Patent ID: 7029169
Filing Date: 2006-04-18
Classification: G04F

Abstract:
1. A chronograph timepiece having a power source comprised of a main spring provided in a barrel complete, mounted for undergoing rotation, the chronograph timepiece comprising: a main plate forming a base plate of a movement; a surface train wheel for undergoing rotation in accordance with rotation of the barrel complete; an escapement/speed control apparatus for controlling rotation of the surface train wheel; a second chronograph train wheel, comprising a second chronograph wheel & pinion having a second heart cam; a chronograph second hand connected to the second chronograph wheel & pinion for indicating second time; a minute chronograph train wheel comprising a minute chronograph wheel & pinion having a second heart cam; a chronograph minute hand connected to the minute chronograph wheel & pinion for indicating minute time; an hour chronograph train wheel comprising an hour chronograph wheel & pinion having an hour heart cam; a chronograph hour hand connected to the hour chronograph wheel & pinion for indicating hour time; a hammer for contacting the hour heart cam, the minute heart cam and the second heart cam to zero the hour chronograph wheel & pinion, the minute chronograph wheel & pinion and the second chronograph wheel & pinion, respectively; and a reset button for controlling operation of the hammer to zero the hour chronograph wheel & pinion, the minute chronograph wheel & pinion and the second chronograph wheel & pinion; wherein a straight line connecting a rotational center of the second chronograph wheel & pinion and a rotational center of the hour chronograph wheel & pinion is disposed at an angle of 90 degrees relative to a straight line connecting the rotational center of the second chronograph wheel & pinion and a rotational center of the minute chronograph wheel & pinion; and wherein when the hammer is brought into contact with the hour heart cam; the second heart cam; the minute heart cam, a position of the hammer is determined only by the hour heart cam, the second heart cam and the minute heart cam, respectively and a direction of a pressing force exerted to the hammer passes the rotational center of the second chronograph wheel & pinion.