GB1378810A - Pressure alarm systems - Google Patents
Pressure alarm systemsInfo
- Publication number
- GB1378810A GB1378810A GB4725472A GB4725472A GB1378810A GB 1378810 A GB1378810 A GB 1378810A GB 4725472 A GB4725472 A GB 4725472A GB 4725472 A GB4725472 A GB 4725472A GB 1378810 A GB1378810 A GB 1378810A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pressure
- comparator
- produces
- signal
- potentiometer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/0006—Controlling or regulating processes
- B01J19/002—Avoiding undesirable reactions or side-effects, e.g. avoiding explosions, or improving the yield by suppressing side-reactions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D90/00—Component parts, details or accessories for large containers
- B65D90/22—Safety features
- B65D90/32—Arrangements for preventing, or minimising the effect of, excessive or insufficient pressure
- B65D90/34—Venting means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J2219/00049—Controlling or regulating processes
- B01J2219/00245—Avoiding undesirable reactions or side-effects
- B01J2219/0027—Pressure relief
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/7722—Line condition change responsive valves
- Y10T137/7758—Pilot or servo controlled
- Y10T137/7761—Electrically actuated valve
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
1378810 Pressure alarm systems H LIST 13 Oct 1972 [4 Nov 1971] 47254/72 Heading G1N The pressure and rate of change of pressure inside a closed container are monitored to energize protective devices when the combined signals indicate the approach of an explosive condition. The pressure signal, obtained by a transducer 1, Fig. 2, is compared at 8 with a limiting value set up on a potentiometer 21, and its rate of change, obtained by differentiating unit 5, is compared at 7 with a limiting value set up on a potentiometer 16. Each comparator 7, 8 produces a pulse output when the test input is excessive. When both comparators produce an output signal, an AND gate 22 energizes a monostable switching unit 23 to produce at 27 a signal for energizing control apparatus for e.g. inhibiting the explosion or actuating fire extinguishers. For use with containers in which a thermo-chemical reaction is taking place, a bi-stable switching unit 31 is operated when the comparator 8 produces a pulse output and comparator 7 produces zero output. The transducer 1 may be provided with means for coupling it to a calibrated source of pressure Figs. 3 and 4, (not shown).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT953771A AT314427B (en) | 1971-11-04 | 1971-11-04 | Device for combating reactions associated with an impermissible increase in pressure in large containers |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1378810A true GB1378810A (en) | 1974-12-27 |
Family
ID=3615040
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4725472A Expired GB1378810A (en) | 1971-11-04 | 1972-10-13 | Pressure alarm systems |
Country Status (6)
Country | Link |
---|---|
US (1) | US3775622A (en) |
AT (1) | AT314427B (en) |
CH (1) | CH544911A (en) |
DE (1) | DE2250166B2 (en) |
FR (1) | FR2160012A5 (en) |
GB (1) | GB1378810A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2290872A (en) * | 1994-06-30 | 1996-01-10 | Caterpillar Inc | Predictive fault detection system |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3408970C1 (en) * | 1984-03-12 | 1985-07-11 | Winfred 8000 München Klink | Pressure-sensitive sensor device for a danger signal transmitter |
DE3427204C2 (en) * | 1984-07-24 | 1987-03-26 | Voith Turbo Gmbh & Co Kg, 7180 Crailsheim | Valve arrangement for controlling the flow of flowing media |
US4777383A (en) * | 1987-06-01 | 1988-10-11 | Ldi Pneutronics Corp. | Electrically controlled variable pressure pneumatic circuit |
US5396923A (en) * | 1992-10-28 | 1995-03-14 | Allen; Donald M. | Surge relief apparatus and method |
US6031462A (en) * | 1998-11-03 | 2000-02-29 | Fike Corporation | Rate of rise detector for use with explosion detection suppression equipment |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3402972A (en) * | 1966-08-11 | 1968-09-24 | Gen Electric | Continuous pressure control system |
US3628563A (en) * | 1968-12-10 | 1971-12-21 | Tokyo Shibaura Electric Co | Explosion detecting means for a fluid pipeline |
US3665945A (en) * | 1971-02-03 | 1972-05-30 | M & J Valve Co | Valve control system and method |
BE789975A (en) * | 1971-10-12 | 1973-02-01 | Sanders Associates Inc | PRESSURE AND FLOW CONTROL VALVE |
US3726307A (en) * | 1971-12-09 | 1973-04-10 | Cameron Iron Works Inc | Pressure control apparatus |
-
1971
- 1971-11-04 AT AT953771A patent/AT314427B/en not_active IP Right Cessation
-
1972
- 1972-10-04 CH CH1451272A patent/CH544911A/en not_active IP Right Cessation
- 1972-10-13 GB GB4725472A patent/GB1378810A/en not_active Expired
- 1972-10-13 DE DE19722250166 patent/DE2250166B2/en not_active Withdrawn
- 1972-10-20 US US00299405A patent/US3775622A/en not_active Expired - Lifetime
- 1972-11-03 FR FR7238983A patent/FR2160012A5/fr not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2290872A (en) * | 1994-06-30 | 1996-01-10 | Caterpillar Inc | Predictive fault detection system |
GB2290872B (en) * | 1994-06-30 | 1998-07-08 | Caterpillar Inc | Method and apparatus for indicating a fault condition |
Also Published As
Publication number | Publication date |
---|---|
AT314427B (en) | 1974-04-10 |
US3775622A (en) | 1973-11-27 |
FR2160012A5 (en) | 1973-06-22 |
CH544911A (en) | 1973-11-30 |
DE2250166A1 (en) | 1973-05-17 |
DE2250166B2 (en) | 1976-11-25 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |