Word: bolts
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Dates: during 1930-1939
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...Called a "fulchronograph," it gives a complete picture of a lightning stroke's intensity, from start to finish. Essential feature is a wheel with 400 iron fins on its rim, revolving at 3,400 r.p.m. A lightning arrester no bigger than a quart-size fruit jar receives the bolt, discharges it harmlessly through its coils. In these coils the lightning sets up a varying magnetic field in which the fulchronograph wheel spins. Each iron fin of the fulchronograph is magnetized according to the intensity of the field at the moment it passes through, and the result is an intensity...
Developed by Engineer Charles Frederick Wagner and his coworkers, the fulchronograph has been tried out on top of the University of Pittsburgh's skyscraper Cathedral of Learning. The record of one bolt passing through the arrester and dissected by the fulchronograph shows that it reached a crest of 21,000 amperes, then fell rapidly (in 100 microseconds) to 1,000 amperes, and from that point more slowly to zero. From start to finish the flash lasted one-sixtieth of a second. Engineer Wagner intends to acquire a complete gallery of different types of bolt, then redesign the arresting equipment...
Previous-lightning measurement has relied mainly on the oscillograph, which records the changing intensity of a bolt by means of an oscillating electron beam playing on photographic film. The fulchronograph is not only cheaper to use, says Westinghouse, but furnishes a clearer lightning picture...
...North Shore near Chicago, was one of the best spots in the U. S. for summer music. Sponsored now by a committee of Chicagoans, Ravinia is still good. Its opening week, fortnight ago, attracted the largest crowd in its history, more than 10,000 people. Last week, when bolt-upright, beaky, baldish Sir Adrian Boult, music director of British Broadcasting Corp., opened his second week with the Chicago Symphony, a heat wave melted the attendance. Those who braved the swelter heard, and lustily applauded the first complete U. S. performance of a top-notch piece of movie music: a seven...
...Martin Sibitzky went over the side of the Falcon and was lowered to. the deck of the Squalus. Under the terrible pressure in icy water, work was very slow. It took him 20 minutes to slide a shackle over a ring on the submarine's deck, clip a bolt through, tighten a nut. A cable was attached to the shackle. Before Sibitzky was back aboard the Falcon, nearly an hour later, the rescue bell, reeling in the line he had attached (see diagram), was pulling itself to the deck of the Squalus. There, two men working inside the chamber...