FR2111743A1 - - Google Patents
Info
- Publication number
- FR2111743A1 FR2111743A1 FR7137624A FR7137624A FR2111743A1 FR 2111743 A1 FR2111743 A1 FR 2111743A1 FR 7137624 A FR7137624 A FR 7137624A FR 7137624 A FR7137624 A FR 7137624A FR 2111743 A1 FR2111743 A1 FR 2111743A1
- Authority
- FR
- France
- 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.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B29/00—Checking or monitoring of signalling or alarm systems; Prevention or correction of operating errors, e.g. preventing unauthorised operation
- G08B29/18—Prevention or correction of operating errors
- G08B29/185—Signal analysis techniques for reducing or preventing false alarms or for enhancing the reliability of the system
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B25/00—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems
- G08B25/01—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium
- G08B25/04—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium using a single signalling line, e.g. in a closed loop
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Computer Security & Cryptography (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Fire Alarms (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19702051644 DE2051644C2 (en) | 1970-10-21 | Device for avoiding false alarms in fire alarm systems | |
| DE2051649A DE2051649C2 (en) | 1970-10-21 | 1970-10-21 | Circuit arrangement for avoiding false alarms in fire alarm systems |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2111743A1 true FR2111743A1 (en) | 1972-06-09 |
| FR2111743B1 FR2111743B1 (en) | 1975-09-26 |
Family
ID=25759936
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR7137624A Expired FR2111743B1 (en) | 1970-10-21 | 1971-10-20 |
Country Status (8)
| Country | Link |
|---|---|
| AT (1) | AT312471B (en) |
| BE (1) | BE774246A (en) |
| CH (1) | CH531226A (en) |
| DD (1) | DD97080A5 (en) |
| FR (1) | FR2111743B1 (en) |
| GB (1) | GB1338470A (en) |
| IT (1) | IT940037B (en) |
| SE (1) | SE369793B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0071752A1 (en) * | 1981-07-02 | 1983-02-16 | Nohmi Bosai Kogyo Co., Ltd. | Fire alarm system |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108629950B (en) * | 2018-04-08 | 2021-01-19 | 浙江警察学院 | ESP 8266-based intermittent smoke detection alarm device |
| CN114180081A (en) * | 2021-11-19 | 2022-03-15 | 中国直升机设计研究所 | Helicopter light-sensitive fire alarm detection and logic judgment method |
| CN116863675B (en) * | 2023-07-28 | 2025-12-26 | 郑州畅威物联网科技有限公司 | Methods, systems, equipment, and media for distinguishing between true and false gas alarms. |
-
1971
- 1971-10-14 GB GB4785971A patent/GB1338470A/en not_active Expired
- 1971-10-20 DD DD15843671A patent/DD97080A5/xx unknown
- 1971-10-20 SE SE1328071A patent/SE369793B/xx unknown
- 1971-10-20 CH CH1529771A patent/CH531226A/en not_active IP Right Cessation
- 1971-10-20 FR FR7137624A patent/FR2111743B1/fr not_active Expired
- 1971-10-20 IT IT7045571A patent/IT940037B/en active
- 1971-10-21 AT AT910871A patent/AT312471B/en not_active IP Right Cessation
- 1971-10-21 BE BE774246A patent/BE774246A/en unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0071752A1 (en) * | 1981-07-02 | 1983-02-16 | Nohmi Bosai Kogyo Co., Ltd. | Fire alarm system |
Also Published As
| Publication number | Publication date |
|---|---|
| CH531226A (en) | 1972-11-30 |
| SE369793B (en) | 1974-09-16 |
| DD97080A5 (en) | 1973-04-12 |
| IT940037B (en) | 1973-02-10 |
| BE774246A (en) | 1972-02-14 |
| FR2111743B1 (en) | 1975-09-26 |
| GB1338470A (en) | 1973-11-21 |
| AT312471B (en) | 1974-01-10 |
Similar Documents
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ST | Notification of lapse |