Patent · US Expired

Solar cell powered clock having a decorative pendulum

US4791621A · kind A · utility

5Cited by

6References

10Claims

0Family size

Assignee

Junghans Uhren GmbH · DE

Inventors

Gerhard Wild · Frankfurt am Main, DE
Edgar Haller · Simonswald, DE

Key dates

Filing date	Feb 27, 1987
Grant date	Dec 13, 1988
Priority date	—
Expiry date	Feb 27, 2007

Classification

Technology area (CPC G)Physics
CPC primaryG04C10/02
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A solar powered electric clock of the type configured as a traditional 400-day clock with a torsional pendulum includes a housing in which the clockworks, dial face and hands are disposed. The housing is supported over a base by means of vertical columns. Solar cells are mounted in a top surface of the base, along with a storage capacitor. No battery is required. A radio signal receiver mechanism for setting the time in response to external radio signals can be provided and mounted in the housing or base. A pendulum drive mechanism can be mounted in the housing or base. The clockworks is driven by a motor which can be mounted in the housing or base.

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