(under subclass 14.05) Electrical connections including a dowel pin, key, or similar element inserted in aligned holes of sockets formed in the abutting ends of the rails.
(1) Note. For mere mechanical rail-joints employing similar elements, see this class, subclass 179.
(2) Note. For mere rod joints or couplings employing similar elements, see Class 403, Joints and Connections, subclasses 292+.
