Word: propellor
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Dates: during 1930-1939
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...them stumped up at the Architectural School. They say that Gropius can't understand it. It's a notched hard wood stick, with a nail stuck in the end and on the nail a propellor. You hold the stick in either hand and with the other rub a second stick, any shape, across the notches...
Round and round goes the propellor. When a finger of the rubbing hand is in one position, the propellor goes one way, when in another, the other...
Former meteorographs have carried a clock or propellor to operate the instrument, as was recently described in the CRIMSON. The difficulty lay in making a clock cheap enough to be lost after every ascension and in finding an efficient propellor. This instrument carries, however, simply a screw thread whose grooves are filled with an insulating material. On this bears a contact attached to an evacuated box such as is used in an ordinary aneroid barometer. Every time the contact crosses a thread, a corresponding interruption occurs in the radio signal. This signal was received on a rotating drum. The distance...