Alarm signaling circuit for timepiece
US4377345A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 24, 1980 |
| Grant date | Mar 22, 1983 |
| Priority date | — |
| Expiry date | Dec 24, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG04G13/023
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An alarm signaling circuit for a timepiece including a volume control circuit having a variable volume controller which can be externally adjusted and a fixed volume setting means which determines a constant volume, a change over switch which selectively changes the controller and the setting means, and a change over control circuit which has a time section for measuring an alarm signalling time and which supplies a change over control signal to the change over switch after a predetermined passage of time from the start of alarm signaling. The alarm signaling circuit performs the alarm signaling action at a certain volume established by the variable volume controller during a first alarm signaling period from a start of alarm signaling till the predetermined passage of time and further performs the alarm signaling action at a fixed alarm volume determined by the fixed volume setting means in a consecutive second alarm signaling period.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.