Automatic transmission control

Claim 1

IN A POWER DRIVE, A DRIVE SHAFT FOR SUPPLYING POWER, A DRIVEN SHAFT FOR DELIVERING POWER, A PLURALITY OF ENGAGING DEVICE MEANS FOR CONNECTING BOTH SAID SHAFTS IN A POWER TRANSMITTING RELATION AND COMPRISING FINELY DIVIDED MAGNETIC MATERIAL, MEANS MOUNTED FOR ROTATION EMBEDDED IN SAID MATERIAL AND FLUX PRODUCING MEANS TO SUBJECT SAID MAGNETIC MATERIAL TO A MAGNETIC FIELD AND CAUSE IT TO GRIP SAID MEANS MOUNTED FOR ROTATION, AN ELECTRICAL CIRCUIT CONNECTED TO SAID FLUX PRODUCING MEANS AND MEANS FOR PRODUCING A VARIABLE CURRENT IN SAID CIRCUIT COMPRISING AN ELEMENT DRIVEN BY ONE OF SAID SHAFTS WHEREBY THE CURRENT IN SAID CIRCUIT AND THE EFFECTIVE MAGNETIC FLUX PRODUCED BY SAID FLUX PRODUCING MEANS ARE A FUNCTION OF THE ANGULAR VELOCITY OF SAID ONE OF SAID SHAFTS, SAID MEANS FOR CONNECTING BOTH SAID SHAFTS COMPRISING A PLURALITY OF PAIRS OF RELATIVELY MOVABLE MEMBERS HAVING AN ANNULAR SPACE THEREBETWEEN, SAID FINELY DIVIDED MAGNETIC MATERIAL BEING SUBSTANTIALLY CONFINED TO SAID ANNULAR SPACE, SAID MEANS TO VARY THE CURRENT IN SAID CIRCUIT COMPRISING AN IMPEDANCE, SAID CIRCUIT COMPRISING A DELAYED ACTION RELAY MEANS CONNECTED TO ACT IN RESPONSE TO THE VARIATION IN CURRENT PRODUCED BY SAID ELEMENT DRIVEN BY ONE OF SAID SHAFTS AND OPERATIVE IN SAID ELECTRICAL CIRCUIT TO ENERGIZE THE MAGNETIC MATERIAL BETWEEN ONE PAIR OF RELATIVELY MOVABLE MEMBERS AND TO ENERGIZE THE MAGNETIC MATERIAL BETWEEN ANOTHER PAIR.