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:
Jun. 03, 1980
Filed:
Feb. 09, 1978
Roland Sudler, Frankfurt, DE;
Jean-Francois Schwab, Schwalbach, DE;
Quarz-Zeit AG, Frankfurt am Main, DE;
Abstract
A single phase stepping motor, particularly for clocks, with a rotor having several pole teeth and a stator, the latter being made of two stator parts connected with one another via a bridge part, the latter carrying the excitation winding, of which each stator part on its free end transfers into an equal or smaller number (in comparison to half the rotor pole number) of stator pole teeth, the stator pole teeth being directed towards the face side of the rotor. Both stator parts are arranged in a first plane at least in the region of the stator pole teeth and the rotor rotates in a second plane parallel thereto. The pole teeth of the rotor each comprises a main pole and an auxiliary pole, the latter extending in the direction of rotation and formed on the main pole, and between the stator pole teeth, there is provided a permanent magnetic circuit, by means of which circuit the rest position of the rotor is determined during the unexcited condition of the stator.