Device for string instruments

Device for string instruments with lengthwise tensioned strings above a fingerboard, where the strings are intended to be set in oscillation for tone generation and where the length of the strings' oscillating part is variable for the variation of the pitch by pressing the string against selectable positions on the fingerboard, the strings running across a nut mounted across an upper end of the fingerboard, said nut including several nut parts arranged side-by-side across the width of the fingerboard and individually movable along the lengthwise direction of the fingerboard, characterized in that a swaying bridge is mounted at the string attachment adjacent for the instrument bridge, said swaying bridge comprising a holder disposed in the body of the instrument in which a rotatable shaft is provided and through which threaded screws are running, the length of said screws exceeding the diameter of the shaft to thus project a certain distance outside the shaft and in that the strings are intended to be attached to the end portion of the projecting parts of the screws to make pitch changes possible by the turning of the shaft in that a rotational mechanism is connected to the rotatable shaft, said rotational mechanism being manoeuvrable by a tunable swaying arm disposed at the front side of the body of the instrument for turning the shaft, and in that said swaying and is able to be locked in predetermined turning positions, the distance between the lockable turning positions corresponding to a predefined change of the instrument's pitch.