MENTS IN SLIDE-VALVES AND PARTS APPERTAINING THERETO FOR CHANGING THE CURRENT OF HOT GASES
Year: 1882

page_text: LETTERS PATENT to Carl Pieper Civil Engineer and Patent Agent resident at
109-110 Gneisenaustrasse Berlin, S.W. Prussia, for an Invention of "IMPROVE-
"
MENTS IN SLIDE-VALVES AND PARTS APPERTAINING THERETO FOR CHANGING
THE CURRENT OF HOT GASES A communication to him from Eduard Blass,
Civil Engineer, residing in Rothenfelde near Osnabrück, Kingdom of Prussia,
German Empire,
.
PROVISIONAL SPECIFICATION left by the said Carl Pieper at the Office of
the Commissioners of Patents on the 14th December 1882.
CARL PIEPER, Civil Engineer and Patent Agent, resident at 109/110 Gneisenau-
strasse, Berlin S.W., Prussia, "IMPROVEMENTS IN SLIDE-VALVES AND PARTS
APPERTAINING THERETO FOR CHANGING THE CURRENT OF HOT GASES," a communi-
cation from Eduard Blass, Civil Engineer, residing in Rothenfelde near Osnabrück,
Kingdom of Prussia, German Empire,
In the production and employment of gases, as for instance water-gas, it is in
some cases necessary to conduct such gases in very hot state from one channel
alternatively to the first, second, third one, &c., of two or more other channels.
For the purpose of changing the connection between the different channels metallic
slide-valves of the so-called D-shape, such as are employed in ordinary steam
engines, are best adapted; but if used without any further appliances, they would
speedily become unserviceable from the heigh temperature to which they are
exposed.
In order to attain a greater durability of such slide-valves and of the port-face,
or the plate containing the mouths of the channels, or ports, the inventor constructs
the said valve and port-face in such a manner that they may be cooled by means of
water.
For this purpose the valve is provided with a rin or, walls forming together with
the valve a box adapted to contain water. The plate constituting the port-face is
made to form the top or side of another box through which the channel ends
terininating in the said ports are carried, and which may also be filled with water.
Besides, both parts are provided with suitable pipes for conveying water into and
out of the same, and they are so arranged that the water flowing through them will
cover or be in contact with all the surfaces exposed to heat.
The valves may be constructed to be shifted in a straight line, or in a circle, and
the channels may be arranged in different forms and relative positions.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Carl Pieper in the Great Seal Patent Office on the 6th June
1883.
CARL PIEPER, Civil Engineer and Patent Agent, resident at 109/110 Gneisenau-
Strasse, Berlin, S.W. Prussia. "IMPROVEMENTS IN SLIDE-VALVES AND PARTS
APPERTAINING THERETO FOR CHANGING THE CURRENT OF HOT GASES," a communi-
cation to me from Eduard Blass, Civil Engineer, residing in Rothenfelde near
Osnabrück, Kingdom of Prussia, German Empire.
In the production and employment of gases, as for instance water-gas, it is in
some cases necessary to conduct such gases in a very hot state from one channel
alternately to the first, second, third one, etc, of two or more other channels. For
the purpose of changing the connection between the different channels, metallic
slide-valves, such as are employed in ordinary steam engines, are best adapted;
but if used without any further appliances, they would speedily become
unserviceable from the high temperature to which they are exposed.
In order to attain a greater durability of such slide-valves and of the port-face,
or the plate containing the mouths of the channels, or ports, the inventor constructs
.the said valve and port face in such a manner that they may be cooled by means
of water.
On the annexed sheet of drawings different valves of this kind are represented.
Figs 1 and 2 show in two different sections a slide valve A adapted to be shifted
in a straight line, and a plate provided with the ports a, b, and c, of which a is
to be put alternately in communication with b and c, while at the same time the
noncommunicating channel is closed. The valve is provided with a rim or walls
forming together with the valve a box adapted to contain water. The port plate
forms the top or side of another box, B, through which the channel-ends
terminating in the said ports are carried. This box is entirely filled with water.
Both parts A and B are provided with suitable pipes for conveying water into and
out of the same, and they are so arranged that the water flowing through them
will cover or be in contact with all the surfaces exposed to the heat. According to
the drawing the 'water is introduced by the piped into the box B, passes from
the same by e to the valve and runs off from the latter by f. The arrangement.of
these pipes may, however, be varied, provided always that they be adapted to
cause a flow of water through the hollow spaces of the two parts without allowing
any steam to accumulate within the same." The valve may be closed at the top so
far as the introduction of water will allow.
The figures 3 to 10 show rotative slide valves and their port-plates cooled in a
manner similar to the foregoing. In the arrangement represented by Figs 3 and 4
in two sections, and by Fig: 5 in plan, the surface of contact between the valve
and the port plate is straight, whereas, according to Figs 6 and 7 the valve is in
contact by its outer cylindrical surface with the corresponding inside surface of
the port-plate forming in this case a kind of shell. d, e, and fare, as in the former
figures, the water-conducting pipes.
The slide-valve may also be carried out in the form of a cone turning in a
conical shell. Besides it is possible to arrange in the port-plate or the shell of the
rotative valve more than three ports; also the number of cavities in the slide-valve
may be multiplied; see Fig: 8.
Figures 9 and 10 finally show a disposition in which a central channel may be
put in communication successively with each of several channels which surround it.
Also in this modification the face of the valve may be carried out in the form of a

page_text: cone, or partly, at least, in cylindrical form. These different forms, however,
neither constitute the subject-matter of the invention, nor do they comprise all
the different arrangements of slide valves adapted to be cooled in the manner
described. They have merely been represented to show how the inventor's
system of cooling by means of water may be applied under different circumstances.
Having thus described the nature and object of this Invention as communicated
to me by my correspondent, I hereby claim as new and important feature of the
same:
In slide valves of the kind described and serving to change the direction of the
current of hot gases, the arrangement of these valves and their port plates or shells
with hollow spaces through which water is conducted, substantially as and for the
purpose specified.
In Witness whereof I the said Carl Pieper have hereunto set my hand and
seal this twenty third day of May in the year of our Lord 1883.