GB1492193A - Fire detectors - Google Patents

Fire detectors

Info

Publication number
GB1492193A
GB1492193A GB34390/75A GB3439075A GB1492193A GB 1492193 A GB1492193 A GB 1492193A GB 34390/75 A GB34390/75 A GB 34390/75A GB 3439075 A GB3439075 A GB 3439075A GB 1492193 A GB1492193 A GB 1492193A
Authority
GB
United Kingdom
Prior art keywords
support
aug
cavity
electronic circuitry
grid
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
Application number
GB34390/75A
Other languages
English (en)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Anglo American Corp of South Africa Ltd
Original Assignee
Anglo American Corp of South Africa Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Anglo American Corp of South Africa Ltd filed Critical Anglo American Corp of South Africa Ltd
Publication of GB1492193A publication Critical patent/GB1492193A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Analytical Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Business, Economics & Management (AREA)
  • Biochemistry (AREA)
  • Emergency Management (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Fire-Detection Mechanisms (AREA)
  • Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
  • Control Of Combustion (AREA)
  • Sampling And Sample Adjustment (AREA)
  • Fire Alarms (AREA)
GB34390/75A 1974-08-26 1975-08-19 Fire detectors Expired GB1492193A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ZA00745453A ZA745453B (en) 1974-08-26 1974-08-26 Improvements in or relating to fire detectors

Publications (1)

Publication Number Publication Date
GB1492193A true GB1492193A (en) 1977-11-16

Family

ID=25568066

Family Applications (1)

Application Number Title Priority Date Filing Date
GB34390/75A Expired GB1492193A (en) 1974-08-26 1975-08-19 Fire detectors

Country Status (21)

Country Link
JP (1) JPS5635236B2 (fi)
AU (1) AU501762B2 (fi)
BE (1) BE832768A (fi)
BR (1) BR7505431A (fi)
CA (1) CA1042088A (fi)
CH (1) CH600455A5 (fi)
DE (1) DE2537598C3 (fi)
DK (1) DK136793B (fi)
FR (1) FR2283492A1 (fi)
GB (1) GB1492193A (fi)
IE (1) IE41452B1 (fi)
IN (1) IN143233B (fi)
IT (1) IT1042015B (fi)
LU (1) LU73252A1 (fi)
NL (1) NL167785C (fi)
NO (1) NO138307C (fi)
PH (1) PH11514A (fi)
SE (1) SE439209B (fi)
SU (1) SU703038A3 (fi)
YU (1) YU37410B (fi)
ZA (1) ZA745453B (fi)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2711457C2 (de) * 1977-03-16 1985-06-27 Siemens AG, 1000 Berlin und 8000 München Ionisationsbrandmelder
CH681932A5 (fi) * 1990-12-04 1993-06-15 Cerberus Ag
CH682423A5 (de) * 1991-03-13 1993-09-15 Asea Brown Boveri Verfahren und Vorrichtung zur Messung der Konzentration von in einem Gas befindlichen Partikeln.
DE102004020489B4 (de) * 2004-04-26 2007-06-28 Minimax Gmbh & Co. Kg Brandmelder für Einsatz in Außenatmosphäre
CN110185461A (zh) * 2019-06-28 2019-08-30 中交路桥建设有限公司 实时探测隧道地质条件的盾构机

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2408051A (en) * 1942-04-04 1946-09-24 American District Telegraph Co Fire and smoke detector and the like
DE2204930C3 (de) * 1971-02-08 1974-06-20 Veb Rft Messelektronik Otto Schoen, X 8016 Dresden Ionisationsfeuermelder
JPS485979U (fi) * 1971-06-04 1973-01-23

Also Published As

Publication number Publication date
IE41452B1 (en) 1980-01-02
AU8412175A (en) 1977-02-24
SU703038A3 (ru) 1979-12-05
IN143233B (fi) 1977-10-22
NO752918L (fi) 1976-02-27
YU37410B (en) 1984-08-31
FR2283492B1 (fi) 1979-05-04
JPS5635236B2 (fi) 1981-08-15
BE832768A (fr) 1975-12-16
CH600455A5 (fi) 1978-06-15
SE7509478L (sv) 1976-02-27
NO138307C (no) 1978-08-16
YU216775A (en) 1983-04-27
DE2537598B2 (de) 1980-11-06
DK384275A (fi) 1976-02-27
FR2283492A1 (fr) 1976-03-26
IE41452L (en) 1976-02-26
DE2537598C3 (de) 1984-12-20
ZA745453B (en) 1976-04-28
NL7509918A (nl) 1976-03-01
DK136793C (fi) 1978-04-24
NL167785B (nl) 1981-08-17
IT1042015B (it) 1980-01-30
BR7505431A (pt) 1976-08-03
PH11514A (en) 1978-02-01
DE2537598A1 (de) 1976-03-11
LU73252A1 (fi) 1976-05-31
SE439209B (sv) 1985-06-03
NO138307B (no) 1978-05-02
DK136793B (da) 1977-11-21
CA1042088A (en) 1978-11-07
AU501762B2 (en) 1979-06-28
NL167785C (nl) 1982-01-18
JPS5149784A (fi) 1976-04-30

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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