ELECTRONIC STOPWATCH WITH ELAPSED TIME ALARM

摘要

An electronic stopwatch which provides both for visible display of the elapsed time during operation of the stopwatch and which also can provide an audible alarm at the end of equal successive time periods during operation of the stopwatch. The means which connects the stopwatch counter to the time keeping circuitry also feeds a separate counter which at the end of each of the chosen time periods, produces an output which sounds an alarm. A switch is provided for preventing operation of the counter for the alarm and a plurality of alarm counters can be provided so that the operator can choose the time periods at which the alarm will be sounded.