An apparatus for transferring carriers from a first power line to a second power line through a power line discontinuous section. Each carrier has a dog engageable with each of the pivotable pushers on each of the power lines and a pusher raising cam having a dog receiving recess at its rear portion. The pusher includes a downward portion and a laterally extending horizontal portion at the lower end of the downward portion, the horizontal portion being formed with an upper pushing face and a lower pushing face on its front side and having a cavity in its bottom at the middle of the length thereof. The cam has a front lower portion, a rear higher portion having its top positioned at the same level as the top of the dog and a projection on the top of the front lower portion. The free line has a carrier standby section coextensive with the first power line near the discontinuous section and longer than the carrier. The standby section is laterally displaced from immediately below the first power line within a range permitting the horizontal portion of a pusher advancing from behind a carried at rest in the standby section to engage the projection of the cam on the carrier upon disengagement from the dog on the following carrier to transfer the standby carrier to the discontinuous section, after allowing the follower to stop in lapping relation to the preceding carrier.