Tunnel diode drive device for electric watches
阅读：260发布：2021-04-05
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1. IN A WRIST WATCH, HAVING A BALANCE WHEEL MOUNTED FOR OSCILLATORY MOVEMENT AND AN ASSOCIATED HAIR SPRING, THE COMBINATION OF A COIL ON SAID WHEEL COMPRISING TWO SPACED AND SUBSTANTIALLY RADIAL ARMS INTERCONNECTED AT THEIR INNER AND OUTER ENDS TO COMPLETE A CLOSED LOOP EXCEPT AT ITS TWO TERMINALS, A PAIR OF MAGNETS PROVIDING TWO PARALLEL FIELDS OF OPPOSITE POLARITY NORMAL TO AND INTERSECTING THE PATH OF SAID COIL ARMS AND SPACED APART BY SUBSTANTIALLY THE SAME DISTANCE AS SAID ARMS, AND A TUNNEL DIODE AND SOURCE OF UNIDIRECTIONAL CURRENT IN SERIES WITH SAID COIL AND EACH OTHER, THE SAID SOURCE NORMALLY BIASING SAID DIODE FOR OPERATION ABOUT THE TROUGH POINT OF ITS CHARACTERISTIC CURVE, AND SAID COIL AND SAID FIELDS BEING SO RELATED THAT A PULSE INDUCED IN THE COIL BY MOVEMENT OF ITS ARMS INTO SAID FIELDS IN ONE DIRECTION DECREASES THE VOLTAGE ACROSS SAID DIODE, WHEREBY THE CURRENT FLOWING IN SAID COIL FROM SAID SOURCE IS INCREASED TO GENERATE TWO SIMULTANEOUS UNIDIRECTIONAL DRIVING FORCES ON SAID COIL ARMS TO MOVE IT IN THE DIRECTION OF SAID ENTRANCE MOVEMENT.
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