Dictionary
Words, grammatical forms and meanings linked to the ontology.
hammer break en · NOUN
Meanings
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An interrupter in which contact is broken by the movement of an automatically vibrating hammer between a contact piece and an electromagnet, or of a rapidly moving piece mechanically driven.
[…] a form of contact device was adopted of the commutator and brush type, having rubbing contacts only, and doing away with all platinum points and hammer breaks.
1903, The Horseless Age, volume 11, page 645:
Forms