GB1259437A - - Google Patents
Info
- Publication number
- GB1259437A GB1259437A GB1259437DA GB1259437A GB 1259437 A GB1259437 A GB 1259437A GB 1259437D A GB1259437D A GB 1259437DA GB 1259437 A GB1259437 A GB 1259437A
- Authority
- GB
- United Kingdom
- Prior art keywords
- ionization
- gate
- drain
- ionization chamber
- nittan
- 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.)
- 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
-
- 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)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Electrochemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (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 |
---|---|---|---|
JP44031475A JPS529998B1 (pt) | 1969-04-25 | 1969-04-25 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1259437A true GB1259437A (pt) | 1972-01-05 |
Family
ID=12332275
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1259437D Expired GB1259437A (pt) | 1969-04-25 | 1970-02-24 |
Country Status (5)
Country | Link |
---|---|
US (1) | US3676678A (pt) |
JP (1) | JPS529998B1 (pt) |
DE (1) | DE2019791B2 (pt) |
GB (1) | GB1259437A (pt) |
NL (1) | NL7002577A (pt) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2711457C2 (de) * | 1977-03-16 | 1985-06-27 | Siemens AG, 1000 Berlin und 8000 München | Ionisationsbrandmelder |
EP0011364B1 (en) * | 1978-09-29 | 1983-05-18 | Chubb Fire Limited | Heat detector circuit |
ZA786519B (en) * | 1978-11-20 | 1980-02-27 | Anglo Amer Corp South Africa | Detector |
US5189399A (en) * | 1989-02-18 | 1993-02-23 | Hartwig Beyersdorf | Method of operating an ionization smoke alarm and ionization smoke alarm |
DE3904979A1 (de) * | 1989-02-18 | 1990-08-23 | Beyersdorf Hartwig | Verfahren zum betrieb eines ionisationsrauchmelders und ionisationsrauchmelder |
EP0423489A1 (de) * | 1989-09-15 | 1991-04-24 | Cerberus Ag | Brandmeldeanlage mit Ueberwachung |
US6683319B1 (en) | 2001-07-17 | 2004-01-27 | Mitec Incorporated | System and method for irradiation with improved dosage uniformity |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DK101900C (da) * | 1961-12-30 | 1965-06-08 | Danske Securitas As | Elektrisk alarmanlæg, fortrinsvis til brandalarmering. |
-
1969
- 1969-04-25 JP JP44031475A patent/JPS529998B1/ja active Pending
-
1970
- 1970-02-10 US US10158A patent/US3676678A/en not_active Expired - Lifetime
- 1970-02-24 GB GB1259437D patent/GB1259437A/en not_active Expired
- 1970-02-24 NL NL7002577A patent/NL7002577A/xx unknown
- 1970-04-23 DE DE19702019791 patent/DE2019791B2/de active Pending
Also Published As
Publication number | Publication date |
---|---|
JPS529998B1 (pt) | 1977-03-19 |
DE2019791A1 (de) | 1970-11-05 |
US3676678A (en) | 1972-07-11 |
NL7002577A (pt) | 1970-10-27 |
DE2019791B2 (de) | 1972-03-30 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
PCNP | Patent ceased through non-payment of renewal fee |