Patent ID: 7598733

Claim:
Detector for detecting movements, comprising: a moveable exciter magnet (EM); only one ferromagnetic element (FE) having Weiss regions and Bloch walls; an induction element (SP 1 ) surrounding said ferromagnetic element (FE); a second induction element (SP 2 ) surrounding said ferromagnetic element; said induction element (SP 1 ) provides a first output ( 22 ) at time Ts when said ferromagnetic element (FE) is triggered and remagnetized by said exciter magnet (EM); said second induction element (SP 2 ) provides a second output ( 23 ) substantially but not precisely simultaneously with said first output at time (Ts) when said ferromagnetic element (FE) is triggered and remagnetized by said exciter magnet (EM) without further movement of said exciter magnet (EM); and, said first ( 22 ) and second ( 23 ) outputs are shifted in time with respect to each other, said time shift and sequence of occurrence of said first ( 22 ) and second ( 23 ) outputs determines the direction in which said remagnetization of said ferromagnetic element is triggered and the polarity and position of said exciter magnet (EM).