Electromagnetic clutches, particularly of the automatic adjustment type

Claim 1

AN ELECTROMAGNETIC CLUTCH COMPRISING A MAGNET BODY HAVING A SOLENOID THEREIN, SETS OF FRICTIONAL RING CLUTCH DISCS SURROUNDING SAID MAGNET BODY, ONE SUCH SET BEING SLIDABLY SPLINED TO SAID MAGNET BODY, A CLUTCH HOUSING, ANOTHER OF SUCH SETS BEING SLIDABLY SPLINED TO SAID CLUTCH HOUSING, AND ARMATURE MEANS WITHIN SAID CLUTCH HOUSING, SAID ARMATURE MEANS BEING MOVABLE TOWARD SAID MAGNET BODY UPON ENERGIZATION THEREOF, SAID ARMATURE COMPRISING A FERROUS DISC, SAID DISC BEING GENERALLY OF THE DIAMETER OF SAID MAGNET BODY, WEAR COMPENSATION MEANS COMPRISING A NON-MAGNETIC RING THREADED TO SAID FERROUS DISC ON THE PERIPHERY THEREOF AND ROTATIVE WITH RESPECT THERETO AND A DISC COMPRESSION RING THREADED ON THE PERIPHERY OF SAID NON-MAGNETIC RING AND ROTATIVE WITH RESPECT THERETO, AND SAID WEAR COMPENSATION MEANS INCLUDING PAWL LOCKING MEANS CO-ACTING WITH SAID NON-MAGNETIC RING TO EFFECT AUTOMATIC LOCKING OF SAID COMPRESSION RING WITH RESPECT TO SAID FERROUS DISC TO ENSURE COMPENSATION FOR WEAR OF SAID FRICTION RINGS.