Lionel 450 signal bridge wiring for 2 Trains

Mark...good post.  I have this signal bridge and wasn't sure how to hook it up without using 2 Lionel 153IR controllers.  Your diagram looks great.  For $35, this may be the way to go.  Does anyone else wire this differently for two-way train detection/activation?

Thanks,

Rick

Thanks Rick.  This seems pretty logical.  similar to dales excellent posts and diagrams. Perhaps a bit easier for those trying this 1st time.  

Stan...yes on shift key!  47.50 NOT 47.50.

I see Train Electrics also sells a MTR 24VAC.  I run a KW.  Would I blow up the 12?  sounds like they have great instructions and help if you call.

Here is the 1954 diagram. One replaces the contactor by using an isolated outside rail and switches the voltage with a relay as above. This method will still work if you use tubular track.

I light each signal of my bridge through a Marx two position reverse unit.

Essentially this is a single coil latching SPDT relay.  Every time it is cycled it switches to the opposite contact.

I fed the hot lead through the right finger of the reverse unit which is connected just as it came from Marx and pick up both the red and green bulb feeds through the rocker pivot contacts that would normally connect the brushes of a Marx locomotive.

I activate the reverse unit with an isolated outside rail when the train enters the signaled block and I activate it again with another third rail ground when the train leaves the block.

Two of these reverse units mounted under the table switch both 450 signal bridge light pairs.