IT1115948B - Perfezionamento nei generatori di segnali acustici per dispositivi di allarme o avvertimento - Google Patents

Perfezionamento nei generatori di segnali acustici per dispositivi di allarme o avvertimento

Info

Publication number
IT1115948B
IT1115948B IT50639/77A IT5063977A IT1115948B IT 1115948 B IT1115948 B IT 1115948B IT 50639/77 A IT50639/77 A IT 50639/77A IT 5063977 A IT5063977 A IT 5063977A IT 1115948 B IT1115948 B IT 1115948B
Authority
IT
Italy
Prior art keywords
alarm
improvement
sound signal
signal generators
warning devices
Prior art date
Application number
IT50639/77A
Other languages
English (en)
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
Application granted granted Critical
Publication of IT1115948B publication Critical patent/IT1115948B/it

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)
IT50639/77A 1976-08-11 1977-08-10 Perfezionamento nei generatori di segnali acustici per dispositivi di allarme o avvertimento IT1115948B (it)

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
IT1115948B true IT1115948B (it) 1986-02-10

Family

ID=26261827

Family Applications (1)

Application Number Title Priority Date Filing Date
IT50639/77A IT1115948B (it) 1976-08-11 1977-08-10 Perfezionamento nei generatori di segnali acustici per dispositivi di allarme o avvertimento

Country Status (11)

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

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 (it) * 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
US3879726A (en) * 1972-03-20 1975-04-22 Mallory & Co Inc P R Audible alarm unit
AU468619B2 (en) * 1972-03-20 1976-01-15 P.R. Mallory & Co. Inc. 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
IE45864L (en) 1978-02-11
CH622900A5 (it) 1981-04-30
IE45864B1 (en) 1982-12-15
AU2782777A (en) 1979-04-05
BR7705286A (pt) 1978-07-04
US4195284A (en) 1980-03-25
AU517376B2 (en) 1981-07-30
NL7708888A (nl) 1978-02-14
CA1087004A (en) 1980-10-07
SE7708880L (sv) 1978-02-12
FR2361709A1 (fr) 1978-03-10
DE2736089A1 (de) 1978-02-16

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