Luminaire lowering device

摘要

Lowering and hoisting apparatus for high mast luminaires. Luminaire support ring is mounted for movement along a hollow pole by a plurality of hoist cables secured at one end to a transition plate which is located inside the pole and to which is also attached a winch cable operated by a winch at the base of the pole for raising and lowering the support ring. Both the hoist cables and the winch cable are secured to the transition plate by freely rotatable ball bearing devices to prevent the cables from twisting and tangling during the raising and lowering operations.