US 4,379,642 AGranted

Apparatus for the selection or correction of data in an electronic watch

AssigneeEbauches S.A.

InventorClement Meyrat

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Abstract

The apparatus comprises commutating means 10 operated by the rotation in one direction or the other of the watch spindle 1, which rotation produces trains of commutation pulses that are phase-displaced with respect to each other. The watch circuit produces from the trains of commutation pulses a signal indicating the direction of rotation of the spindle and produces selection or correction pulses. The commutating means comprise two cams 2, 3 mechanically coupled to the rotatable spindle 1, angularly displaced one with respect to the other and arranged to actuate two resiliently flexible strips 4, 5 which are fixed at one of their free ends and the other free ends of which are alternately brought into contact with and removed from respective fixed contacts 7, 8. The watch circuit can include means for rendering ineffective a predetermined number of selection pulses at the beginning of the rotation of the spindle in one direction or the other.

Claims7

Dependent claims

Apparatus for the selection or the correction of data in an electronic watch provided with a rotatable spindle, the apparatus comprising commutation means operated by the rotation of the spindle in one direction or the other and arranged to produce two series of commutation pulses which are phase-displaced with respect to each other, the sign of the phase displacement depending on the direction of rotation of the spindle, and a circuit responsive to the series of commutation pulses to provide a signal indicating the direction of rotation of the spindle and to produce selection or correction pulses, the commutating means comprising two cams mechanically coupled to the rotatable spindle and angularly displaced one with respect to the other and two resiliently flexible strips of electrically conductive material each of which cooperates with a respective one of the cams and has one fixed end and one free end, the free end of each strip being alternately brought in contact with and moved away from a respectively fixed contact during the rotation of the spindle.

Dependencies are inferred from the claim text.