The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 09, 1980
Filed:
Aug. 07, 1979
Mitsuo Onda, Tanashi, JP;
Singo Ichikawa, Tanashi, JP;
Citizen Watch Company Limited, Tokyo, JP;
Abstract
An electronic timepiece having a voltage conversion circuit for providing a different supply voltage from the timepiece battery voltage, detection means for detecting a condition in which a drive signal of relatively high voltage must be applied to an electromagnetic transducer of the timepiece, which is driven intermittently, switching means controlled by the detection means for selecting either the battery voltage or the converted voltage, and a circuit containing a capacitor which is charged by the output voltage of the switching means while the electromagnetic transducer is not being driven, and is discharged by supplying power to the transducer when the latter is driven, so that drive power is supplied to the transducer from, in effect, a low impedance source.