FR2042092A5 - - Google Patents

Info

Publication number
FR2042092A5
FR2042092A5 FR7008391A FR7008391A FR2042092A5 FR 2042092 A5 FR2042092 A5 FR 2042092A5 FR 7008391 A FR7008391 A FR 7008391A FR 7008391 A FR7008391 A FR 7008391A FR 2042092 A5 FR2042092 A5 FR 2042092A5
Authority
FR
France
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
FR7008391A
Other languages
French (fr)
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.)
American District Telegraph Co
Original Assignee
American District Telegraph Co
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 American District Telegraph Co filed Critical American District Telegraph Co
Application granted granted Critical
Publication of FR2042092A5 publication Critical patent/FR2042092A5/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
    • G08B13/1672—Actuation by interference with mechanical vibrations in air or other fluid using passive vibration detection systems using sonic detecting means, e.g. a microphone operating in the audio frequency range

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Burglar Alarm Systems (AREA)
  • Building Environments (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
FR7008391A 1969-04-02 1970-03-09 Expired FR2042092A5 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US81268969A 1969-04-02 1969-04-02

Publications (1)

Publication Number Publication Date
FR2042092A5 true FR2042092A5 (en) 1971-02-05

Family

ID=25210349

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7008391A Expired FR2042092A5 (en) 1969-04-02 1970-03-09

Country Status (6)

Country Link
US (1) US3618062A (en)
BE (1) BE746999A (en)
DE (1) DE2011857A1 (en)
FR (1) FR2042092A5 (en)
GB (1) GB1285786A (en)
NL (1) NL145074B (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH594943A5 (en) * 1976-09-09 1978-01-31 Spirig Ernst
US4401909A (en) * 1981-04-03 1983-08-30 Dickey-John Corporation Grain sensor using a piezoelectric element
EP0218341A1 (en) * 1985-08-22 1987-04-15 Philip Young Alarm for a blind
US5371719A (en) * 1992-05-22 1994-12-06 Sentry Products, Inc. High security ultrasonic receiver apparatus
GB2271873B (en) * 1992-09-03 1997-02-26 Josef Petr Prokopius Electronic burglar alarm system
US5461363A (en) * 1993-02-11 1995-10-24 Chang; Ming-Sheng Alarm apparatus containing security and safety monitors
GB2300263B (en) * 1995-04-28 1999-10-27 Josef Petr Prokopius Piezo electric detection system for security devices
DE29722430U1 (en) * 1997-12-18 1998-02-26 Siemens AG, 80333 München Room monitoring device
GB2343283A (en) * 1998-10-28 2000-05-03 Robert William Wilkinson A fuel tank alarm system
US20110255850A1 (en) * 2010-04-19 2011-10-20 Richard Hung Minh Dinh Electronic subassemblies for electronic devices
CN108305610B (en) * 2018-03-23 2024-02-20 苏州登堡电子科技有限公司 Split wall vibration sound transmission device

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US640273A (en) * 1897-09-03 1900-01-02 Bankers Electric Protective Company Acoustic alarm system.
US1762973A (en) * 1926-04-28 1930-06-10 Bell Telephone Labor Inc Alarm system
US3366749A (en) * 1964-04-09 1968-01-30 Allen Alan A Audio transducer
US3423543A (en) * 1965-06-24 1969-01-21 Harry W Kompanek Loudspeaker with piezoelectric wafer driving elements
US3487396A (en) * 1966-03-11 1969-12-30 Franklin M Perelman Intrusion vibration detector with ambient noise compensator

Also Published As

Publication number Publication date
US3618062A (en) 1971-11-02
NL145074B (en) 1975-02-17
GB1285786A (en) 1972-08-16
DE2011857A1 (en) 1970-10-08
BE746999A (en) 1970-09-07
NL7004561A (en) 1970-10-06

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Legal Events

Date Code Title Description
ST Notification of lapse