Electronic watch with reaction timer

Claim 1

An electronic watch capable of measuring the time in which a user of the watch reacts to a stimulus the occurrence of which is unknown to and independent of control of the user, comprising: oscillator means for generating clock signals; first display means providing the stimulus to signal the start of a reaction time test sequence; generator means coupled to said first display means for automatically activating said first display means independent of external control; counter means for counting said clock signals, said counter means being reset by said generator means simultaneous to actuation of said first display means; control means operatively coupled to said counter means for stopping the count thereof, said control means being manually operable by the user of the watch in response to the actuation of said first display means such that the count of said counter means is a measure of the reaction time of the user; means for memorizing a time reference; comparator means for comparing the reaction time represented by the count of said counter means with said memorized time of reference; and second display means controlled by the output of said comparator for delivering a warning whenever the reaction time exceeds said time of reference.