| 摘要 |
A change speed transmission comprises rotatable input and output drive assemblies which are selectively connected by friction gearing to transmit power between an engine shaft and a driven device at different speed ratios. A body of one of the assemblies defines one direct drive friction gear member and part of an epicyclic friction gear unit. The other assembly carries a shifting member which is movable between one position for engagement with the direct drive friction gear member and a second position for engaging the epicyclic gear unit to provide a speed change between the drive assemblies.
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