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. 07, 1976
Filed:
Dec. 27, 1974
Masahito Yoshino, Suwa, JA;
Kabushiki Kaisha Suwa Seikosha, Tokyo, JA;
Abstract
A step motor particularly suited for use in a quartz crystal electronic timepiece and adapted to minimize adjustment and fixing of the step motor is provided. The step motor includes a coil adapted to receive a timekeeping signal of a predetermined frequency. A low permeable reference member having two high permeable stator yokes integrally mounted thereto is provided, said yokes being electrically coupled to said coil to be magnetized thereby in a first and second magnetic orientation in response to the application of the timekeeping signal to the coil. A permanent magnet rotor is surrounded by the stator yokes, the rotor being stepped in response to each change in the magnetic orientation of the stator yokes.