Improvements in Fluid Pressure Regulators and Safety Appliances.
Year: 1897

page_text: Date of Application, 18th Feb., 1897-Accepted, 12th Feb., 1898
COMPLETE SPECIFICATION.
Improvements in Fluid Pressure Regulators and Safety Appliances.
We, FRANZ JUHASZ, of 32/33, Augsburgerstrasse, Merchant, and FERDINAND
KRUGER, of 7, Körnerstrasse, Engineer, both in Berlin, in the 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: -
This invention relates to improvements in fluid pressure regulators and safety
appliances in connection therewith, which are employed or may be used in com-
bination with valves, cocks, doors, dampers, bulkhead doors, for regulating fluid
pressure in vessels and pipes of all kinds, for regulating the level of liquids, and
the distribution of steam in marine engines when the screw races, and the like.
We will describe our said improvements with reference to the accompanying
drawings, each figure in which represents a different form of the apparatus in vertical
section. In the form illustrated by Figure 1, there is a working cylinder C, con-
taining the piston P attached to the piston rod R, and parallel with it a smaller
cylinder St which also contains a piston K and, fixed upon the same rod, a supple-
mentary piston K¹. The two cylinders are in communication through the two
ports a e. The apparatus is operated when a greater than normal pressure differ-
We will call
ence occurs on opposite sides of the connected pistons K and K¹.
the pressure on one side, which may for example be the pressure in a steam
generator, the "initial" pressure, and the pressure on the other side which may be
the pressure in the steam chest of an engine, the "working" pressure. The open-
ing E is placed in close communication with the initial pressure, and the opening F,
in similar communication with the working pressure which acts on the upper face
of K. The opening A is always open to the air. As shewn in the apparatus
Figures 2 and 3, where there is no effective working pressure acting downwards
on the piston K, this pressure is replaced by the weight g, or by the spring f as
indicated. The dimensions of the pistons K K' are so determined (Figure 1),
that under normal conditions the piston K closes the port e. The dimensions of
both the ports a and e may be controlled by adjusting screws if desired, so as
to give the apparatus quicker or slower action.
The apparatus operates in the following manner: -If the initial pressure should
have increased, or if the working pressure should have diminished, above and below
certain limits, in other words, if the normal difference of pressure should have in-
creased, the piston K is lifted thereby opening the port e and closing the port a.
The initial pressure is now exerted upon the lower face of the piston P which is
lifted. This motion of the piston P and its rod R is communicated to the valves,
cocks, dampers, and bulk-head doors, and to the known devices for the regulation
of liquid levels through the intervention of suitable levers or link-work, the arrange-
ment of which will in each case be obvious, and which is pinned to the eye Tat
In the case of a
the upper end of the rod R so as to partake in its movement.
valve for example and a diminution of working pressure, the motion of the piston
rod R in one direction increases the supply of fluid to the valve until uormal con-