Image Number 3 for United States Patent #4655257.
A guide tube assembly for an industrial endoscope comprises a multiplicity of tube segments arranged to form therein a long guide bore. A hand actuator is connected to a proximal one of the tube segments. At least one pair of elongated members have their respective one ends fixedly secured to a distal one of the tube segments, and extend through communication bores formed in the remaining tube segments to the hand actuator. A resilient member is mounted on the hand actuator for resiliently pulling the elongated members to bias the tube segments so as to bring them into contact with each other.