Abstract: A string vibration sustaining device according to the present embodiment includes a rear pickup converting string vibration into an electrical signal, an amplifier amplifying the converted electrical signal, and an ultrathin electromagnetic driver converting the amplified electrical signal into a magnetic signal to excite strings. The ultrathin electromagnetic driver includes two magnetic pole plates formed of a magnetic material, a rare earth magnet arranged in parallel with the strings between the two magnetic pole plates, and a coil wound in a direction perpendicular to the strings around the rare earth magnet, is formed to be ultrathin to have an entire thickness equal to or smaller than 3 mm, and is arranged in a slight gap between a neck end portion and a front pickup of the electric guitar.

Abstract: A stringed instrument having a device for sustaining the vibration of a string; the stringed instrument being a musical instrument having plural strings with the mass and tension of each string being different, which has a pickup unit for detecting the vibration of a string, an amplifying unit for amplifying an electric signal detected by the pickup unit, an electromagnetic driver for emitting magnetic energy to drive a string by a driving signal output from the amplifying unit, and an excitation balance matching unit for providing well-balanced excitation to each of the plural strings and/or a magnetic flux emission controlling unit for increasing the quantity of magnetic flux emission in the direction of a string.

Abstract: An electromagnetic pickup for an electric stringed instrument has, two parallel permeability plates placed perpendicular to strings; a permanent magnet provided between the two permeability plates in parallel to strings; and a coil wound around the permanent magnet. The plate permanent magnet is in contact with the permeability plates in such a manner that the portions of the permanent magnet that contact the permeability plates have oppsite polarities.

Abstract: An electric stringed instrument comprises an electromagnetic pickup having a permanent magnet and a string signal detecting coil wound around the permanent magnet and magnetically combined with the permanent magnet, an electromagnetic force producing unit having a driving coil to produce a magnetic force and being placed in the neighborhood of the electromagnetic pickup, and an adjusting unit provided with a part of a current flowing in the driving coil of the electromagnetic force producing unit and disposed at a place magnetically combined with the string signal detecting coil of the electromagnetic pickup. One induced electromotive force caused by magnetic flux from the adjusting unit and another induced electromotive force caused by magnetic flux from the electromagnetic force producing unit negate each other in the string signal detecting coil.

Abstract: An electric stringed instrument having a device for sustaining the vibration of the string including an electromagnetic pickup for converting the vibration of the string to an electric signal, an amplifying device for amplifying the electric signal, and an electromagnetic driver for converting the amplified signal to a driving force to thereby drive the string. The electromagnetic pickup and the electromagnetic driver are placed at a right angle or a predetermined angle of inclination relative to each other so that induced electromotive forces caused by magnetic flux from the electromagnetic driver negate each other or do not occur in the electromagnetic pickup to thereby reduce the magnetic feedback in the device.

Abstract: A tremolo device for an electric guitar comprises a movable block, to which the strings are anchored, which is swingable about a swing axis perpendicular to the strings. The block has counter balance tensile springs for providing a tension on all of the strings, whereby an equilibrium is established between the tension imposed by the counter balance tensile springs and the tension imposed on all of the strings, whereby the block is kept at a neutral position. A tremolo handle is rotatably attached to the block, and is rotatable between an operative position at which the handle can be manually operated by a player, to produce a movement of the block about the swing axis and change the tension imposed on all of the strings, and an inoperative position at which the handle cannot be accidentally touched by the player.

Abstract: A tremolo device for a guitar includes a flat plate pivotably mounted relative to a guitar body, another plate secured on an under surface of the flat plate, a first fulcrum part of the flat plate for a pivotting thereof to lower a tone of the guitar, a second fulcrum part of another plate for a pivotting thereof to raise the tone of the guitar, and screws fitted to the guitar body and in contact with both fulcrum parts. When a tremolo arm is inactivated, the plates come into contact with the screws at both the first fulcrum part and the second fulcrum part, and when activating the tremolo arm, either one plate or another plate comes into contact with the screws and is rotated about either of the fulcrum parts.