Magneto having auxiliary pole piece

Claim 1

IN A MAGNETO WHICH INCLUDES A DRIVEN ROTARY MAGNET HAVING A PLURALITY OF RADIALLY PROJECTING, CIRCUMFERENTIALLY SPACED POLES OF ALTERNATELY OPPSOITE POLARITY AND A RELATIVELY STATIONARY COIL-SUPPORTING CORE HAVING A PAIR OF RELATIVELY SPACED POLE SHOES POSITIONED IN THE PLANE OF ROTATION OF SAID MAGNT AND TERMINATING IN ARCUATE SURFACES DISPOSED IN CLOSELY ADJACENT, CIRCUMFERENTIALLY SPACED RELATION AROUND AN ARCUATE SEGMENT OF SAID MAGNET, THE SPACING BETWEEN THE POLE SHOES OF SAID CORE BEING SUBSTANTIALLY EQUAL TO THE CIRCUMFERENTIAL LENGTH OF EACH POLE OF SAID MAGNET; THAT IMPROVEMENT WHICH COMPRISES A RELATIVELY STATIONARY AUXILIARY POLE PIECE OF NONPERMANENT, MAGNETIC MATERIAL POSITIONED IN THE PLANE OF ROTATION OF SAID MAGNET AND IN CLOSELY ADJACENT RELATION TO ANOTHER ARCUATE SEGMENT OF SAID MAGNT AND SPACED CIRCUMFERENTIALLY AROUND SAID MAGNET FROM SAID COIL-SUPPORTING CORE, SAID AUXILIARY POLE PIECE BEING OF A SIZE TO CIRCUMFERENTIALLY SPAN MORE THAN ONE BUT NOT MORE THAN TWO ADJACENT POLES OF SAID MAGNET AND HAVING THE ENDS THEREOF DISPOSED AT A GREATER DISTANCE FROM THE POLE SHOES OF SAID COIL-SUPPORTING CORE THAN THE CIRCUMFERENTIAL LENGTH OF EACH OF THE POLES OF SAID MAGNET, SAID AUXILIARY POLE PIECE BEING FORMED ADJACENT SAID MAGNET WITH TWO RELATIVELY SEPARATED ARCUATE SURFACES CONNECTED BY AN INTERMEDIATE CUT-OUT PORTION.