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
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
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING SYSTEMS, e.g. PERSONAL CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B3/00—Audible signalling systems, e.g. audible personal calling systems
- G08B3/10—Audible signalling systems, e.g. audible personal calling systems using electric transmission; using electromagnetic transmission
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- 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)
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 (https=) | 1966-05-14 |
Family
ID=4367043
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH1080564D CH1080564A4 (https=) | 1964-08-18 | 1964-08-18 | |
| CH1080564A CH419983A (fr) | 1964-08-18 | 1964-08-18 | Générateur électronique de signaux acoustiques pour l'horlogerie |
Family Applications After (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 (https=) |
| CH (2) | CH1080564A4 (https=) |
| DE (1) | DE1491897B2 (https=) |
Families Citing this family (10)
| 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 (https=) * | 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)
| 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 |
-
1964
- 1964-08-18 CH CH1080564D patent/CH1080564A4/xx unknown
- 1964-08-18 CH CH1080564A patent/CH419983A/fr unknown
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1965
- 1965-07-21 DE DE1491897A patent/DE1491897B2/de active Pending
- 1965-07-26 US US474747A patent/US3341841A/en not_active Expired - Lifetime
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 |