Robinson reconstruction

Robinson’s task was to read two synchronised paper tapes at the same time and to make decisions depending on what was on these tapes.

In the 1940’s paper tape was used by teleprinter machines. Teleprinters were something like typewriters, but they had the ability to communicate with other teleprinters anywhere in the World. If this sounds familiar then this was the 1940’s version of the internet!

Before attempting to run the two tapes in parallel, there are several major project elements:

  • the photo-electrics
  • the photo-mechanics
  • keeping the tapes together
  • the amplifiers for the photoelectric cells
  • the combining logic which processes the outputs from the photo-electric cell amplifiers
  • displaying the outputs and a power supply to drive the whole shooting match!

Enough to keep us out of trouble for a while!