Electronic timepiece

Details Electronic timepiece Electronic timepiece

1977-05-13

1979-10-09

Witkowski, Stanley J.

58 4A, 58 395, 58 58, 58 74, 58 855, G04C 300, G04C 900, G04F 1004

Patent

active

041701054

ABSTRACT:
An electronic timepiece which comprises a time-counter for counting a number of reference clock pulses issued from a reference oscillator; a control circuit for controlling the selection of various functions; a display device for displaying count values corresponding to the various functions; and at least two independently provided manually operative switching devices. The condition in which the at least two switching devices are jointly operated is detected by an AND circuit. The period of time during which the AND circuit continues to send forth an output signal indicating the joint operation of the two switching devices is measured and a function-designating circuit specifies that one of the various functions instructed by the control circuit which corresponds to the measured period of time of joint operation of the two switching devices. Any function specified by the function-designating circuit is carried out by one of the at least two switching devices.

REFERENCES:
patent: 3994124 (1976-11-01), Fujita
patent: 4023345 (1977-05-01), Imamura
patent: 4034551 (1977-07-01), Ushiyama
patent: 4058971 (1977-11-01), Epperson
patent: 4090350 (1978-05-01), Nomura

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