safety chain

noun

Definition of safety chain

  1. 1a :  a normally slack chain for preventing excessive movement between a railroad car truck and a car body in sluing b :  a heavy chain by which railroad cars may be connected to protect against accidental uncoupling

  2. 2 :  a small chain used as a secondary safeguard on a piece of jewelry (as a watch or bracelet)

  3. 3 :  a chain formed of sheet metal links with an elongated hole through each broad end and constructed by a repeated series of doubling a link upon itself, slipping the next link through the two now superimposed holes of the first, and doubling it

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1822

First Known Use of safety chain

1822


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