[Stephen]

Ofir,
I would have to take out my printed paper versions of the Clavietta and Accordina patents by Borel, to compare the figures. In one of the designs of the accordina (there were some adaptations to the patent), Borel explains in the accordina patent (it is in one of the figures, as numbers 13 (= wind chamber) and 14 (= baffle) ) he made a partition or division in the wind chamber with a sort of baffle (an extra plate inside the wind chamber). His purpose was to keep as much moisture as possible away form the valves and reeds. Most of the water stays in the 1ste compartment of the wind chamber, and is blown out using the air release button. The says very few “spittle” is reaching the valves or reeds, the opposite as a mouth harmonica or melodica where all the moisture and condensation is aimed more directly on the reeds and valves. He tried to avoid this.
I have to say in my accordina, this succeeded very well, and there is no negative effect on reed response. Even with the faintest air pressure, I have good reed response in my accordina.

I never had a Clavietta, and it is possible the Clavietta never had this “partition” in the wind chamber, or maybe some models did have it.