Apparatus for continuously incrementing an output member

摘要

A motion producing apparatus is disclosed for moving an element, such as a lens element, along a given path. Included in the apparatus is a linear actuator having a pair of output members. The actuator is energizable for reciprocally moving in synchronism each of said output members in mutually opposite directions. Also provided is a mechanism for alternately coupling the output members to the movable lens element so as to progressively move the lens in a given direction along the given path.