Theory of Machine
In gramophones for adjusting the speed of the turntable, the following type of governor is commonly employed

Inertia governor
Wilson Hartnell governor
Pickering governor
Hartung governor

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Theory of Machine
A body in motion will be subjected to Coriolis acceleration when that body is

In plane rotation with variable velocity
Restrained to rotate while sliding over another body
In plane translation with variable velocity
In plane motion which is a resultant of plane translation and rotation

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