US 11,774,909 B2
Horological display mechanism with an elastic hand
Christophe Bifrare, Le Pont (CH)
Assigned to Montres Breguet S.A., L'Abbaye (CH)
Filed by Montres Breguet S.A., L'Abbaye (CH)
Filed on Feb. 26, 2021, as Appl. No. 17/186,146.
Claims priority of application No. 20176726 (EP), filed on May 27, 2020.
Prior Publication US 2021/0373497 A1, Dec. 2, 2021
Int. Cl. G04B 19/02 (2006.01); G04B 13/00 (2006.01); G04B 19/04 (2006.01); G04B 45/00 (2006.01); G04B 9/00 (2006.01); G04B 19/08 (2006.01); G04B 13/02 (2006.01)
CPC G04B 19/02 (2013.01) [G04B 9/005 (2013.01); G04B 13/001 (2013.01); G04B 13/007 (2013.01); G04B 13/008 (2013.01); G04B 13/021 (2013.01); G04B 19/042 (2013.01); G04B 19/048 (2013.01); G04B 19/082 (2013.01); G04B 45/0061 (2013.01); G04B 13/02 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A horological display mechanism with a variable geometry, including at least one elastic hand which includes a first drive pipe rigidly connected to a first end of a flexible blade, and a second drive pipe rigidly connected to another end of said flexible blade, and including a display index which, in an unstressed free state of said elastic hand in which both said first pipe and said second pipe are not subjected to any stress and are distant from one another, is distant from said first pipe and from said second pipe, a service position of said elastic hand being a stressed position in which said first pipe and said second pipe are coaxial to one another about an output shaft, said display mechanism including first means for driving said first pipe about said output shaft, and second means for driving said second pipe about said output shaft, said first drive means and second drive means being arranged to deform said flexible blade, by varying an angular position of said second pipe with respect to an angular position of said first pipe about said output shaft, and to vary a radial position of said display index with respect to said output shaft, wherein said display mechanism includes at least one mechanism of a differential type acting on a drive train of the first pipe and on a drive train of said second pipe and wherein said differential mechanism includes at least a first planetary wheel for driving said first pipe and/or a second planetary wheel for driving said second pipe, and at least one input planet-carrier chassis driven in rotation by motor means for driving said elastic hand, and wherein said display mechanism includes a torque-regulating mechanism acting on said input planet-carrier chassis.