Abstract: A method and system for controlling dispensation of fluids utilizing at least one metered valve apparatus controlling a movement of fluid from at least one bulk fluid reservoir through at least one conduit in response to an authorization signal. A central controller establishes an electronic interconnection map corresponding to plumbing interconnections between at least one bulk fluid reservoir and at least one fluid conduit and employs the electronic interconnection map to generate the authorization signal. A remote communication link from the central processor to at least one metered valve apparatus facilitates transmission of the authorization signal.

Abstract: An automatic switching system particularly adapted for railroad hobbyists whereby the complicated polarity switching usually required is eliminated. Apparatus is associated with each insulation point in a track section (block) to sense the direction of train motion and automatically conform the polarity of the next track block upon which the train will enter if the next block is of an opposite polarity from the prior block section from which the train has left.