The only way for nondelayed to work is to position a magnet anywhere you want to spot a car. If you have a long warehouse with 5 doors or spots for cars on a siding, you would need 5 nondelayed magnets to spot cars there.
Another trick I've seen written up is to mount a delayed action coupler to an upside down "L" shaped bracket with a hings at the corner. The magnet then folds down away from the track unless you want to uncouple at which time a simple pull on a cable lifts the magnet into position to uncouple.
Another trick I've seen written up is to mount a delayed action coupler to an upside down "L" shaped bracket with a hings at the corner. The magnet then folds down away from the track unless you want to uncouple at which time a simple pull on a cable lifts the magnet into position to uncouple.