Rotary solenoid

Claim 1

A ROTARY SOLENOID COMPRISING, IN COMBINATION, A SHELL HAVING A BASE AT ONE END AND A CAP ANCHORED AT THE OTHER END OF THE SHELL, A THRUST PLUG MOUNTED AT THE CENTER OF SAID BASE, A CYLINDRICAL BEARING FITTED INTO AN OPENING AT THE CENTER OF SAID CAP, SAID BASE AND SAID CAP EACH CARRYING A PAIR OF POLE PIECES EXTENDING OPPOSITELY FROM SAID PLUG AND BEARING RESPECTIVELY AND BEING IN ANGULAR ALINEMENT, A SHAFT JOURNALLED IN SAID BEARING AND CARRYING A ROTOR HAVING OPPOSED PORTIONS DISPOSED BETWEEN SAID PAIRS OF POLE PIECES, A STOP EXTENDING BETWEEN TWO ANGULARLY ALINED POLE PIECES OF SAID PAIRS AT ONE EDGE THEREOF SO THAT ROTATION OF SAID ROTOR IN ONE DIRECTION AGAINST SAID STOP ANGULARLY ALINES THE OPPOSED ROTOR PORTIONS WITH SAID POLE PIECES, SAID ROTOR PORTIONS AND POLE PIECES HAVING FLAT OPPOSED SURFACES SPACED TO DEFINE SLIGHT AIR GAPS WHEN SAID ROTOR IS ROTATED IN SAID ONE DIRECTION AGAINST THE STOP, SAID OPPOSED SURFACES BEING CANTED WITH RESPECT TO SAID SHAFT SO AS TO SLOPE IN SAID DIRECTION TOWARD THE CENTRAL TRANSVERSE PLANE OF THE ROTOR, AND A COIL MOUNTED WITHIN SAID SHELL ABOUT SAID POLE PIECES AND SAID ROTOR, SAID ROTOR BEING CLOSELY SANDWICHED BETWEEN SAID THRUST PLUG AND SAID BEARING SO AS TO MINIMIZE END THRUST OF THE SHAFT AND MAINTAIN SAID AIR GAPS BETWEEN THE ROTOR AND SAID POLE PIECES.