Spool carrieers

Claim 1

A CARRIER FOR HOLDING IN DRIVING ENGAGEMENT A SPOOL OF THE KIND HAVING AT LEAST ONE RECESS IN A BUSH PORTION FOR ENGAGING A DOG ON A DRIVING MEMBER COMPRISING A HUB PORTION WITH A DOG OR DOGS FOR ENGAGING SAID RECESS WHEREBY SAID HUB PORTION AND DOG CONSTITUTE SAID DRIVING MEMBER, A LOCKING ELEMENT CARRIED ON SAID HUB PORTION FOR AXIAL AND ROTATIONAL MOVEMENT ABOUT THE HUB AXIS AND HAVING AT LEAST ONE RADIALLY EXTENDING EAR POSITIONED SO THAT THE SPOOL CAN PASS OVER THE LOCKING ELEMENT WHEN THE EAR IS ALIGNED WITH THE CORRESPONDING DOG BUT, BY ROTATION OF THE LOCKING MEMBER, THE EAR CAN BE TURNED TO A POSITION ADJACENT THE SIDE OF THE SPOOL, SPRING MEANS URGING THE LOCKING ELEMENT AXIALLY TO MOVE THE LOCKING ELEMENT TOWARDS THE DRIVING MEMBER AND CAM MEANS ARRANGED TO EFFECT AXIAL MOVEMENT OF THE LOCKING ELEMENT AS IT IS ROTATED, SAID CAM MEANS BEING SHAPED SO THAT THE LOCKING ELEMENT IS MOVED AXIALLY AWAY FROM THE DRIVING MEMBER AGAINST THE SPRING FORCE AS THE LOCKING ELEMENT IS ROTATED FROM A POSITION IN WHIC THE LOCKING ELEMENTS CLAMPS THE SPOOL ON THE DRIVING MEMBER TO A RELEASE POSITION WHERE THE LOCKING ELEMENT EAR OR EACH EAR IS ALIGNED WITH SAID DOG OR EACH DOG FOR RELEASING THE SPOOL, THE CAM MEANS BEING ARRANGED FURTHERMORE SO THAT, IN THE LOCKING POSITION THE AFOREMENTIONED SPRING MEANS URGE THE LOCKING ELEMENT TIGHTLY AROUND THE SPOOL.