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:
Jan. 07, 1986
Filed:
Sep. 11, 1984
Mai T Xuan, Chavannes, CH;
Omega SA, Bienne, CH;
Abstract
The electromagnetic stepping motor of the invention comprises two rotors coupled to a common transmission wheel. The magnetic circuit of the stator is arranged so as to subject the respective rotors to fluxes of opposite senses .phi..sub.1, .phi..sub.2 when the winding is energized. The magnetization sense of the first rotor is opposite to the magnetization sense of the second rotor in a manner such that they turn in the same sense when subjected to said opposite sense fluxes. This arrangement permits either a diminution of the volume or a decrease in energy consumption of the motor and at the same time increases the security of running thereof in the presence of external magnetic fields. Such a motor is particularly adapted to small volume horological applications.