GB1412457A - Sound generator comprising a piezoelectric acoustic device - Google Patents

Sound generator comprising a piezoelectric acoustic device

Info

Publication number
GB1412457A
GB1412457A GB5971372A GB5971372A GB1412457A GB 1412457 A GB1412457 A GB 1412457A GB 5971372 A GB5971372 A GB 5971372A GB 5971372 A GB5971372 A GB 5971372A GB 1412457 A GB1412457 A GB 1412457A
Authority
GB
United Kingdom
Prior art keywords
tone
different
khz
april
dec
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
Application number
GB5971372A
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.)
Sumitomo Electric Industries Ltd
Original Assignee
Sumitomo Electric Industries 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
Priority claimed from JP4672872U external-priority patent/JPS537646Y2/ja
Priority claimed from JP4851672U external-priority patent/JPS497872U/ja
Priority claimed from JP6236972U external-priority patent/JPS4920468U/ja
Application filed by Sumitomo Electric Industries Ltd filed Critical Sumitomo Electric Industries Ltd
Publication of GB1412457A publication Critical patent/GB1412457A/en
Expired legal-status Critical Current

Links

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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q5/00—Arrangement or adaptation of acoustic signal devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R22/00—Safety belts or body harnesses in vehicles
    • B60R22/48—Control systems, alarms, or interlock systems, for the correct application of the belt or harness
    • 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
    • B06B2201/00—Indexing scheme associated with B06B1/0207 for details covered by B06B1/0207 but not provided for in any of its subgroups
    • B06B2201/50—Application to a particular transducer type
    • B06B2201/55—Piezoelectric transducer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R22/00—Safety belts or body harnesses in vehicles
    • B60R22/48—Control systems, alarms, or interlock systems, for the correct application of the belt or harness
    • B60R2022/4808—Sensing means arrangements therefor
    • B60R2022/4816—Sensing means arrangements therefor for sensing locking of buckle

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Acoustics & Sound (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Piezo-Electric Transducers For Audible Bands (AREA)
  • Emergency Alarm Devices (AREA)

Abstract

1412457 Audible signalling SUMITOMO ELECTRIC INDUSTRIES Ltd 27 Dec 1972 [27 Dec 1971 20 April 1972 24 April 1972 27 May 1972] 59713/72 Heading G4F -[Also in Division H4] A circuit for generating an audible tone comprises a transducer formed from a piezoelectric element and a diaphragm adhered thereto which forms part of an oscillator circuit, a switching device being associated with the oscillator to enable the transducer to be energized either continuously or intermittently. In one embodiment (Fig. 4) an oscillator circuit including a transistor 8 and a piezo-electric device 6, of the type shown in Fig. 1 and including a piezoelectric element 2 having silver electrodes 3, 3<SP>1</SP> with a metal diaphragm 1 adhered thereto, is associated with a multivibrator and five switches D, K, Ig, B and S, to form a warning system for use in an automobile, e.g. to indicate: leaving a key in a key hole with a door open; leaving a safety belt unworn with the engine running; driving at excess speed. The different warning signals comprise a continuous tone and two intermittent tones having different on-off periods. Several similar embodiments are described (Figs. 2, 6, and 7, not shown). In all embodiments the piezoelectric device oscillates at its natural frequency which can be in the range 0À4-15 kHz. A specific frequency may be 2À7 kHz and interruption ratio of 2 to 5 Hz, 10 or 15 Hz are suggested. One tone may be interrupted simultaneously at two different rates
GB5971372A 1971-12-27 1972-12-27 Sound generator comprising a piezoelectric acoustic device Expired GB1412457A (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP204172 1971-12-27
JP4672872U JPS537646Y2 (en) 1972-04-20 1972-04-20
JP4851672U JPS497872U (en) 1972-04-24 1972-04-24
JP6236972U JPS4920468U (en) 1972-05-27 1972-05-27

Publications (1)

Publication Number Publication Date
GB1412457A true GB1412457A (en) 1975-11-05

Family

ID=27453537

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5971372A Expired GB1412457A (en) 1971-12-27 1972-12-27 Sound generator comprising a piezoelectric acoustic device

Country Status (2)

Country Link
US (1) US3912952A (en)
GB (1) GB1412457A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2160004A (en) * 1984-03-15 1985-12-11 Patrick Joseph Lally Improvements relating to audible warning devices
ES2322684A1 (en) * 2005-06-17 2009-06-24 Fundacion Humanismo Y Ciencia Transcranial stimulator for low intensity, has series of brain stimulation coils to circulate current that generates stimulator magnetic field, and signal flow is generated by digital microcontroller

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4172253A (en) * 1972-04-19 1979-10-23 Hermans Albert L Controlled wave pattern ultrasonic burglar alarm
GB1499575A (en) * 1974-09-11 1978-02-01 Seiko Instr & Electronics Electronic buzzers
US4180808A (en) * 1977-12-12 1979-12-25 The Gillette Company Alarm circuit
JPS58119217A (en) * 1982-01-07 1983-07-15 Murata Mfg Co Ltd Piezoelectric tuning fork
JPS60134700A (en) * 1983-12-23 1985-07-17 Nippon Denso Co Ltd Sound producing device
US5373281A (en) * 1991-08-15 1994-12-13 Nartron Corporation Failsafe module
US5633625A (en) * 1995-03-20 1997-05-27 Saturn Electronics & Engineering, Inc. Electronic chime module and method
US6160245A (en) * 1999-05-19 2000-12-12 Maytag Corporation Variable volume signaling device for an appliance
US7061375B2 (en) * 2003-03-12 2006-06-13 Honda Motor Co., Ltd. System for warning a failure to wear a seat belt
EP1665875A1 (en) * 2003-09-16 2006-06-07 Koninklijke Philips Electronics N.V. High efficiency audio reproduction
US20060139152A1 (en) * 2004-12-09 2006-06-29 Honeywell International, Inc. Multi-frequency fire alarm sounder

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3277465A (en) * 1963-02-25 1966-10-04 Bronson M Potter Electrically operated audible alarm
US3320608A (en) * 1964-06-08 1967-05-16 Albert S Pande After beat metronome
US3346857A (en) * 1965-07-19 1967-10-10 Mangood Corp Plural tone audible indicating apparatus having variable time ratio of tones
US3466649A (en) * 1966-03-01 1969-09-09 Gen Alarm Corp Multiple alarm system
US3487404A (en) * 1967-03-23 1969-12-30 Avco Corp Combined fire alarm,burglar alarm,and intercommunication system
US3493966A (en) * 1967-03-29 1970-02-03 Edwards Co Electronic audible alarm devices having plural oscillators
DE1260855B (en) * 1967-06-06 1968-02-08 Saba Gmbh Electronic device for simulating animal sounds
US3681916A (en) * 1969-05-31 1972-08-08 Matsushita Electric Works Ltd Electronic sound alarm clock
US3569963A (en) * 1969-10-06 1971-03-09 Mallory & Co Inc P R Audible alarm unit
JPS5032038B1 (en) * 1970-06-10 1975-10-16
US3693110A (en) * 1971-02-23 1972-09-19 C A Briggs Co Audible signal or alarm device including two variable frequency unijunction transistor oscillators

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2160004A (en) * 1984-03-15 1985-12-11 Patrick Joseph Lally Improvements relating to audible warning devices
ES2322684A1 (en) * 2005-06-17 2009-06-24 Fundacion Humanismo Y Ciencia Transcranial stimulator for low intensity, has series of brain stimulation coils to circulate current that generates stimulator magnetic field, and signal flow is generated by digital microcontroller

Also Published As

Publication number Publication date
US3912952A (en) 1975-10-14

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee