The United States of America as Represented by the Secretary of

Alan M Swett

Roderick D Swift

A cable handling mechanism for an X-ray tomographic scanner having a rotor assembly for making a scan of about two revolutions and then rewinding to an initial position includes two axially displaced drums. One drum is attached to the rotor housing and rotates with it; the other is fixed to the stationary structure. A pulley carrier between the two drums is rotatable about the same axis and carries large and small idler pulleys. At one extreme end position one or more individual cables inside a loose-fitting flexible tube are wound around the rotating drum for two turns, around the large idler pulley and in the opposite direction around the fixed drum for a single turn, and a control cable is attached to the rotating drum wound in a direction opposite to that of the flexible tube but for only one turn, around the small idler pulley and in the opposite direction on the fixed drum for two turns to which the other end of the control cable is attached.

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Milton, MA, United States of America

Alan M Swett