CA981754A - Smoke detector failure alarm - Google Patents

Smoke detector failure alarm

Info

Publication number
CA981754A
CA981754A CA165,084A CA165084A CA981754A CA 981754 A CA981754 A CA 981754A CA 165084 A CA165084 A CA 165084A CA 981754 A CA981754 A CA 981754A
Authority
CA
Canada
Prior art keywords
smoke detector
failure alarm
detector failure
alarm
smoke
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
CA165,084A
Other versions
CA165084S (en
Inventor
Robert B. Enemark
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.)
Electro Signal Lab Inc
Original Assignee
Electro Signal Lab 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 Electro Signal Lab Inc filed Critical Electro Signal Lab Inc
Application granted granted Critical
Publication of CA981754A publication Critical patent/CA981754A/en
Expired legal-status Critical Current

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
    • G08B17/103—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
    • G08B17/107—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 for detecting light-scattering due to smoke

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)
  • Emergency Alarm Devices (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
CA165,084A 1972-03-15 1973-03-02 Smoke detector failure alarm Expired CA981754A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US23477572A 1972-03-15 1972-03-15

Publications (1)

Publication Number Publication Date
CA981754A true CA981754A (en) 1976-01-13

Family

ID=22882779

Family Applications (1)

Application Number Title Priority Date Filing Date
CA165,084A Expired CA981754A (en) 1972-03-15 1973-03-02 Smoke detector failure alarm

Country Status (4)

Country Link
US (1) US3774186A (en)
CA (1) CA981754A (en)
DE (1) DE2312977A1 (en)
GB (1) GB1394642A (en)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3936814A (en) * 1974-04-29 1976-02-03 Bernz-O-Matic Corporation Smoke detector and alarm
US3879717A (en) * 1974-06-19 1975-04-22 K F Ind Inc Portable methane monitor and alarm system
US4001800A (en) * 1974-06-24 1977-01-04 Gentex Company Smoke detecting device
US3980997A (en) * 1974-07-17 1976-09-14 General Signal Corporation Smoke detector
US4021792A (en) * 1975-06-23 1977-05-03 Wellen Industries Smoke alarm
US4283657A (en) * 1976-03-25 1981-08-11 Lampiridae Associates Exit illuminating system
US4096473A (en) * 1976-12-09 1978-06-20 P.R. Mallory & Co. Inc. High output smoke and heat detector alarm system utilizing a piezoelectric transducer and a voltage doubling means
US4101880A (en) * 1976-12-27 1978-07-18 Wheelock Signals, Inc. Audiovisual signaling device
US4093943A (en) * 1976-12-27 1978-06-06 Knight Webster B Sequential power distribution circuit
US4302753A (en) * 1978-01-26 1981-11-24 Pittway Corporation Multi-function combustion detecting device
USRE30620E (en) * 1978-07-03 1981-05-19 P. R. Mallory & Co. Inc. High output smoke and heat detector alarm system utilizing a piezoelectric transducer and a voltage doubling means
US4266220A (en) * 1979-07-27 1981-05-05 Malinowski William J Self-calibrating smoke detector and method
US4471346A (en) * 1981-06-02 1984-09-11 Eberhard Faber, Inc. Smoke detector

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1290819B (en) * 1963-09-05 1969-03-13 Kalle Ag Device for wetting development of electrophotographic recording material
US3487404A (en) * 1967-03-23 1969-12-30 Avco Corp Combined fire alarm,burglar alarm,and intercommunication system
US3555532A (en) * 1968-10-29 1971-01-12 Graham Stuart Corp Vapor or particle detection device
US3693110A (en) * 1971-02-23 1972-09-19 C A Briggs Co Audible signal or alarm device including two variable frequency unijunction transistor oscillators

Also Published As

Publication number Publication date
US3774186A (en) 1973-11-20
DE2312977A1 (en) 1973-09-27
GB1394642A (en) 1975-05-21

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