Carrier 1 rotates about fixed axis A and is connected by turning pairs B and C to planet gears 2 and 4. Planet gear 2 meshes with fixed sun gear 3 and planet gear 4. The speeds n₁ and n₄ of carrier 1 and gear 4 (in rpm) satisfy the condition n₄=n₁(z₄-z₃/z₄) where z₃ and z₄ are the numbers of teeth of gears 3 and 4.
$2870$CxG,PR$