key (1)
key rocker (or bottom), with screws for height adjustment (2)
jack (3)
regulating button (4)
hammer flange (5)
hammer bushing adjusting screw (6)
hammer butt (7)
hammer head (8)
backcheck (9)
damper lifter wire with regulating buttons (10)
damper lever (11)
damper lever flange rail (lift rail) (12)
damper head (13)
Source of parts names, Oliver C. Faust The Piano Tuner's Pocket Companion, for Use of Pupils of the Faust School. Compiled From the Lectures of Oliver C. Faust. New York: C. N. Potter, 1899. (reprint) p.74
{{Information |Description=Single action sometimes called "French action" from Chickering square piano |Source=self-made |Date=6 June, 2007 |Author= Mireut }}