knife-switch

knife switch

noun Electricity.
a form of air switch in which a moving element, usually a hinged blade, is placed between two contact clips.

Origin:
1905–10

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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Collins
World English Dictionary
knife switch
 
n
an electric switch in which a flat metal blade, hinged at one end, is pushed between fixed contacts

Collins English Dictionary - Complete & Unabridged 10th Edition
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