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AssigneeThe Swatch Group Research and Development Ltd
InventorsLionel PARATTE, Donald William CORSON, Dominique LECHOT
Estimating the term…
Watch comprising a movement, with a timepiece balance wheel comprising a ring distinct from the balance rim, carried by a flange with respect to which this ring is movable in rotation to modify the position of inertia blocks elastically carried by the flange, each able to be indexed in different stable angular positions corresponding to a different inertia of the timepiece balance wheel, the movement further including an operating member movable between coupled and uncoupled positions which includes a stop means for immobilising the rim in a coupled position, and a control means for rotating the ring to modify the position of the inertia blocks in the coupled position, the watch including a crown controlling the control means, a rotating coupling ring controlling the coupling/uncoupling of the operating member through contactless interaction with an external adjustment tool.
A timepiece balance wheel with adjustable inertia, comprising a staff carrying, on the one hand, a rim via at least one arm, and on the other hand, an inner flange fixed to said staff and directly or indirectly carrying an outer ring with, between said inner flange and said outer ring, a plurality of first elastic guide connections, which are inertia balanced with respect to the axis of said staff and in a plane perpendicular to said axis, said outer ring being distinct from said rim and arranged to pivot with respect to said inner flange under the action of an external torque exerted against a resistant torque exerted by said first elastic guide connections, said balance comprising a plurality of inertia blocks each carried by said outer ring by means of at least one external flexible strip, wherein each said external flexible strip can be indexed in a stable angular position defined by the cooperation between a first indexing toothing carried by said inner flange and a second indexing toothing which is carried by said inertia block, and in that any rotation of said outer ring with respect to said inner flange modifies the angular position of said inertia blocks, said outer ring comprising guide shoulders sliding on supports comprised in said inner flange.
Dependencies are inferred from the claim text.