IT1016769B - ACOUSTIC ALARM DEVICE INCLUDING AN ELECTRIC PIEZO TRANSDUCER - Google Patents

ACOUSTIC ALARM DEVICE INCLUDING AN ELECTRIC PIEZO TRANSDUCER

Info

Publication number
IT1016769B
IT1016769B IT69462/74A IT6946274A IT1016769B IT 1016769 B IT1016769 B IT 1016769B IT 69462/74 A IT69462/74 A IT 69462/74A IT 6946274 A IT6946274 A IT 6946274A IT 1016769 B IT1016769 B IT 1016769B
Authority
IT
Italy
Prior art keywords
device including
alarm device
acoustic alarm
piezo transducer
electric piezo
Prior art date
Application number
IT69462/74A
Other languages
Italian (it)
Original Assignee
Mallory & Co Inc P R
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 Mallory & Co Inc P R filed Critical Mallory & Co Inc P R
Application granted granted Critical
Publication of IT1016769B publication Critical patent/IT1016769B/en

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
    • 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
    • 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
    • G10K9/18—Details, e.g. bulbs, pumps, pistons, switches or casings
    • G10K9/22—Mountings; Casings
IT69462/74A 1973-08-09 1974-08-02 ACOUSTIC ALARM DEVICE INCLUDING AN ELECTRIC PIEZO TRANSDUCER IT1016769B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US38694073A 1973-08-09 1973-08-09

Publications (1)

Publication Number Publication Date
IT1016769B true IT1016769B (en) 1977-06-20

Family

ID=23527734

Family Applications (1)

Application Number Title Priority Date Filing Date
IT69462/74A IT1016769B (en) 1973-08-09 1974-08-02 ACOUSTIC ALARM DEVICE INCLUDING AN ELECTRIC PIEZO TRANSDUCER

Country Status (6)

Country Link
JP (1) JPS5046295A (en)
BR (1) BR7405910D0 (en)
DE (2) DE7426907U (en)
FR (1) FR2240489B3 (en)
GB (1) GB1435668A (en)
IT (1) IT1016769B (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50133074U (en) * 1974-04-16 1975-11-01
JPS50133075U (en) * 1974-04-16 1975-11-01
JPS50133076U (en) * 1974-04-16 1975-11-01
JPS5526955Y2 (en) * 1976-06-09 1980-06-27
CA1087004A (en) * 1976-08-11 1980-10-07 Michael J. Hampshire Sound generator
DE3230060C2 (en) * 1981-07-31 1986-07-31 Sumitomo Electric Industries, Ltd., Osaka Piezoelectric buzzer
US4935909A (en) * 1986-12-10 1990-06-19 Emhart Industries Inc. Piezoelectric signaling device
DE19626293A1 (en) * 1996-07-01 1998-01-08 Teves Gmbh Alfred Ultrasonic transducer with contact element
DE102008023982A1 (en) * 2008-05-16 2009-12-03 Vemac Gmbh & Co. Kg Circuit for controlling capacitively influenced loads

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL6508091A (en) * 1965-06-24 1966-12-27
GB1219805A (en) * 1967-06-21 1971-01-20 Gen Electric Improvements in vacuum type circuit interrupter

Also Published As

Publication number Publication date
FR2240489A1 (en) 1975-03-07
JPS5046295A (en) 1975-04-24
DE2438057A1 (en) 1975-03-06
GB1435668A (en) 1976-05-12
FR2240489B3 (en) 1977-06-03
BR7405910D0 (en) 1975-05-27
DE7426907U (en) 1977-11-03

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