Horology: time measuring systems or devices – Chronological – With mechanical or electromechanical driven display
Patent
1985-09-17
1986-11-18
Miska, Vit W.
Horology: time measuring systems or devices
Chronological
With mechanical or electromechanical driven display
368110, 368113, G04B 1904, G04F 800
Patent
active
046232605
ABSTRACT:
An electronic watch with a chronograph system has a second hand for displaying the normal time and chronograph time, minute and hour hands for the normal time, a chronograph minute hand and a chronograph hour hand. The watch has a first motor for driving the second hand, a second motor for driving the minute hand and hour hand, and a gear train for transmitting the output of the first motor to the second hand, chronograph minute hand, and chronograph hour hand. A resetting mechanism is provided for resetting the chronograph minute hand and chronograph hour hand to respective zero positions. A first circuit means operates the first motor to reset the second hand to the zero position, and a second circuit means operates for starting and stopping the first motor. The resetting mechanism, first and second circuit means are operated by external manipulating means, thereby changing a normal time display mode to a chronograph time display mode.
REFERENCES:
patent: 3884035 (1975-05-01), Jeannet et al.
patent: 4270197 (1981-05-01), Minowa
patent: 4364669 (1982-12-01), Thoenig et al.
patent: 4523857 (1985-06-01), Ushikoshi
patent: 4537514 (1985-08-01), Moriya
Citizen Watch Co. Ltd.
Miska Vit W.
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