Alarm clock emitting a heartbeat-imitation pulse sequence/H0I In an alarm clock (1) with acoustic emission of a heartbeat- imitation pulse sequence (7) it is desirable to obtain and transmit such calming effects and at the same time to improve these effects themselves. For this purpose, it is intended to derive the imitation pulse sequence (7) from the time-holding electric circuit (12) for the clock time display device (2) and to emit these sequences electroacoustically via an audio final stage (15), for example by means of a cushion loudspeaker (8) connectable via a cable (10,. The imitation pulse sequence (7) is preferably obtained directly from the sequence of the switching pulses (13) of a stepping motor drive for a seconds hand, from which a pulse shaper circuit (17) can generate the double pulses characteristic of the heartbeat. With a bipolar stepping motor drive a bridgeable diode (19) results in a simple switching means between low and high frequency of the imitation

摘要

The clock has an extension cable (10) for a loudspeaker (8) which is combined with a cushion (9) so that sleep inducing signals can also be used. These are pulse signals, corresponding to the rate of the heart beats, and the pulses (13) generated for the clock section (2) are used. They are passed to the output stage (15) for the alarm section, which has a connection (11) for the extension cable. The pulses from the timing section (16) are used to operate a stepping motor for the clock, and can be diverted by a switching system to a pulse shaper (17) so that double pulses are obtained for each timing pulse, after being rectified by a diode (19) with a bridging switch (20) across it. A timing switch (6) follows the pulse shaper. ADVANTAGE - The circuit is simplified by using the timing pulses and also the sound reproducing system.