Coil for vehicle guidance control system - metal conductive safety windings have insulation between turns

摘要

A coil designed for use in a signal emission system for controlling the direction of a vehicle travelling along a path in which conductive wires are buried, with a set of windings enclosing a ferrite core, and with a metallic protective winding, which in the event of a breakage in the current carrying windings, will cause an inductive short circuit as a safety measure, as in the main patent has each turn of the protective winding (3) insulated from its adjacent windings, these windings overlapping each other. An insulation layer (7) is included between these outer protective windings (5) and the innermost conductive windings (2).