Control for projectors operating from tape or timer impulses - has series of holes in slide mount to select order in which slides are shown

摘要

The projector control system is to govern the length and order of projection of slides in a system employing more than one projector either singly or in pairs. It has an overall taper recorder commentary or time controlling loop which gives slide change impulses to the projectors via transmitters and consists of a series of holes in the slide mount which are plugged with magnetic plugs sensed by sensors attached to the slide carrier of the projector. By selecting the appropriate combination of holes a sequence of slides may be shown singly or a blending of several elements from individual projectors is possible.