CA1010969A - Fire alarms - Google Patents

Fire alarms

Info

Publication number
CA1010969A
CA1010969A CA178,298A CA178298A CA1010969A CA 1010969 A CA1010969 A CA 1010969A CA 178298 A CA178298 A CA 178298A CA 1010969 A CA1010969 A CA 1010969A
Authority
CA
Canada
Prior art keywords
fire alarms
alarms
fire
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
CA178,298A
Other languages
English (en)
Other versions
CA178298S (en
Inventor
William T. Peberdy
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.)
Chubb Fire Ltd
Original Assignee
Chubb Fire Security 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
Priority claimed from GB3763372A external-priority patent/GB1405615A/en
Application filed by Chubb Fire Security Ltd filed Critical Chubb Fire Security Ltd
Application granted granted Critical
Publication of CA1010969A publication Critical patent/CA1010969A/en
Expired legal-status Critical Current

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
    • G08B17/103—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means using a light emitting and receiving device

Landscapes

  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Fire-Detection Mechanisms (AREA)
CA178,298A 1972-08-11 1973-08-08 Fire alarms Expired CA1010969A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3763372A GB1405615A (en) 1972-08-11 1972-08-11 Fire alarms

Publications (1)

Publication Number Publication Date
CA1010969A true CA1010969A (en) 1977-05-24

Family

ID=10397860

Family Applications (1)

Application Number Title Priority Date Filing Date
CA178,298A Expired CA1010969A (en) 1972-08-11 1973-08-08 Fire alarms

Country Status (4)

Country Link
US (1) US3846772A (fr)
BE (1) BE803464A (fr)
CA (1) CA1010969A (fr)
ZA (1) ZA735343B (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE7604502L (sv) * 1976-04-15 1977-10-16 Ericsson Telefon Ab L M Optisk branddetektor
US4131888A (en) * 1976-08-18 1978-12-26 American District Telegraph Company Dual projected-beam smoke detector
JPS53144387A (en) * 1977-05-23 1978-12-15 Hochiki Co Depreciation type detector
US4280495A (en) * 1978-11-24 1981-07-28 Sarns, Inc. Air emboli detection
GB2044504B (en) * 1979-03-17 1983-04-20 Hochiki Co Count discriminating fire detector
AU533232B2 (en) * 1979-06-27 1983-11-10 Hochiki Kabushiki Kaisha Photoelectric detector
US4316184A (en) * 1979-07-27 1982-02-16 Pittway Corporation Combination combustion-products detector
US4322723A (en) * 1980-09-08 1982-03-30 Combustion Engineering, Inc. Fault detection in a flame scanner
US4471346A (en) * 1981-06-02 1984-09-11 Eberhard Faber, Inc. Smoke detector
US5321494A (en) * 1992-03-23 1994-06-14 Eastman Kodak Company Subtractive measurement method and apparatus for CRT output intensity measurement

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2794974A (en) * 1955-01-24 1957-06-04 Kidde & Co Walter Compensation for turbulence and other efects in intruder detection systems
US3461443A (en) * 1966-11-07 1969-08-12 Alfred W Vasel Smoke detector with means indicating the failure of the light source
US3566385A (en) * 1968-04-22 1971-02-23 Nat Res Dev Fire detecting apparatus sensitive to refraction
US3723746A (en) * 1970-01-07 1973-03-27 Nat Res Dev Fire detecting apparatus sensitive to refraction

Also Published As

Publication number Publication date
ZA735343B (en) 1974-09-25
BE803464A (fr) 1974-02-11
US3846772A (en) 1974-11-05

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