Synchronization arrangement for change-speed transmissions

Claim 1

A SYNCHRONIZATION INSTALLATION FOR CHANGE-SPEED TRANSMISSIONS, ESPECIALLY FOR MOTOR VEHICLES, COMPRISING: SHIFTING SLEEVE MEANS HAVING WORKING SURFACE MEANS, COUPLING BODY MEANS ADAPTED TO BE COUPLED FOR ROTA-/ TION IN UNISON WITH SAID SHIFTING SLEEVE MEANS, AND SYNCHRONIZATION MEANS FOR EFFECTING SYNCHRONISM BETWEEN SAID CHIFTING SLEEVE MEANS AND SAID COUPLING BODY MEANS DURING ENGAGEMENT OF A SPEED IN THE CHANGE-SPEED TRANSMISSION INCLUDING SLOTTED SPRINGY SYNCHRONIZING RING MEANS RETAINED UNDER INITIAL STRESS IN SAID COUPLING BODY MEANS AND HAVING AT LEAST ONE FRICTION SURFACE ADAPTED TO ENGAGE WITH SAID WORKING SURFACE MEANS AND AT LEAST ONE CENTERING SURFACE ADAPTED TO ENGAGE WITH SAID COUPLING BODY MEANS, SAID SYNCHRONIZING RING MEANS BEING OF SUBSTANTIALLY THE SAME CROSS SECTION OVER THE ENTIRE CIRCUMFERENCE THEREOF AND BEING OF OVAL SHAPE IN THE UNSTRESSED CONDITION THEREOF WITH THE LARGEST DIMENSION EXTENDING IN AN AXIAL PLANE WHICH IS DISPOSED SUBSTANTIALLY PERPENDICULARLY TO AN AXIAL PLANE BETWEEN THE ENDS OF THE SYNCHRONIZING RING MEANS, SO THAT THE SYNCHRONIZING RING MEANS ASSUMES A SUBSTANTIALLY CYLINDRICAL SHAPE DURING SYNCHRONIZATION OPERATION OF THE INSTALLATION.