Keyboard training device

Claim 1

AN OPERATOR TRAINING DEVICE COMPRISING A TRAINING FILM WITH A PLURALITY OF FRAMES, EACH FRAME INCLUDING AN IMAGE AND A PLURAL CODE REPRESENTATION EQUIVALENT TO SAID IMAGE, MEANS FOR STEP-WISE MOVING EACH FRAME INTO A SENSING POSITION FOR A PREDETERMINED TIME PERIOD, COMPARATOR MEANS FOR RECEIVING A FIRST AND A SECOND SIGNAL PATTERN, SAID COMPARATOR MEANS INCLUDING A FIRST AND A SECOND BANK OF RELAY MEANS WHOSE CONTACTS PROVIDE A COMPLETED ELECTRICAL PATH OR AN OPEN CIRCUITED ELECTRICAL PATH DEPENDING UPON THE RESULTS OF SUCH COMPARISON, A TIMING CONTROL CIRCUIT HAVING MEANS FOR INITIALLY CLEARING SAID COMPARATOR MEANS AND FOR SENSING DURING THE TERMINAL PORTION OF EACH SAID PERIOD THE EQUALITY OR INEQUALITY OF RESPECTIVE SIGNAL PATTERNS APPLIED TO SAID COMPARATOR MEANS BY VIRTUE OF SAID COMPLETED OR SAID OPEN CIRCUITED ELECTRICAL PATH, CIRCUIT MEANS RESPONSIVE TO SAID PLURAL CODED VALUES ON EACH SAID FRAME TO PROVIDE A FIRST A SIGNAL PATTERN, KEYBOARD MEANS FOR PROVIDING A SECOND SIGNAL PATTERN, SAID KEYBOARD ENTERED PATTERN BEING PROVIDED BY AN OPERATOR WHO INDEXES PLURAL KEYS CORRESPONDING TO SAID FIRST SIGNAL PATTERN WITHIN EACH SAID PREDETERMINED TIME PERIOD, BOTH SAID FIRST AND SAID SECOND SIGNAL PATTERNS PROVIDING RESPECTIVE ENERGIZATIONS TO SAID FIRST AND SECOND BANKS OF RELAY MEANS, AND A FIRST INDICATOR MEANS ENABLED AT THE TERMINAL PORTION OF EACH SAID RESPECTIVE TIME PERIOD TO PERMIT A DETERMINATION TO BE MADE REGARDING THE EQUALITY OR INEQUALITY OF SAID KEYBOARD ENTERED PATTERN.