| 释义 |
electric clock
noun
: any of various clocks operated by electricity:
a. : a clock having a spring or weighted arm that is wound at regular intervals by an electric motor
b. : a clock whose pendulum is kept in vibration by electromagnetic impulse
c. : one of a system of electrically operated clocks consisting of a master clock and a number of sympathetic clocks
d. : a clock connected with an electromagnetic recording apparatus
e. : a clock having neither pendulum nor balance, consisting simply of a small alternating-current motor that drives the clock hands through a reducing train of gearing, and telling time by current controlled at the generator to a definite rate of alternations per second |