Gray Research Telop Machine, Television’s First Optical Projection System
Here is a rare copy of the 1953 Gray catalog with a price list at the end. This machine was able to televise opaque cards, which was the forerunner of transparent slides. It also had add on features that would allow a news type horizontal ticker scroll across the bottom of the screen (on real ticker tape) and a vertical scroll for credits. All the networks depended on them heavily for station breaks and promos, and the were also widely used at local stations.