ring magnet

American  

noun

1. a ring-shaped permanent magnet.

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Etymology

Origin of ring magnet

First recorded in 1845–50

Example Sentences

Apple says the “dual-neodymium ring magnet motor” backing each driver is inspired by floor-standing speakers and is the reason you won’t hear any distortion even when the Max headphones are cranked to peak volume.

From The Verge • Dec. 16, 2020

I can't stop to explain this apparatus just now, but it is composed of a ring magnet, a copper tube which lies in an air gap of a magnetic field, and a stationary central armature.

From The Social Gangster by Reeve, Arthur B. (Arthur Benjamin)

It is found that with this steel coherer, a small amount of magnetism in the particles increases its sensitiveness, and to obtain this, a ring magnet is employed in connection with a coherer tube.

From Hertzian Wave Wireless Telegraphy by Fleming, John Ambrose

A copper disc, when inserted within the air gap of the ring magnet, was brought into rapid rotation.

From The inventions, researches and writings of Nikola Tesla With special reference to his work in polyphase currents and high potential lighting by Martin, Thomas Commerford

It was composed of a ring magnet, a copper tube lying in an air-gap in a magnetic field and a stationary central armature.

From The Romance of Elaine Sequel to "Exploits of Elaine" by Reeve, Arthur B. (Arthur Benjamin)