EP0177068A1 - Warning devices - Google Patents

Warning devices Download PDF

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Publication number
EP0177068A1
EP0177068A1 EP85200850A EP85200850A EP0177068A1 EP 0177068 A1 EP0177068 A1 EP 0177068A1 EP 85200850 A EP85200850 A EP 85200850A EP 85200850 A EP85200850 A EP 85200850A EP 0177068 A1 EP0177068 A1 EP 0177068A1
Authority
EP
European Patent Office
Prior art keywords
sound
responsive
frequency
response
warning devices
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Withdrawn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
EP85200850A
Other languages
German (de)
French (fr)
Inventor
Napoleon Kwok Chun-Keung
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.)
MEIJI ELECTRONIC Manufacturing Co Ltd
Original Assignee
MEIJI ELECTRONIC Manufacturing Co 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 MEIJI ELECTRONIC Manufacturing Co Ltd filed Critical MEIJI ELECTRONIC Manufacturing Co Ltd
Publication of EP0177068A1 publication Critical patent/EP0177068A1/en
Withdrawn legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B3/00—Audible signalling systems; Audible personal calling systems
    • G08B3/10—Audible signalling systems; Audible personal calling systems using electric transmission; using electromagnetic transmission

Definitions

  • This invention relates to warning devices, to give an audible signal when suitably actuated.
  • the invention provides a device including means responsive to sound in a given frequency band and a sound emitted actuated in response to the frequency responsive means to emit sound for a predetermined time.
  • a preferred frequency band for the responsive device is 1600 Hz to 2200 Hz.
  • the device is part of a key ring. If the key ring is lost a whistle at a frequency to which the responsive means reacts will set of sound emission to guide the owner to his lost keys.
  • a piezo-electric microphone device 1 responds to sound of frequency about 1,800 Hz (say within an octave bracketing this frequency). Response by the device 1 actuates a control logic circuit 2, and thence, by way of filter 3 and amplifier 4 an audio generator 5.
  • the logic circuit 2 also controls a timer 6, and this controls the audio generator through amplifier 7, filter 8 and memory and programming control circuit 9.
  • a response by the device 1 causes generation of intermittent sound of lower frequency, for a given period, e.g. like a conventional "beeper".
  • a further whistle of the appropriate frequency will cause the generator to repeat the performance.
  • a power supply not shown is included, in the form of batteries producing 3 volts D.C.
  • Elements of the circuit can be part of an integrated circuit or "chip".
  • a lost set of keys may be located in the dark, or in a hidden corner, by this device.
  • the device may be used to locate any item that could go missing, for example animals or children. A child could wear the device as a pendant.
  • the device may generate a sequence of musical notes, but not in the frequency band to which the piezo-electric microphone responds.
  • the device may be combined with a watch, say having a L.C.D. display.

Abstract

A device including means (1) responsive to sound in a given frequency band and a sound emitted actuated in response to the frequency responsive means to emit sound for a predetermined time.

Description

  • This invention relates to warning devices, to give an audible signal when suitably actuated.
  • The invention provides a device including means responsive to sound in a given frequency band and a sound emitted actuated in response to the frequency responsive means to emit sound for a predetermined time.
  • A preferred frequency band for the responsive device is 1600 Hz to 2200 Hz.
  • In one example of the invention, the device is part of a key ring. If the key ring is lost a whistle at a frequency to which the responsive means reacts will set of sound emission to guide the owner to his lost keys.
  • Referring to the drawing, which is a circuit diagram illustrating one example of the invention, a piezo-electric microphone device 1 responds to sound of frequency about 1,800 Hz (say within an octave bracketing this frequency). Response by the device 1 actuates a control logic circuit 2, and thence, by way of filter 3 and amplifier 4 an audio generator 5.
  • The logic circuit 2 also controls a timer 6, and this controls the audio generator through amplifier 7, filter 8 and memory and programming control circuit 9.
  • A response by the device 1 causes generation of intermittent sound of lower frequency, for a given period, e.g. like a conventional "beeper". A further whistle of the appropriate frequency will cause the generator to repeat the performance.
  • A power supply not shown is included, in the form of batteries producing 3 volts D.C. Elements of the circuit can be part of an integrated circuit or "chip".
  • A lost set of keys may be located in the dark, or in a hidden corner, by this device. The device may be used to locate any item that could go missing, for example animals or children. A child could wear the device as a pendant.
  • The device may generate a sequence of musical notes, but not in the frequency band to which the piezo-electric microphone responds.
  • The device may be combined with a watch, say having a L.C.D. display.

Claims (5)

1.- A device including means (1) responsive to sound in a given frequency band and a sound emitted actuated in response to the frequency responsive means to emit sound for a predetermined time.
2.- A device as claimed in claim 1, wherein the device is responsive to a frequency in the region of 1,800 Hz.
3.- A device as claimed in claim 1 or claim 2, wherein the responsive means (1) is a piezo-electric device.
4.- A device as claimed in any of claims 1 to 3, wherein the sound emitter (1) emits a series of "beeps".
5.- A device as claimed in any of claims 1 to 4, wherein the device is part of a key ring or pendant:
EP85200850A 1984-10-02 1985-05-28 Warning devices Withdrawn EP0177068A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8424801 1984-10-02
GB848424801A GB8424801D0 (en) 1984-10-02 1984-10-02 Warning devices

Publications (1)

Publication Number Publication Date
EP0177068A1 true EP0177068A1 (en) 1986-04-09

Family

ID=10567528

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85200850A Withdrawn EP0177068A1 (en) 1984-10-02 1985-05-28 Warning devices

Country Status (3)

Country Link
EP (1) EP0177068A1 (en)
JP (1) JPS6190298A (en)
GB (1) GB8424801D0 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6166652A (en) * 1997-06-23 2000-12-26 Benvenuti; Kerrie System and method for locating misplaced items

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6351731A (en) * 1986-08-21 1988-03-04 Aihon Kk Cordless speaking device

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4101873A (en) * 1976-01-26 1978-07-18 Benjamin Ernest Anderson Device to locate commonly misplaced objects
WO1982001780A1 (en) * 1980-11-14 1982-05-27 Lander David R Means for assisting in locating an object
DE3300355A1 (en) * 1983-01-07 1984-03-22 Friedrich 5830 Schwelm Köhler Search and signal protection system
EP0106827A2 (en) * 1982-09-08 1984-04-25 Lienart van Lidth de Jeude, Roland Anti-forgetting device
WO1984003973A1 (en) * 1983-03-29 1984-10-11 Edward Malcolm Jeffrey Self-annunciator
WO1985000233A1 (en) * 1983-06-29 1985-01-17 Bko, Inc. Electronic sound detecting unit for locating missing articles

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4101873A (en) * 1976-01-26 1978-07-18 Benjamin Ernest Anderson Device to locate commonly misplaced objects
WO1982001780A1 (en) * 1980-11-14 1982-05-27 Lander David R Means for assisting in locating an object
EP0106827A2 (en) * 1982-09-08 1984-04-25 Lienart van Lidth de Jeude, Roland Anti-forgetting device
DE3300355A1 (en) * 1983-01-07 1984-03-22 Friedrich 5830 Schwelm Köhler Search and signal protection system
WO1984003973A1 (en) * 1983-03-29 1984-10-11 Edward Malcolm Jeffrey Self-annunciator
WO1985000233A1 (en) * 1983-06-29 1985-01-17 Bko, Inc. Electronic sound detecting unit for locating missing articles

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6166652A (en) * 1997-06-23 2000-12-26 Benvenuti; Kerrie System and method for locating misplaced items

Also Published As

Publication number Publication date
GB8424801D0 (en) 1984-11-07
JPS6190298A (en) 1986-05-08

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Legal Events

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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Designated state(s): AT BE CH DE FR IT LI LU NL SE

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Effective date: 19861210

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Inventor name: KWOK CHUN-KEUNG, NAPOLEON