When this switch is thumb activated, it would open up a pallet (a pad that covers a tone hole, at the other end of the key button(s), (see photo) for a simple Tonic/Dominant drone: Tonic on the draw and Dominant on the press, e.g.

These reed shoes (or frames) are inserted into dovetail-shaped slots into the top side of the pan.

All these names, which the French makers gave these instruments, have the pallets on the outside, but the name "Flutina" implies an accordion with the pallets opening on the interior side of the face, just above the buttons, and the air exiting from a narrow slot in back of the protruding keyboard.

The Accordion of Cyril Demian (1829) described in his Austrian (at Vienna) patent application, had 5 pallets with 10 chords (musical triads) available.

The accordion tutor published in the Year of 1833 by Adolph Müller (Austrian National Bibliotheca) has an example[1] which includes pictures and descriptions of many different models.

Note: After Demian's 1829 patent, there is some controversy about the exact dates of further inventions, and the times of applied manufacture, of accordions.

1837, an advertisement in the musical news paper „LE MENESTREL“ of M. Reisner, selling accordions.

By 1845, There were many makers of accordions, listed in various journals: Alexandre, Fourneaux, Jaulin, Lebroux, Neveux, Kasriel, Leterme, Reisner, Busson, M. Klaneguisert.

A single scale system for these accordions was not universally adopted: Many competing "key layouts" existed.

layout link Later versions of the "Flutina" had a few open (tonic and fifth) chords available on the bass side, in addition to the silent "air" key.

In the United States of America, the more robust steel-reeded German Melodians "won out" over these brass-reeded, soft, and delicate "accordion melodiques".