FR2396370A1 - Fire detection and alarm system - uses detectors for fluid pressure variation in enclosure and has one responsive to pressure variation - Google Patents
Fire detection and alarm system - uses detectors for fluid pressure variation in enclosure and has one responsive to pressure variationInfo
- Publication number
- FR2396370A1 FR2396370A1 FR7719993A FR7719993A FR2396370A1 FR 2396370 A1 FR2396370 A1 FR 2396370A1 FR 7719993 A FR7719993 A FR 7719993A FR 7719993 A FR7719993 A FR 7719993A FR 2396370 A1 FR2396370 A1 FR 2396370A1
- Authority
- FR
- France
- Prior art keywords
- pressure variation
- enclosure
- pressure
- responsive
- alarm system
- 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.)
- Withdrawn
Links
Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
- G08B13/20—Actuation by change of fluid pressure
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B17/00—Fire alarms; Alarms responsive to explosion
- G08B17/04—Hydraulic or pneumatic actuation of the alarm, e.g. by change of fluid pressure
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
The system uses an enclosure (5) fitted with equipment for pressurising a fluid contained in the enclosure. The pressure introduced is greater than ambient when there is no fire. The system has detectors (6, 7) including a pressure variation detector. These detectors react, to control the operation of a fire alarm, to any pressure which varies with at least a determined rate. A min. pressure detector reacts to control alarm operation for any fall in pressure below a min. safe operating value lower than the normal pressure in the absence of fire.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7719993A FR2396370A1 (en) | 1977-06-29 | 1977-06-29 | Fire detection and alarm system - uses detectors for fluid pressure variation in enclosure and has one responsive to pressure variation |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7719993A FR2396370A1 (en) | 1977-06-29 | 1977-06-29 | Fire detection and alarm system - uses detectors for fluid pressure variation in enclosure and has one responsive to pressure variation |
Publications (1)
Publication Number | Publication Date |
---|---|
FR2396370A1 true FR2396370A1 (en) | 1979-01-26 |
Family
ID=9192733
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7719993A Withdrawn FR2396370A1 (en) | 1977-06-29 | 1977-06-29 | Fire detection and alarm system - uses detectors for fluid pressure variation in enclosure and has one responsive to pressure variation |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR2396370A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10002508B2 (en) | 2016-02-10 | 2018-06-19 | Kidde Technologies, Inc. | Pneumatic fire detectors |
-
1977
- 1977-06-29 FR FR7719993A patent/FR2396370A1/en not_active Withdrawn
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10002508B2 (en) | 2016-02-10 | 2018-06-19 | Kidde Technologies, Inc. | Pneumatic fire detectors |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |