What he said!
From what I can tell, the LGB 12070 supplementary switch is simply a lever microswitch. So as Oman shows the logical "AND" function is effected by placing the 12070 in-series with the insulated rail trigger signal. In other words, it requires the combination the insulated rail trigger AND the LGB switch being in the undesired position to fire the switch to the opposite position. If the switch is already in the correct position, then nothing happens.
So you should be able to wire this up today...no comparator required.
The only issue I see is as follows. When the solenoid fires to drive the switch to the opposite position (whether diverge -> straight or straight -> diverge) at some point in the motion, the 12070 will flip its position and power will no longer go to the solenoid. The question is whether there is enough "momentum" to carry the mechanism to the opposite setting. You'd think the designers would have accounted for this but who knows! In any case you can check it out with what you have today and let us know for the record.
If the 12070 releases too quickly, the switch mechanism does not firmly snap over to the opposite position, then we're back to the timer mechanism so that power is applied for some minimum duration (e.g., 1/2 sec).
