LOUIS MARX & CO. AUTOMATIC SIGNAL CIRCUIT BREAKER

http://www.thortrains.net/maracc1.html

This a wiring drawing from thor's train site showing how to use the circuit breaker.

It goes in the circuit between the hot wire output of the transformer and the center rail of the track.

Newer transformers have this built-in to the transformers.

If there is a short in the track, the breaker trips and the bulb lights up the red signal light until the short is removed and the breaker reset with the red button on side.

Thank you very much for your help.

Norman