| 摘要 |
An alarm clock (11), in particular one driven as a radio alarm clock with an analog display, is intended to be capable of being fitted with an electromechanical signal enabling device (27) which is of small overall size and easy to handle, and whose accuracy of response conforms with the accuracy of display expected from a radio clock, and in any case has a response switching tolerance which is substantially shorter than the conventional cam engagement sensing mechanisms for alarm clocks. This requires interrogation for coincidence with the alarm time angle coding, which is provided by an hours switching dial (28), which displays in an analog fashion in front of the clockface (18) and can be manually rotated, as well as by a minutes switching dial (29) which is driven by the hours switching dial with a transmission ratio of 1:12. The minutes switching dial (29) preferably latches at minute intervals which can be interrogated and are numerically displayed by means of the dial (18) through a frontplate window (75). It is expedient for the conductor path patterns which are to be sensed by the switching dials (28, 29) and are short-circuited in a coding fashion to be constructed on the two mutually opposite surfaces of an insulator carrier (35) which is arranged axially in a stationary fashion between the two switching dials (28, 29). …<IMAGE>… |
