Analogue alarm electronic timepiece
US4358840A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 25, 1980 |
| Grant date | Nov 9, 1982 |
| Priority date | — |
| Expiry date | Feb 25, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG04C3/14
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An analogue alarm electronic timepiece has electronic circuitry for controlling the drive of the time-indicating hands by a reversible stepping motor to selectively position the hands at desired alarm time and display time settings. Externally operable switches control the operation of the electronic circuitry and enable re-positioning of the hands by the motor to the previously set alarm time so that the user of the timepiece may confirm the alarm time setting. The electronic circuit includes a first settable memory means for storing the time difference between the alarm time and the present time, and a second settable memory means for storing the time difference between the present time and the display time. First means are provided for detecting coincidences between the alarm time and the present time. Second means are provided for detecting coincidence between the present time and the display time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.