This invention relates to a device adapted to be connected to an electrical appliance, such as a clock radio, to visually and audibly give an alarm in the event of a power failure.
Clock radios are commonly used to sound an alarm to awaken a sleeping person at a particular predetermined time. In the event of a power failure unbeknown to the sleeping person, the clock will be turned off during the period of failure and restored after the failure has been corrected. The clock will therefore indicate the incorrect time and the alarm to awaken the sleeping person will be sounded at a time later than desired by an amount equivalent to the period of the failure. This invention provides an alarm device which will provide an audible signal at the time of the power failure to awaken the sleeping person and alert him to the fact of the failure, so the clock can be reset to compensate for the time period of the failure. In the event the audible alarm is not heard, a visual alarm is simultaneously activated to indicate to the sleeping person that a power failure has occurred when he awakens.