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Woodruff key

From Wiktionary, the free dictionary

English

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English Wikipedia has an article on:
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Etymology

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Developed by William N. Woodruff of Hartford, Connecticut.

Noun

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Woodruff key (plural Woodruff keys)

  1. (engineering) A semicircular key that fits partly into a circular segment keyway, with the remainder fitting into a longitudinal slot keyway in the mating part.