Self-energization spot type brake systems

Claim 1

A DISC BRAKE MECHANISM FOR USE WITH A DISC FIXED TO ROTATABLE STRUCTURE TO BE BRAKED, SAID DISC BRAKE MECHANISM COMPRISING A HOUSING ADAPTED TO BE FIXED TO STRUCTURE ADAPTED TO RESIST ROTATION OF SAID DISC WITH SAID HOUSING POSITIONED ADJACENT BUT SPACED FROM THE DISC, SAID HOUSING HAVING A CYLINDER THEREIN COMPRISING A CYLINDRICAL BORE ORIENTED WITH ITS AXIS PARALLEL TO AND OFFSET FROM THE AXIS OF ROTATION OF THE DISC BETWEEN SAID DISC AXIS AND THE PERIPHERY OF THE DISC, A PISTON MOUNTED IN SAID CYLINDER BORE FOR RECIPROCABLE MOVEMENT ALONG AND ROTATIONAL MOVEMENT ABOUT THE AXIS OF SAID CYLINDER, SAID PISTON HAVING ONE END PROJECTING FROM SAID CYLINDER TOWARD THE DISC, FRICTION MEANS ON SAID ONE END OF SAID PISTON ADAPTED FOR FACE-TO-FACE FRICTIONAL CONTACT WITH SAID DISC AND ADAPTED TO DEVELOP A RESULTANT FRICTIONAL FORCE WHEN IN SAID CONTACT TENDING TO ROTATE SAID PISTON ABOUT SAID CYLINDER AXIS, MEANS FOR MOVING SAID PISTON AXIALLY OF SAID CYLINDER FOR URGING SAID FRICTION MEANS INTO SAID FRICTIONAL CONTACT WITH THE DISC AND CAM MEANS ON SAID PISTON AND HOUSING COOPERABLE IN RESPONSE TO SAID FRICTIONALLY INDUCED ROTATION OF SAID PISTON TO DEVELOP AN AXIAL COMPONENT OF FORCE ON SAID PISTON URGING THE SAME TOWARD THE DISC.