Year: 1887

page_text: Date of Application, 19th Oct., 1887
Complete Specification Left, 19th July, 1888
Complete Specification Accepted, 19th Oct., 1888
1 LOUIS FLORIAN PILE of 11 Boulevard Barbès, Paris, France, Builder, do hereby
declare the nature of this invention to be as follows:-
My Invention relates to the stop valves of pipes for conveying steam, air, or other
fluid or liquid under pressure, and it consists
1st. In incans whereby, in the event of the pipe bursting, the passage may be
closed automatically and the supply cut off, and at the same time an alarm
given.
2nd. In so arranging the several stop valves upon the same supply pipe as to
ensure their regular action and also perimit of their being tested at any time by the
engineer.
To this end all the stop valves on the same supply pipe are connected by a pipe
which opens into the atmosphere, whereby the whole of the stop valves may be
operated from a distance and a warning given when the valves have operated.
Experience has shown that in most of the automatic stop valves of steam pipes
connecting a series of steam boilers, the reduced pressure is insufficient to ensure
their regular action, so that their efficiency cannot be depended upon. By means
of this invention perfect security is obtained, while it also permits, whatever may be
the system of valve used (whether automatic or not) of the valves being operated
from a distance. The arrangement of the valve is thus independent of the mode
of application, but I will proceed to describe the latter in connection with a
system of automatic stop valve which appears to give the best results, reference
being had to the accompanying drawing wherein Figure 1 shows three different
arrangements of automatic stop valves on the same principle. Figures and 3
show on an enlarged scale self acting stop valves similar to those shown in Figure 1,
but provided with an alarm.
The stop valve consists essentially of a piston P moving in a cylinder F, the said
piston being formed in one with any suitable valve or cock, or with an obturator P¹,

page_text: (is a steam passage communicating with cylinder F, and K a pipe of indefinite
length which is of larger diameter than the passage and is furnished with a
cock R.
The following is the action :-The steam circulating in A A¹ passes through the
passage and fills chamber F and also pipe K. If now cock R be opened a portion
of the steam will escape, the pressure in pipe K and chamber F will be reduced and
the piston will, owing to the difference of pressure on its opposite sides, be moved to
the position shown in the drawings and the valve or obturator Pt will close the passage
from A to A. It will be understood that this arrangement is applicable to water or
compressed air pipes, or to pipes conveying other fluid under pressure.
Referring to Figures 2 and 3, P is the piston and P¹ the valve for cutting off the
passage of the steam from A to A¹. The cock for placing the stop valve in communi-
cation with pipe K is fixed at R'. The rod T of piston P is prolonged beyond the
casing and provided with a whistle to give an alarm when the passage for the steam is
cut off. This automatic stop valve is applicable in whichever direction the steam is
passing. Thus in Figure 2 the steam passes from A to A¹ and through passage C,
the double piston valve S is in the position shown at back of piston P and maintains
its equilibrium so that, in the event of the pipe bursting, the steam will escape from
the hack of the piston through passage C and the piston P will be suddenly moved,
carrying with it the valve P which will cut off the supply.
If the steam passes in the other direction, that is, from A¹ to A, the double piston
valve S is moved to its other extreme position and the steam will escape by the
passage C instead of by the passage C, the action being the same in both cases.
In Figure 3 the steam passing from A to A¹ lifts valves CC, the first closing and
the second remaining open in case of the pipe bursting, while, if the steam passes in
the other direction, the valves D D' act in a similar manner.
Dated this 19th day of October 1887.
L. F. PILE.
By A. M. & Wm. Clark,
53, Chancery Lane, London,
Patent Agents.

page_text: 1st. In the combination with the valve of means whereby in the event of the pipe
bursting the valve shall be closed automatically and an alarin shall at the same time
be given.
2nd. In so arranging the several stop valves upon the same pipe as to ensure their
proper working and in providing means whereby the valves may be tested at any
time from a distance.
The first object is attained by combining a piston or pistons with the valve as here-
after described, and for the purposes of the second object all the stop valves on the
same pipe are connected by a pipe which opens into the atmosphere whereby the whole
of the stop valves may be operated from a distance by means of a cock under the hand
of the engineer and whereby a warning will be given when the valves have operated
automatically.
Experience has shewn that in most of the automatic stop valves of steam pipes
connecting a series of steam boilers, the reduction of pressure is insufficient to ensure
their regular action, so that their efficiency cannot be depended upon. By means of
this invention, perfect security is obtained while it also permits, whatever may be the
system of valve used (whether automatic or not) of the valves being operated from
a distance. The arrangement of the valve is thus independent of this mode of working
them, but I will proceed to describe the latter in connection with a system of automatic
stop valve which appears to give the best results, reference- being had to the accom-
panying drawing wherein figure 1 shews three different arrangements of automatic
stop valves on the same principle. Figure 1 shews another arrangement of the same
valve. Figures 2 and 3, shew on an enlarged scale self acting stop valves similar to
those shewn in figure 1 but provided with an alarm.
The stop valve represented in figure 1, consists essentially of a piston P moving in
a cylinder F which piston may, or may not, be attached to any suitable valve or cock.
In the example shewn, it is attached to a piston valve P¹ moving in a cylinder F1.
C is a steam passage communicating with the outer end of cylinder F, and K a pipe

page_text: of indefinite length which is of larger diameter than the passage () and which commu-
nicates with the same end of cylinder F, and is furnished with a cock R.
C¹ is a
similar passage to C connecting pipe A with the outer end of cylinder F.
The action is as follows:-The steam (or other fluid) circulating from A to A¹
passes through the passage C and fills cylinder F and also pipe K. If now cock R be
opened, a portion of the steam will escape, the pressure in pipe K and cylinder F will
be reduced, and the piston will, owing to the difference of pressure on its opposite
sides, be moved to the position shewn in the drawings and close the passage
from A to A¹ by means of the piston valve P¹. In order to open the valve, the cock X
on each valve is opened by hand, so as to reduce the pressure in front of the piston
valve P¹, whereupon the increased pressure on the opposite face causes the opening of
the valve. The cocks X may communicate with a common pipe in a similar manner
to cocks R¹, so as to enable the whole of the valves to be opened simultaneously in the
same manner as they are closed.
Referring to figures 2 and 3, P is the piston and P¹ the piston valve for cutting off
the passage of the steam from A to A¹. The connection of the pipe K with the stop
valve is at R¹. The rod T of the piston P is prolonged beyond the casing and pro-
vided with a passage forming an alarm to notify when the passage for the steam is
cut off. This automatic stop valve is applicable in whichever direction the steam, is
passing. In figure 2, the steam passes from A to A¹ and through passage C, the
double piston valve S at back of piston P being in the position shewn and maintain-
ing the piston P in equilibrium so that in the event of the pipe bursting, the steam
will escape from behind the piston through passage C and the piston P will be
suddenly moved carrying with it the valve P which will cut off the passage A. A.
If the steam passes in the other direction, that is, from A¹ to A, the double piston
valve S is moved to its other extreme position, and the steam will escape by the
passage instead of by the passage C, the action being the same in both cases.
In this arrangement of valve, the passages C C are terminated by nozzles t t whose
orifices may be varied in position for the purpose of varying the sensitiveness of the
valve to the circulating fluid. Further, in order to avoid risk of a too sudden closure,
especially when the valve is applied to water pipes, I provide the piston P with a
central cone M which enters a corresponding cavity N in the end of cylinder F and
throttles the passage of the water at the end of the stroke of the piston.
In figure 3, the steam passing from A to A¹ lifts valves C C the first closing and
the second remaining open in case of the pipe bursting while if the steam passes in the
other direction the valves D D act in a similar manner.
Figure 1 shows the apparatus as arranged for use whether as a cock, stop-valve
or check valve. P is an independent piston valve which may be closed on its seat by
means of a screw S. P¹ is a valve connected to a piston P so that both move together
as one, the upper face of said piston being prevented from coming close against the
diaphragm U. The valve P may be moved by means of the rod V provided with a
whistle, as before described. The chamber in which piston P works is provided with
a purge cock in addition to cock R¹ by which it is put in communication with the
pipe K before described with reference to figure 1.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to he performed, I declare that what I
claim is
1st. The system of operating from a distance a number of stop valves upon steam
or other pipes by means of a pipe K provided with a cock R whereby it may be opened
to the atmosphere as and for the purpose specified.
2nd. A stop-valve acting in either direction constructed of a double piston or cou-
bined valves moving in the cylinders F F¹ connected by lateral passages C(1 with the
main pipe, said passages being fitted or not with valves, as described and represented
in figures 2 and 3 of the drawings.
3rd. An automatic stop valve constructed of a double piston P P¹ moving in

page_text: cylinders F F in combination with passages C C and the double auxiliary piston S
working in the end of cylinder F as described and illustrated with reference to figure 2.
4th. The combined cock, stop and check valve consisting in the combination of an
independent valve P, screw S, double piston P¹ p" and alarm V, as described
with reference to figure 1bls.
L. F. PILE.
By A. M. & Wm. Clark,
53, Chancery Lane, London,
Patent Agents.