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:
May. 04, 1982
Filed:
Aug. 08, 1980
Hisashi Kawahara, Tanashi, JP;
Citizen Watch Company Limited, Tokyo, JP;
Abstract
In an electronic timepiece powered by a lithium battery, a voltage control system is provided whereby a supply voltage of approximately one half of the battery voltage is supplied to certain portions of the timepiece circuit under normal operating conditions, but whereby cessation of operation by the timebase oscillator circuit of the timepiece due to some abnormal state such as excessively low ambient operating temperature is automatically detected and a changeover is made to supply of the full battery voltage to all of the timepiece circuitry. Upon recovery of operation of the timebase oscillator circuit, changeover to the low voltage supply state is performed.