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Mechanical timepiece with posture detector and the posture detector

  • US 20030137901A1
  • Filed: 10/08/2002
  • Published: 07/24/2003
  • Est. Priority Date: 12/20/2000
  • Status: Abandoned Application
First Claim
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1. A mechanical timepiece characterized in a mechanical timepiece comprising a mainspring constituting a power source of the mechanical timepiece, a front train wheel rotated by a rotational force in rewinding the mainspring and an escapement and speed control apparatus for controlling rotation of the front train wheel, said escapement and speed control apparatus being constituted to include a balance with hairspring alternately repeating right rotation and left rotation, an escape wheel &

  • pinion rotated based on the rotation of the front train wheel and a pallet fork for controlling rotation of the escape wheel and pinion based on operation of the balance with hairspring, further comprising;

    a switch mechanism (168, 168a, 168b) constituted to output a signal of ON when a rotational angle of the balance with hairspring (140) becomes equal to or larger than a predetermined threshold and outputting a signal of OFF when the rotational angle of the balance with hairspring (140) does not exceed the threshold value;

    a balance with hairspring rotational angle control mechanism (140e, 180) constituted to exert a force for restraining rotation of the balance with hairspring (140) to the balance with hairspring (140) when the switch mechanism (168, 168a, 168b) outputs the signal of ON; and

    an attitude detecting apparatus for detecting an attitude of the mechanical timepiece;

    wherein operation of the balance with hairspring rotational angle control mechanism (140e, 180) is constituted to control based on a result of detecting the attitude of the mechanical timepiece detected by the attitude detecting apparatus;

    wherein the attitude detecting apparatus includes a spherical case (610a) and a plurality of patterns (A through G) arranged at an inner face of the case (610a) and a metal ball (608) contained in the case (610a); and

    wherein the attitude detecting apparatus is constituted to detect the attitude of the mechanical timepiece by bringing the metal ball (608) into contact with the patterns (A through G).

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