HK20378A - Ionisation fire alarm - Google Patents
Ionisation fire alarmInfo
- Publication number
- HK20378A HK20378A HK203/78A HK20378A HK20378A HK 20378 A HK20378 A HK 20378A HK 203/78 A HK203/78 A HK 203/78A HK 20378 A HK20378 A HK 20378A HK 20378 A HK20378 A HK 20378A
- Authority
- HK
- Hong Kong
- Prior art keywords
- fire alarm
- ionisation
- ionisation fire
- alarm
- fire
- Prior art date
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
- G08B17/113—Constructional details
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/62—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating the ionisation of gases, e.g. aerosols; by investigating electric discharges, e.g. emission of cathode
- G01N27/64—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating the ionisation of gases, e.g. aerosols; by investigating electric discharges, e.g. emission of cathode using wave or particle radiation to ionise a gas, e.g. in an ionisation chamber
- G01N27/66—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating the ionisation of gases, e.g. aerosols; by investigating electric discharges, e.g. emission of cathode using wave or particle radiation to ionise a gas, e.g. in an ionisation chamber and measuring current or voltage
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Emergency Management (AREA)
- Business, Economics & Management (AREA)
- Health & Medical Sciences (AREA)
- Biochemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Electrochemistry (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Toxicology (AREA)
- Fire-Detection Mechanisms (AREA)
- Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH903568A CH475614A (en) | 1968-06-18 | 1968-06-18 | Ionization fire alarms |
Publications (1)
Publication Number | Publication Date |
---|---|
HK20378A true HK20378A (en) | 1978-04-20 |
Family
ID=4347596
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
HK203/78A HK20378A (en) | 1968-06-18 | 1978-04-13 | Ionisation fire alarm |
Country Status (11)
Country | Link |
---|---|
US (1) | US3731093A (en) |
BE (1) | BE734060A (en) |
CH (1) | CH475614A (en) |
DE (1) | DE1928874B2 (en) |
DK (1) | DK125938B (en) |
FR (1) | FR2011126A1 (en) |
GB (1) | GB1217792A (en) |
HK (1) | HK20378A (en) |
IL (1) | IL32330A (en) |
NL (1) | NL164407C (en) |
SE (1) | SE340971B (en) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH551057A (en) * | 1973-04-17 | 1974-06-28 | Cerberus Ag | IONIZATION ALARM. |
US3903419A (en) * | 1973-04-20 | 1975-09-02 | Fire Alert Company | Combustion products detector assembly and method of operation |
CA1042564A (en) * | 1974-04-18 | 1978-11-14 | Kanji Ishii | Ionization type smoke sensor |
US3959788A (en) * | 1974-05-10 | 1976-05-25 | General Signal Corporation | Ionization-type fire detector |
US4044263A (en) * | 1975-01-28 | 1977-08-23 | Walter Kidde & Company, Inc. | Ionization dual-zone static detector having single radioactive source |
US4439683A (en) * | 1981-02-11 | 1984-03-27 | General Signal Corporation | Ionization smoke detector |
US4469953A (en) * | 1982-02-02 | 1984-09-04 | Nittan Company, Limited | Combination ionization and photoelectric smoke detector |
US4529976A (en) * | 1982-10-29 | 1985-07-16 | Frederick M. Jameson | Smoke detector with masking shield |
FR2594953B1 (en) * | 1986-02-25 | 1989-05-05 | Lewiner Jacques | SMOKE DETECTOR WITH IONIZATION CHAMBER |
JPH01102991U (en) * | 1987-12-26 | 1989-07-12 | ||
US5485144A (en) * | 1993-05-07 | 1996-01-16 | Pittway Corporation | Compensated ionization sensor |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH416388A (en) * | 1962-11-19 | 1966-06-30 | Cerberus Ag | Ionization fire alarm |
US3514603A (en) * | 1966-12-22 | 1970-05-26 | Johnson Service Co | Ionization chamber detection apparatus having a low voltage source means |
US3560737A (en) * | 1967-08-02 | 1971-02-02 | Honeywell Inc | Combustion products detector using a radioactive source and detector |
-
1968
- 1968-06-18 CH CH903568A patent/CH475614A/en not_active IP Right Cessation
-
1969
- 1969-06-02 IL IL32330A patent/IL32330A/en unknown
- 1969-06-04 BE BE734060D patent/BE734060A/xx unknown
- 1969-06-06 DE DE1928874A patent/DE1928874B2/en not_active Withdrawn
- 1969-06-09 FR FR6918993A patent/FR2011126A1/fr not_active Withdrawn
- 1969-06-17 DK DK326169AA patent/DK125938B/en not_active IP Right Cessation
- 1969-06-17 SE SE08590/69A patent/SE340971B/xx unknown
- 1969-06-17 NL NL6909253.A patent/NL164407C/en not_active IP Right Cessation
- 1969-06-18 GB GB30892/69A patent/GB1217792A/en not_active Expired
-
1971
- 1971-04-05 US US00131106A patent/US3731093A/en not_active Expired - Lifetime
-
1978
- 1978-04-13 HK HK203/78A patent/HK20378A/en unknown
Also Published As
Publication number | Publication date |
---|---|
NL6909253A (en) | 1969-12-22 |
IL32330A0 (en) | 1969-08-27 |
FR2011126A1 (en) | 1970-02-27 |
DK125938B (en) | 1973-05-21 |
BE734060A (en) | 1969-11-17 |
GB1217792A (en) | 1970-12-31 |
US3731093A (en) | 1973-05-01 |
NL164407B (en) | 1980-07-15 |
DE1928874B2 (en) | 1978-03-09 |
IL32330A (en) | 1972-04-27 |
SE340971B (en) | 1971-12-06 |
DE1928874A1 (en) | 1970-01-02 |
CH475614A (en) | 1969-07-15 |
NL164407C (en) | 1980-12-15 |
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