Abstract: An adjuster with a frame attachable to the front end portion of an instrument tailpiece, a lever member with a base portion and a front plate portion swingably supported by the frame, a mounting portion with an adjusting screw positioned therein, an anchoring portion extending from the lever member that projects through an anchor hole to the surface side of the tailpiece to removably anchor a string of the instrument, and a swing transmitting member provided to the frame so as to be interposed between the adjusting screw and the lever member. The swing transmitting member is swingably supported by the frame and includes one or more transmitting levers extending along the string. When the adjusting screw is screwed into the mounting portion, one end of the transmitting lever is pushed down and another end pushes up the lever member, and the anchoring portion is swung to stretch the string.

Abstract: The tuning mechanism comprises a support which carries a shaft on which is mounted an arm that extends generally as a radius of the shaft. The arm has a turnable assembly that receives and retains a string of the instrument, and the assembly may be turned to tension the string. Further, the arm is rockable relative to the support for further adjusting the string so as to afford fine tuning. The turnable assembly is received in a bore in the arm and is made up of a stud over which is sleeved a coil spring via a frictional fit and the spring is connected at one end to the arm whereby the stud, to which the string is attached, is limited to one-way turning in the direction of string tightening.

Abstract: A guitar constructed for so-called "one-touch" tuning including a pivoted lever that is movable between string relaxing and string tensioning positions, and is held in the latter position by a releasable latch. The lever is secured to a string by a ball-like retaining member that is clamped to the string at a predetermined location near the tail end thereof. Preferably, this clamping takes place shortly prior to securing the string to the lever. The retaining member is provided with at least one groove through which the string extends. The retaining member is deformed by crushing same at portions thereof that defines at least one groove thereby collapsing the groove around the string to firmly clamp the retaining member to the string.

Abstract: A device for facilitating precision tuning and stringing of pianos and the like which includes a two-armed rocker (1) one end (8) of which is attached to the string (9) and the other end (2) of which is coupled to the frame (4) of the instrument via a tuning screw (3) to provide precision tuning. Rough tuning is provided by turning the rocker (1) around its longitudinal axis in a groove (6) in another part (5) of the frame.

Abstract: A string holder for a string instrument comprises a support which is secured for the string instrument and formed with a plurality of generally parallel longitudinal guides in each of which a respective support block can be displaced through a relatively long longitudinal distance. This block can be locked at any location along the respective guide. Each of the blocks carries a two-arm lever one of whose arms is secured to the respective string and the other of whose arms is acted on by a screw for displacement of the one arm through a relatively short distance for fine tuning of the distance between bridge and anchor point for the respective string.

Abstract: An electric piano, using only one string per note and no soundboard, employs special mechanical and electrical means capable of controlling all of its various characteristics in order to duplicate the sound and other characteristics of a conventional piano. A floating bridge, floating on the strings and supported solely thereby, is used not for the pickup or transfer of string vibrations to any other device, but to control the characteristics of the string vibrations. Magnetic pickups consisting of a series of coils with adjustable permanent-magnet cores are arranged in special positions along the active lengths of corresponding strings and, in conjunction with frequency responsive capacitor circuitry, convert the vibration of each string into an electrical signal, shape the signal, and provide a composite signal output containing all the tone characteristics needed to produce a true piano sound.

Abstract: There is disclosed a device for adjusting tension of an elongated filament having one end thereof coupled to a supporting structure, the device having a lever arm adapted to be pivotally attached to the supporting structure, a tuning peg having ratchet notches therein and being rotatably attached to the lever arm and being adapted to engage and adjustably wind the elongated filament therearound, a spring stop attached to the lever arm for engaging the ratchet notches of the tuning peg and an adjusting screw attached to the supporting structure and engaging the lever arm for pivotally positioning the lever arm with respect to the supporting structure whereby the tension of the elongated filament is coarsely adjusted by rotating the tuning peg and finely adjusted by pivoting the lever arm.