Railway line frog, between rails, has tongue and groove supports to set the gaps between the frog point and the rails

摘要

The railway line frog, between rails (2,3), has at least one support (9,11) to set the gaps (5,6) between the frog point (4) and the rails with a tongue and groove joint holding them together. Grooves (17,18) are in the side flanks (15,16) of the frog point to take the support tongues (19,20), with an electrical insulation between them.