发明授权
US3992871A Chronograph wristwatch 失效
计时手表

Chronograph wristwatch
摘要:
An electronic timepiece having a single digital display and being suitable to operate as a standard timekeeping wristwatch or in the alternative as a chronograph. Separate divider circuits are provided for performing the timekeeping and chronograph functions. A single set of switches is provided for controlling the operation of either divider circuit, a single selector circuit selecting which function is to be displayed and which divider is to be controlled by the switches. Indication means are provided for indicating which function is being displayed.
信息查询
0/0