Abstract:
HEADPIECE TUNER is integrated into the nut arrangement of a traditional headless musical instrument featuring lever-based individual string clamps, a removable nut, a truss rod adjustment feature and multi-function cross bar handle. A Magnetic Tuner comprising at least one of two magnetic elements secured to a tremolo, in fulcrum tremolos, moveable therewith about the tremolo pivot axis, in a mechanism operable to provide a first force of tension comprising the traditional tremolo coil spring biasing element and/or, in the case of coil spring integrated tremolo stabilizers, provide a second force of tension to enforce the tremolo at the equilibrium point or initial position.

Description:
I, Geoffrey McCabe, claim, a Continuation In Part for HEADPIECE AND MAGNETIC TUNERS, based on the parent application, McCabe U.S. application Ser. No. 14/945,035, Nov. 18, 2015, issued as U.S. Pat. No. 9,484,007, Nov. 1, 2016, for Species III election entitled TREMOLO STOP TUNER AND TREMOLO STABILIZER [and its Divisional application Ser. No. 15/296,401, Oct. 18, 2016 entitled, TREMOLO SPRING AND STABILIZER TUNERS comprising Species I, II and IV]. 
     The parent application presents improvements providing a variable resilient element, capable of holding a variable pre-load, to meet the two primary variable force of tension requirements in a floating tremolo setup for either: 1) apparatuses for establishing initial position or 2) enforcing its initial position and comprising two variable forces of tension, where a) one force of tension is greater than the second force of tension and b) the second variable force of tension created by the resilient arrangement is variably secured to a tremolo, integrated into the fulcrum tremolo spring block and related support tremolo innovations. Each of these arrangements providing a variable elastic pre-load installed on the instrument and meeting the variable force of tension requirements. 
     The General Background of the Invention indicates not only the use of more common resilient elements like coil springs, etc. in devices secured to the spring pocket, etc. but also the magnetic elements in otherwise similar apparatuses to create a variable force of tension to enforce or stabilize a tremolo, page 13: “The Mag-Lok from Super-Vee Tremolos, secured to the spring pocket, US patent pending, is a magnet-based alternative to the compression spring arrangement to ensure the tremolo in initial position during double stop bends and the like that is overcome when the bar is used.” 
     Magnetic fields of two matching poles in proximity to each other exert a force in the direction of the poles, to repel each other like the ends of a compression spring and, conversely, magnetic fields of two mismatched poles in proximity to each other exert a force to attract each other on the axis of the poles like an expansion spring. Varying the relative distance between magnetic elements in proximity varies the torque they exert on each other to create a variable resilient magnetic force. 
     Claims  1 - 10  are divisional and are directed to for the use of magnetic elements for stabilizing or creating the biasing element for enforcing and/or establishing and maintaining initial position of the tremolo at time of initial setup. The elasticity of the force of tension between magnetic elements in proximity mimic the spring&#39;s resilient behavior operable to form an elastic pre-load in the apparatus accordingly. The apparatuses are modified for the characteristic and structure of the magnets. 
     Claims for a Continuation In Part: “an application . . . repealing some substantial portion or all of the earlier non-provisional application and adding matter not disclosed in the said earlier non-provisional application”. 
     Claims  11 - 20  comprise new material directed to Headpiece Tuner improvements for primarily headless guitar and basses, etc. that include two versions of individual string clamps or clamp/cutter arrangements, a bi-directional string loading capacity, a truss rod extension thumbwheel element and a removable cross-bar addition to facilitate turning the truss rod extension thumbwheel element, modify the tone and acoustic response of the neck and store as a stand support. 
     The Headpiece Tuner supports a greater integration with other tuning innovations, for example, the axis of the thumbwheel of the Headpiece Tuner alignment following the truss rod are generally points to the axis of the thumbwheel of the Global Tuner and both work, under variable force of tension, cooperatively with the variable force of tension of the strings to maintain the optimal playing condition achieved at “initial setup”. The choice of weight/material of the Headpiece handle, can be fine tuned to achieve a desired response from the neck, in view of individual players&#39; choices of setup, etc. ie., the weight and tension of the strings, to modify the tonality and sensitivity. 
     The General Background of the Invention of the parent application has been embellished with additional phrases, etc. to support the subject matter more clearly; the section on the Mag-lok [p. 18-19] has been expanded to introduce claim terms and detail related concepts. 
     In the Summary Of the Invention, The Headpiece Tuner section has been added [pp. 20-24] as well as Magnetic Stabilizers/Stabilizer Tuners [pp. 24-27] sections to support claims. 
     Claim  21  is an independent claim for a string musical instrument incorporating the various innovations. 
     Amended figures based on the figures from the parent application and new figures for the new matter are included. Description of the Drawings has been amended accordingly. 
     GENERAL BACKGROUND OF THE INVENTION 
     In a stringed musical instrument, such as a guitar, the strings, placed under tension, extend unsupported between a first critical point usually formed by the nut positioned where the neck joins the head and a second critical point usually formed by a clearly defined point on the bridge positioned on the body. The strings are secured or fixed at one end on the body of the instrument to what is traditionally known as the tailpiece, strung over the bridge and extended past the nut at the transition from the neck instrument to the head, and, for conventional instruments, secured at the other end to the tuning pegs where a string is tensioned and adjusted to a tuned pitched condition, tensioned for play, or, simply, tuned condition. The neck further comprises a fingerboard or fret board that a player presses the strings against to play various pitches up and down the neck; the fingerboard typically is formed with a convex radius that commonly varies between 9″ and 20″. 
     The second critical point can be created as a part of a bridge or combined bridge and tailpiece structure. Traditionally, the size of the bridge element is quite small so as to create a clearly defined single point of contact between the string and the bridge element. It is between these two points that the playable string length is typically determined, sometimes referred to as the scale length or harmonic length. Adjusting the relative distance between the first and second critical points is called harmonic tuning or setting the intonation. Some bridges structures are individually adjustable, that is for each string, relative to the nut for achieving a more precise harmonic tuning. Usually this adjustment of the second critical point for harmonic tuning is carried out first and then the strings of the instrument are tuned to playing pitch. Often referred to as part of the “initial setup”, it is not uncommon that further adjustment of the harmonic tuning is necessary for a variety of reasons, for example, including changing the brand of a string where the alloy of the strings is varied or when the gauge of strings the player chooses changes as well as “setting” the string by manually pulling on the string along the scale length in order to improve elasticity in the string at first tensioning before the string can confidently relied on to hold proper playing pitch during the life of the string. 
     Often the typical construction of the strings, particularly for guitar and bass, includes a plain end and, on the other end, a “ball end” which being a washer-like addition is wrapped by the string itself into a larger form to enable “fixing” or securing the string on the instrument to the tailpiece element; alternatives to the “ball end” include as known to those of ordinary skill in the art as “bullet ends” formed from metal and molded around the end of the string. The tailpiece is usually provides for an opening or recess sufficient in size to receive the strings of various diameters ranging from 0.007″ to 0.070″ or more while being smaller than the diameter of the ball end so as to limit the passing of the ball end through the opening or recess in order to secure or mount each of the individual strings to the body. The wrapping usually extends up to a ½″ towards the plain end and as such the position of the tailpiece structure relative to the bridge element must insure that the wrapping does not extend over the second critical point when arranged on the instrument; this wrapping, under normal circumstances, is not subject to stretch compared to the rest of the string. In the relevant art, “anchoring” strings is often referred to as attaching or securing a string and understood with the limitation that the anchoring is sufficient so that the string is fixedly attached or secured to the instrument under the typical tensioned conditions of the string that typically range from 16 to 20 lbs or greater. Stable fine adjustments of these and other elements have been a longstanding problem for stringed musical instruments. 
     Additionally, the popularity of guitars and other multi-stringed instruments having more than the typical 6 strings and/or using longer scale lengths, etc. are capable of a greater pitch range which creates the need for strings of a larger diameter. One solution is to utilize “taper core strings” that have one or two less layers of wrap near the “ball end” of the string to go over the bridge elements. Further, a “taper wound” string simply tapers away these layers of wrap as near the ball-end of the string, so the part that goes over the bridge has a smaller diameter. “Exposed core” strings taper down to the core itself, so the core goes over the bridge and lowers the action and increases sustain/resonance. These designs are often seen on B strings, typically a low string on a five string bass, for example. The logic is that a taper core string, etc. approach will help with intonating a larger diameter string. In some of these cases the strings are mounted to tailpiece portion by inserting the string through or over the bridge elements to avoid complications due to increased string diameter. The larger diameters can be problematic given the dimensions of vintage systems. 
     Playing pitch or proper playing pitch or pitched string condition is generally understood by one of ordinary skill in the art to be the proper pitch of a guitar string relative to the remaining guitar strings when a guitar is played “in tune.” For example, in a standard tuning arrangement, for a six string guitar, based on the standard A=440 Hz, the playing pitch of the 1 st  string (highest) is tuned to note E (329.63 Hz), the playing pitch of the 2 nd  string is tuned to note B (294.94 Hz), the playing pitch of the 3 rd  string is tuned to note G (196.00 Hz), the playing pitch of the 4 th  string is tuned to note d (146.83 Hz), the playing pitch of the 5 th  string is tuned to note A (110 Hz), and the playing pitch of the 6 th  string is tuned to note E (82.41 Hz). 
     Modern expression of tuning pegs have evolved to include to additional features incorporated into the turning of the tuning pegs such as the capacity to either clamp the string and/or cut the string after first inserting the associated string through the traditional cross opening in the tuner post—in some cases, tuning pegs are fashioned to do both. Tuners on the peg head include an assembly that comprises a cutting edge and cooperative cutting surface that cuts the string during initial rotation. 
     Other iterations of the guitar have included the “headless guitar” wherein the end of the instrument&#39;s head is truncated, obviating the traditional tuners, creating a design requirement forming a headless nut or “headpiece” arrangement to both 1) support the individual strings transverse the direction of the neck following the radius of the fingerboard at the end of the neck and 2) secure each string on the other side of the nut element from the tailpiece, for example, so the strings can be otherwise tensioned to pitch by tuners on the body. The strings are inserted through the headpiece or nut arrangement and fixedly secured at the end of the neck beyond the nut. Steinberger created double ball end strings and followed by Floyd Rose created double “bullet-end” strings to eliminate the cut string end issue. 
     The first truss rod patent was applied for by Thaddeus McHugh, an employee of the Gibson company, in 1921, though the idea of a “truss rod” appears in patents as early as 1908. Most electric and acoustic guitar as well as basses and other stringed musical instruments include an “truss rod”, an one- or two-piece adjustable metal rod that goes down the inside of the center of the neck, beneath the fingerboard, to balance the force of tension exerted by the [collective] “string pull” tending to increase the “bow” in the neck against the force of tension exerted by the truss rod by tightening the truss rod nut to decrease the bow or relief and to, thereby, stabilize the lengthwise forward curvature and, adjust the “relief” of the neck. 
     The truss rod further comprises a nut located at one end, usually at the headstock, under a cosmetic plate with typically three small screws mounting a cover positioned just behind the nut, or where the neck joins the body. The cap or nut usually has a hex shape to either receive a 4 mm hex wrench or a 5/16/10 mm hex nut driver, for example, wherein inserting the appropriate hex-drive tool to rotate the truss-rod cap within a range of, say, a ¼ turn in either direction is more than adequate in most instances—turn clockwise, to tighten and flatten, to reduce “relief” and improve ease of pressing strings, ie, “action”; and turn counterclockwise to loosen and add a slight concave curvature to add “relief” so the strings have more room to vibrate above the frets. When instrument is exposed to environmental elements over time, temperature and humidity swings, such as when seasons change, or often daily or weekly, depending on conditions, which alters the “initial position” of the neck relief from that at the time of “initial setup”, not only altering, the intonation, but also making notes sound “buzzy” or make the action firmer and harder to fret. 
     However, the typical headless design leaves the truss rod cap exposed, extending through the greater part of the length of the neck, underneath the e d of the headless nut arrangement, for an advantage those players enjoy. There are no current designs for the headless nut that integrate the headpiece with a truss rod tuner to adjust for the truss rod “on-the-fly”,
         “This combo headpiece is a beautiful design for headless guitars, as it allows the player to use either double ball-end strings or standard single ball-end strings . . . it has a center opening for truss-rod equipped necks . . . . Easy to install and ships complete with mounting screws and allen wrench.” http://www.headlessusa.com/j custom-headpiece   “The truss rod access hole is very close to where the neck plane ‘shelf’ is (assuming a ¼″ thick fretboard). This headpiece is intended to match spec, re Steinberger-style necks. So I will have to angle the headpiece downward to line up with the location of my Stew-Mac Hot Rod adjuster, centered ˜8.5 mm below the neck plane surface . . . .” http://www.projectguitar.com/forums/topic/46474-headless-bridge-and-headpiece grounding/       

     Accessing the truss rod cap to tune the “neck” back to “initial position” with the hex-based tool can be cumbersome, due mostly to implementation as discussed above, and can cause lengthy delays—accordingly, adjustment of relief is often an overlooked aspect in daily consideration for maintaining the tuned condition of the instrument. 
     In the Proelsdorfer U.S. Pat. No. 2,304,597, string tensioning devices placed on the tailpiece for fine tuning the pitch of the strings of violins, guitars and the like, were disclosed; such pitch adjustment is quite limited in range, comprising generally an interval falling between that of a whole tone and a major third at best, and designed to offer the tuning of the strings a minor adjustment of pitch after the general tuning is achieved with the tuning pegs on the head of the instrument which traditionally first provides for raising and adjusting the tension of the strings to pitch from an untensioned condition and then setting the string. This is regarded as fine tuning and the apparatus for doing so, the “fine tuners”, usually comprise an adjustment knob or thumb screw. 
     It is known to those skilled in stringed musical instrument design and construction that various tremolos have been proposed and utilized for varying the tension of all the strings simultaneously for the purpose of creating a tremolo sound. Further, it is known to those skilled in the art that there are a great many commonly used names for such devices, such as tremolo, tremolo device, tremolo tailpiece, tremolo bridge, fulcrum tremolo, fulcrum tremolo bridge, fulcrum tremolo tailpiece, fulcrum tremolo bridge-tailpiece, vibrato, vibrato bridge, vibrato tailpiece, vibrato bridge tailpiece, etc. 
     In one specific species, known as the fulcrum tremolo, first introduced in Fender U.S. Pat. No. 2,741,146 (“Fender &#39;146”) shows and provides a device comprising a novel structure, which incorporates the bridge and the tailpiece. The portion supporting the bridge elements is called the bridge plate or the base plate. Further, both the bridge and the tailpiece elements connected to the base plate both move together as the fulcrum tremolo device is pivoted. Typically, in order to facilitate the fulcrum tremolo pivoting about its fulcrum axis, counter springs, as a biasing element, are utilized to counteract or counter balance the pull of the strings created by the collective tension of the strings at playing pitch. Accordingly, a singular and defining aspect of the fulcrum tremolo is that the harmonic tuning is upset as the device is pivoted; and, accordingly, for an instrument equipped with a fulcrum tremolo, it is unique in that only restoring all of the strings to the pitched condition at the time of initial setup also simultaneously restores the harmonic tuning for all the strings. The base plate upon which the individual bridge elements are adjustably secured has a beveled ridge portion which is secured to the instrument body by six screws permitting pivotal movement about a fulcrum axis which varies the tension on the strings and produces the desired “tremolo effect”; in general, this device allowed for extensive dropping down of the pitch of all the strings and a modest upward capacity that further enabled the familiar mild pedal steel or Hawaiian guitar vibrato effect provided in gentle pivoting. 
     In this first vintage fulcrum tremolo, herein referred to as Type I, the metal bridge elements of Fender &#39;146 are loosely held in place by a spring loaded attachment screw arrangement pivotally secured through openings in a small folded portion of the base plate farthest from the fulcrum axis. The bridge elements also incorporate set screws for varying the relative height of the bridge elements and, therefore, height of the respective second critical points relative to the base plate and by extension, to the body and neck. 
     The fulcrum tremolo is generally defined to have a base plate pivotally mounted to the body of the instrument and an “inertia block” or “tone block” or “spring block” that extends transverse the direction of the strings 90° to the base plate. The instrument body is fashioned to include a single body cavity comprising two distinctive sections. There is 1) an approximate 3.00″×1.00″, generally rectangular, transverse the direction of the strings, traditional “tremolo pocket” or “trem pocket” extending generally perpendicular from the top surface of the body to meet at 90° providing two approximate 3.00″ wide opposing faces, a first face closer the nut and a second face further the nut; and 2) the traditional, generally rectangular, approximate 4.00″×2.25″×0.775″ deep, cutout extending in the direction of the strings in the back of the instrument body, a “spring pocket”, to receive the spring arrangement. The spring block has a first surface closet the nut and a second surface, each surface generally perpendicular to the top of the instrument and generally parallel to the tremolo pocket first and second face. Although there are differences in specifications from one instrument manufacturer to another for the various designs of the fulcrum tremolos that are available, there is approximately 0.125″ to 0.250″ clearance, between the spring block and the tremolo pocket face closest to the nut, to provide for upward pitch change as the spring block pivots towards the nut. Counter springs are usually connected to the body of the instrument at one end and, on the other end, to a separate spring attachment means transverse the base plate, usually a block of metal, milled or cast or a combination of the two, which being secured to the bottom of the base plate by three screws 90 degrees to the base plate, is often called a spring block or inertia block. 
     The typical spring arrangement includes, in addition to the biasing springs connected to the spring block, a “spring claw” to receive the other end of the biasing element secured by two wood screws to adjust the position of the spring claw relative to the body for a simple but cumbersome adjustment method. There is ample room for the spring block to pivot freely within the “tremolo pocket” cavity during use. 
     One of the most troublesome problems with prior art for the fulcrum tremolo has been maintaining the “initial position” of the tremolo achieved at “initial setup” when all the strings are brought to proper playing pitch as the harmonic tuning is achieved. When a musician plays on the string there is usually some kind of string stretch over time that results in the overall tuning, and thereby, the “initial position” of the tremolo going out of balance. Specifically, when the pitch of the string changes, the position of the fulcrum tremolo and the position of the second critical point relative to the nut changes which then instantly alters the harmonic tuning. This is especially problematic if a string breaks with this type of tremolo; since the missing force otherwise created by the tension of the broken string allows the entire tremolo to be subject to the known “backward tilt”, all the remaining strings are un-manageably sharp in pitch and the harmonic relationship to the fret placement and scale length is distorted, generally, to an undesirable degree. Furthermore, when the tremolo base plate tilts forward, the spring block tilts away from the nut; and when the tremolo base plate tilts rearward, the spring block tilts towards the nut. 
     This singular characteristic adds complexities in obtaining the primary goal of achieving a stable equilibrium, initial position, between the force of the tension provided by the use of two to five biasing or counter springs (connecting between the tremolo and the body) in relation to the force of tension of all the strings (connected to the fulcrum tremolo and the end of the neck at the peg head by the tuning pegs or an optional nut arrangement that secures the strings without tuning pegs, etc. at the end of a headless neck). 
     Accordingly, these and other inherences need to be addressed in achieving a true and lasting initial position for the fulcrum tremolo and has been the object of many inventions. In this inherent inter-dependant system of tensioning forces, contrary to the requirements of other tremolo or fixed bridge arrangements, (in the ideal instance where the essential conditions of the initial setup have been established and the appropriate tensioning force of the springs provisioned), the precise tensioning to proper playing pitch for any less than the total number of strings will inherently fail to achieve pitch and harmonic tuning for all of those strings attached to the tremolo. 
     Often the pivot is subject to wear and the tremolo does not always return to its initial position. Great care is required to establish the initial position, since both aspects of adjustment are interactive for “floating tremolo setups”, and since it simultaneously provides both the proper harmonic tuning and proper pitch tuning for each of the individual strings in order to enable a lasting “initial setup”. 
     Therefore, for stringed musical instruments, as is known to those skilled in the art:
         The second critical point is a clearly defined point on the bridge or individual bridge elements, the adjustment of which relative to the first critical point on the nut defines the length of the string or scale length and the adjustment of which is called harmonic tuning.   For fulcrum tremolos as originated by Fender U.S. Pat. No. 2,741,146, when pivoted:   Both the bridge portions and the string anchoring means, the tailpiece, simultaneously move about a common fulcrum axis;   The harmonic tuning is upset and is only restored when all strings are at proper playing pitch;   The tuning pegs or other means of tensioning the strings are inter-dependant with each other in obtaining initial position; and   Various factors can disturb the equilibrium point between the tension of the strings and the tension of the counter springs and as a consequence disturb the initial position.       

     For those fulcrum tremolos equipped with fine tuners as with Rose U.S. Pat. No. 4,497,236, Storey U.S. Pat. No. 4,472,750 and Fender U.S. Pat. No. 4,724,737:
         The bridge and tailpiece portions simultaneously move about the fulcrum axis when the device is pivoted for the tremolo effect;   The fine tuner screws simultaneously move with the bridge and tailpiece portions about the tuning axis when fine tuning; and   Fine tuners are designed to offer the tuning of the strings a minor adjustment of pitch after the general tuning is first achieved, typically, by the tuning pegs on the head of the instrument; and   Adjusting the tension of a string by the fine tuner knob alone simultaneously adjusts the harmonic and pitch tuning and can achieve tuning a string to proper pitch conditions while simultaneously achieving proper harmonic tuning.       

     Knife Edge Pivots for the Fulcrum Tremolo 
     Rose (U.S. Pat. No. 4,171,661) shows adopting a novel shaped beveled edge to the base plate, called a “knife edge”, adjustably supported by two screw-like members, referred to generally as riser posts, positioned in the body to collectively improve the return to initial position after pivoting the fulcrum tremolo device. The knife edge fulcrum pivot arrangement provides for the base plate to be positioned generally parallel to the instrument body, often referred to as a “floating tremolo”, for example, and offered the novel possibility to substantively increase the tension of the string for upward pitch changes by rocking the base plate “rearward towards the body” with the arm. The inclusion of iterations of Fender &#39;146, herein referred to as Type I, to include, similar to Rose, a knife-edge design on the leading edge, closest to the nut, of the base plate with a riser post arrangement adjustably connected to the fulcrum tremolo, herein referred to as Type II. 
     These two vintage fulcrum tremolos of the last century, Fender in the 50&#39;s and Rose in the 70/80&#39;s, are in part distinguished by the differing standards for the placement of the riser posts, that receive each of the knife-edges to create a pivot axis, relative to both first critical point on the nut as well as the second critical point on the bridge element. Accordingly, there are differences in the body pocket but less so for the cutout that receives the biasing springs and the distance from the face of the spring block nearest the nut to the corresponding face of the tremolo pocket. 
     String Locks and Clamping Nuts for the Fulcrum Tremolo 
     Improvements to the Fender &#39;146 fulcrum tremolo have included “string clamps” at the nut, installed along with a “string tree” for some guitars, a horizontal bar positioned between the tuners and the “locking nut” arrangement, to facilitate stability and “string clamps” at a point on the opposite side of the intonation point or second critical point on each of the bridge elements relative to the nut in order to limit string stretch to the prime vibratory portion of the string within these two points defining the scale length. 
     U.S. Pat. No. 4,171,661, Floyd D. Rose, “Guitar tremolo method and apparatus”, issued 1979 Oct. 23 (&#39;661): 
     
         
         
           
             It is important, however, to also have restraining of the strings at the nut 13 . . . . In use, the guitar will first be tuned as desired, by customary means (15) and while the restraining devices at both ends are loose. When the guitar is completely tuned according to the desired use, the restraining devices at both ends will be tightened so as to maintain the tension between the bridge and the nut at a consistent and proper tension and will not allow sliding of the strings over either the nut or bridge position. 
           
         
       
    
     The &#39;661 string clamps included a nut formed into a base; the arrangement offered in several configurations comprising several string radii, such as 9″, 10″ 12″, etc. to match the bridge and fingerboard radius. The base is approximately 0.600′× the width of the guitar neck it is to be installed on, and, further formed to receive three screws and associated clamp pads threadedly connected to the base in order to clamp strings in pairs, that is two strings were clamped by each screw/pad arrangement. The neck area that supports the nut is typically modified to form a 0.600″ shelf, cut to receive the depth of the base, so that the nut portion supports the strings over the fingerboard at the preferred string height as part of initial setup. The back of end of the neck is further modified with two openings transverse the direction of the strings to receive each a bolt that is threadedly secured to the bottom of the base to secure the nut arrangement to the guitar. 
     In Steinberger, double-ball end strings were developed wherein one ball-end was placed in a recess in a nut arrangement secured at the end of the headless neck and the other ball-end placed in a recess in the tremolo on the body; the tremolo included tuners to tension the string to playing pitch—no locks or clamps were used. 
     Floyd Rose SpeedLoader nut is a redesign of the Rose clamping nut to fit the 0.600″ pattern, developed 1995-1999, and introduced around 2003 that combines Floyd Rose Original with the SpeedLoader system, that requires special strings and is manufactured under license of McCabe US Patents. The SpeedLoader strings are a variation on the Steinberger strings that replaced the ball-end with bullet-like additions in a pre-cut length fitting only for the Speedloader system. Rose U.S. Pat. No. 5,945,615—August 1995. The Speedloader bullet-like ends are placed in individual recesses in the nut arrangement to secure the stings under tension. 
     It is reported that recently, Gibson USA applied for a US patent for the Zero-Fret Adjustable Nut: “However, the Zero-Fret Adjustable Nut (patent applied for) . . . isn&#39;t like any other zero-fret nut because it&#39;s adjustable which offers some major advantages. Two 0.050 Allen screws (accessible between the 1st and 2nd strings and the 5th and 6th strings) adjust the nut&#39;s height and angle, so you can customize the action on both the bridge and nut ends of the strings.” [http://www.gibson.com/news-lifestyle/features/en-us/how-to-customize-action-with-gibson.aspx] Further, Warwick in Germany provides a similar arrangement, “Just a Nut III” (2007-2010)—“We have discovered Tedura polymer strengthened with fiberglass, whose outstanding abilities to transmit vibration was proven in laboratory tests, which then became the basis for further tests revealing that Tedur is extraordinarily resistant against breakage and wear. With that, Tedur has fulfilled all the expectations we&#39;ve placed on a modern nut.” [http://www.warwick.de/en/Warwick---Support--FAQ--Just-a-Nut.html] 
     Concurrently, headless guitars were developed as discussed above; the headpiece serving to secure the strings at the nut in the instance of no tuning pegs—to adapt the Rose approach, to use the clamp pad and associated tightening screw, for each string individually, has been shown by many luthiers. 
     Further, an Intonation Adjustable Nut™ for guitar, U.S. Pat. No. 8,76,559, provides for a simple intonation adjustment that replaces the traditional nut or zero fret, designed for headless acoustic or electric guitars in the vintage standard with body mounted tuners, begun with, Steinberger, extended to Strandberg, ABM, Bondy and other luthiers, such as Rick Toone, for example, for placing a locking nut on the guitar neck. 
     Further, in “Locking Nut Assembly For A Guitar”, U.S. Pat. No. 4,579,033 A, William H. Edwards (1986) a variation on the one clamp pad per two strings taught by Rose &#39;661 that replaced the clamping screw with a cam-based lever and screw arrangement with an open or unlocked position for threading the string and a locked or closed position for securing the string. The adjusting the screw is operable to adjust the position of the lever relative to the base so the cam lobe presses against the clamp pad to secure the string when in a closed or locked position. 
     (Abstract): 
     
         
         
           
             A finger operated locking nut assembly for a stringed instrument is provided including a baseplate for separating and maintaining the strings over the fretboard, locking block for pressing the strings against the baseplate and a cam action lock screw. The lock screw provides a first, unlocked position for allowing the strings to slide for tuning of the instrument and a second, locked position for maintaining the tune of the instrument during play. The preferred lock screw includes a threaded body to allow rough adjustment and a transverse head bifurcating a pivoting lever tab to define spaced cams. These cams provide spaced contact points across the block for even pressure and secure locking of the strings. 
           
         
       
    
     Historically, other approaches to securing the string at the nut, a headpiece, utilize a “regular” string, ie., one pain end and one ball end. Some headpieces provided for ball-end recesses and/or string clamps for the plain ends to secure the string at the end of the neck, immediately beyond the nut. 
     The Stopped Tremolo 
     It is also known that many musicians, despite having the requisite hardware on their stringed instrument to enable a “floating tremolo” setup, intentionally choose to “block” or “stop” the fulcrum tremolo from being tilted “rearward” in order to remove the potential for an unwanted increase in pitch of the strings. This condition or setup is commonly referred to as a “blocked tremolo” or “stopped tremolo”—accordingly, the stop is considered a “hard” stop when it completely prevents pivoting the tremolo in one direction when at initial position. Additionally, as a significant part of this setup, increasing the overall tension of the biasing element past the minimum force required to make initial contact with a “hard” stop at initial position, is required to compensate for the increases in force in the tension string during bending notes, etc. meeting at least three objectives: 1) when a string breaks, the tremolo stop will ensure initial position, so that tremolo does not tip rearward and the rest of the strings do not go up in pitch, despite the missing counter balancing force of the un-tensioned or broken string, 2) ensuring the tremolo returns to initial position after radical use no matter what—to eliminate, among other things indigenous to the floating tremolo, the maintenance and care of initial position over time defined by the delicate balance of the forces and related wear and tear over time and 3) to make the tremolo less likely to be activated unintentionally compared to a floating tremolo, useful in general, for strumming, and makes double stops much more accessible when the force of the biasing element is increased. Tremolo stops of this nature have been created by small pieces of wood, plastic, etc. approximately 0.125″ ˜0.250 or so thick which have been placed in the tremolo pocket between the spring block and the face of the tremolo pocket closest to the nut—even in “emergency” situations, a stack of guitar picks taped to the inertia block&#39;s face closest to the nut, in sufficient dimensions, can used for an evening, if need be. 
     Further, stopping a floating tremolo is common to meet the demands of auxiliary tension adjustment mechanisms: U.S. Pat. No. 5,359,144 (“&#39;144”) October 1994 to Robert Benson. Commercialized as the “D-tuna” mechanism for the “double-locking” Floyd Rose tremolos, the mechanism is designed to quickly re-tension the 6 th  string from standard “E” down a whole step to “D” for “drop-tunings”, i.e., instances where the pitch of at least one string is varied compared to standard tuning—the dynamics of the forces of tension between the strings and springs require, for optimal usage, a stopped tremolo:
         A pitch changing apparatus, providing bi-stable operation within a tremolo system which produces two distinct pitches for selected strings . . . .       

     In the Abstract:
         The tension correcting mechanism is manually rotated to adjustable stop positions of required spring counter-tension, thereby keeping all strings in tune under conditions of changed total string tension.       

     Van Halen: (http://www.dtuna.com/faq.php):
         Why do the other strings go out of tune when I drop to D?   The bridge must be stabilized first. This is done by blocking the bridge so it cannot pull up. If your bridge is stabilized and the other strings are still going out of tune, you may need to increase the overall “spring tension” by moving the spring claw further from the block.       

     Accordingly, it is recommended by Van Halen that the “D-Tuna” device of &#39;144 works better with an additional element or mechanism that will provide a “hard” stop the tremolo when the 6 th  string is tuned to “D”, the lower of the two target pitches; and, in order to ensure initial position of the fulcrum tremolo at the higher target pitch, since a hard stop requires increasing the overall force of the biasing element sufficient to compensate for the small increase in force, which unaddressed would yield a forward tilt otherwise present at the higher-tensioned “E” target pitch. 
     Floating Tremolo and Tremolo Stabilizers 
     One disadvantage, for some players, is that a “hard” stop eliminates the original capacity for light tremolo wavering effects around initial position and upward pitch bends. Accordingly, many players today would prefer a setup that acts like a fixed bridge for small force changes like bending strings, strumming at initial position yet “gives” and acts like a floating tremolo for using the tremolo arm for larger modern, pitch changes, such as “dive bombs”, as is distinguished as a “soft” stop or tremolo stabilizer. As is known, the biasing element or spring system, provides a continuous generally linear force curve to establish equilibrium at initial position, but is not capable of changing its rate of tension, in general, stretching gradually and gradually as more force is applied. 
     Various mechanisms have been presented to assist the traditional biasing springs of Fender &#39;146 in view of modern demands, such as the Hipshot branded “Tremsetter”, Borisoff et al, U.S. Pat. No. 4,928,564 (“&#39;564”). The Tremsetter device secured directly to the body&#39;s spring pocket, provides an adjustable pre-tensioned compression spring element added to complement the traditional biasing element to provide a discontinuous force curve exerted on the tremolo in order to provide an adjustable “soft” stop or tremolo stabilizer—the spring arrangement operable to increase the force required to pivot the fulcrum tremolo from initial position; its operability primarily to more firmly maintain the initial position of the floating tremolo compared to usage with an unassisted biasing element. Accordingly, when a force is exerted to move the tremolo out of initial position, that same tremolo is subject to a restoring force that is being borne by the stabilizing device limited enough in its range so that the compression spring element is active until the pre-tensioned restoring force is overcome during operation of the tremolo. 
     The Hipshot device and multi-spring variations like it, the Ibanez BackStop, the WD Tremolo Stabilizer, the ESP Arming Adjuster, the Goeldo BackBox, not all of which are available in the US at this time, none-the-less all comprise a compression spring-like arrangement deployed to complement the traditional biasing element, each secured to the tremolo spring pocket, tensioned upon installation to an approximate force of 8˜10 pounds, capable of making variable contact with the spring block and urging the spring block in a direction away from the nut—these devices do not pivot with the tremolo about its axis—it requires approximately 4 pounds of force to “bend” a typical electric guitar unwound string a whole tone up in pitch under typical situations, 8 pounds or so of force will reinforce or ensure initial position under the conditions where two strings are bent. 
     Each such device employs a tensioned compression spring that seeks to stabilize initial position with an adjustable “soft” stop, to avoid the limitations of a ‘hard” stop and to offer more stability in the instance of double stops which are otherwise more difficult:
         A method of stabilizing a neutral position of a tremolo system including a pivoted bridge assembly including the steps of tensioning all of the strings of a guitar to a selected pitch slightly less than a desired pitch, tensioning certain counter-balance springs connected between said bridge assembly and the guitar body to oppose the string tension, and mechanically adjusting a certain counter-balance spring to bring the tension in the guitar strings to a desired pitch whereby said mechanical adjustment provides a mechanical stop for returning all of the guitar strings to a selected pre-tuned pitch.       

     Numerous other complementary mechanisms are secured to the tremolo spring pocket to enforce the position of the spring block such as Hirayama U.S. Pat. Nos. 6,552,252 and 6,686,524 for Ibanez include auxiliary springs to enforce initial position. Geier U.S. Pat. No. 7,427,703 commercialized as the “Tremol-no” releasable tremolo stop is also secured to the tremolo spring pocket in the body:
         A quick-release tremolo lock device for installation into a tremolo recess, and for mounting to a movable bridge or a tremolo block of a stringed instrument such as a guitar. The tremolo lock device includes a spring mount that is adapted to be fixedly attached to at least one wall of the tremolo recess and configured to capture an end of at least one tremolo spring. A slide key is also incorporated into the device, which is connected to the spring mount about a proximate portion of the slide key. The device also includes an adjustable quick release slide receiver that is adapted to receive and to releasably capture a distal portion of the slide key to fix the position of the receiver relative to the slide key. The device further includes a tail piece joined to the quick release slide receiver and configured to be mounted in a spring hole of the tremolo block.       

     Lavineway U.S. Pat. No. 7,189,90 is provides a tension bar connected to the body operable on the spring block to ensure initial position:
         A tension bar is held against the back of a lower portion of the tone block by at least one tension bar spring when the tone block is in a neutral position. Stopping means are provided to prevent the tension bar from urging the tone block forward of the neutral position.       

     The Mag-Lok from Super-Vee Tremolos, US patent pending, is another stabilizer device for the fulcrum tremolo that includes a magnet-based alternative to achieve the elasticity of the compression spring. In this case, the Mag-Lok provides a variable resilient force of tension, in the otherwise typical design, following the same mounting arrangement as the group of coil spring stabilizers discussed above, ie., secured to the spring pocket, variably contacting the end of tremolo spring block to exert a variable magnetic force, in the direction away from the nut, to comprise a second force of tension. The second force of tension to complement the tremolo springs first force of tension and adjustably ensure the tremolo at initial position during double stop bends and the like and, which otherwise, can be further overcome when the tremolo arm is used. 
     All elements exhibit some form of magnetic property. Only three magnetic elements, iron, nickel and cobalt including neodymium show properties of ferromagnetism. [ie., the capacity of remaining permanently magnetized]. Magnetic force results from electrically charged elementary particles called electrons. Electrons are always in motion. Magnetism or magnetic force is an elastic push or a pull, attraction or repulsion, between a charged magnetic element and a second magnetic element at a distance or proximity due to the inherent characteristics of a magnetic field. This magnetic field providing directional torque in the space around it comprising directional poles, ie “North” or “South”, 1) elastic attracting or repelling other magnetic elements objects or 2) aligning itself on a directional or polar axis to an external magnetic field and 3) providing a relative magnitude of the elastic magnetic force based on relative proximity. Magnetic fields of two matching poles aligned to each other in proximity to each other exert a force in the direction of the poles, to repel each other like the ends of a compression spring and, conversely, magnetic fields of two mismatched poles aligned to each other in proximity to each other exert an elastic force to attract each other on the axis of the poles like an expansion spring. Varying the relative distance between magnetic elements in proximity varies the torque they exert on each other to create a variable magnetic force. 
     Smith U.S. Pat. No. 9,029,671 provides for a device secured to the “upper surface of the body” adjustably connected to the tremolo base plate operable to selectively stop a floating tremolo:
         A tremolo lock as provided preferably to allow the operator to engage the lock or stop from the topside of a guitar and tremolo base plate completing a floating double locking tremolo system preferably for electric guitars.       

     The Hipshot Tremsetter is also known with the D-tuna in order to improve the accuracy of the pre-determined target pitches for a floating tremolo. Dam&#39;s U.S. Pat. No. 7,053,287, also secured to the body&#39;s spring pocket, for a similar device secured to the spring pocket for creating a soft stop include:
         A compensator for a tremolo for a stringed musical instrument, such as an electric guitar. The compensator has an integrated tremolo stop, allowing a musician to continue playing without undue delay in the event a string breaks.
 
Further,
   The object of the present invention is to provide a compensator having an integrated tremolo stop which allows the musician to resume playing with a minimum of delay after string breakage, and to provide ready access to the tremolo stop while keeping the number and size of the openings as small as possible.       

     Didan U.S. Pat. No. 6,943,284 September 2005 for a retractable tremolo stop mechanism comprising a retractable cam adjustably secured to the top body surface bracketed between the spring block and the base plate:
         . . . , having a first inoperative position and a second operative position in which it stabilizes the bridge plate by limiting movement of the bridge plate in one direction in response to the spring means, means for maintaining said canny in said first position and said second position comprising of a frictional restraint in contact with said cam, method for establishing the normal position of the bridge,   The cam is selectively operable by the player between an inoperative (retracted) position, and an operative position in which it serves to stabilize the bridge plate.
           The cam is pre-set with a limit stop whereby its actuation stabilizes the bridge plate at a position providing for normal tune of the remaining strings despite the failure of any one or more strings, or for purposes of tuning the instrument.   
               

     Rose U.S. Pat. No. 8,946,529, February 2013, apparatus includes a modification of his fulcrum tremolo for top mounted Gibson-style applications to include a re-enforcing element for initial position—this design obviates the traditional spring block that pivots within the body of the instrument and the biasing element arrangement:
         The apparatus includes a mounting frame configured for mounting on the surface of the body of the instrument, an attachment post secured to the body, a base plate pivotally mounted with respect to the attachment post and having a surface adapted to receive a force, a mounting assembly mounted on the base plate for holding a string of the instrument, and a first resilient member assembly for engagement with the mounting frame outside the body of the instrument and supplying a stabilizing force to the base plate against a tension force in the string. The apparatus includes a second resilient member assembly configured to be engaged with the mounting frame outside the body of the instrument and to supply a force to the base plate surface adapted to receive the force.       

     As discussed above all of the various compression spring based mechanisms described above are secured to the body, in the spring pocket, in particular, and, accordingly, do not rotate with the tremolo at any time, to make variable unsecured contact with the spring block to apply an expanding force supplied by compression springs against the spring block in a direction way from the nut to augment the linear force applied by the biasing element pulling in the direction towards the nut. In each case the adjustment members are very small, often positioned between the individual springs of the biasing element and difficult to adjust initially and to compensate for changes over time. 
     The Global Tuner invention offers a quick way to adjust the dynamic relationship between tensioning forces between the strings and springs with a thumbwheel to maintain “initial position” over time. The typical Global Tuner splits the tremolo&#39;s inertia or spring block into two sections transverse the direction of the counter springs. One section is a base element or main block that is connected to the tremolo base plate and the other section comprises a holder element connected to the biasing element or counter springs, in a format that is connected to the main block and which is, in either case, adjusted by a thumbwheel arrangement. Since acoustic coupling is best in the instance of the greatest contact between the associated parts, when the spring holder element is slideably positioned within, say, 0.031″ of the base element, a first position, when the assembled parts have the greatest contact area to each other. Threading the thumbwheel to variably position the holder element in either direction will restore initial position under normal conditions while maintaining the best coupling for this design. 
     The Global Tuner provides a variable adjustment mechanism invention that neither meets the requirements to achieve a stopped initial position nor a “soft” stopped initial position—the need for a stable and adjustable tremolo stop tuner is clear. 
     SUMMARY OF THE INVENTION 
     The Headpiece Tuner 
     The Headpiece Tuner comprises a housing secured to the end of the “headless” neck integrating an 1) an adjustable removable nut portion, in various sizes to accommodate various fingerboard radii, for individually supporting the string at the end of the neck, 2) an internal screw adjustment element for varying the Headpiece Tuner housing&#39;s position relative end of the neck addressing variances in setup requirements, 3) two approaches to an individual string clamp arrangements to secure an associated string, 4) an interior recess, sufficient in size for either clamping design to a) clamp a pre-cut string and safely keep the sharp ends of cut strings out of the way or b) clamp and cut the end of the string to size by pivoting a lever, the lever formed with either a pivot slot or cam and a set screw arrangement for adjustment to various string gages, 5) a truss rod access port so that a hex wrench, for example, can be inserted into the truss rod arrangement for adjustment and, further, 6) the truss rod adjustment aspect comprising a thumbwheel arrangement featuring a thumbwheel extension element rotatably connected to and positioned, in part, within a housing element and in part extending and connecting to the traditional truss rod adjustment arrangement. 
     The Headpiece Tuner features a housing element or base element that includes individual string passageways extending from openings adjacent the nut through to the interior recess of the housing element. Individual associated internal string clamps elements are provided, a removable nut for separating and maintaining the strings over the fingerboard. 
     The individual clamping mechanisms in  4   a  includes a separate pivoting clamping lever in the interior for clamping each associated string individually within the string passageway and a setscrew threadedly connected to the housing. The setscrew, is operable to position the pivoting lever clamp in a first, unlocked position for allowing the string to slide through the string passageway and a second, clamped position to secure the string between the surface of the pivoting lever clamp and the housing element for securing the associated string to the Headpiece Tuner. 
     The clamping lever of  4   b  above comprises an open or unlocked position and a closed or locked position where the pivoting lever extends beyond the recess of the housing element. The clamping lever in an open or unlocked position reveals an associated recess in the housing into which an associated string can be placed. The clamping lever comprises a first string contact surface, a first string cutting surface and a pivot slot, a cross-pin variably supports the lever clamp within the pivot slot, all transverse the direction of the strings, and a set screw to define the pivot slot. A cam lobe on the lever with a setscrew could also be used [not shown]. The housing provides a corresponding associated second contact surface and second cutting surface formed in the recess. Pivoting the lever to a closed position will both clamp and cut the associated string. A pre-cut string could also be clamped in this manner. 
     Another feature of the Headless Tuner allows for flexibility in stringing the instrument. For example, two methods of installing and clamping: 
     1) Install the Plain End the String Over the Nut and into the Interior of the Housing:
         The ball-end secured at the body, cut the plain end of the string a length approx 1 inch beyond the nut, insert from the direction of the body and thread the associated setscrew to clamp, the approximate 1 inch length to ensure the cut ends do not extend beyond the housing, thereby, eliminating exposed sharp cut ends.       

     2) Install the Ball-End or Like of the String from within the Interior of the Housing and Over the Nut:
         From within the Headpiece Tuner housing, insert the plain end through the string passageway, up and over the nut, in a direction extending to the body, until the ball-end, or the like, rests within the interior recess of the housing, the string optionally clamped and then the plain end cut, secured and pitch tuned at the body.       

     Typically, the thumbwheel extension includes a connecting portion, for example, extending towards the body through the housing recess comprising a hex-portion to replace or mechanically couple to the truss rod or its adjustment cap or nut. Accordingly, turning the thumbwheel adjusts the truss rod tension to adjust relief achieving the truss rod&#39;s “initial position” established at the time of the instrument&#39;s initial setup. The connecting portion can be retractable to, at least, avoid unwanted mechanical rattles, vibrations, etc. 
     As is well known to those in the art, adjusting the truss rod can take more torque than expected at times. The Headpiece Tuner can have one or more inter-cooperative parts including a multi-function lever aspect; the radial distance from the thumbwheel&#39;s rotational centerline axis is increased by the lever compared to the knob alone, making adjustment finer and easier—in one embodiment, two designs are presented: 1) a pop-out handle element fashioned within the thumbwheel knob and 2) a removable lever-pin element, say 0.250 in diameter, inserted into a cross-bore formed in the knob, transverse to the axis of rotation, to facilitate adjustment as discussed—the removable lever-pin element can be stored, in part or in whole, in a port fashioned in the housing element, further the removable lever-pin element can extend outwardly form the housing, or fashioned, further still, into a shape, say 3.5″ wide, for hanging the headless guitar on stands built for a head or head shape as found on traditional guitars. Accordingly, when the environmental conditions or playing requirements change, and the truss rod needs attention, the player can pull the removable lever-pin element out of the housing element and insert into the thumbwheel cross-bore to easily adjust the relief on-the-fly without traditional tools. 
     Magnetic Stabilizers 
     The Magnetic Stabilizer is directed to creating or enforcing initial position for a floating tremolo. Each Magnetic Stabilizer includes magnetic elements in a combination of 1) at least one iron-based element and at least one magnetic element or 2) at least two magnetic elements, arranged in variable proximity to each other, operable to variably repel or attract, to form a variable pre-loaded force of tension. The variable pre-loaded force of tension operable to 1) exert a first magnetic force of tension to comprise the biasing element or 2) exert a second magnetic force of tension to enforce initial position otherwise established by the tremolo springs. In either application, installation options include 1) one of two magnetic elements positioned on the body, in the tremolo pocket, for example, and the other on the fulcrum tremolo, or 2) both magnetic elements are positioned on the fulcrum tremolo and moveable therewith. The body can comprise a support plate to hold a magnetic element, for example. 
     The Magnetic Stabilizer device includes an arrangement to variably adjust the proximity of each of the two magnetic elements and thereby adjust the variable force that otherwise comprises either the first magnetic force of tension as a biasing element or the second magnetic force of tension. An adjustment member or a thumbwheel element includes a holder element, including an extended portion, separate from the spring block base element, operable to be adjusted towards the tremolo pocket face and away from the base element. Further, the holder element comprising at least one Magnetic Stabilizer arrangement comprises at least one contact pin adjustably secured to the magnetic elements, for fitment in the tremolo pocket, threading the thumbwheel adjustment mechanism is operable to adjust or establish initial contact of the contact pins at initial position. 
     Stabilizer Tuners 
     In a preferred embodiment, a Magnetic Stabilizer Tuner is presented comprising an independently adjustable pre-loaded magnetic arrangement. Each Magnetic Stabilizer Tuner comprising an individual Tensioner Housing adjustably secured to recesses or ports in the main block, or preferably, the secondary spring holder extended portion. The housing being generally cylindrical, a first magnetic element within, at a first end, a support collar or guide element variably positioning a second magnetic element at a second end and an adjustment pin or extension element threadely connected to the collar within the cylindrical housing extending through formed openings in the extended portion of the secondary spring holder, operable to variably extend the adjustment pin to the tremolo pocket. The adjustment pin comprises a rounded tip often and sometimes comprises a ball bearing element. 
     The first magnetic element and the second magnetic element are variably positioned in proximity to repel each other. Threading the Tensioner Housing in the secondary spring holder element is operable to vary the proximity of the first magnetic element relative to the second magnetic element to provide an adjustable force of approximately 2˜15 pounds. A player can adjust the pre-loaded condition of the magnetic arrangement by rotating the Tensioner. Accordingly, the apparatus comprises a limited discontinuous force operable to increase the force required to pivot the fulcrum tremolo rearwardly from initial position. Since the adjustment of the forces of the internal magnetic arrangement is independent of the adjustment of the forces of the biasing element, the thumbwheel is free to be operable to re-establish initial position on the fly without altering the integrity of the finely adjusted pre-tensioned forces of the spring arrangement. 
     Another embodiment of the Magnetic Stabilizer comprising primarily an adjustment member or, alternately, a thumbwheel, threadedly connected through the spring block of a fulcrum tremolo, and moveable therewith around the tremolo pivot axis, the adjustment member extending in the direction of the strings. The adjustment member comprising a first magnetic element, connected to the spring block, is operable to adjust proximity to a second magnetic element secured within the tremolo pocket to variably enforce initial position. 
     In yet another embodiment the internal pre-loaded magnetic arrangement can be modified to provide the first variable force of tension in order to obviate the traditional tremolo springs and spring claw arrangement. 
     “Initial position” refers to the preferred adjusted position for each element of the “initial setup”—this can include, intonation, neck “relief” or truss rod adjustment, string height relative to the body and the neck, tremolo springs, etc. Accordingly, for the initial position of relief and, therefore, the position of the truss rod is determined by a balance between the force of string tension and the force of tension created by the adjusted truss rod. Further, the initial position of the fulcrum tremolo and, therefore, the position of the second critical point on the bridge elements in relation to the first critical point on the nut such that the tension of the strings, each at the intended proper pitched condition, the spring block, and the appropriately tensioned counter springs, renders a specific equilibrium point wherein the harmonic tuning for all the strings is simultaneously achieved. 
     “Headless Tuner” or “Headpiece Tuner” refers to an adjustment device added to a string musical instrument at the end of the neck to connected to the truss rod mechanism to adjust the force of tension created by the truss rod to establish the balance point of neck relief for initial position. Further the device can clamp or lock the strings at or around the nut. The Headpiece Tuner preferably employs an adjustment knob or thumbwheel element for providing continuously variable adjustment of the tension in the truss rod. The thumbwheel adjustment knob can further fashioned with a lever-like element to increase the turning radius of the thumbwheel to increase the tuning resolution and ease of use. 
     “Global Tuner” refers to an adjustment device added to a fulcrum tremolo and its associated counter spring or biasing element arrangement with the capacity to essentially re-establish the equilibrium point, created at the time of the initial setup by the tension of the counter spring(s) and the tension of the strings, in order to compensate for changes in tension requirements on the strings and/or the counter springs due to various factors. The Global Tuner preferably employs an adjustment knob or thumbwheel element for providing continuously variable adjustment of the tension in the strings by varying the relative distance between the spring attachment portion connected to the fulcrum tremolo and the attachment point of the springs to the body of the instrument. The Global Tuner thumbwheel portion provides a simple and quick means for the musician to adjust the initial position of the fulcrum tremolo in order to meet the pitch requirements in varied environmental or other situations and, in re-establishing the initial position, allows the full range of pivoting the fulcrum tremolo. 
     “Initial contact” refers to instance of an adjustment when a tuning mechanism first touches the instrument body, the tuning mechanism operable to affect initial position in a fulcrum tremolo. 
     A “hard” stop provides initial contact operable to impede rotation of the fulcrum tremolo in one direction at initial position; the “over-tightening” of the biasing element requirement to reinforce initial position obviates a global tuner. 
     “Tremolo Stop Tuner” refers to device integrated into a fulcrum tremolo spring block, moveable therewith about the tremolo pivot axis, comprising a holder element comprising an extended portion operable to either variably contact the body with the capacity to stop or block the tremolo at initial position, adjustably support a compression spring element to enforce initial position or global tune an independent stabilizer arrangement enforcing initial position. 
     A “soft” stop provides initial contact operable to affect a limited discontinuous force curve exerted on the tremolo spring block to adjustably impede rotation of the fulcrum tremolo in one direction at initial position. The adjustability obviates a stop mechanism. 
     “Initial condition” refers to the instance of an adjustment of the force operable at initial contact to complement the force of the biasing element when at initial position for a “soft” stop. 
     A “Tremolo Stabilizer” refers to a formed spring element arrangement added to the fulcrum tremolo, to make initial contact with the body with sufficient force of tension to limit the essentially linear performance of the biasing element force of tension in order to enforce initial position. Accordingly, when a force is exerted to move the tremolo out of initial position, the tremolo is subject to a restoring variable second force of tension that is borne and defined by the pre-tension stored in the spring element until the restoring force is overcome during deeper rotation or pivoting of the tremolo or disengaged at or near initial position. 
     Given sufficient focus of the discontinuous force at initial position to impede rearward tilt, the soft stop arrangement can be combined with an auxiliary quick pitch change apparatus, like the D-tuna, the Drop Tuner—McCabe U.S. patent application Ser. No. 14/880,271 (“&#39;271”) or any device with the capacity to quickly change from one adjustable predetermined pitch to another adjustable predetermined pitch and back to ensure the tremolo remains at initial position when the higher tensioned string is toggled to a lower tensioned condition. 
    
    
     
       DESCRIPTION OF THE DRAWINGS 
       In the drawings: 
         FIG. 1  is a plan view of an electric guitar embodying the present inventions. 
         FIG. 2  is a side view of the tremolo showing the Magnetic Stabilizer mechanism positioned within the spring block descending from the base plate. Two magnets in close proximity, poles variably arranged to provide a force of repulsion, comprising a variable pre-load exerted through the contact pin against the tremolo pocket face operable at initial contact to enforce initial position. The Magnetic Stabilizer pre-load complements the biasing element to create a variable “soft” stop stabilizer. Threading the adjustment element in this setup is operable to variably adjust the proximity of the two opposing magnets on axis to adjust the rate of the force of the pre-load in the context of the configuration&#39;s interdependence with elastic force of the biasing element at initial position. 
       Also shown is a dual loading/locking macro-tuner mechanism comprising an articulated extended tip of extended laver-clamp improvement to facilitate threading a string through the nose slot to pivot or lift the clamp lever for successful loading of the string from a direction opposite or distinct from the traditional direction of operation carried out from the direction the tailpiece portion securing the string to the instrument. 
         FIG. 3  is a side view of the tremolo showing a simple Magnetic Stabilizer embodiment. A first magnetic element is installed in the face of the tremolo pocket wherein a magnetic adjustment member, comprising a second magnetic element, threadedly connected to the base element, is in variable proximity to the first magnetic element in tremolo pocket, operable to exert a variable limited force operable at initial contact to enforce initial position. The second force of tension created by the opposing magnets repelling each other complements the first force of tension comprising the biasing element to create a variable “soft” stop or stabilizer. Threading the adjustment element or thumbwheel in this setup is operable to variably adjust the rate of the force of the pre-load in the context of the configuration&#39;s interdependence with force of the biasing element at initial position. 
         FIG. 4  shows a fully independent adjustable Magnetic Stabilizer, repurposing the Global Tuner thumbwheel arrangement with the extended portion to variably support and position a dual Magnetic Stabilizers that include a guide element, a fine adjustment element or extension element, a pre-loaded magnetic arrangement, the magnetic tensioner element is threadedly connected to the extended portion, positioned additionally within cooperating cavities in the main spring block. The tensioner element formed to receive a first magnetic element and guide element, a second spring positioned between the guide element and the first magnetic element, threading the tensioner element adjusts the force of tension created by the repulsion energy, twin mechanisms are used, one on each side of the center mounted thumbwheel adjustment element operable to variably enforce initial position. The fine adjustment element is theadedly secured within the guide element and operable to adjust the tip in dimensions up to more than 0.250 from the spring block to the first face for initial contact. Since threading the tensioner element is independently operable to variably adjust the rate of the force of the pre-load, this configuration benefits from the increased stability and improved acoustic coupling and frees the thumbwheel element to global tune the stabilized initial position over time. The dual Stabilizers are collectively capable of exerting a combined force of at least 8 to 10 pounds to variably ensure initial position 
         FIG. 5  shows a ¾ view of the preferred embodiment of the Headpiece Tuner improvement before being installed on the end of the headless neck. The Headpiece Tuner includes a housing for a dual loading/locking feature that includes a recess within the housing for receiving the ball end of the string or short pre-cut strings, a removable nut, adjustment port for accessing height adjustment screws [not shown]. Also shown is a thumbwheel arrangement with a portion extending towards the truss rod operable to turn the truss rod, a recess in the thumbwheel to receive the removable cross-bar, the cross-bar in a length to facilitate the headless instrument hanging from traditional instrument stands when reinstalled in the housing. 
         FIG. 6  shows a profile view of a second preferred embodiment of the Headpiece Tuner improvement on the end of the headless neck with fingerboard. The Headpiece Tuner housing mounting surface is threadedly secured to end of the headless neck by screws comprising a first position. Housing height adjustment setscrew are variably secured within ports, threading the setscrew adjusts first position, and, thereby, the removable nut to meet varied setup requirements. The Headpiece Tuner includes a housing for a dual loading/locking feature that includes a recess within the housing for receiving the ball end of the string or short pre-cut strings, string lever clamp, string passageways, a removable nut, adjustment port for accessing height adjustment screws. Threading the associated locking screw adjusts an individual pivoting lever to secure an associated string. Also shown is a thumbwheel arrangement with a connecting portion extending towards the truss rod including a recess or similar at the end of the connecting portion to mechanically couple with the truss rod or truss rod nut [not show], attachment screws and a retractable pivoting lever positioned within a recess formed in the Thumbwheel to facilitate turning the truss rod. 
         FIG. 7  shows a ¾ view of another embodiment of the Headpiece Tuner improvement before being installed on the end of the headless neck. The Headpiece Tuner includes a housing for a dual loading/locking feature as well as a recess within the housing for receiving the ball end of the string or short pre-cut strings, a removable nut, and adjustment port for accessing height adjustment screws [not shown]. A removable cross-bar is shown in a length to facilitate the headless instrument hanging from traditional instrument stands when reinstalled in the housing. 
       Also shown thru-bore extending towards the truss rod operable to allow a truss rood tool to access and adjust the truss rod. 
         FIG. 8  also shows in profile the Headpiece Tuner attached to the end of a headless neck further comprising a fingerboard. The Headpiece Tuner housing mounting surface is threadedly secured to end of the headless neck mounting shelf by screws comprising a first position. The ball end is shown within a recess with the housing extending though string passageway under the clamping arrangement, over the removable nut and suspend over the fingerboard extending towards the body [not shown]. 
         FIG. 9  shows a top mounted tremolo in ¾ view comprising macro-tuners forming second intonation point, the tremolo further comprising a magnetic stabilization apparatus arranged on the tremolo, a first magnetic element mount variably secures a first magnetic element within the adjustment housing threadedly secured to base plate; threading the adjustment housing is operable to vary proximity of the first magnetic element to a second magnetic element secured to support plate  26  [secured to the body  3  not shown] to enforce initial position. 
         FIG. 10A  is similar to  FIG. 8 , showing a profile view of the Headpiece Tuner, in an alternate embodiment of string clamps. The Headpiece Tuner housing mounting surface is threadedly secured to end of the neck mounting shelf by screws comprising a first position. Housing height adjustment setscrew are variably secured within ports, threading the setscrew adjusts first position, and, thereby, the removable nut to meet varied setup requirements. The string is shown extended from the body [not shown] over the end of the neck and into a recess/string passageway area. One of the pivoting multi-function string clamps is in an open or unlocked position to show both the associated contact surface of the housing formed to receive the string contact portion and the cutting surface of the housing formed to receive the string cutting portion. Pivoting the multi-function string clamp to a closed position will both clamp and cut the associated string—see  FIG. 10B . Further, a setscrew in the housing is adjustable to variably contact the end of the neck. Threading the setscrew adjusts the position of the housing and nut relative to the end of the neck. 
         FIG. 10B  is similar to  FIG. 7 , showing a ¾ view of the Headpiece Tuner, in an alternate embodiment of string clamps. The Headpiece Tuner housing mounting surface is threadedly secured to end of the headless neck mounting shelf by screws comprising a first position. Shown is one of the pivoting multi-function string clamps in an closed or locked position [one multi-function string clamp removed for illustration] to show the string clamped between the associated contact surface of the housing formed to receive the string contact portion and the cut end of the string after the string cutting portion is positioned in the cutting surface of the housing. A pin shown for the individual levers assembled in the housing. 
     
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     In  FIG. 1 , an electric guitar  1  is illustrated comprising Headpiece Tuner  2  at one end, a body  3  at the other end, with neck  4  extending between head  2  and body  3 . Six of each string  6  extends from Headpiece Tuner  2  to body  3  over neck  4 . Neck  4  forms fret board or fingerboard  5  for guitar  1 . At Headpiece Tuner  2 , each string  6  extends over nut  7  forming first critical point  8  for each string  6  and is secured. Nut  7  is located at the transition of neck  4  to head  2 . Headpiece Tuner  2  includes Truss Rod Thumbwheel  9 . On body  3 , strings  6  are secured to fulcrum tremolo  10 . Fulcrum tremolo  10  has arm  11  for pivoting tremolo  10  to provide the vibrato effect on the strings. Fulcrum tremolo  10  has six intonation modules  12 , one for each string  6 . By manipulating tremolo arm  11 , the entire fulcrum tremolo  10 , not including the riser posts and inserts (and in varied designs, related bearing assembly elements), can be pivoted to achieve the desired tremolo effect. 
     Intonation module  12 , shown as a macro-tuner, incorporating the function of bridge or saddle and tailpiece elements, is provided to support string  6 . Intonation module  12  is slideably adjustable on base plate  13  to adjust the relative distance between first critical point  8  and second critical point  16  ( FIG. 2 ) to intonate the associated string. Fulcrum tremolo  10  comprises a second critical point  16 , one for each string  6 , sometimes characterized as an intonation point, witness point or bridge point. 
     The invention is shown for on electric guitar  1  with six strings  6  and it should be understood that the invention could be used on a variety of stringed musical instruments. In body  3  of guitar  1  there are electric pickups shown without numbers. In the following description, fulcrum tremolo  10  will be described in greater detail. 
       FIG. 2  displays fulcrum tremolo  10  at initial position in a partial cross-section side view showing body  3 . Electric guitar  1  further comprising tremolo pocket  28  and tremolo spring pocket  29 , Magnetic Stabilizer  50  and locking macro-tuner  12  comprising bridge element  17 , an tailpiece comprising tuning pin  15  variably positioned by tuner knob  14  to alter the tension of string  6  secured to Headpiece Tuner  2  (not shown). Second critical point  16  is located on intonation module  12 . String contact point  16  on bridge element  17 . The leading-edge portion of base plate  13  adjustably supports tremolo  10  pivotally relative to body  3 . Spring block  21  is connected to base plate  13 . 
     Magnetic adjustment element  51  threadedly connected to spring block  21  including first magnetic element magnet  53 , positioned within element  51  in proximity to, operable to variably repel, second magnetic element  54  urging guide  52  towards tremolo pocket face  25 . Guide  52  threadedly receiving contact pin  55  extending to initial contact  29  on tremolo pocket face  25 . The opposing magnetic force will exert a second variable force of tension through guide  52  and contact pin  55  against tremolo pocket face  25  operable at initial contact  29  to enforce initial position. Threading adjustment element  51  varies the proximity of the first magnetic element  53  to second magnetic element  54  to vary second variable force of tension or the pre-load held by contact pin  55  at initial position. 
       FIG. 3  shows fulcrum tremolo  10  at initial position in a partial cross-section side view showing body  3 . Electric guitar  1  further comprising tremolo spring pocket  28  and tremolo pocket  29 , Magnetic Stabilizer  50  and locking macro-tuner  12  comprising bridge element  17 , an associated tailpiece comprising tuning pin  15  variably positioned by tuner knob  14  to alter the tension of string  6  secured to Headpiece Tuner  2  (not shown). Second critical point  16  is located on intonation module  12 . String contact point  16  on bridge element  17 . The leading-edge portion of base plate  13  adjustably supports tremolo  10  pivotally relative to body  3 . 
     Tremolo  10  illustrates a side view including main block  21  connected to base plate  13 , biasing element  19  is shown connected to main block  21 . Pin  51   a  comprising first magnetic element  53  threadedly connected to main block  21 . Body  3  further comprises second magnetic element  54 . Threading pin  51  will vary proximity of first magnetic element  53  to second magnetic element  54 , magnetic poles arranged to repel, in order to exert a second force of tension comprising a variable magnetic pre-load operable to enforce initial position without contact between the first and second magnetic elements. 
       FIG. 4  shows an alternate improved Magnetic Stabilizer  50 , adapted to extended portion  23  of spring holder  22 , further comprising threaded tensioner housing  51 , guide element  52 , fine adjustment element  55  threadedly connected to guide element  52  extending through first magnetic element  53  and second magnetic element  54 . 
     Each magnetic stabilizer mechanism  50 , holding a second variable force of tension collectively, at least 2˜10 pounds force, the second force of tension less than the first force of tension created by a biasing element or tremolo springs, fine adjustment element  55  positioned to make initial contact with tremolo pocket contact area  29 , tremolo  10  at initial position. Tremolo Stabilizer  50  magnetic pre-loaded second variable force of tension to increase the force required to pivot fulcrum tremolo  10  from initial position rearwardly. 
     Tremolo Stabilizer  50  adapts spring holder  22  extended portion  23  to receive tensioner housing  51 . Tremolo Stabilizer  50  further comprising guide element  52 , first magnetic element  53 , second magnetic element  54  and fine adjustment element  55 , extending through first magnetic element  53  within tensioner housing  51  and cooperating spring block  21  cavity  57 . Magnetic pre-load to exert a second variable force of tension, at least 2˜10 pounds force, comprises the second force of tension less than the first force of tension, pin  55  to make initial contact with tremolo pocket contact area  29  [not shown]. Tremolo Stabilizer  50  combined second variable force of tension to increase the force required to pivot fulcrum tremolo  10  from initial position rearwardly. Threading magnetic tensioner housing  51  is operable to adjust the magnetic pre-load created by the first and second magnetic elements in proximity. Threading the thumbwheel  24  is operable adjust the position of spring holder  22  and, thereby, and the collective second variable force of tension. 
       FIG. 5  shows a ¾ view of the preferred embodiment of Headpiece Tuner  40  improvement [before being installed on the end of the headless neck  4 —not shown]. Headpiece Tuner  40  includes housing  41  including an extended side  63 , dual loading/locking access ports  46  and recess  48  within housing  41  for receiving ball end  66  of string  6  or short pre-cut strings [not shown], removable nut  42 , adjustment port  38  for accessing height adjustment screws [not shown]. Removable cross-bar  44  is shown positioned in housing  31  recess  64 . Also shown is thumbwheel  45  arrangement with connecting portion  60 , recess  65  in thumbwheel  43  to receive removable cross-bar  44 , cross-bar  44  in a length to facilitate headless instrument  1  hanging from traditional instrument stands [not shown]. 
       FIG. 6  shows a profile view of a second preferred embodiment of Headpiece Tuner  40  on end  79  of the neck  4  with fingerboard  5 . Headpiece Tuner  40  housing mounting surface  84  is threadedly secured to end  79  mounting shelf  83  by screws  71  comprising a first position. Housing height adjustment setscrew  39  variably secured within ports  38 , threading the setscrew adjusts first position, and, thereby, removable nut  42  to meet varied setup requirements. Headpiece Tuner  40  includes housing  41  for a dual loading/locking feature that includes recess  48  within housing  41  for receiving ball end  66  of string  6  [not shown—see  FIG. 8 ] or short pre-cut string ends  67 , string clamp screw  46 , clamp lever  47 , string passageway  45 , removable nut  42 , adjustment port  38  for accessing height adjustment screw  39 . Clamping lever  47  comprising clamp surface  47   a  and clamp pivot pin  47   b . Threading clamp screw  46  positions clamping lever  47  to secure string  6  to Headpiece Tuner  40 . Also shown is a thumbwheel  43  arrangement with connecting portion  60  extending towards truss rod  70  including formed portion recess  61  or similar at the end of connecting portion  60  to mechanically couple with truss rod  70  or truss rod nut [not show] and a retractable pivoting lever  68  positioned within recess  69  formed in thumbwheel  43  to facilitate turning truss rod  70 . 
       FIG. 7  shows a ¾ view of another embodiment of Headpiece Tuner  40  improvement before being installed on the end of the neck. Headpiece Tuner  40  includes housing  41  for a dual loading/locking feature  46  as well as recess  48  within housing  41  for receiving ball end  66  of the string  6  or a short pre-cut string  67  [not shown], removable nut  42 , and adjustment port  38  for accessing height adjustment screws  39  [not shown]. Removable cross-bar  44  is shown in a length to facilitate headless instrument  1  hanging from traditional instrument stands [not shown]. Also shown thru-bore  49  extending towards truss rod  70  [not shown] operable to allow a truss rood tool to access and adjust truss rod  70 . 
       FIG. 8  also shows in profile Headpiece Tuner  40  connecting end  82  attached to neck  4  further comprising a fingerboard  5 . Headpiece Tuner  40  housing mounting surface  84  is threadedly secured to mounting shelf  83 , opposite plain side  85  by screws [not shown] comprising a first position. Ball end  66  of strings  6  are shown within recess  48  extending though string passageway  45  under the clamping arrangement  46  and  47 , over removable nut  42  and string  6  suspended over the fingerboard  5  extending towards body  3  [not shown]. Cross-bar  44  is shown held in recess  64  of housing  41 . 
       FIG. 9  shows a top mounted tremolo  10  in ¾ view comprising macro-tuners  12  forming second intonation point  16 , tremolo  10  comprising a magnetic stabilization apparatus  50  on the tremolo base plate  13 , first magnetic element mount  55  variably secures first magnetic element  53  within adjustment housing  51  operable to vary proximity to second magnetic element  54  secured to support plate  26  [connected to the body  3  not shown] to enforce initial position. 
       FIG. 10  A is similar to  FIG. 8 , showing a profile view of Headpiece Tuner  40  with alternate embodiment of multi-function string clamp  70 . Headpiece Tuner  40  housing mounting surface  84  is threadedly secured to end  82  mounting shelf  83  by screws  81  comprising a first position. Housing height adjustment setscrew  39  variably secured within ports  38 , threading the setscrew adjusts first position, and, thereby, removable nut  45  to meet varied setup requirements. String  6  is shown extended from body  3  [not shown] over end of the neck  4  and into a recess/string passageway area  74 . Pivoting multi-function string clamp  70  is shown in an open or unlocked position to reveal both associated contact surface  76  of housing  40  formed to receive string contact portion  75  and cutting surface  78  formed to cooperate with string cutting portion  77  to cut associated string  6 . Multi-function string clamp  70  is further formed with slot  44   a  that allows lever  70  to variably pivot on support cross-pin  44  and adjust for various gages of string thicknesses, etc. A corresponding setscrew  44   b  limits the variability to ensure the associated clamp secures the associated string in various dimensions when pivoting multi-function string clamp  70  is pivoted into a closed position to both clamp and cut associated string  6 —see  FIG. 10B . Further, setscrew  39  in housing  40  is adjustable to variably position the connecting end of the housing relative to the end of the neck  4 . Threading setscrew  39  adjusts the position of housing  40  and nut  42  relative to the end of the neck  4 . Typically the housing mounting screws that extend through the neck are loosened prior to the adjustment and subsequently retightened. 
       FIG. 10  B is similar to  FIG. 7 , showing a ¾ view of the Headpiece Tuner  40 , in an alternate embodiment of string clamp  70 . Headpiece Tuner  40  housing mounting surface  84  is threadedly secured to end  82  mounting shelf  83  by screws  81  comprising a first position. Pivoting multi-function string clamp  70  shown in both a closed or locked position [one multi-function string clamp  70  removed for illustration] and the remaining individual pivoting multi-function string clamp  70  to show string  6  clamped between associated contact surface  76  and string contact portion  75  and the end of string  6  cut after string cutting portion  77  is positioned into cutting surface  78 . Pin  44  pivotally supports individual levers  70  assembled in housing  40 . 
     The various features of novelty, which characterize the invention, are intended to improve the upward spiral of Light and are pointed out with particularity in the claims annexed to and forming a part of this disclosure. For a better understanding of the invention, its operating advantages and specific objects attained by its use, reference should be had by the accompanying drawings and descriptive matter in which there are illustrations and described preferred embodiments of the invention. 
     While specific embodiments of the invention have been shown and described in detail to illustrate the application of the inventive principles, it will be understood that the invention may be embodied otherwise without departing from such principles.