Patent · US Expired

Method and apparatus for controlling a solar-powered radio-controlled timepiece when a storage element is inadequately charged

US6205091A · kind A · utility

6Cited by

7References

7Claims

0Family size

Assignee

Junghans Uhren GmbH · DE

Inventors

Holger Rudolph · Dunningen, DE
Thomas Lechner · Tauberbischofsheim, DE
Johannes Neudecker · Erlangen, DE

Key dates

Filing date	Oct 16, 1998
Grant date	Mar 20, 2001
Priority date	—
Expiry date	Oct 16, 2018

Classification

Technology area (CPC G)Physics
CPC primaryG04G19/08
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

In a solar-powered, radio-controlled timepiece an incorrect display can occur before the operating voltage definitively falls below the switch-off level if each pulse for the electromechanical transducer is no longer sufficient for advancing the display. A step monitor senses such an insufficient pulse and triggers a reset command in order to switch on the radio signal receiver for automatically correcting the hands position to the absolute time which is decoded from the current time telegram.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.