Technical So, give this a think

Yes it does. with the points closed current flows in the primary winding making an electro magnet. when the points open this magnet goes away. When the magnet "goes away" the lines of flux which is the magnet collapse. these lines of flux "cut" across the wires that is the secondary, this makes voltage in the secondary.
This is just like a transformer in an AC circuit. but he AC voltage does it 60 times a second because that is the frequency that we use in the US.
But once again, I'm asking about the secondary current flow.

 

OK, lets look at it, the current is generated in the secondary winding ( in this case lets say it does not matter how it is generated) so this current goes out of the coil high tension terminal at the top. From there it goes through a spark plug wire to a spark plug. Then it jumps the gap of the plug and flows to the engine block. How does this current flow back to the secondary winding?

We have already determined The primary winding is added to the circuit to increase the output so this current would have to travel through the primary winding also. so the "other side" of the circuit is the current flowing through the primary and then to the secondary winding. BUT how does this current travel from the ground? remember above the voltage flow that came out of the coil secondary and jumped the gap went to ground. This coil assembly is not grounded, none of the coils are grounded unless the points are closed or the capacitor is shorted, and the points are open when spark occurs and if the capacitor is shorted we would never get any voltage in the secondary.
If a bird sits on a high tension wire, he does not get electrocuted because he is not grounded. there is not a complete path for current to flow.

 

I just want to thank all who have tried to explain this circuit.

 

I guess you are talking about how many amps flow through the primary when the points are closed? I would think that would that would depend on the primary wire size and how many turns of wire are in this primary.

 

Mystery solved!! so I did some more reading in my 1935 Dykes book and found the answer.
So the current flow in the secondary goes through the battery and key switch then back to the secondary winding in the ignition coil. Who would have thought?

Thanks so much for putting up with my stupid question and trying to help.

 

The pressure is required to make the spark more intense. I have a plug cleaner/tester. At zero pressure it damn near won't spark at all, intermittent at best. Raise the pressure, big blue kernel of spark. Kinda why a dead hole in a motor won't fire and foul the plug. Full disclosure, nothing to do with the current path the OP was on about, although it is where it ends up. Complicated simplicity