Remote control visual acuity projection apparatus

Claim 1

VISUAL ACUITY PROJECTION APPARATUS COMPRISING: (A) A PROJECTOR INCLUDING A HORIZONTAL MOVABLE VERTICALLY SLOTTED MASK, A VERTICALLY MOVABLE HORIZONTALLY SLOTTED MASK AND A FILM CHART HAVING A PLURALITY OF VISUAL ACUITY TEST CHARACTERS LINEARLY MOVABLE PARALLEL TO ONE OF SAID MASK, SAID MASKS AND FILM CHART CONSTRUCTED AND ARRANGED TO BE CONTROLLABLY MOVED ACROSS THE LIGHT BEAM FROM SAID PROJECTOR AND COOPERATING TO EXPOSE SAID TEST CHARACTERS FOR PROJECTION BETWEEN PREDERERMINED LIMITS OF TRAVEL; (B) AN ELECTRICAL DRIVING MEANS INCLUDING AT LEST ONE REVERSIBLE MOTOR ADAPTED TO BE CONTROLLED ELECTRICALLY; (C)TRANSLATIONAL POWER MEANS INCLUDING A FIRST SPRING ATTACHED TO ONE OF SAID HORIZONTAL MASK, A PAIR OF ROTATABLY SUPPORTED DRUMS DRIVEN BY SAID ELECTRICAL DRIVING MEANS, ONE OF SAID DRUMS HAVING A FLEXIBLE CABLE WOUND THEREAROUND, ONE END OF WHICH IS ATTACHED TO ONE END OF SAID HORIZONTAL MOVABLE MASK AND THE OTHER END OF WHICH IS CONNECTED TO THE OTHER END OF SAID SPRING,A SECOND SPRING, A LINEAR MOTION MEMBER SUPPORTED FOR MOVEMENT PARALLEL TO SAID VERTICALLY MOVABLE MASK AND IN SPACED AND PERPENDICULAR RELATION TO SAID OTHER DRUM, ANOTHER FLEXIBLE CABLE WOUND ABOUT SAID OTHER DRUM, ONE END OF WHICH IS ATTACHED TO ONE END OF SAID LINEAR MOTION MEMBER AND THE OTHER END OF WHICH IS CONNECTED TO THE OTHER END OF SAID MEMBER THROUGH SAID SECOND SPRING, A CONNECTING ARM EXTENDING BETWEEN SAID LINEAR MOTION MEMBER AND SAID VERTICALLY MOVABLE MASK FOR CAUSING MOVEMENT THEREOF, AND MEANS DRIVABLY CONNECTING SAID ELECTRICAL DRIVING MEANS WITH SAID FILM CHART AND TRANSLATING THE MOTOR MOVEMENT OF SAID ELECTRICAL DRIVING MEANS INTO LINEAR MOVEMENT; (D) AND SWITCH MEANS ELECTRICALLY CONNECTED TO SAID ELECTRICAL DRIVING MEANS FOR CONTROLLING THE MOVEMENT OF SAID MASKS AND FILM CHART TO ONE OF AN INFINITE NUMBER OF POSITIONS BETWEEN SAID PREDETERMINED LIMITS OF SAID MASKS AND FILM CHART.