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:
“Heredity is a strong factor, even in architecture. Necessity first mothered invention. Now invention has little ones of her own, and they look just like grandma.”
—E.B. (Elwyn Brooks)
“Learn of the green world what can be thy place
In scaled invention or true artistry,”
—Ezra Pound (1885–1972)
“Out of countless memories, invention selects a few that become “the story of my life.””
—Mason Cooley (b. 1927)