FR2090086B1 - - Google Patents
Info
- Publication number
- FR2090086B1 FR2090086B1 FR7117530A FR7117530A FR2090086B1 FR 2090086 B1 FR2090086 B1 FR 2090086B1 FR 7117530 A FR7117530 A FR 7117530A FR 7117530 A FR7117530 A FR 7117530A FR 2090086 B1 FR2090086 B1 FR 2090086B1
- 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.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B17/00—Fire alarms; Alarms responsive to explosion
- G08B17/10—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means
- G08B17/11—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means using an ionisation chamber for detecting smoke or gas
Landscapes
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Fire-Detection Mechanisms (AREA)
- Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2024116 | 1970-05-16 | ||
DE19712121382 DE2121382A1 (en) | 1971-04-30 | 1971-04-30 | Iomsations fire alarm |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2090086A1 FR2090086A1 (en) | 1972-01-14 |
FR2090086B1 true FR2090086B1 (en) | 1975-01-17 |
Family
ID=25759156
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7117530A Expired FR2090086B1 (en) | 1970-05-16 | 1971-05-14 |
Country Status (9)
Country | Link |
---|---|
US (1) | US3795904A (en) |
AR (1) | AR199378A1 (en) |
BE (1) | BE767246A (en) |
CA (1) | CA948332A (en) |
CH (1) | CH539310A (en) |
ES (1) | ES197895Y (en) |
FR (1) | FR2090086B1 (en) |
GB (1) | GB1329475A (en) |
NO (1) | NO129270B (en) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3906474A (en) * | 1973-05-07 | 1975-09-16 | Fire Alert Company | Combustion products alarm |
FR2402256A1 (en) * | 1977-08-29 | 1979-03-30 | Debard Robert | Fire detector and alarm system - has two radioactive ionisation chambers connected to resistances to form wheatstone bridge |
US4208655A (en) * | 1978-02-21 | 1980-06-17 | Westinghouse Electric Corp. | Protective system for electrical apparatus |
USRE30620E (en) * | 1978-07-03 | 1981-05-19 | P. R. Mallory & Co. Inc. | High output smoke and heat detector alarm system utilizing a piezoelectric transducer and a voltage doubling means |
ZA786519B (en) * | 1978-11-20 | 1980-02-27 | Anglo Amer Corp South Africa | Detector |
US4383253A (en) * | 1979-01-29 | 1983-05-10 | International Quartz Ltd. | Ionization smoke detector |
US4270123A (en) * | 1979-02-26 | 1981-05-26 | Universal Det, S.A.R.L. | Detector for indicating a fire or detector malfunction |
DE3004753C2 (en) * | 1980-02-08 | 1983-12-22 | Hartwig Dipl.-Ing. 2409 Scharbeutz Beyersdorf | Fire alarm device |
US5189399A (en) * | 1989-02-18 | 1993-02-23 | Hartwig Beyersdorf | Method of operating an ionization smoke alarm and ionization smoke alarm |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2950387A (en) * | 1957-08-16 | 1960-08-23 | Bell & Howell Co | Gas analysis |
NL224264A (en) * | 1957-10-24 | |||
LU48167A1 (en) * | 1965-03-11 | 1966-09-12 | Applic Electroniques Ets | |
FR1494089A (en) * | 1965-03-11 | 1967-09-08 | Pour Applic Electroniques Ets | Circuit for detecting and measuring signals, in particular signals derived from the ionization of a medium, particularly a gaseous medium |
CH446131A (en) * | 1966-02-22 | 1967-10-31 | Cerberus Ag | Ionization fire alarm system |
CH497755A (en) * | 1969-06-24 | 1970-10-15 | Cerberus Ag | Ionization fire alarms |
-
1971
- 1971-05-12 NO NO01806/71A patent/NO129270B/no unknown
- 1971-05-13 US US00142892A patent/US3795904A/en not_active Expired - Lifetime
- 1971-05-14 CA CA113,051A patent/CA948332A/en not_active Expired
- 1971-05-14 CH CH717471A patent/CH539310A/en not_active IP Right Cessation
- 1971-05-14 FR FR7117530A patent/FR2090086B1/fr not_active Expired
- 1971-05-14 ES ES1971197895U patent/ES197895Y/en not_active Expired
- 1971-05-17 GB GB1528571*[A patent/GB1329475A/en not_active Expired
- 1971-05-17 BE BE767246A patent/BE767246A/en unknown
- 1971-05-17 AR AR235587A patent/AR199378A1/en active
Also Published As
Publication number | Publication date |
---|---|
CH539310A (en) | 1973-07-15 |
NO129270B (en) | 1974-03-18 |
US3795904A (en) | 1974-03-05 |
FR2090086A1 (en) | 1972-01-14 |
BE767246A (en) | 1971-11-17 |
CA948332A (en) | 1974-05-28 |
ES197895Y (en) | 1975-10-01 |
ES197895U (en) | 1975-05-01 |
AR199378A1 (en) | 1974-08-30 |
GB1329475A (en) | 1973-09-12 |
Similar Documents
Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |