Science: The Path of Progress: Dec. 6, 1937

Patents granted various optimistic inventors by the U. S. Patent Office last week included the following:

¶ An apparatus for compressing air against the ear drums. Object: to exercise the ears.

¶ A net to protect cities from airplane bombardment. Suspended horizontally on springs, the net would catch the bombs as gently as if they were circus acrobats, prevent them from exploding.

¶ A magnetic device to prevent high-speed trains from jumping the track on curves. The centrifugal pull of the train as it rounds a bend would automatically increase the magnetic grip...

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