Driving gear 1 is keyed to shaft f, rotates about fixed axis A-A and meshes with planet gear 2 which is integral with planet gear 3. Gear 3 has a single tooth a which engages tooth spaces b of fixed internal gear 5. Gear 3 has concentric locking surface c which engages concave locking surfaces d of gear 5. Planet gears 2 and 3 are connected by a turning pair to carrier 4 which rotates about axis A-A. Carrier 4 rotates only during the periods when tooth a of gear 3 engages a tooth space b of gear 5. When the tooth leaves the tooth space and surface c of gear 3 engages surface d of gear 5, carrier 4 has a dwell. The number of dwells per revolution of carrier 4 is equal to the number of tooth spaces b in gear 5.
$2894$CxG,PR$