Is this the one you're asking about?

tbone!

Thanks, man! I'm not sure if that is the same or similar mechanism as was on the Strupe or not. From the fuzzy pictures of a Master Tension drum that I have, the rims and lugs are definitely different than what is in your photo.

I am (somewhat) trying to compile a list of drums that utilized some kind of tensioning system that was other than the conventional designs we know today.

You're welcome. This was a WW2 WFL drum & the tensioning system was definitely developed by Strupe, I had to research it cause it was going into Classic Drummer Magazine. The 'lugs' on this drum are stationary & screwed to the shell & hold the rims stationary, too. The bearing edge hoop is what moves, providing the tightness of the heads, due to the expanding of the ribs.

There may be other Strupe systems, I wouldn't know.

Hey O-lugs visit the Google Patents and type in Strupe.

Also try and type in a few variants of the name and or search by the patent holder name.

Click Here

David