CH629067GA3 - - Google Patents
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- Publication number
- CH629067GA3 CH629067GA3 CH862877A CH862877A CH629067GA3 CH 629067G A3 CH629067G A3 CH 629067GA3 CH 862877 A CH862877 A CH 862877A CH 862877 A CH862877 A CH 862877A CH 629067G A3 CH629067G A3 CH 629067GA3
- Authority
- CH
- Switzerland
- Prior art keywords
- vibrating
- air spring
- resonant frequencies
- plate
- plates
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G04—HOROLOGY
- G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
- G04C21/00—Producing acoustic time signals by electrical means
- G04C21/02—Constructional details
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R7/00—Diaphragms for electromechanical transducers; Cones
- H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
- H04R7/04—Plane diaphragms
- H04R7/06—Plane diaphragms comprising a plurality of sections or layers
- H04R7/08—Plane diaphragms comprising a plurality of sections or layers comprising superposed layers separated by air or other fluid
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Multimedia (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- General Physics & Mathematics (AREA)
- Electromechanical Clocks (AREA)
- Glass Compositions (AREA)
- Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
- Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
Abstract
A miniature electronic buzzer for an electronic watch has two vibrating plates with a sealed space between them forming an air spring. One of the vibrating plates carries an amarature which is acted upon by an electromagnetic to vibrate said plate. Vibration is imparted to the other vibrating plate by the air spring. The two vibrating plates and coupling air spring constitute a vibrating system having two resonant frequencies in the audible range. The electromagnet is energized by current having a frequency in the neighborhood of these resonant frequencies. There may be a third vibrating plate coupled with the second vibrating plate by a second air spring. In this event the vibrating system has three resonant frequencies in the audible range.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8331776A JPS538594A (en) | 1976-07-13 | 1976-07-13 | Electronic buzzer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CH629067B CH629067B (en) | |
| CH629067GA3 true CH629067GA3 (en) | 1982-04-15 |
Family
ID=13799036
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH862877A CH629067B (en) | 1976-07-13 | 1977-07-12 | ACOUSTIC ALARM WITH ELECTRONIC EXCITATION. |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US4159472A (en) |
| JP (1) | JPS538594A (en) |
| CH (1) | CH629067B (en) |
| GB (1) | GB1568112A (en) |
| HK (1) | HK50882A (en) |
| SG (1) | SG44082G (en) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5493391A (en) * | 1977-12-30 | 1979-07-24 | Seiko Instr & Electronics Ltd | Small sized audio unit |
| US4251807A (en) * | 1979-03-08 | 1981-02-17 | Pickering & Company | Miniature buzzer |
| JPS5665012A (en) * | 1979-11-02 | 1981-06-02 | Kanegafuchi Chem Ind Co Ltd | Production of soft resin |
| DE3138068A1 (en) * | 1980-11-10 | 1982-07-08 | Marukokeihouki Co. Ltd., Nagano | PIEZOELECTRIC MULTI-FREQUENCY SOUND GENERATING DEVICE |
| JPS59175850U (en) * | 1983-05-06 | 1984-11-24 | 三菱重工業株式会社 | Slag discharge device for coal-fired MHD combustor |
| JPS60134700A (en) * | 1983-12-23 | 1985-07-17 | Nippon Denso Co Ltd | Sound producing device |
| KR900003594B1 (en) * | 1985-01-07 | 1990-05-26 | 니홍덴소 가부시기 가이샤 | An alarm |
| US5990797A (en) * | 1997-03-04 | 1999-11-23 | Bkk Brands, Inc. | Ultraloud smoke detector |
| FR2777095A1 (en) * | 1998-04-02 | 1999-10-08 | Christophe Claret Sa | Watch with much louder audible alarms and time periods |
| DE102008011302A1 (en) * | 2008-02-27 | 2009-09-10 | Siemens Aktiengesellschaft | Panel loudspeaker |
| CH704183A2 (en) * | 2010-12-02 | 2012-06-15 | Montres Breguet Sa | Acoustic radiation membrane for e.g. music watch, has cavities or projecting portions formed in form of honeycomb, where shape and dimensions of cavities are adapted based on type of material as well as notes to be radiated by membrane |
| CH704184A2 (en) * | 2010-12-02 | 2012-06-15 | Montres Breguet Sa | Acoustic radiation membrane for e.g. music watch, has asymmetrical regions i.e. ellipses, to maximize oscillation frequency of membrane in specific frequency band, where regions are excavated in membrane with different uniform thicknesses |
| EP3009894B1 (en) * | 2014-10-15 | 2017-11-29 | Montres Breguet SA | Arrangement with sound-projecting membranes for a chiming watch |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1773605A (en) * | 1927-05-18 | 1930-08-19 | Sefton Wilfred | Loud-speaker |
| GB440041A (en) * | 1934-06-19 | 1935-12-19 | Robert Rodger Glen | Improvements in or relating to loud-speakers and the like |
| US2903673A (en) * | 1954-01-06 | 1959-09-08 | Harris Transducer Corp | Acoustical impedance-matching transducer |
| US3074504A (en) * | 1961-05-25 | 1963-01-22 | Liberty Mfg Corp | Loud-speaker |
-
1976
- 1976-07-13 JP JP8331776A patent/JPS538594A/en active Granted
-
1977
- 1977-07-12 CH CH862877A patent/CH629067B/en unknown
- 1977-07-12 GB GB29208/77A patent/GB1568112A/en not_active Expired
- 1977-07-13 US US05/815,441 patent/US4159472A/en not_active Expired - Lifetime
-
1982
- 1982-09-11 SG SG440/82A patent/SG44082G/en unknown
- 1982-11-25 HK HK508/82A patent/HK50882A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| GB1568112A (en) | 1980-05-29 |
| US4159472A (en) | 1979-06-26 |
| JPS5736598B2 (en) | 1982-08-04 |
| JPS538594A (en) | 1978-01-26 |
| CH629067B (en) | |
| HK50882A (en) | 1982-12-03 |
| SG44082G (en) | 1983-02-25 |
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