Schwinn front expander brake?

[straitbar]

There was a heavy-duty high-low flange unit, which had the lever pulled up by a cable running down in front of the right fork. The tall flange on those was riveted-on. Later came a smaller unit that was also high-low flanged (unriveted), but was pulled by a cable from behind the right fork. It has Schwinn script and patent pending stamped on the hub.
What year was that smaller high-low expander brake introduced?
Thanks

 

[35cycleplane]

late '39,introduced w/the high flange,like the phantom,for the '40 model year. should have"patent pending",and schwinn,in script,to be a '40/'41,only. keith at cycleplanes"r"us

 

[straitbar]

expander brake

Thanks Keith...
So this brake should be attached to a late prewar rim. Would that be a flat-style Lobdell rim or what?
It's currently attached to a decent later dbl-knurl S2. Anyone with a good profile picture of the appropriate rim? Thanks

 

[ballooman]

my two cents

Hi . As far as I have read and seen this could have been on the lobdells or the drop center rims depending what Schwinn put on the bike at the time