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US 4,070,944 AGranted
Optical metronome
OwnerJuan M. del Castilloinventor
Life of this patent
Estimating the term…
Abstract
An optical lighted metronome has a column of light projected onto a sheet of music by means of individual lamps passing light through lenses with the lights connected to illuminate successively by means of motor-driven contact arms or electronic circuitry.
Claims7
An optical metronome for visually indicating the note to be played and the duration of the note on a sheet of music having at least two parallel staves comprising
- means for supporting a sheet of music,
- a housing along an edge of said supporting means in front of a sheet of music and parallel to the staves, and extending at least the length of a staff on the sheet of music,
- and means in said housing to project a series of vertical columns of light successively across the staves on the front of the sheet of music in timed relation to the tempo of the music being played from the sheet of music and spaced at the smallest note time interval with the notes on the sheet of music spaced at intervals related to the duration of each note.
Dependencies are inferred from the claim text.