Permanent magnet A.C. signal generator

The sub-fractional A.C. signal generator comprising:

• an annular coil support of insulator material of U-shaped cross-sectional configuration having a plurality of integral alignment bosses on each side wall;
• an electrical coil wound upon the coil support;
• a pair of annular, magnetically permeable stator members of C-shaped cross-sectional configuration, each stator member having a plurality of alignment apertures fitted onto the alignment bosses on one side wall of the coil support to afford a stator sub-assembly, each stator member having a multiplicity of individual pole pieces interleaved one-for-one with the pole pieces of the other stator member around the outer periphery of the stator sub-assembly;
• an insulator barrier member;
• a cylindrical stator support having a sleeve bearing mounted co-axially therein;
• the insulator barrier and the stator sub-assembly being mounted on opposite ends of the stator support to afford a stator assembly;
• a drive shaft;
• a cylindrical permanent magnet magnetized to afford a multiplicity of magnetic poles, corresponding to the total number of pole pieces on the stator members, facing a central axial opening having a diameter slightly larger than the outer diameter of the stator members;
• magnet mounting means mounting one end of the magnet onto the shaft for rotation therewith, to afford a rotor assembly;
• the rotor assembly and stator assembly being joined in a generator by sliding the two assemblies together with the rotor shaft journalled in the stator bearing and the magnet encompassing the stator members but spaced therefrom by a small, uniform radial air gap;
• and
• a housing encompassing both assemblies and maintaining the two assemblies in axial alignment.