interruptor
/ˌɪn.təˈrʌp.tɚ/
noun
- A device that opens and closes an electrical circuit, especially in a timer or signaling system.
- The interruptor in the old clock made a ticking sound as it switched on and off.
- He replaced the faulty interruptor to fix the blinking light.
- Early telephones used an interruptor to generate a ringing signal.