Synchroniser arrangements for stepped-ratio transmissions

Abstract From the Canadian patent

Abstract of the Disclosure, A synchroniser arrangement for bringing first and second rotary members of a stepped-ratio transmission (for example, a gearbox mainshaft and a constant-mesh gear that is rotatably mounted on the mainshaft) into rotary synchronism. A primary synchroniser element (for example a synchro ring) is, drivable by the first rotary member and is axially movable into frictional engagement with an intermediate element (for example a primary synchronising cone) to thereby develop at the intermediate element, by the cooperation of respective friction surfaces, a synchronising drag torque component which by the action of a pair of cooperating ramp surfaces-possibly with …