Remote control visual acuity test projector with electric motor carried by film chart and coupled to astigmatism test element

Claim 1

IN VISUAL ACUITY PROJECTOR APPARATUS, THE IMPROVEMENT COMPRISING: (A) A PROJECTOR INCLUDING A LIGHT SOURCE AND A FILM CHART ADAPTED TO BE CONTROLLABLY MOVED IN A VERTICAL PLANE ACROSS THE LIGHT BEAM FROM SAID PROJECTOR BETWEEN PREDETERMINED LIMITS OF TRAVEL, SAID FILM CHART INCLUDING VISUAL ACUITY TEST CHARACTERS AND AT LEAST ONE ROTATING ELEMENT OF TESTING ASTIGMATISM ROTATABLE BETWEEN PREDETERMINED LIMITS; (B) A FIRST ELECTRICAL DRIVING MEANS DISPOSED ON SAID PROJECTOR; (C) TRANSLATIONAL DRIVE MEANS DRIVABLY CONNECTED BETWEEN SAID FILM CHART AND SAID FIRST ELECTRICAL DRIVING MEANS FOR VERTICALLY MOVING SAID FILM CHART; (D) A SECOND ELETRICAL DRIVING MEANS ATTACHED TO THE UPPER END OF SAID FILM CHART AND CONNECTED TO AT LEAST SAID ONE ROTATING ELEMENT THEREOF INCLUDING A MOTOR CONNECTED TO REDUCTION GEARING, SAID MOTOR AND GEARING BEING DISPOSED ON THE UPPER END OF SAID FILM CHART ON THE SIDE NEAREST TO SAID LIGHT SOURCE, SAID SECOND ELECTRIC DRIVING MEANS BEING ADAPTED TO BE CONTROLLED ELECTRICALLY WHEN SAID FILM CHART IS DRIVABLY ENGAGED WITH SAID TRANSLATIONAL DRIVE MEANS; (E) A PAIR OF ELONGATED ELECTRICAL CONTACTS INSULATEDLY ATTACHED IN A VERTICAL DIRECTION ALONG SAID FILM CHART ADJACENT ITS UPPER VERTICAL END AND ELECTRICALLY CONNECTED TO SAID SECOND ELECTRICAL DRIVING MEANS; (F) A PAIR OF RESILIENTLY URGED ELECTRICAL CONTACTS INSULATEDLY ATTACHED TO SAID PROJECTOR AND ENGAGING SAID PAIR OF ELECTRICAL CONTACTS ON SAID FILM CHART WHEN SAID FILM CHART IS DISPOSED WITH IN A PREDETERMINED RANGE FROM ITS LOWER LIMIT OF TRAVEL; (G) AND CONTROL MEANS ELECTRICALLY CONNECTED TO SAID FIRST AND SECOND ELECTRICAL DRIVING MEANS FOR CONTROLLING THE MOVEMENT OF SAID FILM CHART.