Abstract: An optical metronome using sheets of music of non-sagging sheets of translucent material with notes spaced according to their value and vertically aligned measures on a display panel of light columns formed of vertical bars of triangular cross-section in white reflectors with an angular air gap and a light source for each bar. Circuitry coordinates sequential lighting of the bars in proper musical tempo and properly placed downbeat and is also attached or attachable to electronic organ circuitry or stands alone with automatic turn-off of lights to the bars if organ not counting.

Abstract: A device is provided for learning and practicing a musical beat. A foot pedal is adjustably connected by linkages and springs to actuate switches to produce one signal when the pedal is at a selected downward position and another signal when the pedal is at a selected upward position. Visual readout means located adjacent the sheet music used by a player receives the signal and flashes one kind of light adjacent the music when the pedal has reached its upbeat, and another kind of light adjacent the music when the pedal has reached its down beat. The pedal is rotatably adjustable to accommodate all methods of keeping time with the foot.

Abstract: An electronic metronome has a visual indicator consisting of a package in which a plurality of different light color LED chips are mounted close to each other. Down-beat and up-beat are indicated as different color emissions from a single spot.

Abstract: An optical metronome using sheets of music of non-sagging sheets of translucent material with notes spaced according to their value and vertically aligned measures on a display panel of light columns formed of vertical bars of triangular cross-section in white reflectors with an angular air gap and a light source for each bar. Circuitry coordinates sequential lighting of the bars in proper musical tempo and properly placed downbeat and is also attached or attachable to electronic organ circuitry or stands alone with automatic turn-off of lights to the bars if organ not counting.

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.

Abstract: An electronic metronome capable of providing subdivisions and cross rhythms in an audibly distinct manner. The metronome is comprised of solid state circitry including a linear potentiometer in a compensating network to yield an intended non-linear metronome characteristic, and can be readily contained in a small pocket size package including a battery source and loudspeaker.

Abstract: An electronic metronome with an oscillator for producing a signal of predetermined frequency and a variable divider connected to the oscillator for variably dividing the signal to a signal of lower frequency equal to that of a tempo sound to be obtained. A tempo sound generator is connected to the variable divider and is responsive thereto for generating the tempo sound to be obtained. Apparatus is provided for audibly and/or optically displaying the thusly obtained tempo sound. The electronic metronome is capable of effecting audible and visual display of a down-beat sound and medial-beat sound or any combination thereof besides the tempo sound.

Abstract: A damage-resistant mechanical-type metronome including a simplified spring driving connection to the pendulum and a simple adjustment, both of which at one and the same time minimize the likelihood of damage and also enable virtually complete elimination of "limp" or dissymmetry between the alternate half cycles. The device includes a shaft part, a pendulum part carried by the shaft part and adapted to undergo oscillating movement about the axis thereof, powered means for oscillating the shaft part, and a yieldable drive in the form of a simple, one-layer spring, connecting the pendulum and shaft parts to effect concurrent movement thereof. A pair of arms is provided, one of which is rigid with respect to the shaft part and the other of which frictionally engages the pendulum part. The arms include free extremity portions which are disposed adjacent to one another and which lie between two opposite juxtaposed ends of the spring.

Abstract: Optical metronomes with a spot or column of light shining through the sheet of music simultaneously in all staves or alternatively in all measures utilizing individual lamps, fiber optics, or lamps located in reflecting channels. Lights illuminate successively and are controlled by motor-driven perforated shields, contact arms, or an oscillator and gating circuitry.

Abstract: This music teaching device includes a cabinet having two aligned rows of lamp indicators providing coordinated visual representation of an associated aligned sheet of music. The lamps of the first row of indicators are illuminated consecutively, each lamp remaining lit for the same time period to provide a visual metronome. The lamps of the second row of indicators are illuminated in selected groups coordinated with metronome lamps each group remaining lit for the time period corresponding to the notes on the sheet music. The device includes a scanner, which provides triggering pulses producing sustained, rather than flashing illumination of individual lamps and groups of lamps; and a switching system, which ties individual lamps of the second row together for simultaneous indication.In addition to the visual indication this device provides associated audio indication, which is directly related to the visual indication.

Abstract: An optical metronome with a transparent continuous belt carrying vertical markings carried between rollers, supported between rigid transparent plates, and passing behind a translucent sheet of music through which the vertical markings are viewed. The lighting behind the belt is from horizontally extending tube type lamps and reflectors, or flat faced neon lamps which form one of said rigid transparent supporting plates with their flat faces.

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.