Abstract: A wind controller is disclosed which provides glitch-free playing of the instrument by using key position sensors which produce tristate logic signals indicating released, held, or transition positions of each key. Logic circuitry processes the key position signals and prevents any note from sounding when any of the keys is in transition between the released and held positions. The controller also allows the player to select alternate fingering charts which avoid “mine field” fingerings and which are created and downloaded to the wind controller using a personal computer. A set of chord keys and a computer program allows the player to register, without sounding, a series of notes to make up a chord using a registration key and an enable/disable key which alternately activates the last registered chord for playing or deactivates it to return to monophonic mode. Another registration key is provided to register another chord whereby an endless progression of chords can be played in succession.

Abstract: An automatic speed range shifter for bicycles is disclosed which produces a downshift when a predetermined pedal force is exceeded and which produces an upshift when a predetermined pedal rotational speed is exceeded. A pedal force sensor comprises a strain gage element on an arm supporting an idler sprocket for the chain. A pedal rotational speed sensor comprises a magnet/coil coacting with the pedal crank. A microcomputer receives inputs from the force and speed sensors and produces control signals for the automatic shifter. The automatic shifter comprises a front shifter actuator including a reversible electrical servo motor which is coupled by a cable with the front derailleur. It also comprises a rear shifter actuator with a reversible servo motor which is coupled by a cable with the rear derailleur.

Abstract: An automatic speed range shifter for bicycles is disclosed which produces a downshift when a predetermined pedal force is exceeded and which produces an upshift when a predetermined pedal rotational speed is exceeded. A pedal force sensor includes a strain gage element on an arm supporting an idler sprocket for the chain. A pedal rotational speed sensor includes a magnet/coil coacting with the pedal crank. A microcomputer receives inputs from the force and speed sensors and produces control signals for the automatic shifter. The automatic shifter includes a front shifter actuator including a reversible electrical servo motor which is coupled by a cable with the front derailleur. It also includes a rear shifter actuator with a reversible servo motor which is coupled by a cable with the rear derailleur.