Inventions, discoveries, innovations reported during the past seven days, included:
Radio "Separator." In Berwyn, Chicago suburb, radio engineers crowded around L. William Skala, young graduate of the University of Prague, to observe his demonstration of a device for separating two radio messages sent simultaneously by different transmitters set at the same frequency. A wave-metre showed that the transmitters were on identical wave lengths. The "beat" note or interference whistle was heard in the receiver before the test. Then Skala attached one of his devices to each transmitter and one to the receiver....
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