BE746999A - STRONG ROOMS PROTECTION SYSTEM - Google Patents

STRONG ROOMS PROTECTION SYSTEM

Info

Publication number
BE746999A
BE746999A BE746999DA BE746999A BE 746999 A BE746999 A BE 746999A BE 746999D A BE746999D A BE 746999DA BE 746999 A BE746999 A BE 746999A
Authority
BE
Belgium
Prior art keywords
protection system
strong rooms
rooms
strong
protection
Prior art date
Application number
Other languages
French (fr)
Inventor
C D Ott
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
Publication of BE746999A publication Critical patent/BE746999A/en

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)
BE746999D 1969-04-02 1970-03-06 STRONG ROOMS PROTECTION SYSTEM BE746999A (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
BE746999A true BE746999A (en) 1970-09-07

Family

ID=25210349

Family Applications (1)

Application Number Title Priority Date Filing Date
BE746999D BE746999A (en) 1969-04-02 1970-03-06 STRONG ROOMS PROTECTION SYSTEM

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
FR2042092A5 (en) 1971-02-05
DE2011857A1 (en) 1970-10-08
NL7004561A (en) 1970-10-06

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Legal Events

Date Code Title Description
RE Patent lapsed

Owner name: AMERICAN DISTRICT TELEGRAPH CY

Effective date: 19860331