Abstract: The invention is generally directed to a pipeline sphere, and more specifically a seamless pipeline sphere wherein said sphere presents a flexible, seamless outer layer surrounding an inflatable inner bladder portion which itself defines a hollow chamber. The outer layer and the inner bladder portion contain apertures which are aligned to form a channel connecting the hollow chamber to the outside environment. A weighted material may be added to the pipeline sphere, if desired.
Abstract: A sphere or pig detection switch assembly adapted for being mounted on a pipe through which the sphere or pig will run. The assembly includes an elongated, hollow main body portion presenting an elongated chamber therein. The body portion defines a detection zone positioned alongside the chamber and includes mounting structure for a detection element including a detection surface to be mounted adjacent said zone. The assembly also includes an elongated probe shaft disposed mainly within the chamber. The probe shaft includes a centrally disposed activation portion and is longitudinally moveable within the chamber from a first position with the activation portion spaced from the zone to a second position with the activation portion at the zone.