(under subclass 527) Coupling part wherein the means for holding or retaining the coupling part is particularly adapted to engage a retaining groove or both of a pair of parallel bars such that the coupling part may selectively be positioned at any of an infinite number of locations along the groove or bars.
SEE OR SEARCH THIS CLASS, SUBCLASS:
32+, for interrelated connectors relatively movable in straight line during use.
121+, for an electrical connector for interfitting with an uninterrupted support rail or an uninterrupted contact.
