It appears that Richards deployed two methods of control. One was the use of remote wireless where a hidden person was able to answer the questions asked. One of the articles suggested the technology was used under licence from Marconi patents. Richards says Eric cannot think so he had between 50-60 questions pre-prepared, otherwise the anser was ‘”I do not know, sir (or madam)” , getting the gender correct further giving away the fact that a hidden person was providing the answers. The second method was the direct control of Eric’s movements using voice control by uterring numbers which made a certain rate of vibration on a wire inside the man to the corresponding number to trigger a circuit.
This RUR Information is brought to you through the Courtesy of: cyberneticzoo.com/Eric Robot – Capt. Richards & A.H. Reffell, 1928