EP1174835A3 - Systèmes d'avertissement audible - Google Patents

Systèmes d'avertissement audible Download PDF

Info

Publication number
EP1174835A3
EP1174835A3 EP01305973A EP01305973A EP1174835A3 EP 1174835 A3 EP1174835 A3 EP 1174835A3 EP 01305973 A EP01305973 A EP 01305973A EP 01305973 A EP01305973 A EP 01305973A EP 1174835 A3 EP1174835 A3 EP 1174835A3
Authority
EP
European Patent Office
Prior art keywords
frequency
transducer
periods
audible output
audible
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.)
Withdrawn
Application number
EP01305973A
Other languages
German (de)
English (en)
Other versions
EP1174835A2 (fr
Inventor
John Lewinsky
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.)
RAFIKI HOLDINGS LIMITED
Original Assignee
Rafiki Protection 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 Rafiki Protection Ltd filed Critical Rafiki Protection Ltd
Publication of EP1174835A2 publication Critical patent/EP1174835A2/fr
Publication of EP1174835A3 publication Critical patent/EP1174835A3/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING SYSTEMS, e.g. PERSONAL CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B3/00—Audible signalling systems, e.g. audible personal calling systems
    • G08B3/10—Audible signalling systems, e.g. audible personal calling systems using electric transmission; using electromagnetic transmission

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Fire Alarms (AREA)
  • Alarm Systems (AREA)
EP01305973A 2000-07-18 2001-07-11 Systèmes d'avertissement audible Withdrawn EP1174835A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0017477 2000-07-18
GB0017477A GB2368997B (en) 2000-07-18 2000-07-18 Audible warning devices

Publications (2)

Publication Number Publication Date
EP1174835A2 EP1174835A2 (fr) 2002-01-23
EP1174835A3 true EP1174835A3 (fr) 2003-03-05

Family

ID=9895779

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01305973A Withdrawn EP1174835A3 (fr) 2000-07-18 2001-07-11 Systèmes d'avertissement audible

Country Status (2)

Country Link
EP (1) EP1174835A3 (fr)
GB (1) GB2368997B (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2388995B (en) 2002-05-23 2004-06-30 Gent Ltd Improvements in and relating to alarms
US7369061B1 (en) * 2004-10-05 2008-05-06 Steven Sellers Vehicle locator device
US20110260875A1 (en) * 2010-04-21 2011-10-27 Koninklijke Philips Electronics, N.V. Alert device and method

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2101452A (en) * 1981-06-19 1983-01-12 Ricoh Kk Buzzer
US5293149A (en) * 1991-04-12 1994-03-08 Sparton Corporation Vehicle horn with electronic solid state energizing circuit

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4104628A (en) * 1976-10-15 1978-08-01 P.R. Mallory & Co. Inc. High output audible alarm device utilizing a piezoelectric transducer and voltage doubling means
GB1555538A (en) * 1977-07-05 1979-11-14 Madewel Products Ltd Electronic audio alarm
US4275388A (en) * 1980-01-09 1981-06-23 General Electric Company Piezoelectric audible alarm frequency self-calibration system
US4401975A (en) * 1981-11-19 1983-08-30 General Signal Corporation Electrical synthesis of mechanical bell
DE3147364A1 (de) * 1981-11-30 1983-06-01 Siemens AG, 1000 Berlin und 8000 München Schaltungsanordnung fuer einen akustischen signalgeber
US4397210A (en) * 1981-12-11 1983-08-09 Cbs Inc. Rhythm sound generator
US5414406A (en) * 1992-04-21 1995-05-09 Sparton Corporation Self-tuning vehicle horn

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2101452A (en) * 1981-06-19 1983-01-12 Ricoh Kk Buzzer
US5293149A (en) * 1991-04-12 1994-03-08 Sparton Corporation Vehicle horn with electronic solid state energizing circuit

Also Published As

Publication number Publication date
GB2368997A (en) 2002-05-15
GB2368997B (en) 2005-05-11
EP1174835A2 (fr) 2002-01-23
GB0017477D0 (en) 2000-08-30

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