Touch switch controlled time information correction with safety lock in an electronic wristwatch
US4090353A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 9, 1976 |
| Grant date | May 23, 1978 |
| Priority date | — |
| Expiry date | Jan 9, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG04G5/04
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Transparent touch electrodes are formed on a front glass window of an electronic wristwatch at positions near, for example, the hour information digital display section and the minute information digital display section for correcting the time information in terms of hours and minutes, respectively. A safety lock system associated with the touch electrodes is provided to prevent the time information correction when it is not desired. The safety lock system counts an intermittent touch operation effected on the touch electrodes, thereby allowing the introduction of a time information correction command only when the touch operation is repeated over a predetermined number of times within a predetermined time period.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.