Abstract: Improved performance and versatility of a free-reed instrument by linking a key of the instrument to a variable geometry chamber, which provides modifications in musical tones. The instrument can be an accordion or other free-reed instrument, and a passageway of the chamber is manipulated to alter the combined pitch and timbre of the tones.

Abstract: A double chambered bassboard housing for electronic M.I.D.I. accordion incorporating a folding control panel and a retractable keyboard. In a fully open position the instrument, because of its light weight and curved contour, is ideal to play and to perform with. Furthermore, all the push buttons on the folding control panel (in a fully open position) are readily identifiable because well within the view field of the accordionist. In a fully closed position the instrument becomes even more compact and therefore extremely portable for any mode of transportation.

Abstract: A slender housing for electronic M.I.D.I. accordion without bellows and without reeds. It is a fully portable musical instrument which retains two shoulder straps, a bassboard strap, and comprises two separate control panels.

Abstract: A bellows type toy tambourine with a bellows containing a space enclosed by two ring members. One of these ring members has a plurality of slots along its circumference. Each of these slots contains two round metal plates for giving metal collision sound by shaking while it is played as a tambourine. One of the ring members has a plurality of flues. Each of these flues is incorporated with a tongue so that different tunes can be given when the bellows is expanded or contracted to permit air to pass through the flues; i.e., when it is used as an accordion. It is a novel structure of toy instrument and a combination of toy drum, tambourine and accordion.

Abstract: A reed accordion having six sounds for each register and a mechanical linkage system which permits the two additional sounds to be selectively used or not in combination with the classical four sounds for each register.

Abstract: Each end box of an accordion has a plurality of keys arranged to control the operation of reeds within the end box with each reed producing a tone corresponding to a note in the chromatic scale which is dissimilar to the tones produced by the other reeds in the end box. The keys are arranged in longitudinal and transverse rows with the interval between adjacent keys in longitudinal rows being major thirds and the interval in transverse rows being minor seconds. The reeds are mounted on multi-celled reed blocks within a tone chamber defined in the interior of the end box. Air flow between the bellows of the accordion and the cells and, hence, through the reeds associated with the cells, is controlled by valve members secured to rods movable axially when the associated keys are depressed.

Abstract: A reed for a harmonica or the like has a free end portion that is adapted to vibrate and give a predetermined tone and a T-shaped mounting end portion substantially the same width as the free end portion and having a pair of laterally projecting tabs. A reed support plate is formed with a pair of transversely spaced and longitudinally extending edge portions that form with a pair of longitudinally spaced and transversely extending web portions a window having a width generally equal to the reed width. A groove is formed at one of the edge portions and opens at the substantially planar face of the mounting plate. This groove extends transversely from the window and has a groove width substantially equal to the reed width, while a substantially planar base surface of the groove is inclined away from the window to the face.