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:
Oct. 08, 1985
Filed:
Jun. 27, 1984
Mai T Xuan, Chavannes, CH;
Omega SA, Bienne, CH;
Abstract
The electromagnetic stepping motor comprises a first winding (g) and at least one second winding (p.sub.1). The stator (1) has four polar expansions (10, 11, 12, 13) surrounding the rotor (2) such expansions being separated by slots or saturable necks (6, 7, 8, 9). The flux generated by energization of the first winding is separated into two parts (.phi..sub.1, .phi..sub.2) of which one (.phi..sub.2) passes through the core of the second winding (p.sub.1) in order to subject the rotor to two magnetic fields which are substantially symmetric relative to two perpendicular axes (x, y). According to the connection of the windings and the signals applied, the motor may step forward or backward, or in either sense at an accelerated speed. Such a motor is particularly suited to drive a timepiece movement.