Abstract: Modular wall panel structure comprising panels having a supporting skeleton of stiles, rails, and mullions of substantially uniform hollow rectangular section and wherein each vertical margin of a panel includes two spaced stiles and wherein each panel includes two spaced bottom rails as well as a top rail and two spaced mullions extending vertically from the top rail to an uppermost bottom rail.

Abstract: Modular privacy screen assemblies having one or more panels and vertical consolidating or joining members of channel formation mated to the panels by side openings or slots on the panels extending outwardly and downwardly and engaging upwardly and outwardly extending supporting surfaces on said consolidating or joining members.

Abstract: Multiple station modular office furniture including a primary table top partitioned to be shared privately by four users and coordinated with two lateral table tops partitioned to be shared by said four users so that each user has a primary table portion and a lateral table portion, vertical panels assembled with said tops utilizing slots in said panels and tops to provide a balanced, stable, strong structure.

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: Operation of a pushbutton or key mechanism by the operation of a single pushbutton or key through circuitry which may include fiber optics signals all keys on the keyboard included in the particular chord. The device may be built in or simply attached to the keyboard instrument. The keys are spring, and string or wire operated to return a key to its inoperative position when the next key is pressed down.

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: Operation of a pushbutton or key mechanism by the operation of a single pushbutton or key through circuitry which may include fiber optics signals all keys on the keyboard included in the particular chord. The device may be built in or simply attached to the keyboard instrument. The keys are spring, and string or wire operated to return a key to its inoperative position when the next key is pressed down.

Abstract: A teaching device for use with an organ, supported on the upper keyboard, with timed motor means to move an apertured record sheet between a light source and fiber optic connectors which transmit light signals to the fiber optic ends located over keys of the lower chord keyboard and through a sideways extending housing to fiber optic ends located over the keys of the upper melody keyboard in accordance with the placement of the apertures on the moving record sheet.

Abstract: Apparatus for exerting pressure on several strings of a stringed instrument simultaneously by operation of a pushbutton which transmits either hydraulically or pneumatically or by flexible cable the touch from a single finger, hence a single pushbutton, to several strings of a stringed instrument for such purposes as the playing of a chord.

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: 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.