Patent ID: 8653355

Claim:
A chord-playing robot system, comprising: a computer, comprising an anti-collision program stored therein; two linear motors electrically coupled to and controlled by the computer; two moving devices respectively connected with the two linear motors, wherein the two linear motors are operable to control the position of the two moving devices, and the anti-collision program, upon execution, is operable to prevent the two moving devices from colliding with each other; and two finger-like devices electrically coupled to and controlled by the computer, wherein each of the two finger-like devices is connected with one of the two moving devices and comprises: a plurality of tubular solenoids disposed in alternating sequence in two rows, wherein each of the tubular solenoids, upon activating, is operable to create an induced electromagnetic force, wherein the computer determines whether to activate each of the tubular solenoids or not; and a plurality of electromagnetic bars, each configured to reciprocate between a first position for pressing a key on a piano in the presence of the induced electromagnetic force and a second position for releasing the key on the piano in the absence of the induced electromagnetic force, and whereby the robot system plays a chord on the piano.