GB0211984D0 - Improvements in and relating to piezo-electric elements - Google Patents

Improvements in and relating to piezo-electric elements

Info

Publication number
GB0211984D0
GB0211984D0 GB0211984A GB0211984A GB0211984D0 GB 0211984 D0 GB0211984 D0 GB 0211984D0 GB 0211984 A GB0211984 A GB 0211984A GB 0211984 A GB0211984 A GB 0211984A GB 0211984 D0 GB0211984 D0 GB 0211984D0
Authority
GB
United Kingdom
Prior art keywords
piezo
relating
electric elements
electric
elements
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.)
Granted
Application number
GB0211984A
Other versions
GB2388916A (en
GB2388916B (en
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.)
Novar Systems Ltd
Original Assignee
Gent Ltd
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 Gent Ltd filed Critical Gent Ltd
Priority to GB0211984A priority Critical patent/GB2388916B/en
Publication of GB0211984D0 publication Critical patent/GB0211984D0/en
Publication of GB2388916A publication Critical patent/GB2388916A/en
Application granted granted Critical
Publication of GB2388916B publication Critical patent/GB2388916B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B29/00—Checking or monitoring of signalling or alarm systems; Prevention or correction of operating errors, e.g. preventing unauthorised operation
    • G08B29/12—Checking intermittently signalling or alarm systems
    • G08B29/126—Checking intermittently signalling or alarm systems of annunciator circuits

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
GB0211984A 2002-05-23 2002-05-23 Improvements in and relating to piezo-electric elements Expired - Fee Related GB2388916B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB0211984A GB2388916B (en) 2002-05-23 2002-05-23 Improvements in and relating to piezo-electric elements

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0211984A GB2388916B (en) 2002-05-23 2002-05-23 Improvements in and relating to piezo-electric elements

Publications (3)

Publication Number Publication Date
GB0211984D0 true GB0211984D0 (en) 2002-07-03
GB2388916A GB2388916A (en) 2003-11-26
GB2388916B GB2388916B (en) 2004-12-01

Family

ID=9937350

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0211984A Expired - Fee Related GB2388916B (en) 2002-05-23 2002-05-23 Improvements in and relating to piezo-electric elements

Country Status (1)

Country Link
GB (1) GB2388916B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113256951A (en) * 2021-05-13 2021-08-13 公安部第三研究所 System for realizing feedback type vibration recording and simulation test aiming at vibration intrusion detector

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1898377A1 (en) * 2006-09-08 2008-03-12 Hekatron Vertriebs GmbH Detector and method for testing this detector
DE102011087676A1 (en) 2011-12-02 2013-06-06 Continental Automotive Gmbh Method and device for checking a loudspeaker arrangement
US9014400B2 (en) * 2013-08-26 2015-04-21 Honeywell International Inc. Apparatus and method of silent monitoring alarm sounders
DE102016110680A1 (en) * 2016-06-09 2017-12-14 Techem Energy Services Gmbh Circuit arrangement and method for controlling and checking the function of a piezoelectric sounder
US12066499B2 (en) * 2021-09-28 2024-08-20 Carrier Corporation Piezo sounder self-test using feedback pin
CN116520029B (en) * 2023-03-28 2023-11-17 山东大学 Digital self-diagnosis sensing intelligent layer integrating active and passive monitoring and method

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3855415A (en) * 1973-07-20 1974-12-17 Kane Corp Du Communication sound system continuously monitored
US4037222A (en) * 1975-10-02 1977-07-19 Gulf & Western Manufacturing Company (Systems) Supervision of transducers
US4554533A (en) * 1983-09-26 1985-11-19 Whelen Engineering Company, Inc. Method of and apparatus for the testing of warning systems
JPH07129875A (en) * 1993-11-04 1995-05-19 Nippon Signal Co Ltd:The Alarm device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113256951A (en) * 2021-05-13 2021-08-13 公安部第三研究所 System for realizing feedback type vibration recording and simulation test aiming at vibration intrusion detector

Also Published As

Publication number Publication date
GB2388916A (en) 2003-11-26
GB2388916B (en) 2004-12-01

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20210523