The mainspring is therefore protected against any excessive winding which could damage it.Īccording to the invention, between bottom 42 of crown 40 and the uppermost spring in the pile of three springs 50, a stud 86 is inserted, which plays the part of a shim or stop member for preventing spring 50 from coming into contact with bottom 42 of crown 40. As a result, crown 1 will rotate uselessly when actuated by the user. When the resisting torque supplied by spring elements 6 becomes greater than the predetermined value because the mainspring is completely wound, said spring elements 6 will deform elastically in response to actuation of rigid ring 22 and will slide away therefrom. In turn, spring elements 6 drive pipe 14, on which they are mounted, and thus the winding stem. Provided the resisting torque supplied by spring elements 6 is less than a predetermined value, said elements are driven in rotation by rigid ring 22, as a result of activation of crown 1 by the user. Notched ring 22 is integral with crown 1, whereas spring elements 6 are secured to pipe 14 onto which a winding stem, which acts on the winding mechanism for the mainspring, is screwed.
This disconnecting mechanism essentially includes a rigid ring 22, including, on the periphery thereof, a plurality of notches 24 intended to cooperate with one or several generally circular spring elements 6 to perform the disconnecting function. As will have been clear from the foregoing, crown 1 delimits a hollow inner recess which houses the disconnecting mechanism. On the external surface thereof, crown 1 has a plurality of grooves for facilitating the handling of crown 1 by the user. G04B3/06- Keys or the like with means preventing overwinding.G04B3/00- Normal winding of clockworks by hand or mechanically Winding up several mainsprings or driving weights simultaneously.G04B- MECHANICALLY-DRIVEN CLOCKS OR WATCHES MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS.238000004804 winding Methods 0.000 title claims abstract description 28.Assignors: BONNET, PIERRE-JEAN, ZIMMERMANN, GEORGES Publication of US20110228646A1 publication Critical patent/US20110228646A1/en Application granted granted Critical Publication of US8602639B2 publication Critical patent/US8602639B2/en Status Active legal-status Critical Current Adjusted expiration legal-status Critical Links ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS).
Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.) Filing date Publication date Priority claimed from EP10156794.9 external-priority Application filed by Meco SA filed Critical Meco SA Assigned to MECO S.A. Original Assignee Meco SA Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.) ( en Inventor Georges Zimmermann Pierre-Jean Bonnet Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Granted Application number US13/050,368 Other versions US8602639B2 Google Patents US20110228646A1 - Winding crown for a timepiece US20110228646A1 - Winding crown for a timepiece
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