US3886839A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical metronome
Assignee: Individual
•
Filing: 1972-03-01
•
Granted: 1975-06-03
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Expires: 1992-03-01
Abstract
Abstract A wide web is mounted on a pair of moving rollers with the web made of a transparent material being at least the width of the music sheet and having at least two vertical lines drawn the width of the web so as to pass these lines in front of the sheet of music in a timed relationship according to the speed at which the notes are to be played.
Inventors
- 👤 Castillo Juan M Del
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:29
CPC Classifications
G; G09; G09B; G09B15/00; G10; G10G; G10G1/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
108 words
An optical metronome comprising means to hold a sheet of music, a pair of spaced rollers with one of said rollers mounted on each side of said holding means, a continuous transparent web passing around and between said rollers and in front of said holding means, at least two vertical lines drawn on said transsparent web transversely of said web, means to move said rollers to move said vertical lines past said holding means in timed relation to the music on a sheet held in said holding means, and a casing enclosing the metronome having a slot positioned over said holding means to receive a sheet of music.
Claim 2
Dependent Claim
108 words
An optical metronome comprising means to hold a sheet of music, a pair of spaced rollers with one of said rollers mounted on each side of said holding means, a continuous transparent web passing around and between said rollers and in front of said holding means, at least two vertical lines drawn on said transsparent web transversely of said web, means to move said rollers to move said vertical lines past said holding means in timed relation to the music on a sheet held in said holding means, and a casing enclosing the metronome having a slot positioned over said holding means to receive a sheet of music.
Claim 3
Dependent Claim
108 words
An optical metronome comprising means to hold a sheet of music, a pair of spaced rollers with one of said rollers mounted on each side of said holding means, a continuous transparent web passing around and between said rollers and in front of said holding means, at least two vertical lines drawn on said transsparent web transversely of said web, means to move said rollers to move said vertical lines past said holding means in timed relation to the music on a sheet held in said holding means, and a casing enclosing the metronome having a slot positioned over said holding means to receive a sheet of music.
Claim 4
Dependent Claim
108 words
An optical metronome comprising means to hold a sheet of music, a pair of spaced rollers with one of said rollers mounted on each side of said holding means, a continuous transparent web passing around and between said rollers and in front of said holding means, at least two vertical lines drawn on said transsparent web transversely of said web, means to move said rollers to move said vertical lines past said holding means in timed relation to the music on a sheet held in said holding means, and a casing enclosing the metronome having a slot positioned over said holding means to receive a sheet of music.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-02 | 1978-12-02 | 1979-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-02 | 1982-12-02 | 1983-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-02 | 1986-12-02 | 1987-06-03 | $7700.00 | Window Closed / Lapsed |