Rotary solenoid having a rectangular stator member

Claim 1

AN ELECTROMAGNETIC ACTUATOR COMPRISING AN ELONGATE STATOR OF MAGNETIC MATERIAL, SAID STATOR HAVING A SUBSTANTIALLY SQUARE CROSS SECTION, A LONGITUDINALLY EXTENDING CYLINDRICAL BORE IN SAID STATOR, A SHAFT OF MAGNETIC MATERIAL ROTATABLY MOUNTED IN SAID STATOR CONCENTRICALLY OF SAID BORE, AN ARMATURE OF MAGNETIC MATERIAL ON SAID SHAFT, SAID ARMATURE EXTENDING WITHIN SAID BORE AND ADJACENT ONE END OF SAID STATOR, A COIL IN SAID BORE INTERMEDIATE SAID ARMATURE AND THE OPPOSITE END OF SAID STATOR, TWO DIAMETRICALLY OPPOSITE CORNERS OF SAID STATOR ADJACENT SAID ARMATURE BEING REMOVED WHEREBY TO FORM TWO DIAMETRICALLY OPPOSITE MAGNETIC POLE PIECES ADJACENT SAID ARMATURE IN THE REMAINING TWO CORNERS OF SAID STATOR, SAID POLE PIECES COOPERATING WITH SAID ARMATURE WHEREBY MAGNETIC FLUX INDUCED IN SAID STATOR, SAID SHAFT AND SAID ARMATURE BY SAID COIL WILL TEND TO ROTATE SAID ARMATURE FROM A POSITION GENERALLY OUT OF ALIGNMENT WITH SAID POLE PIECES TO A POSITION GENERALLY IN ALIGNMENT WITH SAID POLE PIECES, THE CORNERS OF EACH SAID POLE PIECE AND SAID ARMATURE WHICH ARE ADJACENT EACH OTHER WHEN SAID ARMATURE IS IN SAID FIRST MENTIONED POSITION, DIVERGING FROM EACH OTHER AT APPROXIMATELY 45 DEGREES.