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. 16, 2025
Filed:
Nov. 20, 2023
Eta SA Manufacture Horlogere Suisse, Grenchen, CH;
Joerg Berthoud, Villeret, CH;
ETA SA Manufacture Horlogere Suisse, Grenchen, CH;
Abstract
A control circuit of a timepiece motor (), including a bipolar permanent magnet (), a stator () defining two isthmi (&) and two rest positions for the rotor, and a coil () mounted on the stator. The control circuit can determine the position of the rotor at rest. An electric pulse generator () for detecting an external magnetic field formed by a circuits for: measuring the electrical current in the coil after an electrical pulse has been triggered, comparing the measured electrical current with a reference current, measuring the time allowing measuring a rise time between triggering of the electrical pulse and the next time the electrical current flowing in the coil reaches the reference current, and processing the rise time to be able to determine whether the measured rise time indicates the presence of a given external magnetic field passing through the two isthmi.