Designed by
Title
Mechanical railway signalling - signal levers #135874191
Description
An old MechanicalÃÂ railway signallingÃÂ installations rely onÃÂ lever framesÃÂ for their operation to interlock theÃÂ signals, track locks[1]ÃÂ andÃÂ pointsÃÂ to allow the safe operation of trains in the area the signals control.