Abstract: A spool mount for instrument strings that includes a housing mounted on an instrument, the housing having a plurality of spools disposed within, whereby each spool releasably unwinds a string when a locking button is depressed, and a length of string accordant with reaching an extant tuning key may be retrieved and unspooled therefrom to rapidly and easily replace a string on said instrument.

Abstract: A D-Tuner for mounting on the peghead of a banjo. The D-Tuner has keyed cam pegs, adjustable stops for limiting the extent of rotation of the cam pegs, and linear flexible members attached to the cam pegs. The flexible members are suitable for attachment to the second B string and third G string of a banjo for tuning the banjo when the keyed cam pegs are turned.

Abstract: A peg for a stringed instrument having rotatably supported, at the main body 20 for mounting at the head portion H of the stringed instrument, a worm wheel 30 having a winding shaft 40 at one end portion and a worm gear 33 which meshes with the worm wheel 30 and has a knob at one end portion, and at the worm wheel 30, a hole 31 having a portion with a non-circular cross-section is formed, and the winding shaft 40 is provided with a winding shaft main body 42 onto which string is wound and a closely fitting portion 43 which passes through the plate portion 24 of the main body 20 and has a smaller diameter than the winding shaft main body 42. The closely fitting portion 43 is screwed in by being closely fitted in the portion of the hole 31 having a non-circular cross-section and then inserting the tightening device 50 into the hole.

Abstract: A stringed musical instrument is provided wherein each string has two critical points, A fulcrum tremolo is mounted on the instrument for varying the tension of the strings and the distance between the two critical points. The strings are attached to a plurality of intonation modules mounted on the fulcrum tremolo. Each intonation module is adjustable so that the strings can be adjusted from an untensioned state to a proper playing pitch. A bearing assembly is also included to facilitate pivoting of the fulcrum tremolo.

Abstract: An automatically tuned musical instrument provides a means for keeping strings under tension in proper tune. It also provides a mechanism to simplify installing new strings on the instrument. The tuning system includes a magnitude comparator to eliminate crosstalk which can result in improperly tuning one string when receiving a tone from an adjacent string. The system tensions a string or a plurality of strings at fast speed to within a whole tone or their desired frequency and then fine tunes the strings to desired frequencies. The mechanism includes a guide canal for each string to guide the string into pinch rollers and a flexible conduit to guide the string onto a guide reel to provide an easy, sure way to install strings onto the instrument.

Abstract: A string arrangement for attachment to a conventional stringed instrument comprises a substantially conventional string which is carried upon a reel member surrounded by a cover member with the string passing through an opening in the cover member. The reel member carries a sleeve portion which can be pressed over the conventional peg of a guitar or other instrument and can be attached thereto for rotation by a pin passing through the transverse conventional hole of the peg. In this way the string can be readily applied by attaching the free end to the base of the guitar in conventional manner and unreeling the string to a position where the reel member attaches to the conventional peg with little slack in the string. Rotation of the conventional string tensioning key then operates directly upon the reel member to wind in the string onto the reel member and to provide the necessary tensioning of the string.

Abstract: A holder or cassette in the form of a spool having wound thereon a string for a musical instrument, is disclosed. The free end of the string is secured to the spool, while the opposite end utilizes the traditional "ball" or loop which is affixed to the tailpiece or bridge of the instrument.The spool has an axial opening so that it can be mounted over a correspondingly shaped tuning machine shaft, and the spool can also have an internal bar which slips into a slot in the shaft. Musicians can quickly change strings using the invention without the need to actually thread the string through the tuning machine and then cut off the excess as is currently done. Instead, the ball end of the string is inserted into the bridge or tailpiece and a cassette is mounted over the shaft; the tuning machine or peg is then turned in conventional fashion to take up the slack in the string and the instrument is once again ready for use.