Permanent inspecting device for grounded, electrically operated wheeled, self guided public transport e.g. train, has shoe pairs ensuring friction or slip on guide rail associated to whole of auto guidance by rollers rolling on rail

摘要

The device has two sets of shoe pairs ensuring friction or slip on a metal guide rail associated to a whole of auto guidance by rollers rolling on the rail. The shoes and the rail form an electric circuit containing a detector constituting a safety loop sustained/fed by a generator of low tension. The loop is traversed by a current when the contacts of setting to the ground by the shoes and guide rail are correct.