US 12,169,393 B2
Automatic time correction in a watch
Pascal Lagorgette, Bienne (CH)
Assigned to ETA SA Manufacture Horlogère Suisse, Grenchen (CH)
Filed by ETA SA Manufacture Horlogère Suisse, Grenchen (CH)
Filed on May 14, 2021, as Appl. No. 17/320,583.
Claims priority of application No. 20180687 (EP), filed on Jun. 18, 2020.
Prior Publication US 2021/0397137 A1, Dec. 23, 2021
Int. Cl. G04G 5/00 (2013.01); G04C 3/14 (2006.01)
CPC G04G 5/00 (2013.01) [G04C 3/14 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A correction method of a displayed time for a self-correcting watch; said self-correcting watch comprising an analog display of a time and of a date, at least one receiving member, at least one detecting member and at least one processing unit for implementing said correction method; said correction method comprising at least one:
receiving at least one datum by said at least one receiving member; said at least one datum comprising a current time;
detecting a passing of the time displayed by the watch at a given time between a first period and a second period by said at least one detecting member;
calculating in the processing unit a difference between said given time and said current time incremented by a time interval measured from said receiving at least a datum until said detecting a passing of the time;
correcting the time displayed by the analog display as a function of said difference calculated by said processing unit,
wherein said detecting said passing of the time comprises detecting a change of date by detecting a change in the torque of a motor from driving of a date disc of said analog display.