- Round Dial Voltmeter of Kelvin Siphon Recorder, dead beat moving coil type, with front removed.
The Galitzin seismograph, devised by Prince Galitzin, is of the same type, but it essentially differs from the Milne instrument in having its pendulum dead-beat; this is brought about by an electromagnetic device.
The currents induced in the coil are led to a dead-beat D'Arsonval galvanometer having the same natural period of vibration as the pendulum.
The resistance offered by the air to a needle of such light construction suffices to render the motion nearly dead-beat.
The loop and mirror move in a cavity full of oil to render the system dead-beat.