And here we are. Mind you, this is just a prototype. Then again... it seems to work!
Just a random coaster brake rear wheel, attached to the front fork of a random bicycle.
...there is some fun inside, where the axle is now all-thread, and a nut has been welded to the cone that applies the brake. There is also a tab of flat stock welded to the nut/cone, and an other scrap of flat stock welded inside the hub barrel. When the wheel turns, the tab in the hub catches on the tab on the cone, and the cone goes around with the hub -- screwing itself along the all-thread until it applies the brake.
I get about eight turns out of this one, and that should be something like 40 feet. The brake comes on a bit slowly (because the pitch of the all-thread is so short, compared with the original â€œbendix driveâ€