Constant speed drives

Claim 1

A ROTARY MAGNETIC CONSTANT SPEED DEVICE FOR LIGHT LOADS COMPRISING; A MAGNETIC ROTOR HAVING AN INPUT-OUTPUT AXIS OF THE DEVICE PASSING ENDWISE THROUGH IT WHICH ROTOR IS ROTATABLE ABOUT SAID AXIS AND PERMANENTLY MAGNETIZED DIAMETRICALLY WITH RESPECT TO SAID AXIS; A ROTARY HYSTERESIS RING OF MAGNETIC MATERIAL COAXIAL WITH SAID ROTOR AND SURROUNDING A FIRST AXIAL PORTION OF SAID ROTOR AT ONE END THEREOF; A VARIABLE SPEED DRIVE SHAFT COAXIAL SAID ROTOR AND CONNECTED TO ROTATE SAID HYSTERESIS RING; A STATIONARY DRAG CUP COMPRISING A PERIPHERAL CUP WALL OF ELECTRICALLY-CONDUCTING MATERIAL AND A CUP END WHICH CUP IS COAXIAL WITH SAID ROTOR AND HAS ITS CUP WALL SURROUNDING A DIFFERENT SECOND AXIAL PORTION OF SAID ROTOR EXTENDING FROM THE OPPOSITE END THEREOF, SAID CUP END BEING DISPOSED BEYOND AND ACROSS SAID OPPOSITE END OF SAID ROTOR, A STATIONARY LAMINATED RING COAXIAL WITH AND ENCIRCLING THE PERIPHERAL WALL OF SAID DRAG CUP WHICH STATIONARY RING IS COMPOSED OF A MATERIAL TO ACT AS A RETURN PATH FOR MAGNETIC FLUX; AND A CONSTANT SPEED OUTPUT SHAFT COAXIAL WITH SAID ROTOR AND CONNECTED TO THE END THEREOF REMOTE FROM SAID INPUT SHAFT AND SAID HYSTERESIS RING, WHICH OUTPUT SHAFT PASSES THROUGH AN AXIAL BORE IN SAID CUP END.