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GB2388995B - Improvements in and relating to alarms - Google Patents

Improvements in and relating to alarms

Info

Publication number
GB2388995B
GB2388995B GB0211987A GB0211987A GB2388995B GB 2388995 B GB2388995 B GB 2388995B GB 0211987 A GB0211987 A GB 0211987A GB 0211987 A GB0211987 A GB 0211987A GB 2388995 B GB2388995 B GB 2388995B
Authority
GB
United Kingdom
Prior art keywords
alarms
relating
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 - Fee Related
Application number
GB0211987A
Other versions
GB2388995A (en
GB0211987D0 (en
Inventor
Michael Barson
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 GB0211987A priority Critical patent/GB2388995B/en
Publication of GB0211987D0 publication Critical patent/GB0211987D0/en
Priority to AU2003241013A priority patent/AU2003241013A1/en
Priority to EP03730331.0A priority patent/EP1507603B1/en
Priority to PCT/GB2003/002268 priority patent/WO2003099468A1/en
Priority to ES03730331.0T priority patent/ES2527050T3/en
Publication of GB2388995A publication Critical patent/GB2388995A/en
Application granted granted Critical
Publication of GB2388995B publication Critical patent/GB2388995B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
    • B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
    • B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
    • B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
    • B06B1/0207—Driving circuits
    • B06B1/0223—Driving circuits for generating signals continuous in time
    • B06B1/0269—Driving circuits for generating signals continuous in time for generating multiple frequencies
    • B06B1/0276—Driving circuits for generating signals continuous in time for generating multiple frequencies with simultaneous generation, e.g. with modulation, harmonics

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Piezo-Electric Transducers For Audible Bands (AREA)
GB0211987A 2002-05-23 2002-05-23 Improvements in and relating to alarms Expired - Fee Related GB2388995B (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
GB0211987A GB2388995B (en) 2002-05-23 2002-05-23 Improvements in and relating to alarms
AU2003241013A AU2003241013A1 (en) 2002-05-23 2003-05-23 Acoustic alarm having a piezo-electric element driven at multiple frequencies
EP03730331.0A EP1507603B1 (en) 2002-05-23 2003-05-23 Acoustic alarm having a piezo-electric element driven at multiple frequencies
PCT/GB2003/002268 WO2003099468A1 (en) 2002-05-23 2003-05-23 Acoustic alarm having a piezo-electric element driven at multiple frequencies
ES03730331.0T ES2527050T3 (en) 2002-05-23 2003-05-23 Acoustic alarm with a piezoelectric element activated with multiple frequencies

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0211987A GB2388995B (en) 2002-05-23 2002-05-23 Improvements in and relating to alarms

Publications (3)

Publication Number Publication Date
GB0211987D0 GB0211987D0 (en) 2002-07-03
GB2388995A GB2388995A (en) 2003-11-26
GB2388995B true GB2388995B (en) 2004-06-30

Family

ID=9937352

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0211987A Expired - Fee Related GB2388995B (en) 2002-05-23 2002-05-23 Improvements in and relating to alarms

Country Status (5)

Country Link
EP (1) EP1507603B1 (en)
AU (1) AU2003241013A1 (en)
ES (1) ES2527050T3 (en)
GB (1) GB2388995B (en)
WO (1) WO2003099468A1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080239876A1 (en) * 2006-09-18 2008-10-02 American Technology Corporation High intensity vehicle proximity acoustics
US9900705B2 (en) 2014-01-23 2018-02-20 Federal Signal Corporation Tone generation
JP6775201B2 (en) * 2017-05-22 2020-10-28 パナソニックＩｐマネジメント株式会社 Alarm sound sound equipment and sound system
US10522008B1 (en) 2018-09-24 2019-12-31 Challenge/Surge Inc. Alarm with piezoelectric element driven repetitively over pseudorandom frequencies
CN109003597B (en) * 2018-09-25 2023-11-03 华润微集成电路(无锡)有限公司 Buzzer driving circuit and corresponding buzzer driving method

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3890612A (en) * 1973-09-28 1975-06-17 Mallory & Co Inc P R High output audible alarm device utilizing a piezoelectric transducer
US4488145A (en) * 1981-01-16 1984-12-11 Canon Kabushiki Kaisha Resonant sounder device for producing multiple warning sounds

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3975650A (en) * 1975-01-30 1976-08-17 Payne Stephen C Ultrasonic generator drive circuit
DE3138068A1 (en) * 1980-11-10 1982-07-08 Marukokeihouki Co. Ltd., Nagano PIEZOELECTRIC MULTI-FREQUENCY SOUND GENERATING DEVICE
JPS57210395A (en) 1981-06-19 1982-12-23 Ricoh Kk Piezo-electric buzzer driving system
JPS6113800A (en) * 1984-06-28 1986-01-22 Murata Mfg Co Ltd Piezoelectric buzzer
KR900003594B1 (en) * 1985-01-07 1990-05-26 니홍덴소 가부시기 가이샤 An alarm
JPH0832111B2 (en) * 1986-10-28 1996-03-27 松下電器産業株式会社 Pronunciation body
FR2619947B1 (en) * 1987-09-02 1989-11-17 Roger Jean Michel FOG HORN FOR AUTOMATIC PHONE SIGNALS
JP3310279B2 (en) * 1990-03-27 2002-08-05 ヤマハ発動機株式会社 Horn
GB2368997B (en) 2000-07-18 2005-05-11 Rafiki Prot Ltd Audible warning devices

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3890612A (en) * 1973-09-28 1975-06-17 Mallory & Co Inc P R High output audible alarm device utilizing a piezoelectric transducer
US4488145A (en) * 1981-01-16 1984-12-11 Canon Kabushiki Kaisha Resonant sounder device for producing multiple warning sounds

Also Published As

Publication number Publication date
WO2003099468A1 (en) 2003-12-04
AU2003241013A1 (en) 2003-12-12
ES2527050T3 (en) 2015-01-20
EP1507603A1 (en) 2005-02-23
GB2388995A (en) 2003-11-26
GB0211987D0 (en) 2002-07-03
EP1507603B1 (en) 2014-12-03

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Legal Events

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

Effective date: 20210523