Improvements in Safety Devices for Vessels Oharged with Fluids under Pressure.
Year: 1896

page_text: Date of Application, 26th Aug., 1896
Complete Specification Left, 2 th May, 1897-Accepted, 26th June, 1897
PROVISIONAL SPECIFICATION.
Improvements in Safety Devices for Vessels Oharged with Fluids
under Pressure.
I, VICTOR ERNEST DURAFORT, Fils, of 162 Boulevard Voltaire, Paris,
France, Engineer, do hereby declare the nature of this invention to be as
follows:-
This invention relates to a safety device or valve for preventing explosion of
vessels containing gases under pressure, should too sudden expansion of these
gases, from any external cause, compel the wall of the vessel to sustain a pressure
bordering on the limit of resistance.
The apparetus comprises a plug screwed into the gas vessel and containing a
metallic diaphragm whose lower face is directly subject to the action of the
pressure of the gas exerting itself through a suitable opening.
This diaphragm is so calculated as to be capable of supporting the limit of
ordinary pressure. In the plug is inserted a hollow steel rod having a central
passage, a conical end or nozzle with a cutting edge, and lateral openings in the
nozzle. The cutting edge of said rod rests upon the metallic diaphragm.
A nut, and a lacking nut, are screwed upon the hollow rod, and a washer is
laid on the locking nut and is held in place, as is also the rod, by a perforated
dome shaped cap. The whole is covered and protected by a cylindro-spherical
casing perforated to allow passage to the escaping gas.
When, from any cause whatever, the internal pressure of the gas confined in
the vessel increases unduly, the diaphragm is first bulged out of shape and is
then cut, as by a punch, by the hollow rod. The gas is consequently free to
escape through the orifices in the nozzle and through those of the dome-shaped
cap and the casing. The device thus offers a weak point (coustituted by the
metallic diaphragm) the resistance of which can be calculated to support the
ordinary or normal pressures, whilst being lower than the limit pressures which
can be supported by the wall of the vessel.
Dated this 26th day of August 1896.
LETE SPECIFICATION.
Improvements in Safety Devices for Vessels Charged with Fluids
under Pressure.
I, VICTOR ERNEST DURAFORT, Fils, of 162, Boulevard Voltaire, Paris,
France, 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 statement, relerence being had to the accompanying
drawings and to the letters and figures marked thereon, that is to say :-
This invention relates to a safety device or valve for preventing explosion of

page_text: vessels containing gases under pressure, should too sudden expansion of these
gases, from any external cause, compel the walls of the vessel to sustain a pressure
bordering on the limit of resistance.
My invention will be readily understood on reference to the accompanying
drawings, in which:
Fig. 1 is a vertical section of one form of my safety device, adapted to be fixed
either directly on the vessel containing the gases, or to a suitable part on the gas
supplying, or drawing off, recipient used in connection with the vessel.
Fig. 2 is a similar section of a slightly modified safety device constructed
according to my invention.
The device or apparatus comprises a plug B, which is screwed into the gas
vessel, containing a metallic diaphragm m whose lower face is directly subjected to
the action of the pressure of the gas exerting itself through a suitablo opening o.
This diaphragm is so calculated as to be capable of supporting the limit of
ordinary pressure. In the plug B is inserted a cutting steel rod T having a
central passage, a conical end or nozzle a, with a cutting edge, and lateral
openings in the nozzle. The cutting edge of said rod rests upon the metallic
diaphragm m.
A nut and a locking nut E are screwed upou the hollow rod T, and a
washer Ris placed upon the locking nut E and is held in placo, as is also the
rod T, by a perforated dome-shaped cap C. The whole is covered and protected
by a cylindro-spherical casing D perforated to allow passage to the escaping gas.
When, from any cause whatever, the internal pressure of the gas confined in the
vessel increases unduly, the diaphragm m is first bulged out of shape and is then
cut, as if by a punch, by the hollow rod T. The gas is consequently free to
escape through the orifices n, a, and through those of the cap C and casing D.
The device thus offers a weak point (constituted by the metallic diaphragm m) the
resistance of which can be calculated to support the ordinary or normal pressures
whilst being lower than the limit pressures which can be supported by the wall of
the vessel.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same may be performed 1 declare that I claim:
1. The application to vessels containing fluids under high pressure, of a safety
device or valve comprising essentially a diaphragm which under the influence of
abnormal pressures is first bulged out of shape and then torn and cut by a fixed
obstruction, thereby allowing the fluid to escape before the pressure becomes
dangerous for the vessel, substantially as described.
2. The improved safety device or valve substantially as described and shewn
with reference to Fig. 1 of the drawings, or modified as shown with reference to
Fig. 2 thereof.
ليم
ERNEST DE PASS,
Chartered Patent Agent,
78, Fleet Street, London, and 54 Market Street, Nottingham,
Agent for the Applicant.