Air-cooled eddy-current coupling and brake

Claim 1

IN AN ELECTROMAGNETIC EDDY-CURRENT COUPLING, IN COMBINATION, A FIRST AND A SECOND SHAFT, AN INNER ARMATURE ROTATABLE WITH SAID FIRST SHAFT, A CRENELLATED OUTER ARMATURE ROTATABLE WITH SAID SECOND SHAFT AND CONCENTRICALLY SURROUNDING SAID INNER ARMATURE, A STATOR SURROUNDING SAID ARMATURES AND PROVIDED WITH AIR-CIRCULATION APERTURES, A GENERATOR OF MAGNETIC FLUX ON SAID STATOR, DRIVE MEANS FOR ROTATING SAID INNER ARMATURE BY IMPARTING ROTATION TO SAID OUTER ARMATURE, SAID INNER ARMATURE HAVING AN ANNULAR PERIPHERAL PORTION PERMEABLE TO SAID FLUX AND SUPPORTING MEANS FOR SAID PERIPHERAL PORTION SECURED TO SAID FIRST SHAFT, SAID SUPPORTING MEANS BEING PROVIDED WITH AXIALLY EXTENDING AIR PASSAGES, FIRST CENTRIFUGAL FAN MEANS SUPPORTED BY SAID FIRST SHAFT WITHIN SAID STATOR AND ALONGSIDE SAID PERIPHERAL PORTION FOR ROTATION IN UNISON WITH SAID INNER ARMATURE, SAID FAN MEANS UPON SUCH ROTATION CREATING A STREAM OF COOLING AIR TRAVERSING SAID APERTURES AND SAID PASSAGE AND SECOND CENTRIFUGAL FAN MEANS ON SAID SECOND SHAFT PROJECTING AXIALLY BEYOND SAID OUTER ARMATURE AT A LOCATION REMOTE FROM SAID FIRST FAN MEANS AND RADIALLY OFFSET FROM SAID PASSAGES FOR AGITATING SAID STREAM OF COOLING AIR.