Underlever

Incidentally, the current underlevers developed and produced after World War II are vastly improved over the prewar types, though millions of the latter are still used.

The wippen, a mechanism of underlevers, controls the jacks that push the hammers up to the strings.

The second assembly is the underlever / damper assembly which comprises all the linkage that activates the damper system, which stops the tone when the key is pressed.