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. 21, 2004
Filed:
Jan. 25, 2001
Seiko Epson Corporation, Tokyo, JP;
Abstract
An electronically controlled mechanical timepiece, which is an electronic device, is equipped with a generator for converting the mechanical energy transmitted from a mainspring through the intermediary of a wheel train into electrical energy, and a rotation control unit for controlling the rotation cycle of the generator The rotation control unit is equipped with a count-up/down counter that compares a reference signal with a rotation detection signal of the generator thereby to adjust a braking time for the generator and a brake control signal generating circuit that corrects the time set at the count-up/down counter on the basis of the rotation cycle of the generator If the rotation cycle of the generator significantly deviates from a reference signal cycle, then the braking time is adjusted on the basis of the rotation cycle. Therefore, optimum brake control can be conducted, a secure and sufficient brake amount can be provided, and the responsiveness in speed control can be enhanced.