CA1032834A - Systeme d'alarme sur fermeture - Google Patents

Systeme d'alarme sur fermeture

Info

Publication number
CA1032834A
CA1032834A CA209,832A CA209832A CA1032834A CA 1032834 A CA1032834 A CA 1032834A CA 209832 A CA209832 A CA 209832A CA 1032834 A CA1032834 A CA 1032834A
Authority
CA
Canada
Prior art keywords
alarm system
operated alarm
closure operated
closure
operated
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
CA209,832A
Other languages
English (en)
Inventor
Clarence L. Hamilton
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.)
James River Corp of Nevada
Original Assignee
Crown Zellerbach Corp
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 Crown Zellerbach Corp filed Critical Crown Zellerbach Corp
Application granted granted Critical
Publication of CA1032834A publication Critical patent/CA1032834A/fr
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/16—Actuation by interference with mechanical vibrations in air or other fluid
    • G08B13/1654—Actuation by interference with mechanical vibrations in air or other fluid using passive vibration detection systems
    • G08B13/1681—Actuation by interference with mechanical vibrations in air or other fluid using passive vibration detection systems using infrasonic detecting means, e.g. a microphone operating below the audible frequency range
CA209,832A 1973-09-24 1974-09-20 Systeme d'alarme sur fermeture Expired CA1032834A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US400187A US3882445A (en) 1973-09-24 1973-09-24 Compression-wave alarm system

Publications (1)

Publication Number Publication Date
CA1032834A true CA1032834A (fr) 1978-06-13

Family

ID=23582564

Family Applications (1)

Application Number Title Priority Date Filing Date
CA209,832A Expired CA1032834A (fr) 1973-09-24 1974-09-20 Systeme d'alarme sur fermeture

Country Status (2)

Country Link
US (1) US3882445A (fr)
CA (1) CA1032834A (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN206284396U (zh) * 2016-11-11 2017-06-30 深圳市艾维普思科技股份有限公司 电池盒及电子烟

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2903683A (en) * 1957-02-25 1959-09-08 Kidde & Co Walter Sensitivity control of apparatus for detecting disturbances in an enclosure
US2883861A (en) * 1957-06-14 1959-04-28 Sperry Prod Inc Liquid level indicator
US3183499A (en) * 1963-07-03 1965-05-11 Richard G Cowen High directivity solid curtain perimeter intrusion system
US3289192A (en) * 1964-04-10 1966-11-29 Peter G Davey Air flow monitoring enclosure intrusion alarm having retarded flowmeter
US3438021A (en) * 1965-07-26 1969-04-08 Westinghouse Electric Corp Perimeter intrusion alarm
US3500952A (en) * 1967-12-20 1970-03-17 Pitney Bowes Inc Acoustical sensing device

Also Published As

Publication number Publication date
US3882445A (en) 1975-05-06

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