spring switch
noun
: a switch consisting of a pair of split switch points held in running position by a stiff coil spring and designed to return to that position after being thrown over by trailing wheels from the diverging route
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“Spring switch.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/spring%20switch. Accessed 26 Nov. 2024.
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