Levers

being a person who has always taken interest in music & art, i am even more fascinated by those mechanisms which help us make such things. for example, the vandercook printing press remains probably one of my favorite mechanisms ever made. also, i grew up with a piano in my household and have, for my entire life, been in love with this musical interface. in recent years i have fallen in love with the sound & size of toy pianos, and was fortunate enough to recently have one bestowed upon me as a gift. being the "take it apart" kind of guy that i am, i unscrewed the lid and flipped it over, upon which all of the keys and levers fell out. it hadn't occured to me that none of them were fixed in place or attatched to anything, but now it makes sense. so how does it work?



sure enough, each key is a lever, in fact each key is two levers, one pressed by the user, and the other (the hammer) to strike the key.

where F1 is unknown, and F2 is fixed (equal to F1)