Klarinet Archive - Posting 000639.txt from 2000/02

From: "Brent Eresman" <beresman@-----.net>
Subj: [kl] Alternate throat Bb key (was Signature and series 10)
Date: Wed, 16 Feb 2000 19:10:56 -0500

On: Tue, 15 Feb 2000 09:05:06 -0700
Richard Bush wrote

>I know of three different mechanisms that attempted to resolve the
Bb/register key compromise.
>
>They are:
>
<snip>
>
>3) The Stubbins-Kasper (S-K) mechanism that Leblanc offered for a short
period on both their French instruments and >even on a plastic bodied Vito
or Normandy, was a different kind of key work. This mechanism used a second
vent hole
>below the register key that would open along with the register key to
supplement the venting for the Bb and clarify its tone. >An arm that
overrode the linkage between thumb ring and first finger ring canceled out
and closed the
>second or auxiliary Bb tone hole when the thumb closed the ring for notes
in the second register.

I have a LeBlanc Bb clarinet from the early part of the century which has a
mechanism something like this. I'm not sure exactly how old it is; it was
used in the Navy during WWII, though, and i suspect it is much older than
that. This instrument has an arm activated by the throat "A" key which
closes the register vent and opens a hole about 1-1/2" lower. Is this the
same mechanism of which you speak?

Brent Eresman

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