Other constructions of tongues, e.g. tilting about an axis parallel to the rail, movable tongue blocks or rails

Full Title

Switches; Crossings > Tongues; Associated constructions > Other constructions of tongues, e.g. tilting about an axis parallel to the rail, movable tongue blocks or rails

Classification Context

Section:

FIXED CONSTRUCTIONS

Class:

CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES

Subclass:

PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS