JPS57135386A - Watch provided with hydrobarometer - Google Patents
Watch provided with hydrobarometerInfo
- Publication number
- JPS57135386A JPS57135386A JP56019893A JP1989381A JPS57135386A JP S57135386 A JPS57135386 A JP S57135386A JP 56019893 A JP56019893 A JP 56019893A JP 1989381 A JP1989381 A JP 1989381A JP S57135386 A JPS57135386 A JP S57135386A
- Authority
- JP
- Japan
- Prior art keywords
- air chamber
- hydrobarometer
- diaphragm
- depth
- water
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G04—HOROLOGY
- G04D—APPARATUS OR TOOLS SPECIALLY DESIGNED FOR MAKING OR MAINTAINING CLOCKS OR WATCHES
- G04D99/00—Subject matter not provided for in other groups of this subclass
Abstract
PURPOSE:To obtain a watch provided with a hydrobarometer of a simple constitution, by detecting the excitation of a vibration diaphragm opposed through an air chamber to a thin part of a back, by a piezoelectric thin film. CONSTITUTION:An air chamber 3 is formed by a thin part 1a of a back 1, the back 1 and a circular thin vibration diaphragm 2 are installed so as to be opposed to each other through the air chamber 3, and resonance frequency of the diaphragm 2 driven and energized by a frequency dividing output, etc. is varied higher as the depth of water becomes deep and static pressure of the air chamber 3 becomes highs. The energizing amplitude of the resonance frequency corresponding to this depth of water is detected by a piezoelectric thin film 6 provided on the diaphragm 2, and it is possible to obtain a clock provided with a hydrobarometer, which is capable of measuring and displaying the depth of water, too, by a simple constitution consisting of a few parts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56019893A JPS57135386A (en) | 1981-02-13 | 1981-02-13 | Watch provided with hydrobarometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56019893A JPS57135386A (en) | 1981-02-13 | 1981-02-13 | Watch provided with hydrobarometer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS57135386A true JPS57135386A (en) | 1982-08-20 |
Family
ID=12011870
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56019893A Pending JPS57135386A (en) | 1981-02-13 | 1981-02-13 | Watch provided with hydrobarometer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57135386A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0195636A2 (en) * | 1985-03-19 | 1986-09-24 | Citizen Watch Co. Ltd. | Wristwatch with pressure sensor |
| US5224059A (en) * | 1988-06-07 | 1993-06-29 | Citizen Watch Co., Ltd. | Device for measuring altitude and barometric pressure |
| EP0670532A1 (en) * | 1994-03-04 | 1995-09-06 | Asulab S.A. | Watch displaying meteorological forecasting |
-
1981
- 1981-02-13 JP JP56019893A patent/JPS57135386A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0195636A2 (en) * | 1985-03-19 | 1986-09-24 | Citizen Watch Co. Ltd. | Wristwatch with pressure sensor |
| US5224059A (en) * | 1988-06-07 | 1993-06-29 | Citizen Watch Co., Ltd. | Device for measuring altitude and barometric pressure |
| EP0670532A1 (en) * | 1994-03-04 | 1995-09-06 | Asulab S.A. | Watch displaying meteorological forecasting |
| CH685659GA3 (en) * | 1994-03-04 | 1995-09-15 | Asulab Sa | Watch showing a weather forecast. |
| US5500835A (en) * | 1994-03-04 | 1996-03-19 | Asulab S.A. | Weather forecasting watch |
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