Clutch for electric motors

Claim 1

FOR TRANSMITTING POWER FROM A SHAFT PROJECTING FORM THE END OF A MOTOR CASING, THE COMBINATION OF, A GENERALLY CUP-SHAPED END BELL COMPOSED AT LEAST IN PART OF A MAGNETIC MATERIAL AND ADAPTED FOR ATTACHMENT TO SAID MOTOR CASING CONCENTRIC WITH THE AXIS OF SAID SHAFT, A SECOND SHAFT PROJECTING AXIALLY THROUGH AND JOURNALED INTERMEDIATE ITS ENDS IN THE CLOSED END OF SAID END BELL WITH THE INNER END ALINED WITH AND DISPOSED ADJACENT THE OUTER END OF THE MOTOR SHAFT, A MAGNETIC DISK DISPOSED WITHIN SAID SUBSTANTIALLY SMALLER IN A DIAMETER THAN SAID END BELL FAST ON THE INNER END OF SASID SECOND SHAFT AND PROVIDING A DRIVEN FACE FACING AXIALLY TOWARD THE MOTOR SHAFT, A FLYWHEEL SUBSTANTIALLY LARGER THAN SAID DRIVEN DISK ADAPTED TO BE SECURED TO AND MOTOR SHAFT AND PROVIDING A DRIVING CLUTCH FACE ENGAGEABLE AND COOPERATING WITH SAID DRIVEN FACE TO FORM A FRICTION CLUTCH, SAID FLYWHEEL POSSESSING INERTIA SEVERAL TIMES THAT OF THE COMBINED INERTIA OF SAID DRIVEN DISK AND SECOND SHAFT AND HAVING A PORTION ADJACENT SAID DRIVEN DISK COMPOSED AND MAGNETIC MATERIAL AND COOPERATING WITH DISK AND SAID END BELL TO FORM A MAGNETIC FLUX CIRCUIT OF TOROIDAL SHAPE HAVING PARTS EXTENDING SUCCESSIVELY ALONG SAID SHAFTS BETWEEN SAID DRIVEN DISK AND SAID FLYWHEEL, THROUGH THE FLYWHEEL, THROUGH A NARROW AIR GAP BETWEEN OPPOSED SURFACES OF THE FLYWHEEL AND SAID END BELL, AND AN ANNULAR MULTIPLE TURN WINDING STATIONARILY MOUNTED ON SAID END BELL AND DISPOSED WITHIN SAID TOROIDAL FLUX PATH.