Time adjusting means for electronic timepiece
AssigneeSeikosha Co., Ltd.
InventorsNakanobu Moritani, Toshihide Samejima, Toshio Matsumura, Hajime Oda, Masanori Fujita
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Abstract
Time adjusting means for electronic timepiece which detects change in the generation condition of pulses generated in response to a manual operation speed and generates a predetermined number of pulses in accordance with the detection output as the time-adjusting pulses. The time adjusting means enables a rapid time adjustment of an electronic timepiece at a high speed. When the manual operation speed exceeds a predetermined speed, the time adjusting means stops the time-adjusting pulse so as to prevent erroneous operation.
Claims7
A time adjusting circuit for an electronic timepiece, comprising:
- first pulse generation means for generating electrical pulses at a manually selectable frequency;
- detection means responsive to the electrical pulses from said first pulse generation means for detecting variation of the frequency of the electrical pulses and for developing an output signal having values to indicate when the frequency of the electrical pulses is within predetermined ranges;
- second pulse generation means responsive to the output signal from said detection means for generating a different predetermined number of output electrical pulse according to the value range within which the detection means output signal lies;
- and
- means for applying the output electrical pulses from said second pulse generation means as a time correction signal.
A time adjusting mechanism for an electronic timepiece, comprising:
- a manually rotatable member having a shaft mounted for rotation;
- switching means cooperative with said manually rotatable member for successively opening and closing at a rate determined by the speed of rotation of said manually rotatable member;
- pulse generating means for generating an electrical pulse signal in response to opening and closing of said switching means;
- first means comprising a counter responsive to pulses from said pulse generating means for developing an output signal everytime a predetermined interval of time is counted;
- second means for developing a selected predetermined number of pulses in response to the output signal from said first means;
- and
- means for applying the output pulses from said second means as time correction pulses.
Dependencies are inferred from the claim text.