Stop watch

Details Stop watch Stop watch

1978-09-29

1980-07-08

Jackmon, Edith S.

Horology: time measuring systems or devices

Time interval

Electrical or electromechanical

368101, 368106, 368110, G04F 700, G04F 1004

Patent

active

042110661

ABSTRACT:
A stop watch comprising a second hand and a subsecond hand includes manually actuatable switches for producing start, stop and reset instruction signals. A first stepping motor and a first drive controller for the stepping motor drives the second hand, while a second stepping motor and a second drive controller drives the subsecond hand. The second drive controller includes a counter for counting subsecond clock pulses in response to the start signal for effecting the display of the contents of the counter by the subsecond hand in response to the stop signal.

REFERENCES:
patent: 3795099 (1974-03-01), Tsuruishi
patent: 3884035 (1975-05-01), Jeannet et al.

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