Device Shows Bus Location (May, 1938)
Device Shows Bus Location
LONDON Transport plans to try an experiment never before attempted anywhere in the world, and if successful for regular use, will give the main office of a bus transportation company a “picture” of the city’s moving buses.
Each bus will carry on its roof a coil of wire through which will pass an alternating current. At certain fixed points a wire will be suspended across the road where the bus will pass. As it passes, it induces a current in the wire which in turn records the passing on the “clock.”