Word: wristbands
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Dates: during 1950-1959
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Radioactive Guard. To protect factory workers, Hazatrol Corp. of San Francisco has developed a radioactive leather wristband that stops machines when a careless worker endangers himself. The wristbands are radioactive enough to set off a Geiger counter that controls a safety-stop mechanism. But the radioactivity is too low to harm workers. Installed price of the control mechanism: about...