OK, gang, I here's what I've found out. I checked a bunch of books including the Benchley, Haynes (two editions), Moss US and Europe, and three restoration books. And none of them were particularly conclusive. The 30 year old Haynes was the best as it has a better quality photo that what you get today in their books, and it looked like the setup in my photos that I posted earlier. But I can't copy that photo right. So I checked my car. Here's what's up on that-
In that photo you can see one of the short springs at about the 7:00 position in the photo where it connects to an arm assembly that rides on the throttle shaft. However, the arm-thing pivots on the shaft. You can see a fork-like affair that is associated with the arm rig. The shaft to the right-most in the photo is the choke shaft. There is a spiral spring on that shaft that causes it to return to the normal position. You can just make it out at about the 2:00 position in the photo. It is a tiny bit blurry because the camera didn't quite focus on it. That's why you can't see the spiral winding.
That's all I know.