Conduit 1, also known by its systematic name BFx59H, is one of the earliest and most remarkable converters, discovered by Dave Buckingham on July 5 1996. Composed of a block and a snake, it transforms a B-heptomino into a clean Herschel with very good clearance in 59 generations, allowing easy connections to other conduits (see images below). It forms the final stage of many of the known composite conduits, including the majority of the original sixteen Herschel conduits. It is important because it was one of the key pieces in finding a method for construction of oscillators and guns of arbitrary large period (see omniperiodic).
Generation 0 with a B-heptomino
Generation 59 with a Herschel