Abstract: An articulated aerial device is provided which includes a workman's basket suspended from a movable beam. The basket is attached to the movable beam by an attaching means which selectively permits the basket to rotate for permitting easy access to an injured workman therein.

Abstract: A remote control system for a derrick, having an encoder network for producing a plurality of differing electrical control signal frequencies at one location on the derrick and a discriminator network at a second location on the derrick for identifying each electrical control signal frequency produced by the encoder network. An electro-optical converter communicates with the encoder to convert electrical control signal frequencies to analogous light signal frequencies. A light tube communicating with the electro-optical converter transfers the light signal frequencies from the electro-optical converter to an optical-electro converter that communicates with the discriminator and reconverts the light signal frequencies back to their corresponding electrical control signal frequencies. The discriminator communicates with a plurality of output networks that correspond to operating members of the derrick and directs an identified control signal frequency to the output network associated with that frequency.