as described.
Dated Berlin this 7th devinf Deamber 1980
WILHELM SCHMIDT.
By A. Kuhnt & R. Deissler,
.38, Alexander Strasse, Berlin, C.,, Germany, Agents for Applicant.