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US 3,942,404 AGranted
Optical metronome with transparent sheet music
OwnerJuan M. del Castilloinventor
Life of this patent
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Abstract
An optical metronome having a belt moved at a speed set for the music with vertical lines on the belt passing behind a transparent sheet with musical notations thereon in timed relationship according to the speed at which the notes are to be played.
Claims5
An optical type of metronome comprising
- a transparent music sheet with musical composition thereon,
- a pair of rollers mounted in spaced relation to each other,
- a continuous web passing around and between said rollers and positiond behind said transparent sheet,
- at least two vertical lines drawn on said web transversely of said web,
- means to drive said rollers to move said vertical lines past and behind said transparent sheet in timed relation to the musical composition on said transparent sheet,
- supporting means for said transparent sheet including
- transparent rigid support sheets positioned in front of and behind said transparent music sheet.
4 more elements
Dependencies are inferred from the claim text.