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:
Apr. 22, 1980
Filed:
Dec. 11, 1975
Kazunari Kume, Tokorozawa, JP;
Minoru Watanabe, Tokorozawa, JP;
Hideshi Ohno, Sayama, JP;
Munetaka Tamaru, Tokyo, JP;
Takayasu Machida, Iruma, JP;
Seiichi Nakamura, Tokyo, JP;
Shigeru Morokawa, Higashi Yamato, JP;
Citizen Watch Co., Ltd., Tokyo, JP;
Abstract
An electronic timepiece including a battery, a drive motor, a drive, a display, and electronic circuits for driving said motor. The motor is a pulse motor and comprises a core, coil, yoke and rotor. The rotor includes a worm gear having worm teeth which engage with a gear wheel. The teeth on the worm gear are arranged and configured such that the initial and final portions of each tooth which engage with the gear wheel are parallel to the plane of rotation of the rotor thereby preventing torque applied to the gear wheel from being transmitted to the rotor.