Stop watch device

Details Stop watch device Stop watch device

1976-04-19

1978-05-16

Witkowski, Stanley J.

58 50R, 58 74, G04B 1934, G04C 300, G04F 1000

Patent

active

040891569

ABSTRACT:
A stop watch device has a time-counting circuit which is caused to count time by clock pulses from an oscillator and the count value of which is displayed on the display section. The time-counting circuit starts counting time in response to a time-count start instruction which is produced by operating a switching device. It stops counting time when the switching device is operated again at any time after the first operation. The stop watch device is further provided with a control circuit. The control circuit allows the time-counting circuit in its rest state to start counting time again in addition to the time already counted, when the switching device is operated again. It clears the count value of the time-counting circuit when the switching device is operated twice consecutively in a short time, either during the non-counting period of the time-counting circuit or during the counting period thereof.

REFERENCES:
patent: 3757509 (1973-09-01), Fujita
patent: 3789600 (1974-02-01), Champan
patent: 3795099 (1974-03-01), Tsuruishi
patent: 3854277 (1974-12-01), Samejima et al.
patent: 3884035 (1975-05-01), Jeannet et al.
patent: 3950935 (1976-04-01), Naito
patent: 3992871 (1976-11-01), Numabe

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