William Wiegand discerned the influence of different fillers such as carbon black, heavy spar and chalk on the strength of rubber. Thanks to his research, tires now last five times as long as they did before.
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Wil-Tel Automatic Oil Signal
In 1924, Kitchener’s own Wilfrid H. Schlee invented the signal light on a car’s instrument panel that warns a driver of low oil pressure.