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Re: That extra pad on the lower joint of some clarinets

Author: Chris P
Date: 2019-06-06 21:40

On Albert/simple systems (if fitted) and on German and Oehler systems, the double pad cups on the F/C key perform another function besides fully venting G/D.

It's called the 'patent C#' mechanism and offers the player a low register E/F# and upper register B/C# trill by playing/holding down the (LH) E/B and trilling with the (RH) F/C key.

On Boehm and reform Boehm systems it serves to fully vent G/D.

Leblanc made some soprano clarinets back in the '50s or thereabouts with the doubled pad cups on the F/C key as well as the improved throat Bb mechanism with two separate vents linked to the throat A key as on pro Leblanc basset horns, alto and bass clarinets to determine when either the throat B vent and speaker vent opened instead of the one speaker tube performing two duties as it normally does.

Former oboe finisher
Howarth of London
1998 - 2010
The opinions I express are my own.

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