NO115947B - - Google Patents

Info

Publication number
NO115947B
NO115947B NO153215A NO15321564A NO115947B NO 115947 B NO115947 B NO 115947B NO 153215 A NO153215 A NO 153215A NO 15321564 A NO15321564 A NO 15321564A NO 115947 B NO115947 B NO 115947B
Authority
NO
Norway
Prior art keywords
output
electrodes
impedance
fire detector
detector according
Prior art date
Application number
NO153215A
Other languages
English (en)
Norwegian (no)
Inventor
L Blevins
Original Assignee
B R K Electronics Inc
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 B R K Electronics Inc filed Critical B R K Electronics Inc
Publication of NO115947B publication Critical patent/NO115947B/no

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING SYSTEMS, e.g. PERSONAL 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
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING SYSTEMS, e.g. PERSONAL 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)
  • Analytical Chemistry (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
NO153215A 1963-05-24 1964-05-12 NO115947B (https=)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US283070A US3245067A (en) 1963-05-24 1963-05-24 Detection of products of combustion

Publications (1)

Publication Number Publication Date
NO115947B true NO115947B (https=) 1968-12-30

Family

ID=23084365

Family Applications (1)

Application Number Title Priority Date Filing Date
NO153215A NO115947B (https=) 1963-05-24 1964-05-12

Country Status (3)

Country Link
US (1) US3245067A (https=)
DK (1) DK118061B (https=)
NO (1) NO115947B (https=)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE28915E (en) * 1968-02-29 1976-07-20 BRK Shareholders' Committee Detection of products of combustion
US3594751A (en) * 1968-02-29 1971-07-20 Brk Electronics Detection of products of combustion
US3611335A (en) * 1968-11-13 1971-10-05 Bbk Electronics Inc Multiple combustion sensing device with false alarm prevention
US3798625A (en) * 1970-08-13 1974-03-19 Sci Systems Inc Rate-of-change combustion and combination detection apparatus
US3987423A (en) * 1975-12-22 1976-10-19 The United States Of America As Represented By The United States Energy Research And Development Administration Ionization-chamber smoke detector system
WO1993008550A1 (en) * 1991-10-24 1993-04-29 Capteur Sensors & Analysers Ltd. Fire detector and a method of detecting a fire

Family Cites Families (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3123812A (en) * 1964-03-03 woodling
US2465377A (en) * 1938-11-24 1949-03-29 Banque Pour Entpr S Electr Gas-sensing control means with gas-discharge device
US2278920A (en) * 1939-03-15 1942-04-07 American District Telegraph Co Photoelectric smoke detection system
US2278248A (en) * 1939-12-06 1942-03-31 William A Darrah Process and apparatus for monitoring gases
GB557613A (en) * 1940-05-03 1943-11-29 British Thomson Houston Co Ltd Improved arrangement for the indication of atmospheric moisture
US2408051A (en) * 1942-04-04 1946-09-24 American District Telegraph Co Fire and smoke detector and the like
US2367561A (en) * 1943-04-10 1945-01-16 Michigan State Board Of Agricu Electric hygrometer
US2553420A (en) * 1948-09-29 1951-05-15 Photoswitch Inc Radiation detector
US2646556A (en) * 1950-06-17 1953-07-21 C O Two Fire Equipment Co Supervised alarm system
US2621239A (en) * 1950-08-22 1952-12-09 Photoswitch Inc Heat detector for aircraft
US2759174A (en) * 1952-08-26 1956-08-14 American District Telegraph Co Fire detector
NL94775C (https=) * 1953-02-14
US2826072A (en) * 1953-06-08 1958-03-11 Honeywell Regulator Co Control apparatus
US2702898A (en) * 1953-10-06 1955-02-22 Electro Watt Electrical And In Gas-responsive control apparatus
US2828450A (en) * 1955-05-09 1958-03-25 Honeywell Regulator Co Transistor controller
US2901740A (en) * 1956-11-23 1959-08-25 Specialties Dev Corp Electrical network automatically responsive to a change in condition
US3077774A (en) * 1957-02-18 1963-02-19 Energy Kontrols Inc Humidity indicating device
US3117311A (en) * 1958-06-21 1964-01-07 Frans C Lemaire Fire detectors
US3058079A (en) * 1959-07-23 1962-10-09 Frank E Jones Hygrometer elements
US3078450A (en) * 1961-08-03 1963-02-19 Martin J Mcginn Pressure compensated ionization chamber fire detector system

Also Published As

Publication number Publication date
DK118061B (da) 1970-06-29
US3245067A (en) 1966-04-05

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