Definitions for "In-phase"
a condition of two waveforms when they cross the reference line at the same time and in the same direction.
Two signals having the same waveforms that are in perfect synchronization with each other. There is no phase difference between them at any frequency. The signals will add (constructively interfere). See: Acoustical Interference.
the component of the measured secondary field that has the same phase as the transmitter and the primary field. The in-phase component is stronger than the quadrature phase over relatively higher conductivity.
Keywords:  yoke, shaft, slip, coupling, forward
The in-line relationship between the forward coupling-shaft yoke and the drive-shaft slip yoke of a two-piece drive line.