Author: kdk ★2017
Date: 2014-11-20 22:51
I just tried to take a couple of pictures, but they came out very blurred because of the close distance I tried to use. I have to go back and figure out how to use the Macro mode on my camera.
I was, it turns out, wrong about how the mechanism works. It's a C clarinet that I only use occasionally, so I forget from one use to the next how the thing is put together, only remembering that it accomplishes its task quite nicely.
The linkage opens and closes an extra tone hole, smaller than and just beneath the Bb trill tone hole. When you finger thumb+A, the register key stays open and the extra vent opens as well, giving you an additive effect of the two vents. The extra vent is held closed by the linkage when the A key isn't open. The result is a clear-sounding, in tune Bb. There is a regulating screw on the rocker end of the extra key, which looks like it allows adjustment of its clearance height. I imagine the major downside of this assembly is that I'm not sure a standard pad would fit - it looks slightly smaller than the pad on the register key. My instrument has what looks (without unmounting the key to look closely) like cork, which could easily enough be shaped to fit.
Once I figure out the camera, I'll try to post a couple of photos of it.
Karl
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The Clarinet BBoard
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