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AssigneeETA SA Manufacture Horlogere Suisse
InventorsMurielle RICHARD, Fabrice GANGUIN
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A device for measuring horological shakes, including a structure carrying an articulated mechanism with a compliant mechanism having a linear force/stroke characteristic connecting a first fixed element to a second element capable of moving linearly under the effect of an actuator manoeuvring same in a contactless manner in both directions, and a position sensor determining the position of the second element in a direction, and a load sensor determining the variation in the axial pushing or pulling load of the second element carrying a gripper clamping a mobile component, and/or the variation in the gradient of this load, generating a signal for triggering the position measurement during each sudden change in gradient of the load in each direction of running, to determine the shake of the mobile component, by comparing the positions measured during the sudden changes in gradient during the outward and return strokes.
A device for measuring horological shakes comprising a structure carrying an articulated mechanism comprising a gripper arranged so as to clamp a horological mobile component within a horological assembly or an assembled horological movement, wherein said articulated mechanism comprises a first element fixed to said structure, and relative to which a second element is capable of undertaking a substantially linear movement under the effect of at least one actuator arranged so as to manoeuvre, in a contactless manner and in both directions, said second element substantially parallel to a measurement direction, in that said articulated mechanism comprises a compliant mechanism with necks and/or flexible strips, having a substantially linear force/stroke characteristic, connecting said second element to said first element, and wherein said device comprises at least one position sensor arranged to determine the position of said second element in said measurement direction, and at least one load sensor arranged to determine the variation in the axial pushing or pulling load of said second element carrying said gripper, and/or the variation in the gradient of said load, and to send, to a control system comprised in said device, a signal for triggering the position measurement during each sudden change in gradient of the load in each direction of running, and to determine the value of the shake E of said mobile component within the assembly in which it is mounted, by comparing the position values measured in the two positions in which a sudden change in gradient occurs during the outward stroke and the return stroke.
Dependencies are inferred from the claim text.