Electronic timepiece

Details Electronic timepiece Electronic timepiece

1980-03-06

1981-02-24

Miska, Vit W.

Horology: time measuring systems or devices

Chronological

With mechanical or electromechanical driven display

368187, G04B 1904, G04C 900

Patent

active

042531748

ABSTRACT:
A time resetting operation in an electronic timepiece requires blocking of the stepping motor 1, and block of the mechanical type is avoided by the invention. A STOP switch 10 actuated by a time resetting stem of the timepiece sets to state "1" a flip-flop 11 which blocks gates 12 and 13 for controlling the passage of the pulses which drive the motor 1 through a feed circuit 2. The circuit 2 then passes a continuous current in the same direction as the last drive pulse. Thus, triggering of the continuous current leaves the position of the rotor unchanged. A counter 14 counts 1-second pulses and then resets the flip-flop 11, which causes the motor to resume normal operation. This avoids excessive discharging of the battery of the electronic timepiece if the user forgets to return the stem to its initial position after a time resetting operation.

REFERENCES:
patent: 3655698 (1972-05-01), Dome
patent: 4031448 (1977-06-01), Adachi
patent: 4037402 (1977-07-01), Sieber

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