phonic wheel (English, noun)
expansion: phonic wheel (plural phonic wheels)
Senses:
topics: communications
electrical-engineering
engineering
natural-sciences
physical-sciences
telecommunications
telegraphy
glosses: A synchronous motor driven by a tuning fork that used an electromagnet to rotate the cogwheel of the motor by one tooth for each vibration.
tags: historical
Forms:
form: phonic wheels
tags: plural