Electrically driven timepiece with horizontal dial 14 ft in diam, represents what is believed to be first attempt to give time from ground to airplanes while in flight; it is also largest clock yet in operation driven by synchronous electric motors running in step with ac supply mains.
Heston air port clock
Engineer
Engineer ; 155 , n 4022
1933
Aufsatz (Zeitschrift)
Englisch
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