SE7708880L - Ljudgenerator - Google Patents

Ljudgenerator

Info

Publication number
SE7708880L
SE7708880L SE7708880A SE7708880A SE7708880L SE 7708880 L SE7708880 L SE 7708880L SE 7708880 A SE7708880 A SE 7708880A SE 7708880 A SE7708880 A SE 7708880A SE 7708880 L SE7708880 L SE 7708880L
Authority
SE
Sweden
Prior art keywords
circuitry
oscillator
resonant frequency
attached
battery
Prior art date
Application number
SE7708880A
Other languages
English (en)
Swedish (sv)
Inventor
M J Hampshire
N J Poole
J Parkes
Original Assignee
Ward Goldstone 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 GB33341/76A external-priority patent/GB1537555A/en
Application filed by Ward Goldstone Ltd filed Critical Ward Goldstone Ltd
Publication of SE7708880L publication Critical patent/SE7708880L/

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R17/00—Piezoelectric transducers; Electrostrictive transducers
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K9/00—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers
    • G10K9/12—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated
    • G10K9/122—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated using piezoelectric driving means

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Oscillators With Electromechanical Resonators (AREA)
  • Electric Clocks (AREA)
  • Underground Or Underwater Handling Of Building Materials (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)
SE7708880A 1976-08-11 1977-08-04 Ljudgenerator SE7708880L (sv)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB33341/76A GB1537555A (en) 1976-08-11 1976-08-11 Sound generator
GB4346676 1976-10-20

Publications (1)

Publication Number Publication Date
SE7708880L true SE7708880L (sv) 1978-02-12

Family

ID=26261827

Family Applications (1)

Application Number Title Priority Date Filing Date
SE7708880A SE7708880L (sv) 1976-08-11 1977-08-04 Ljudgenerator

Country Status (11)

Country Link
US (1) US4195284A ( )
AU (1) AU517376B2 ( )
BR (1) BR7705286A ( )
CA (1) CA1087004A ( )
CH (1) CH622900A5 ( )
DE (1) DE2736089A1 ( )
FR (1) FR2361709A1 ( )
IE (1) IE45864B1 ( )
IT (1) IT1115948B ( )
NL (1) NL7708888A ( )
SE (1) SE7708880L ( )

Families Citing this family (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1126635B (it) * 1979-12-20 1986-05-21 Fiamm Componenti Accessori Spa Avvisatore acustico per autoveicoli
US4310833A (en) * 1980-01-15 1982-01-12 Kobishi America, Inc. Electrically-energized horn
US4335377A (en) * 1980-07-11 1982-06-15 Joseph E. Belavich Medical alert alarm
JPS57119397A (en) * 1981-01-16 1982-07-24 Canon Kk Sound pressure selector for sound emitting body
FR2553213B1 (fr) * 1983-10-11 1986-06-13 Saphymo Stel Dispositif d'alarme sonore etanche et appareil le comportant
KR900003594B1 (ko) * 1985-01-07 1990-05-26 니홍덴소 가부시기 가이샤 경보음 발생장치
US5049853A (en) * 1987-10-19 1991-09-17 Sparton Corporation Electric horn with solid state driver
US5160913A (en) * 1987-10-19 1992-11-03 Sparton Corporation Electric horn with solid state driver
KR0165544B1 (ko) * 1990-03-05 1999-03-20 야마다 로꾸이찌 전자발음장치
US5181019A (en) * 1991-07-02 1993-01-19 Designtech International, Inc. Weighted transducer and driving circuit with feedback
US5414406A (en) * 1992-04-21 1995-05-09 Sparton Corporation Self-tuning vehicle horn
US5398024A (en) * 1992-08-04 1995-03-14 Knowles; Todd Signal annunciators
DE4311701C2 (de) * 1993-04-08 1999-08-26 Siemens Ag Anordnung zur Erzeugung von akustischen Signalen, insbesondere Tonrufen in Telekommunikationsgeräten
JP3521499B2 (ja) * 1993-11-26 2004-04-19 日本碍子株式会社 圧電／電歪膜型素子
US5596311A (en) * 1995-05-23 1997-01-21 Preco, Inc. Method and apparatus for driving a self-resonant acoustic transducer
US5990784A (en) * 1996-12-17 1999-11-23 Yosemite Investment, Inc. Schmitt trigger loud alarm with feedback
US5872506A (en) * 1997-04-04 1999-02-16 Yosemite Investment, Inc. Piezoelectric transducer having directly mounted electrical components and noise making device utilizing same
JPH10294995A (ja) * 1997-04-21 1998-11-04 Matsushita Electric Ind Co Ltd 防滴型超音波送信器
DE19744229A1 (de) * 1997-10-07 1999-04-29 Bosch Gmbh Robert Ultraschallwandler
US6130618A (en) * 1998-01-15 2000-10-10 Yosemite Investment, Inc. Piezoelectric transducer assembly adapted for enhanced functionality
US6417659B1 (en) 2000-08-15 2002-07-09 Systems Material Handling Co. Electronic circuit for tuning vibratory transducers
US6617967B2 (en) 2001-01-10 2003-09-09 Mallory Sonalert Products, Inc. Piezoelectric siren driver circuit
CN102157145B (zh) * 2010-01-29 2014-05-07 能美防灾株式会社 音响报警装置及具有该音响报警装置的火灾警报设备
US10165358B2 (en) 2014-12-11 2018-12-25 Semiconductor Components Industries, Llc Transducer controller and method therefor

Family Cites Families (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB958227A (en) * 1960-10-20 1964-05-21 Arthur Abbey Improvements in or relating to electro-mechanism transducers
US3277465A (en) * 1963-02-25 1966-10-04 Bronson M Potter Electrically operated audible alarm
CH409715A (fr) * 1964-01-28 1966-03-15 Micheloud Andre Générateur électro-acoustique
FR1604442A ( ) * 1968-12-31 1971-11-08
GB1245714A (en) * 1969-10-30 1971-09-08 Standard Telephones Cables Ltd Improvements in or relating to tone generators
US3815129A (en) * 1970-08-20 1974-06-04 Mallory & Co Inc P R Piezoelectric transducer and noise making device utilizing same
CA930211A (en) * 1970-08-20 1973-07-17 Johnson Matthey And Mallory Limited Piezoelectric transducer and noise making device utilizing same
GB1402290A (en) * 1971-12-29 1975-08-06 Sumitomo Electric Industries Piezo-electric acoustic device
GB1370164A (en) * 1972-01-30 1974-10-16 Mullard Ltd Piezoelectric transducer
AU468619B2 (en) * 1972-03-20 1976-01-15 P.R. Mallory & Co. Inc. Audible alarm unit
US3879726A (en) * 1972-03-20 1975-04-22 Mallory & Co Inc P R Audible alarm unit
US3872470A (en) * 1973-04-18 1975-03-18 Airco Inc Audible signal generating apparatus having selectively controlled audible output
CA1006969A (en) * 1973-07-26 1977-03-15 Lyle E. Shoot Piezoelectric transducer
BR7405910D0 (pt) * 1973-08-09 1975-05-27 Mallory & Co Inc P R Aperfeicoamentos e dispositivo de alarme audivel utilizando um transdutor piezoeletrico
US3890612A (en) * 1973-09-28 1975-06-17 Mallory & Co Inc P R High output audible alarm device utilizing a piezoelectric transducer
US3890513A (en) * 1974-02-14 1975-06-17 Systron Donner Corp Acoustic transducer
US3922672A (en) * 1974-03-04 1975-11-25 Mallory & Co Inc P R Audible alarm device
US3995268A (en) * 1974-10-24 1976-11-30 Stewart-Warner Corporation Vehicle alarm
FR2292412A7 (fr) * 1974-11-21 1976-06-18 Jaz Sa Perfectionnement aux vibreurs electromagnetiques a circuit d'entretien electronique
DE7502725U (de) * 1975-01-30 1976-05-06 Gebrueder Junghans Gmbh, 7230 Schramberg Wasserdichte uhr mit einem piezoelektrischen summer
US4010447A (en) * 1976-01-07 1977-03-01 Zenith Radio Corporation Signal transmitter using an active thick film substrate

Also Published As

Publication number Publication date
AU2782777A (en) 1979-04-05
CA1087004A (en) 1980-10-07
AU517376B2 (en) 1981-07-30
FR2361709A1 (fr) 1978-03-10
NL7708888A (nl) 1978-02-14
US4195284A (en) 1980-03-25
BR7705286A (pt) 1978-07-04
CH622900A5 ( ) 1981-04-30
IT1115948B (it) 1986-02-10
DE2736089A1 (de) 1978-02-16
IE45864L (en) 1978-02-11
IE45864B1 (en) 1982-12-15

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