CH1080564A4 - - Google Patents

Info

Publication number
CH1080564A4
CH1080564A4 CH1080564D CH1080564D CH1080564A4 CH 1080564 A4 CH1080564 A4 CH 1080564A4 CH 1080564 D CH1080564 D CH 1080564D CH 1080564 D CH1080564 D CH 1080564D CH 1080564 A4 CH1080564 A4 CH 1080564A4
Authority
CH
Switzerland
Application number
CH1080564D
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 filed Critical
Publication of CH1080564A4 publication Critical patent/CH1080564A4/xx

Links

Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
    • G04C21/00—Producing acoustic time signals by electrical means
    • G04C21/16—Producing acoustic time signals by electrical means producing the signals at adjustable fixed times
    • G04C21/28—Producing acoustic time signals by electrical means producing the signals at adjustable fixed times by closing a contact to put into action electro-acoustic means, e.g. awakening by music
    • G—PHYSICS
    • G04—HOROLOGY
    • G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
    • G04C21/00—Producing acoustic time signals by electrical means
    • G—PHYSICS
    • G04—HOROLOGY
    • G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
    • G04C21/00—Producing acoustic time signals by electrical means
    • G04C21/16—Producing acoustic time signals by electrical means producing the signals at adjustable fixed times
    • G04C21/30—Producing acoustic time signals by electrical means producing the signals at adjustable fixed times with provision for a number of operations at different times, e.g. ringing the bells in a school
    • 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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
    • H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
    • H03B5/30—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator
    • H03B5/32—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator being a piezoelectric resonator
    • H03B5/36—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator being a piezoelectric resonator active element in amplifier being semiconductor device
    • H03B5/362—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator being a piezoelectric resonator active element in amplifier being semiconductor device the amplifier being a single transistor

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Electromagnetism (AREA)
  • Electromechanical Clocks (AREA)
  • Electric Clocks (AREA)
  • Amplifiers (AREA)
CH1080564D 1964-08-18 1964-08-18 CH1080564A4 (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1080564A CH419983A (fr) 1964-08-18 1964-08-18 Générateur électronique de signaux acoustiques pour l'horlogerie

Publications (1)

Publication Number Publication Date
CH1080564A4 true CH1080564A4 (it) 1966-05-14

Family

ID=4367043

Family Applications (2)

Application Number Title Priority Date Filing Date
CH1080564A CH419983A (fr) 1964-08-18 1964-08-18 Générateur électronique de signaux acoustiques pour l'horlogerie
CH1080564D CH1080564A4 (it) 1964-08-18 1964-08-18

Family Applications Before (1)

Application Number Title Priority Date Filing Date
CH1080564A CH419983A (fr) 1964-08-18 1964-08-18 Générateur électronique de signaux acoustiques pour l'horlogerie

Country Status (3)

Country Link
US (1) US3341841A (it)
CH (2) CH419983A (it)
DE (1) DE1491897B2 (it)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3447151A (en) * 1967-03-23 1969-05-27 Bronson M Potter Alerting device having oscillations of negative resistance circuit controlled by mechanical resonance of transducer
US3589123A (en) * 1967-08-21 1971-06-29 Messers Gebruder Junghans Gmbh Signal device for electric alarm clocks
US3569963A (en) * 1969-10-06 1971-03-09 Mallory & Co Inc P R Audible alarm unit
GB1376433A (en) * 1970-11-07 1974-12-04 Absalom R R Electric sound-producing device
GB1324018A (en) * 1970-11-13 1973-07-18 Besson Partner Ltd A P Call tone devices
US3788060A (en) * 1971-12-09 1974-01-29 Y Kawamura Watch with an electronic buzzer
JPS5432348B2 (it) * 1972-02-25 1979-10-13
US3974499A (en) * 1973-12-12 1976-08-10 Star Seimitsu Kabushiki Kaisha Contactless buzzer
DE2941388A1 (de) * 1979-10-12 1981-04-23 Philips Patentverwaltung Gmbh, 2000 Hamburg Schaltungsanordnung fuer eine elektronische uhr mit weckeinrichtung
US4496914A (en) * 1981-11-13 1985-01-29 Texas Instruments Incorporated Piezo harn self-oscillating drive circuit

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1214428A (fr) * 1958-12-07 1960-04-08 Hatot Leon Ets Perfectionnements aux appareils électromagnétiques applicables notamment aux avertisseurs horaires autonomes
US3209529A (en) * 1962-01-17 1965-10-05 Bulova Watch Co Inc Electronically controlled stop-watch
US3277465A (en) * 1963-02-25 1966-10-04 Bronson M Potter Electrically operated audible alarm

Also Published As

Publication number Publication date
DE1491897B2 (de) 1973-12-20
DE1491897A1 (de) 1969-10-30
CH419983A (fr) 1966-05-14
US3341841A (en) 1967-09-12

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