Invention
In 1924, American engineer Lloyd Espenschied invented the radio altimeter. In 1938, Bell Labs put Espenschied's device in a form that was adaptable for aircraft use. In 1938 in co-operation with Bell Labs, United Air Lines fitted a radar type device to some of its airliners as a terrain avoidance device.
Read more about this topic: Radar Altimeter
Famous quotes containing the word invention:
“His mind was great and powerful, without being of the very first order; his penetration strong, though not so acute as that of a Newton, Bacon, or Locke; and as far as he saw, no judgment was ever sounder. It was slow in operation, being little aided by invention or imagination, but sure in conclusion.”
—Thomas Jefferson (1743–1826)
“When she asked him about birth control, he sat down beside her and talked for half an hour about what a great woman Margaret Sanger was and how birthcontrol was the greatest single blessing to mankind since the invention of fire.”
—John Dos Passos (1896–1970)
“Out of countless memories, invention selects a few that become “the story of my life.””
—Mason Cooley (b. 1927)