Two bevel sun gears of equal diameter, 3 and 5, are keyed to axle shafts B and A and mesh with bevel planet gears 4 which rotate freely on studs c of the carrier, designed as housing 1. Housing 1 rotates about axle shafts A and B. The speeds n₃, n₅ and n₁ of gears 3 and 5, and housing 1 (in rpm) are related by the equation „n₁=(n₃+n₅)/2. The mechanism has interlocking toothed clutch 2 which slides along axle shaft A on a key and can be shifted into engagement with clutch member 6, designed as an internal gear and rigidly attached to housing 1. When interlocking clutch 2 is disengaged, axle shafts A and B rotate at different speeds depending upon the resistance torque applied to them. If clutch 2 is engaged, axle shafts A and B rotate at a speed equal to that of housing 1.
$2917$CxG,DR$