SE331807B - - Google Patents
Info
- Publication number
- SE331807B SE331807B SE04281/67A SE428167A SE331807B SE 331807 B SE331807 B SE 331807B SE 04281/67 A SE04281/67 A SE 04281/67A SE 428167 A SE428167 A SE 428167A SE 331807 B SE331807 B SE 331807B
- Authority
- SE
- Sweden
- Prior art keywords
- capacitor
- alarm
- fire
- transistor
- circuit
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- General Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Physics & Mathematics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Emergency Management (AREA)
- Toxicology (AREA)
- Business, Economics & Management (AREA)
- Electrochemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
- Fire-Detection Mechanisms (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US53869466A | 1966-03-30 | 1966-03-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
SE331807B true SE331807B (de) | 1971-01-11 |
Family
ID=24148020
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SE04281/67A SE331807B (de) | 1966-03-30 | 1967-03-29 |
Country Status (5)
Country | Link |
---|---|
US (1) | US3462752A (de) |
CH (1) | CH465445A (de) |
DE (1) | DE1566688B2 (de) |
GB (1) | GB1154663A (de) |
SE (1) | SE331807B (de) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3657737A (en) * | 1969-12-29 | 1972-04-18 | Jeffrey E Hamm | Method of and device for smoke detection and circuits therefor |
US3728706A (en) * | 1970-09-28 | 1973-04-17 | Gen Signal Corp | System for indicating aerosols in the atmosphere |
US3838294A (en) * | 1973-09-27 | 1974-09-24 | Gen Electric | Monitor for repetitive pulse forming circuit |
US4250500A (en) * | 1979-10-22 | 1981-02-10 | Rca Corporation | Smoke detector |
US4455553A (en) * | 1982-05-17 | 1984-06-19 | Pyrotector, Inc. | Smoke detector of the ionization type |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2798213A (en) * | 1953-08-19 | 1957-07-02 | Scully Signal Co | Checking technique and system |
US3202976A (en) * | 1959-12-03 | 1965-08-24 | Scully Signal Co | Supervisory system with failure discrimination |
-
1966
- 1966-03-30 US US538694A patent/US3462752A/en not_active Expired - Lifetime
-
1967
- 1967-03-08 DE DE19671566688 patent/DE1566688B2/de active Pending
- 1967-03-14 CH CH369667A patent/CH465445A/de unknown
- 1967-03-28 GB GB03900/67A patent/GB1154663A/en not_active Expired
- 1967-03-29 SE SE04281/67A patent/SE331807B/xx unknown
Also Published As
Publication number | Publication date |
---|---|
US3462752A (en) | 1969-08-19 |
DE1566688A1 (de) | 1972-03-16 |
DE1566688B2 (de) | 1972-11-09 |
GB1154663A (en) | 1969-06-11 |
CH465445A (de) | 1968-11-15 |
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