John: I receive your comment as a compliment. You helped me understand and remember that only a collapsing (or building) field in the primary will induce a voltage in the secondary --exactly like a transformer on AC current. The points' opening is the trigger event: my thinking was very cloudy on that point.
There is a proverb that goes something like, "Like flint to steel, so one man's mind sharpens another's."
Thanks for posting.
Jeremiah