BRPI0720458A2 - FOLDING GUITAR WITH SELF-ALIGNING, JOINT BOX, AND METHOD FOR MANUFACTURING A FOLDING GUITAR - Google Patents

Description

I “FOLDING GUITAR WITH SELF ALIGNMENT, JOINT, GUITAR BOX, AND METHOD FOR MANUFACTURING A FOLDING GUITAR”

TECHNICAL FIELD

The invention relates to a folding guitar with a

position locking mechanism.

BACKGROUND OF THE INVENTION

The manufacture of acoustic musical instruments began as a search for the mechanical equivalent of the human voice. This indeed continued the pattern in the middle ages and into the late Renaissance and early modern period.

Stringed instruments have been known since ancient times. These included instruments such as the lute, a guitar-like instrument with a speaker and neck. A bronze in the New 15 Empire (Ancient Egypt, 1380 BC) in the collection of .... of Art represents a Nubian dancing raised on her toes with one knee raised, her left hand up working on an instrument arm and the right hand tanging the strings in a pose that can be illustrative of a modern rock music.

But the lute has a much more ancient history, perhaps

from the western Semitic nomadic people who brought the instrument to Mesopotamia, where the archaeological record includes representations dating from the Acadian period (2,350 to 2,170 BC), being introduced into Egypt perhaps at the end of the Hyksos dynasty of the Middle Empire (dynasty XV to XVII). , 1730 to 1580 BC).

In recent times, lute string musical instruments remain among the most popular instruments. Popular artists across the United States have used the guitar, sometimes one of the artisan variety, in a wide range of music genres, including blues, popular roots music and so on. Unlike percussion instruments, the need for amplification of relatively weak string sounds, reeds, and vibrant human lips presented challenges for early musical instrument manufacturers. There is a demanding standard in instrument stability if high quality sound is to be produced.

In addition, for years, artists who play acoustic stringed instruments have introduced a wide variety of techniques to play the music around these instruments. While, perhaps, the ancient peoples only twisted the lute strings to achieve a gradually fading musical tone, later artists used a bow to produce notes of relatively constant amplitude and to some extent controllable. Modern artists employ a variety of techniques in their presentations. Acoustic blues presenters can quickly strike their instruments with their fingertips, palms or knuckles. Certain violin compositions, typically played by sliding a bundle of ponytail strings into the strings, also require the strings to be tangled. This also results in greater demands being placed on the mechanical stability of the instrument.

Given the popularity of musical instruments, especially the guitar, people often carry them with them while traveling. However, they are bulky and poorly suited for convenient transportation. They probably do not fit into aircraft carry-on storage spaces or under seats. In response to this need, folding neck guitars have been proposed. See, for example, my previous United States patent number 516,114, and my previous copending patent application US 11 / 640,095, filed December 15, 2006. Although this instrument is effective, it is difficult to do expressive manual work and fine tuning. required. Thus, there is a need for a stringed instrument that can be a guitar, violin or the like and that is easy to use during a performance, consistent and accurate in translating artistic performances into an acoustic or any other and easily transportable. . The structure disclosed herein is believed to be a more effective solution in providing a highly mobile instrument that can be accommodated within a range of user preferences.

This invention also relates to hinges, and particularly to what is commonly known as invisible hinges 10 for use in relation to doors and other hinged articles, and the invention described herein is an improvement of prior use specific designs where a very narrow surface is available. for the articulation mechanism, and the articulation must be capable of supporting a proportionally much larger perpendicular surface. Also significant in this invention is the method used to locate and install the joints.

In this type of joint, the joint ends are connected by pivotal joints hinged to a pivot pin and sliding into sliding pins, the joints being in cavities or compartments within the pivot parts, ie the pivot plates or plates end An earlier version of such joints is a joint design created by Joseph Soss that bears his name. It is illustrated in several patents, including United States patents 1,030,936, 1,484,093, 1,688,996, 1,984,092, and 2,178,271, among others. Such a joint is employed in the above-mentioned design patent.

These joints are designed to be invisible when in the

closed position and allow the focal point of the hinge to be below the surface when in the closed position and then extend beyond the surface to allow a full 180 degree aperture. The two basic versions of the joint are common, the first having a long narrow body with two attachment bolts, one located at each end. This type is in a way that requires a multilevel mallet cut for installation, the second is a barrel or cylinder joint with a side-mounted screw as a means of attachment and requires a hole to be drilled for installation.

These earlier designs are of a similar nature, but both do not have the necessary clearance, have attachment methods that are both insufficient and impractical on a guitar with a folding neck, and also require a complex process to create the openings for the plates or drums. of the joint tips.

In addition, while a prior design version has been shown to support this application to some extent in US design patent cited D516.114, it has been found that several areas are lacking in actual production beyond the assembly shop. manual and small.

First, these joints, known as "barrel joints", require that a final outer surface, an example being a scale on musical instruments, be attached out of sequence with normal production procedure and requires that holes 20 be extremely close to the surface. scale, weakening this vital structural element.

Second, these joints are very difficult to adjust precisely for depth and alignment. The other version of the Soss joint has a better fastening means and better control of location and depth. However, this design allows only a single joint to be mounted in the required area that lacks structural integrity for this application and lacks sufficient capacity to properly align the two articulated parts. In addition, the location of the fastening screws is very close to the outer edges of the elements, which in this application creates problems due to the lack of material for the fastening screws. Currently available versions also do not have the opening clearance required for guitar joint application. Finally, the means required to cut the mortise are very time consuming and difficult to obtain consistently.

SUMMARY OF THE INVENTION

According to the invention, a stringed instrument comprises a primary arm extension member with an arm extension securing end and a tuning assembly support head end, an extension top and an extending length. between the ends. The primary arm extension element defines a cropped arm extension volume configured to receive a pivot tip. The arm extension cutout volume extends open at the arm extension securing end and open at the top of the arm extension primary member. A primary arm base member has an arm base retaining end, a base top, and an opposite end. The primary armrest element is made to define a cut-out armrest volume configured to receive a pivot tip. The cut-out volume 20 of the arm base extends open at the arm base retaining end and open at the top of the arm base primary element. One pivot has a first pivot tip positioned at the jagged volume of the arm extension and a second pivot tip positioned at the jagged volume of the arm base. A portion of the arm scale is attached to the open top of the jagged arm extension volume and rests on the first tip of the pivot. A base cap attaches to the open top of the clipped arm base volume and rests on the second pivot tip. A main body of the stringed instrument is attached to the primary element of the arm base. Two or more Soss pivot assemblies are connected to a single pair of pivot ends, with each part defining a pair of Soss pivot link receiving tracks to form a pair of separate Soss pivot assemblies at the single pair of pivots. of the joint.

The pivot ends each define a setscrew receiving hole oriented to extend the length of the string instrument arm.

The primary arm extension member is provided with a mounting for a bolt and the primary arm base element defines a hole for receiving that bolt. This allows the primary arm base element and the primary arm extension element to be locked in the touching position.

The inventive pivot comprises a first pivot tip defining a pair of first and second tracks for receiving a Soss sliding pivot pin. A second pivot tip defines a third and fourth track pair for receiving a second Soss sliding pivot pin. A first Soss pivot assembly is mounted between and in the first and third raceways. A second Soss pivot assembly is mounted between the second and fourth raceways, and therein the second Soss pivot assembly being positioned adjacent and spaced from and extending in the same direction as the first Soss pivot assembly.

According to the preferred embodiment, the first pivot tip defines a hole between the first and second raceways. The second pivot tip defines a hole between the third and fourth raceways. The hole is oriented to receive an attachment element to propel and attach the joint into an element to be pivotally mounted.

The pivot tips may be of rectangular configuration with flat sides and round corners, or flat sides and, for example, substantially 90 ° pointed corners.

The hole between the first and second lanes may be aligned substantially in the same direction as the lanes.

According to the invention, the better alignment provided by the improved articulation is further improved by the self-aligning locking mechanism provided in accordance with the present invention. Such a mechanism may be a screw or bayonet fitting.

According to the invention, a self-aligning folding guitar comprises an arm part and a body part. The joint is mounted on the arm part and the body part. A first alignment element is secured to the arm portion. A second alignment element is secured to the body part, the second alignment element finding the first alignment element in a substantially fixed position. A fastener secures the first alignment member to the second alignment member.

The first alignment element may include a conical surface.

The first and second alignment elements may form surfaces that fit together.

The fastener is a threaded element.

The fastener may be a screw or bayonet.

Advantageously, the first alignment element may define an elongated hole for receiving the fastening element.

The first alignment element may comprise a tube-like element with an internal thread and a frustoconical pin which is screwed into the tube-like element.

The second alignment element may comprise a solid body with a receiving volume that matches the frustoconical pin, and further defines a threaded hole for receiving the fastener.

According to the invention, a box that can accommodate a folded guitar, whether it is in the folded or unfolded playing position, is provided.

The inventive guitar case comprises a guitar body receiving part, a guitar body part cover and an upper arm part box. An arm portion housing base and an arm portion housing side wall are additionally provided. A zipper part of the top arm secures the top of the arm part box to the side wall of the arm part box. A zipper part of the lower arm secures the base of the arm part box to the side wall of the arm part box. A portion of the zipper secures the guitar body part cover to the guitar body receiving box part.

BRIEF DESCRIPTION OF DRAWINGS

The operation of the invention will be apparent from the following description taken in conjunction with the drawings, in which:

Figure 1 is a schematic side view illustrating the male element of the self-aligning mechanism of the present invention;

Figure 2 is a plan view of the bolt receiving hole in the element of Figure 1;

Figure 3 illustrates the locking screw used in accordance with the present invention;

Figure 4 illustrates the female element of the self-aligning mechanism of the present invention;

Figure 5 illustrates the male and female elements installed on a guitar or other stringed instrument in the open configuration;

Fig. 6 is a side view similar to Fig. 5 illustrating the alignment operation; Fig. 7 is a side view similar to Fig. 6, showing the guitar arm in the playing position; and

Figure 8 is a view similar to Figure 7 showing the guitar arm locked in the playing position;

Figure 9 illustrates an alternative locking element;

Fig. 10 illustrates an alternative embodiment of a female element according to the present invention for receiving the alternative locking element of Fig. 9;

Figure 11 is a view along lines 11-11 of Figure

10;

Figure 12 illustrates the alternative embodiment of the female element of the present invention in the lock position;

Figure 13 illustrates the inventive locking mechanism installed

on a guitar;

Figure 14 is a perspective view of a joint

which can be used with the locking mechanism of the present invention;

Fig. 15 is a perspective view of the hinge of Fig. 9 in the closed position from the base;

Figure 16 is a perspective view of the articulation of the

Figure 9 from the top;

Figure 17 is a view similar to Figure 9 of another alternative pivot design;

Figure 18 is a view similar to Figure 10 of the joint

illustrated in figure 12;

Figure 19 illustrates the articulation of figures 12 and 13 in use;

Figure 20 is a perspective view of the hinge installed and in the open position;

Fig. 21 is an exploded perspective view of an alternative embodiment for the inventive travel-cut musical instrument;

Figure 22 illustrates the inventive instrument with the arm

folded up;

Figure 23 illustrates an alternative embodiment with a block

protruding jump;

Figure 24 is a top plan view of a guitar case constructed in accordance with the present invention;

Fig. 25 is a view along lines 25-25 of Fig. 24;

Figure 26 is a view similar to Figure 25 showing a

first step in opening the inventive guitar case;

Fig. 27 shows another step in opening a guitar case according to the present invention;

Figure 28 illustrates another step in opening the housing.

inventive guitar;

Figure 29 illustrates the next step in opening the inventive guitar case;

Figure 30 illustrates an additional step in opening the inventive guitar case;

Figure 31 illustrates the inventive guitar case in position

opened with the upper arm guard unfolded for illustrative purposes;

Figure 32 is a side view of an alternative embodiment of a guitar case according to the present invention;

Figure 33 is a top plan view of the guitar case

inventive illustrated in Fig. 32;

Figure 34 is a side plan view illustrating the opening of the guitar case according to the present invention;

Fig. 35 illustrates a next step in opening the inventive guitar case;

Figure 36 illustrates the top opening of the body take-back part of the inventive guitar case;

Figure 37 illustrates the inventive guitar case in the configuration

open; and

Fig. 38 illustrates a folding guitar with which the inventive guitar case can be used.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Referring to Figure 1, the arm 12 of a folding guitar 10 is provided with a male alignment member 15. An alignment member 15 comprises an anchor member 17 which is screwed into the threaded hole 19. The anchor member 17 includes a head 21 and an integral threaded tubular member 23.

Alignment member 15 further comprises an elongate tube 25 including an upper flange 27. Flange 27 defines an elongate hole 29. Hole 29 receives a screw 31 (FIG. 2) which includes a frictionally retained retaining washer 33, as shown in FIG. will be described in detail below.

A matched female member 35, illustrated in FIG. 4, is mounted to the body 14 of the guitar, which passes through a support block 50 of the curved section 26. A bolt 37 passes through the block 50 to mate with the female element 35. The element The female 35 includes a receiving cone 39 which receives and matches the head 21 for securely locking the arm 12 with respect to the body 14 of the guitar.

As shown in figure 5, arm 12 is mounted on body 14

during use, the arm 12 is pivoted toward the body 14 from the position shown in figure 5 to the position shown in figure 6. Because of normal wear or tolerances in the joint 48, there may be a certain misalignment as illustrated in FIG. 6. Such misalignment is addressed by engaging surface 41 by surface 43 during the advance of arm 12 from the position shown in FIG. 5 to the position illustrated in FIG. 6 and then to the position illustrated in FIG. 7. .

Misalignment does not affect the ability to screw screw 31 into hole 49 because elongated hole 29 allows proper alignment of screw 31 with hole 49.

Once the guitar has been placed in the configuration shown in figure 7, the screw 31 can be tightened to assume the position shown in figure 8.

Referring to FIG. 9, a bayonet 131 with a retaining washer 133 and an arm 134 may be used in place of bolt 31. As shown in FIGS. 10-11, a ramp 136 is engaged by bayonet arm 138. A ramp 136 as the shallow side 140 and a high side 141. During use, the arm 138 engages the shallow side 140 after passing through the notch 144, and is rotated to the high side 142 to be firmly locked in position as illustrated in figure 12.

Referring to Figure 13, a musical instrument constructed in accordance with the present invention is illustrated in which the self-aligning structures of the present invention are employed. Although the invention may be employed with respect to acoustic or electric guitars, violins, violas, basses, banjos and other stringed instruments, for illustration purposes, an acoustic guitar is illustrated 10.

In general, the guitar 10 comprises a large hollow body 12, attached to the inventive arm 14. The arm 14 comprises a head 16, which accommodates tuning tuners 18 in a conventional manner.

The body 12 comprises the upper plate 20 which defines an acoustic hole 22. The lower plate 24 is secured to the upper plate 20 by curved sections 26 and 28 which together form a side wall of the acoustic upper and lower end acoustic guitar housing. U at the heel and tail ends of the body 12, and a curved central section 30 and a curved central section 32 (not shown) that form the waist of the instrument.

Arm 14 supports an arm scale 34, which is glued to arm 14. Arm scale 34 supports a plurality of frets 36. Arm base 5 supports arm scale 40, which is glued to arm base. arm 38. The base scale of arm 40 supports a plurality of frets 42 against which strings 44 are touched. For the sake of illustration, strings 44, which are supported by easel 46, are shown partially and in dashed lines. The guitar neck 14 can be bent 10 by rotating in the direction of the arrow 47.

A preferred embodiment of a hinge 448 for use with the self-aligning mechanism of the present invention is illustrated in Figures 14-16. The pivot 448 comprises Soss pivot assemblies 449, which comprise pivot connections 468, pivot pins 470, 15 pivot pins 472, and pins 478. Operation of this pivot is similar to other Soss joints. However, advantages are provided by the placement of a screw hole 476 which, by virtue of being close to the side 477 of pivot 448, supports a screw which is threaded, for example, into the arm at a point where there is sufficient wood at all times. screw sides 20 for excellent support. At the same time, sidewalls 479 have a relatively small thickness 481 which provides an extra thickness available for Soss 449 pivot assemblies. Inclined grooves 474 cooperate in providing the configuration required to allow use of the pivot on a guitar with a pivot arm.

In addition, compactness and strength are provided by

thin receiving recesses 481, which allow relatively large heads of robust pins 470 to be seated.

According to a particularly preferred embodiment of the invention, it has been found that a small version of the joint illustrated in figures 17-18 is relatively advantageous. Hinge 548 is of similar construction as hinge 448. Part of the advantage of this construction can be seen in Figure 19, where the shallower hinge tip causes a smaller lever arm to act through bolt 583 to reduce the integrity of hole 585. on which the bolt 583 is seated, thus promoting the long term stability of the guitar body 512 and the guitar arm 514.

According to a preferred embodiment, hinge 548 includes sidewalls 579 with a thickness 585 of approximately 0.25 cm. The thickness 587 of the joints is also 0.25 cm. The sidewalls 579 have a height 589 of 2 cm and a length 591 of 2 cm. The sidewalls 579 have a length 593 of 2 cm. Similarly according to a preferred embodiment, hinge 548 has a width 595 of 4 cm.

Referring to figures 24-31, the inventive guitar case 810 comprises a top cap of the main body 812. The base of the main body part 814 may be joined to the top cap 812 by a zipper 816. A handle 18 is attached to base 814.

The upper arm cover 820 is also secured by a zipper 816. A lower arm cover 822 is secured by a zipper 824. The guitar case 810 also includes a side portion of the arm 826.

If you wish to open the inventive box 810, the upper arm cover 820 opens and locks in firmly holding the zipper pull tab 828 and extending it to the 830 point. The zipper pull tab 832 advances to the point. 834. This allows the inventive guitar case to be placed in a position with its top cover 812 open, as illustrated in Figure 8.

If desired, the zipper pull tab 832 may move from the position shown in the dashed lines in figure 26 to point 834. Similarly, pull tab 828 may be set at a point 830. This allows the top cap of the the arm 820 is raised as shown in figure 26. The top cap 820 can then be folded in the direction of the arrow 836 to overlap the top face 838 of the guitar case and bring the hook fastener 840 into contact and snap into the connector. loop type 842 illustrated in Figure 28.

According to the preferred embodiment, the pull tabs

zippers 828 and 832 can move in either direction. Similarly, the hook connector 844 may be contacted with the loop connector 846 after the zipper 824 has been opened, causing the arm side portion 826 to be flat, as shown in Figure 29. After If the side portion of the arm 826 has been set to the flat position shown in FIG. 29, the lower arm cover 822 may be urged to assume the position illustrated in FIG. 29 by engaging the hook material 848 with the loop material 850. Alternatively, the hook material 852 may be provided to engage the loop material 854.

Providing a separate zipper for the upper arm cover

820, the inventive guitar case 810 may be placed in the configuration illustrated in Figure 30.

Still another alternative embodiment of the inventive guitar case is illustrated in Figures 32-37. In this embodiment, the guitar case 910 is provided with a central zipper, or combination of zippers 924 and 926, which allow the inventive guitar case to assume numerous configurations. For example, it can be completely closed and adapted to receive a conventional guitar or a folding guitar in the playing position, as illustrated in figures 32 and 33.

It can also be opened so that it can be put

in a configuration suitable for an opening-folded guitar as shown in figures 34 and 35, when a guitar 956 is contained in the case it can be opened as shown in figure 36. Zipper pull tabs 958, 960 and 962 they can be opened to make the case 110 assume the position shown in figure 37, allowing the guitar to be placed or removed from the case.

As illustrated in Fig. 38, a dashed guitar 1010 capable of having its arm 1014 bent upwards in the direction of arrow 1018 is shown in dashed lines. Such action may be continued until the arm assumes the position illustrated in 1014a in Fig. 38; and the wedge arm 1014a overlaps the body of the guitar 1012.

According to the present invention, it is contemplated that a guitar in the position illustrated in full lines in figure 38 may be placed in the inventive guitar case 810 when it is in the position shown in figure 24. Similarly, when in the playing position, a guitar will also fit into the inventive guitar case 910 illustrated in figures 32 and 33.

When the guitar is fully folded, with its arm in the position illustrated in 1014a, it fits into the guitar case when the guitar case 15 is placed in the position shown in Figure 29. Similarly, a folded guitar like this can be placed in the box shown in figures 32-37 by opening the arm zippers and folding the upper and lower arm guards and the side wall of the arm to positions analogous to those illustrated in figure 29, and secured by the use of hook and loop fasteners.

According to the invention, it is contemplated that zippers in

all modalities by two-way zippers for added functionality.

Figure 20 shows the hinge installed and in the folded position, and shows how hinge end plates 61 and 63 of hinge 48 cancel into cavities 50 and 52 and how attachment screws 56 and 58 are positioned in the assembled frame According to the final invention it is contemplated that the cavities 50 and 52 are cut in the arm 14 and block 50 in the guitar body 12 before gluing the scales 34 and 40 in place. The arm 14, arm base 38, arm scale 34 and main body scale 40 are illustrated in the storage or travel position of the musical instrument arm. The inventive hinge may be suitable for other applications where a very narrow surface is available for the hinge mechanism and should be able to support a proportionally much larger perpendicular surface.

Referring to figure 13, when the arm 14 is positioned relative to the body of the guitar 12 in the open or playing position as a result of the movement of the fully folded position in figure 5 by the position shown in figure 19 and to the position shown In Figure 13, the guitar can be conveniently played after fixing the screw 31.

Referring to Figure 21, alternative embodiments of the invention may be understood. A guitar 510 comprising a guitar body 512 has a continuous sidewall curved section defining a notch 584 which receives the hinge 548. A portion 582 of the sidewall 515 is thus pressed between the heel block 538 and the arm 514. Screw 531 holds arm 514 in the touching position, for example, as in the embodiment of figures 1-8.

In the case where a particularly rigid arm attachment is desired, a portion 584 of the heel block 538 may alternatively extend along the side wall 515 which is cut to match part 584. The result is that the heel block is leveled. with the side wall.

Still another alternative embodiment of the inventive guitar 610 comprising a guitar body 612 and a guitar arm 614 is illustrated in Figure 22 in the folded or travel position. In this embodiment, the arm 614 bends at a break point 690 which coincides with the break point at which the pivot screws 661 and 663 join within the side wall 615, each as illustrated in Figure 22. The result is extra support for arm 614 by sidewalls 692.

Referring to Fig. 23, a guitar 710 incorporating a above-mentioned protruding jump block 738 is described.

According to the invention, it is contemplated that although the guitar neck will be bent downwards, the strings of the guitar will be inserted into the hole and body of the guitar. It is also contemplated that inventive structures 5 may be applied to a solid body guitar such as an electric guitar. In this case, the hole that in the acoustic guitar goes to the body of the acoustic guitar does not exist. Thus, there is limited space for the strings. According to the present invention, it is contemplated that a notch or socket, or cylindrical or spherical volume, may be made in the solid guitar to make room for stringing. Alternatively, a hole with a diameter of, for example, five centimeters may be drilled into the guitar. The guitar strings can be threaded through this hole, allowing them to be laid flat against the back side of the guitar.

Although alternative embodiments of the invention have been described, it is certainly to be understood that various modifications will be apparent to those skilled in the art. Such modifications are in accordance with the spirit and scope of the invention, illustrated and defined only by the appended claims.

Claims (33)

1. Self-aligning folding guitar, characterized in that it comprises: (a) a part of the arm; (b) a body part; (c) a joint mounted on said arm part and said body part; (d) a first alignment member secured to said arm portion; (e) a second alignment member attached to said body part; said second alignment member meeting said first alignment member in a substantially fixed position; and (f) a securing member for securing said first alignment member to said second alignment member. Guitar according to claim 1, characterized in that said first alignment element includes a conical surface. Guitar according to claim 1, characterized in that said first and second alignment elements meet surfaces which fit together. Guitar according to claim 1, characterized in that said securing element is a threaded element. Guitar according to claim 1, characterized in that said fixing element is a screw. Guitar according to claim 1, characterized in that said fixing element is a bayonet. Guitar according to claim 1, characterized in that said first alignment element defines an elongated hole for receiving said fixing element. Guitar according to claim 1, characterized in that said first alignment element comprises a tube-like element with an internal thread and a frustoconical pin which is screwed onto said tube-like element. Guitar according to claim 1, characterized in that said second alignment member comprises a solid body with a receiving volume that matches said frustoconical pin, and further defines a threaded hole for receiving said connector element. fixation. Self-aligning folding guitar according to claim 1, characterized in that said hinge comprises: (i) a first hinge tip defining: (A) a first track comprising first and second tracks for receiving a pin sliding joint Soss; (B) a second track comprising third and fourth tracks for receiving a second Soss sliding pivot pin; (ii) a second pivot tip defining: (C) a third track comprising fifth and sixth tracks for receiving a third Soss sliding pivot pin; (D) a fourth track comprising seventh and eighth tracks for receiving a fourth Soss sliding pivot pin; (iii) a first Soss pivot assembly mounted on said first track; (iv) a second Soss pivot assembly mounted on said second track; (v) a third Soss pivot assembly mounted on said third raceway; and (vi) a fourth Soss pivot assembly mounted on said fourth track. 11. Articulation, characterized in that it comprises: (a) a first joint tip defining: (i) a first track comprising first and second raceways for receiving a first Soss sliding pivot pin; (ii) a second track comprising third and fourth tracks for receiving a second Soss sliding pivot pin; (b) a second pivot tip defining: (i) a third track comprising fifth and sixth tracks for receiving a third Soss sliding pivot pin; (ii) a fourth track comprising seventh and eighth tracks for receiving a fourth Soss sliding pivot pin; (c) a first Soss linkage assembly mounted on said first track; (d) a second Soss linkage assembly mounted on said second track; (e) a third Soss pivot assembly mounted on said third track; and (f) a fourth Soss link assembly mounted on said fourth track. Articulation according to claims 10 and 11, characterized in that: (g) a first bore is defined in said first articulation tip, said first bore positioned between said first and second tracks; and (h) a second hole is defined in said second pivot tip, said second hole positioned between said first and second raceways. Articulation according to Claim 12, characterized in that said articulation tips are rectangular in shape, and the breaking point between said arm part and said body part is moved to said body part. . Articulation according to Claim 13, characterized in that said articulation tips have flat sides and round corners. Articulation according to Claim 13, characterized in that said articulation tips have substantially pointed flat sides and edges. Articulation according to Claim 13, characterized in that said hole between said first and second lanes is roughly aligned in the same direction as said lanes. Articulation according to Claim 12, characterized in that said hole between said first and second lanes is roughly aligned in the same direction as said lanes. Articulation according to Claim 12, characterized in that said articulation is mounted near the base of said arm of said guitar and said tracks extend from the points at a first distance from the scale and near the center of said one. when said joint is in a closed position to points near the ends of said joint and displaced a second distance, said second distance being further from the scale of said stringed instrument compared to said first distance. Joint according to claim 12, characterized in that said Soss joint assemblies comprise pivot arms adjacent to one side of each part of said joint and said first hole and said second hole are positioned. on the opposite side of said joint tip. Articulation according to Claim 12, characterized in that said articulation is positioned in a stringed instrument with a face of said articulation, when in its closed position, resting on the scale of the instrument and said first fiire. and said second hole is positioned on the opposite side of said pivot tip. Articulation according to Claim 12, characterized in that the external sides of said articulation tips in which said first, third, fifth and seventh tracks are defined have a thickness in that part which defines said first, third, fifth and seventh lanes between five and ten percent of the width of said hinge to meet between the outer surfaces of the sidewalls of said hinge receiving said first and third lanes. Articulation according to Claim 12, characterized in that said outer sides of said articulation tips in which said first, third, fifth and seventh tracks are defined have a thickness in that part which defines said first, third thirds. Fifth and seventh lanes between seven and nine percent of the width of said joint defined between the outer surfaces of the sidewalls of said joint receiving said first and third lanes. Articulation according to Claim 12, characterized in that the thickness of said Soss articulation assemblies in the direction of the geometric axis of said articulation pins is between 30 and 70 percent of the width of said articulation defined between the external surfaces of the articulations. side walls of said joint receiving said first and third runways. Articulation according to Claim 12, characterized in that the external sides of said articulation tips in which said first, third, fifth and seventh raceways are defined are between 0.8 and 1.2 times their length. width. Articulation according to Claim 12, characterized in that said articulation is mounted near the base of said guitar's neck and said tracks extend from the points at a first distance from the scale and near the center of said articulation. when said hinge is in a closed position to points near the ends of said hinge and displaced a second distance, said second distance being further from the scale of said stringed instrument compared to said first distance, and wherein said Soss pivot assembly comprises pivot arms at pivot points adjacent to one side of each pivot tip of said pivot and said first fiire and said second bore are positioned on the opposite side of said pivot tip. Articulation according to Claim 25, characterized in that said articulation is positioned in a stringed instrument with a face of said articulation, when in its closed position, resting on the scale of the instrument and said first hole. and said second hole is positioned on the opposite side of said pivot tip. Articulation according to Claim 26, characterized in that the outer sides of said articulation tips in which said first, third, fifth and seventh raceways are defined have a thickness in that part which defines said first, third, fifth and seventh lanes between five and ten percent of the width of said hinge to find between the outer surfaces of the sidewalls of said hinge receiving said first and third lanes. Articulation according to Claim 26, characterized in that the thickness of said Soss articulation assemblies in the direction of the geometric axis of said articulation pins is between 30 and 70 percent of the width of said articulation defined between the outer surfaces. of the side walls of said hinge receiving said first and third tracks. 29. Guitar case, characterized in that it comprises: (a) a part of the case which receives the body of the guitar; (b) a cap on the body part of the guitar; (c) a box top of the arm portion; (d) an arm base box; (e) an arm side box wall; (f) an upper arm zipper portion securing said top of the arm part box to said side wall of the arm part box; (g) a lower arm zipper portion securing said arm portion housing base to said arm portion housing side wall; and (h) a zipper portion securing said guitar body portion cap to said guitar body receiving box portion. A guitar case according to claim 29, characterized in that it further comprises: (i) a first connector element attached to said top of the arm part box for securing said top of the arm part in a desired position ; (j) a second connector member secured to said arm portion housing base for securing said arm portion housing base in a desired position; and (k) a third connector member secured to said arm portion housing side wall for securing said arm portion housing side wall in a desired position. Guitar case according to claim 30, characterized in that it further comprises a charging strip. Guitar case according to claim 30, characterized in that said guitar body is provided with mated connectors for receiving the second and third connector set. 33. A method of making a foldable guitar, characterized in that it comprises cutting a neck part cavity and a body part cavity into an arm part and a body part, respectively, and closing one side of said arm cavity. arm part with a scale of the arm part and close one side of said body part cavity with a body part scale.