CH632385GA3 - - Google Patents
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- Publication number
- CH632385GA3 CH632385GA3 CH987179A CH987179A CH632385GA3 CH 632385G A3 CH632385G A3 CH 632385GA3 CH 987179 A CH987179 A CH 987179A CH 987179 A CH987179 A CH 987179A CH 632385G A3 CH632385G A3 CH 632385GA3
- Authority
- CH
- Switzerland
- Prior art keywords
- glass
- coil
- hand
- band
- frequency
- 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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Electromechanical Clocks (AREA)
- Electric Clocks (AREA)
- Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
Abstract
The electro-acoustic transducer comprises a sound-emitter element which consists of the glass (2) and of its support ring (17). The latter is an elastic membrane of annular form connected by adhesive bonding or welding, on the one hand to the periphery of the glass and on the other hand to the edge of the opening of the middle part-bezel (1). The joining element (16) is a rod fixed to the rear of the glass perpendicular to the latter. It carries the armature (27) located opposite the excitation electromagnet (21, 24, 26). The coil (26) is fed with current pulses from a battery housed in the movement (5). The frequency of the pulses sent to the coil (26) will be within a specific band, the actual frequency of the sound generator being located outside this band. <IMAGE>
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH987179A CH632385B (en) | 1979-11-02 | 1979-11-02 | WATCH WITH ELECTRO-ACOUSTIC WARNING DEVICE. |
EP80200980A EP0028429A1 (en) | 1979-11-02 | 1980-10-16 | Watch with an electro-acoustic warning device |
JP15295480A JPS5674682A (en) | 1979-11-02 | 1980-10-30 | Clock having electronic alarm |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH987179A CH632385B (en) | 1979-11-02 | 1979-11-02 | WATCH WITH ELECTRO-ACOUSTIC WARNING DEVICE. |
Publications (2)
Publication Number | Publication Date |
---|---|
CH632385B CH632385B (en) | |
CH632385GA3 true CH632385GA3 (en) | 1982-10-15 |
Family
ID=4356575
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH987179A CH632385B (en) | 1979-11-02 | 1979-11-02 | WATCH WITH ELECTRO-ACOUSTIC WARNING DEVICE. |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0028429A1 (en) |
JP (1) | JPS5674682A (en) |
CH (1) | CH632385B (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4107862A1 (en) * | 1991-03-12 | 1992-09-17 | Int Watch Co Iwc | CLOCK |
EP2328044A1 (en) * | 2009-11-25 | 2011-06-01 | Rolex Sa | Watch case |
EP2409200B1 (en) * | 2009-03-19 | 2014-04-23 | Rolex S.A. | Watch case |
EP3644132B1 (en) | 2018-10-26 | 2022-06-08 | Blancpain SA | Striking or musical watch with at least one acoustic radiation membrane, and method of manufacturing said membrane |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1517125A (en) * | 1967-02-16 | 1968-03-15 | Advanced training in wristwatches | |
JPS5431709B2 (en) * | 1972-02-19 | 1979-10-09 | ||
DE2334236C2 (en) * | 1973-07-05 | 1975-07-10 | Timex Corp., Waterbury, Conn. (V.St.A.) | Acoustic signal transmitter for clocks, in particular wristwatches |
CH626497B (en) * | 1977-11-07 | Ebauches Sa | WATCH EQUIPPED WITH A RESONATOR SHAPED BY ITS ICE SUBJECT TO THE ACTION OF A TRANSDUCER. |
-
1979
- 1979-11-02 CH CH987179A patent/CH632385B/en unknown
-
1980
- 1980-10-16 EP EP80200980A patent/EP0028429A1/en not_active Withdrawn
- 1980-10-30 JP JP15295480A patent/JPS5674682A/en active Pending
Also Published As
Publication number | Publication date |
---|---|
EP0028429A1 (en) | 1981-05-13 |
CH632385B (en) | |
JPS5674682A (en) | 1981-06-20 |
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