Improvements in and relating to position responsive apparatus.

摘要

The effective operating range of an actuator magnet (12) on a position detecting array (20) of solid-state Hall effect devices (22) is improved by the use of flux concentrating elements (24) which direct the flux (30) along the array of sensing devices (22). The flux concentrating elements (24) comprise a series of rods each having a magnetic permeability substantially greater than that of free space, such as soft ferrite, which are placed in alignment with and between each sensing device in the array. <IMAGE>