CH552989A - SMOKE DETECTOR. - Google Patents

SMOKE DETECTOR.

Info

Publication number
CH552989A
CH552989A CH1528272A CH1528272A CH552989A CH 552989 A CH552989 A CH 552989A CH 1528272 A CH1528272 A CH 1528272A CH 1528272 A CH1528272 A CH 1528272A CH 552989 A CH552989 A CH 552989A
Authority
CH
Switzerland
Prior art keywords
smoke detector
smoke
detector
Prior art date
Application number
CH1528272A
Other languages
German (de)
Original Assignee
Honeywell 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 Honeywell Inc filed Critical Honeywell Inc
Publication of CH552989A publication Critical patent/CH552989A/en

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
    • G08B17/113—Constructional details
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J41/00—Discharge tubes for measuring pressure of introduced gas or for detecting presence of gas; Discharge tubes for evacuation by diffusion of ions
    • H01J41/02—Discharge tubes for measuring pressure of introduced gas or for detecting presence of gas
    • H01J41/08—Discharge tubes for measuring pressure of introduced gas or for detecting presence of gas with ionisation by means of radioactive substances, e.g. alphatrons

Landscapes

  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
CH1528272A 1971-10-27 1972-10-19 SMOKE DETECTOR. CH552989A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US19282771A 1971-10-27 1971-10-27

Publications (1)

Publication Number Publication Date
CH552989A true CH552989A (en) 1974-08-30

Family

ID=22711191

Family Applications (1)

Application Number Title Priority Date Filing Date
CH1528272A CH552989A (en) 1971-10-27 1972-10-19 SMOKE DETECTOR.

Country Status (3)

Country Link
US (1) US3735138A (en)
CH (1) CH552989A (en)
DE (1) DE2242212A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5189399A (en) * 1989-02-18 1993-02-23 Hartwig Beyersdorf Method of operating an ionization smoke alarm and ionization smoke alarm

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1504741A (en) * 1975-01-28 1978-03-22 Radiochemical Centre Ltd Iron-55- a source for use in ionisation chambers
US4053776A (en) * 1976-05-25 1977-10-11 The United States Of America As Represented By Thesecretary Of The Interior Sub-micron particle detector
JPS60135757A (en) * 1983-12-23 1985-07-19 Hochiki Corp Gas sensor
US5237281A (en) * 1990-11-13 1993-08-17 Hughes Aircraft Company Ion drag air flow meter
US9437093B2 (en) 2011-10-06 2016-09-06 Microchip Technology Incorporated Differential current measurements to determine ION current in the presence of leakage current
US9823280B2 (en) 2011-12-21 2017-11-21 Microchip Technology Incorporated Current sensing with internal ADC capacitor

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LU48167A1 (en) * 1965-03-11 1966-09-12 Applic Electroniques Ets
CH446131A (en) * 1966-02-22 1967-10-31 Cerberus Ag Ionization fire alarm system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5189399A (en) * 1989-02-18 1993-02-23 Hartwig Beyersdorf Method of operating an ionization smoke alarm and ionization smoke alarm

Also Published As

Publication number Publication date
DE2242212A1 (en) 1973-05-03
US3735138A (en) 1973-05-22

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Legal Events

Date Code Title Description
PL Patent ceased