GROUP COMMUNICATIONS

APPARATUS FOR THE STAGING OF AUDIO VISUAL DISPLAYS, INCLUDING ELECTRICALLYOPERATED APPARATUS FOR THE CUING OF SPEAKERS AND ACTORS BY MEANS OF SCRIPTS ADVANCED IN CONFORMITY WITH THE ACTION AND/OR DIALOGUE OR MONOLOGUE TO BE PRESENTED, AND ELECTRICAL DRIVING, SWITCHING AND SPEED CONTROL EQUIPMENT THEREFOR, PROJECTORS, SLIDE SELECTORS, CARD READERS, SEQUENCE SELECTORS, LIGHTING CONTROL APPARATUS, RELAY CONTROL PANELS, AND ELECTRICAL CIRCUIT CONTROL APPARATUS