Automatic regulation of an electronic watch
US4020628A · kind A · utility
6Cited by
5References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 29, 1975 |
| Grant date | May 3, 1977 |
| Priority date | — |
| Expiry date | Sep 29, 1995 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG04R40/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An autonomous electric watch comprises a receiver for picking up a magnetic or acoustic coded regulation signal delivered by a telephone set, and a control circuit automatically controlling memory circuits of the watch to regulate the frequency and/or set the time displayed in response to reception of such a signal. The regulation signal is provided by a signal generator connected to an automatic telephone reply apparatus that can be called from any subscriber telephone set, and may be combined with a pre-recorded spoken message giving instructions to the caller.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.