Magnetic heading sensor alignment and roll reducing device

A magnetic heading sensor alignment and roll reducing device for substantially concentric installation in a flexible tubular housing, comprising:

• an elongated, axially extending rigid cage for housing a magnetic heading sensor having signal lines extending from one end thereof, said cage having spaced end walls with recessions in their respective ends;
• bearing means cooperating with each of said recessions for receiving the sensor's ends to enable the sensor to freely rotate about said cage's central longitudinal axis, wherein at one end of said cage, said cage and corresponding bearing means define a coaxial sleeve through which the signal lines may freely pass;
• counterweight means affixed to the sensor wherein the center of gravity of said counterweight means and the center of gravity of the sensor are located at the same axial loci;
• slip ring means, mounted to an outer face of said one end wall of said cage, for providing a rotating electrical connection with the signal lines;
• and
• a plurality of longitudinally extending strips of a non-magnetic metallic spring stock mounted in said end walls and disposed at equiangular positions about the periphery of said cage for cooperating with the inner surface of the tubular housing when said device is inserted therein and for resiliently maintaining said device at an axially concentric position therein.