1. A MAGNETIC FORCE SWITCHING DEVICE COMPRISING A POWER MAGNET MEANS; TWO MEANS MAGNETICALLY ENGAGING RESPECTIVE POLES OF SAID POWER MAGNET MEANS INTERMEDIATE THEIR ENDS, SAID TWO MEANS BEING COMPOSED OF A FERROMAGNETIC MATERIAL HAVING A COERCIVENESS HIGHER THAN THAT OF SOFT IRON; TWO MAGNETIC ARMATURES MAGNETICALLY ENGAGEABLE WITH CORRESPONDING ENDS OF SAID TWO MEANS AND DISPLACEABLE INTO AND OUT OF THEIR POSITION OF ENGAGEMENT TO DEFINE A PAIR OF PARALLEL MAGNETIC CIRCUIT PATHS, EACH PATH INCLUDING SAID POWER MAGNET MEANS, AND WINDING MEANS ASSOCIATED WITH AT LEAST ONE OF SAID CIRCUIT PATHS AND ELECTRICALLY ENERGIZEABLE BY PULSES, WHEREBY A PULSE IN ONE DIRECTION ESTABLISHES A GIVEN FLUX CONFIGURATION IN SAID PAIR OF MAGNETIC CIRCUITS, AND A PULSE IN THE OPPOSITE DIRECTION PRODUCES A DIFFERENT GIVEN FLUX CONFIGURATION IN SAID PAIR OF CIRCUITS, EACH FLUX CONFIGURATION REMAINING SUBSTANTIALLY STABLE UNTIL THE NEXT OPPOSITE PULSE.