Patent ID: 6871555
Filing Date: 2005-03-29
Classification: G01L,H01F,Y10T

Abstract:
1. A magnetic transducer element comprising: a member of magnetisable material having an axis about which it is subjectable to torque or is capable of flexing; said member being remanently magnetised to have an annulus of axially-directed magnetisation about said axis, said annulus of magnetisation emanating an external magnetic field that exhibits a) no significant component of circumferentially (tangentially)-directed magnetic flux (with respect to said axis) externally of said member when the member is subject to torque applied thereto about said axis and/or to a force causing the member to flex about said axis, and b) a significant component which is other than circumferentially (tangentially)-directed and which varies as a function of torque or of flexing of the member about said axis.