Audio-visual display apparatus

Claim 1

AN AUDIO-VISUAL DISPLAY APPARATUS COMPRISING THE COMBINATION OF A SOUND REPRODUCTION DEVICE AND A PROJECTOR; SAID SECOND REPRODUCTION DEVICE INCLUDING MEANS TO EMIT A SERIES OF SIGNALS AT PREDETERMINED INTERVALS, EACH SIGNAL HAVING AN APPRECIABLE TIME OF DURATION; SAID PROJECTOR INCLUDING A PROJECTION ZONE; MEANS RESPONSIVE TO EACH SIGNAL TO COMPLETE A CIRCUIT FROM AN ELECTRICAL POWER SOURCE TO SAID DRIVE MEANS TO INITIATE ITS ACTION SAID SIGNAL RESPONSIVE MEANS REMAINING ACTIVE FOR THE DURATION OF EACH SIGNAL; MEANS RESPONSIVE TO INITIAL MOVEMENT OF SAID DRIVE MEANS TO DISCONNECT IT FROM SAID FIRST CIRCUIT AND TO COMPLETE A SECOND CIRCUIT FROM AN ELECTRICAL POWER SOURCE TO SAID MEANS AND RESPONSIVE TO COMPLETION OF A PREDETERMINED CYCLE OF MOVEMENT OF SAID DRIVE MEANS TO DISCONNECT SAID SECOND CIRCUIT AND RECONNECT SAID FIRST CIRCUIT; AND ADDITIONAL MEANS ALSO RESPONSIVE TO INITIAL MOVEMENT OF SAID DRIVE MEANS TO BREAK SAID FIRST CIRCUIT AND ESTABLISH A HOLDING CIRCUIT TO SAID POWER SOURCE; SAID ADDITIONAL MEANS REMAINING ACTIVE FOR THE DURATION OF SAID SIGNAL TO HOLD OPEN SAID FIRST CIRCUIT AND PREVENT REPETITIOUS ACTUATION OF SAID DRIVE MEANS THROUGH ITS CYCLE OF MOTION IN RESPONSE TO THE SAME SIGNAL.