Patent Publication Number: US-11393442-B2

Title: Electric guitar with replaceable pickup, and pickup element for same

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application is a national stage entry of internation application number PCT/EP2019/050176 filed Jan. 4, 2019, which claims the benefit of Switzerland Application No. 00019/18, filed Jan. 10, 2018, each of said applications are expressly incorporated herein by reference in their entirety. 
     FIELD OF THE INVENTION 
     Electric guitars can produce a wide variety of sounds, which are produced by the vibration of strings, which are then electrically amplified. A traditional electric guitar is equipped with one or two so-called pickups, which are placed on the guitar body just below the strings, between the neck of the guitar neck, i.e. between the back end of the fingerboard and the bridge. Each pickup of a so-called pickup consists of an electric coil of several thousand turns of varnished copper wire around a magnetic core, and the two ends of the coil are electrically connected to an amplifier system via an insulated cable. The vibration of the string near one end of the coil induces electric currents in the coil due to the magnetic flux altered by the vibration of the string, which are used to produce sounds electrically by means of the amplification system, which then sends the amplified electric signals to a loudspeaker. Although the change in magnetic flux due to the vibrating string is very small, it is sufficient to generate a voltage of normally a few tens to a few hundred millivolts with a correspondingly high number of turns. The change in field strength and thus the induced voltage is greatest when the string swings back and forth to the pole instead of swinging sideways back and forth. The ferromagnetic strings must not be attracted by the magnet to such an extent that their vibration is significantly affected, otherwise they will sound impure. Consequently, with particularly strong magnets, the whole pickup must be positioned further away from the strings than with relatively weak magnets, which results in a reduction in output voltage compared to an equal distance, so that overall there is no higher output voltage. Extra-strong magnets therefore have no advantages. And no magnet can affect the sound because it only generates a magnetic field. It makes no difference whether the magnetic field is generated by a relatively expensive neodymium magnet, a cheap ferrite magnet or even an electromagnet, although the latter are not common in guitar pickups. There is only one theoretical influencing factor, namely the eddy currents that are generated in the magnet when the magnetic flux changes due to the string vibration. Eddy currents increase the damping of the sound-forming resonance peak. But here it is precisely the ferrite magnets, which are hardly electrically conductive, often referred to as ceramic magnets to create the feeling of higher valency, that are superior to expensive but electrically conductive alternatives such as AlNiCo magnets, because with them the eddy currents and thus the damping are negligible. In a pickup, however, the magnet is normally only responsible for a very small part of the damping. The whole discussion about the magnet material is therefore not justified. In particular, no magnet can sound “warm” or even aggressive, i.e. a magnet has no frequency response. The reasons for the “warm sound” of a pickup are always quite different. The sound depends very much on the nature of the coils. 
     BACKGROUND 
     The major disadvantage of such a pickup is its susceptibility to low-frequency magnetic fields, such as those generated by power transformers and ballasts of fluorescent lamps. When magnetic fields change, a voltage is induced in the coil. Therefore, a voltage is also induced in the pickup by these interference fields. This can easily be avoided by using two pickups instead of one and connecting them in series, i.e. one after the other, with reversed polarity. This has the effect that an external magnetic field induces a voltage in both coils, but these voltages cancel each other out due to the reversed polarity of the coils, so that no voltage is delivered at the output. The same happens with the useful signal, which is of course undesirable. But here you can easily remedy this by reversing the polarity of the magnets in a coil. This way, the coil produces a useful signal with the opposite polarity, but the opposite polarity of the coil means that the signal is the right way round again. Thus, a voltage twice as high as with only one coil appears at the output. Such pickups are called humbuckers or humbucking pickups, which are usually enclosed in a metal housing. They are used for example in the Gibson Les Paul and produce the Gibson tonality with two pickups with double coils. 
     In contrast, three pickups, each equipped with individual coils, produce what is known as Fender tonality, and these individual coil pickups are called single coil pickups. Guitars with the so-called humbucker pickups are mainly used for hard rock music, i.e. for a hard and full sound, while those with Fender tonality or also called Fender Stratocasters are used for country music and produce a somewhat nasal sound. 
     Musicians have always wanted to be able to produce different sounds on their electric guitars, preferably sounds that go beyond the fullness of sound offered by a single guitar. When a guitar is played with single coils, for example, you want to be able to switch to a humbucker pickup and vice versa. Guitars that have two pickups arranged one after the other under their strings can be activated, for example, by pressing a switch with three positions as desired. In one position of the switch the front, the so-called neck pickup is active, in a middle position both pickups are active and in a third position only the rear, so-called bridge pickup is active. 
     DESCRIPTION OF RELATED ART 
     The US 2015/0294659 A1 proposes another solution how to change from one pickup to another by placing several pickups on a rotating disc, which is mounted on the guitar body, where the desired pickup can be turned under the strings and the disc locks in this position. While this system allows the tonality to be changed quickly while playing, the tonality is limited to a limited number of pickups arranged on the turntable. 
     An installed pickup, whether mounted on the guitar body or on such a turntable, is always hard-wired and screwed to the base and can only be detached and replaced by another pickup with considerable effort. 
     SUMMARY 
     The task of the present invention is it—in view of this background—to create a guitar with pickups that are tool-less, i.e. that can be exchanged purely by hand, and to create the necessary pickup elements so that these pickups can be used in the guitar in a large number and variety depending on the requirements, easily and very quickly, i.e. within 3 to 5 seconds. In a special design of the guitar, at least two pickups should be able to be continuously switched on and off. 
     This task is solved by an electric guitar with at least one pickup in a continuous recess on the guitar body, characterized in that the pickup can be inserted into this recess from the back of the guitar body without tools within a maximum of 5 seconds and in doing so closes electrical contacts between its coils and connections in the recess in its fit, which lead via a cable to the output port on the guitar body, and that the pickup is held in its fit so that it can be released by hand without tools. Furthermore, the task is solved by a pickup element for an electric guitar, which is characterized by the fact that it has a fixing plate with a threaded bush for the height adjuster of the pickup and a locating hole for the guide pin on the base plate of the pickup, wherein the fixing plate can be fixed to an associated mounting frame which is intended for installation in a continuous pickup recess on a guitar body, and which forms a fitting seat for this fixing plate, can be inserted by hand without tools and can be released again from this mounting frame. For the infinitely variable switching on and off of the pickups, a touch screen is arranged in a special version of the guitar on the outside of the guitar body, and an electronic circuit is provided in or on the guitar body, so that by sliding a finger on the touch screen the individual pickups can be switched on or off infinitely more or less. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The drawings show examples of such a guitar with interchangeable pickups as well as the pickup element used for it. The following description describes it in more detail and explains how to insert and remove the pickup element, how it works and how to switch the pickups on and off continuously. 
       It shows: 
         FIG. 1 : A conventional guitar with three pickups and a switch lever; 
         FIG. 2 : The empty guitar body of an electric guitar, with recesses for three quickly replaceable pickups; 
         FIG. 3 : A rod magnet arrangement for the pickup; 
         FIG. 4 : A bar magnet assembly for the pickup; 
         FIG. 5 : The mounting frame for the interchangeable pickup; 
         FIG. 6 : The fixing plate with the base plate underneath on the pickup and pickup; 
         FIG. 7 : The pickup inserted into the side holders on the pick-up frame; 
         FIG. 8 : A guitar body with two recesses for the pickups and other recesses; 
         FIG. 9 : The pickup with fixing plate and height adjuster thread in a side view; 
         FIG. 10 : The pickup with fixing plate and height adjustment thread in a perspective view; 
         FIG. 11 : The pickup with fixing plate and contact heads, seen from above; 
         FIG. 12 : An alternative pickup with two rows of pickups; 
         FIG. 13 : A section of the guitar body with two recesses and next to the front recess the pickup to be inserted with its pickups visible on top; 
         FIG. 14 : A cutout of the guitar body with two recesses and next to the front recess the pickup element to be inserted with the pickups on the lower side, ready for insertion; 
         FIG. 15 : A pickup element as it is inserted from the back of the guitar body; 
         FIG. 16 : An alternative version of the fixing plate with central threaded hole; 
         FIG. 17 : The fixing plate as shown in  FIG. 16 , seen from the other side; 
         FIG. 18 : An alternative version of the mounting frame; 
         FIG. 19 : The pickup with adjustment thread, seen from below, lying on the pickups; 
         FIG. 20 : The pickup lying on the pickups, with the fixing plate screwed onto the adjustment thread on its back; 
         FIG. 21 : The pickup with the four branching contact wires and next to them the four contact pins insulated against each other for making contact with the contact points on the pickup frame; 
         FIG. 22 : A cut-out of the guitar body from above with the recess for a pickup, with the six strings running over it; 
         FIG. 23 : A cut-out of the guitar body seen from the back when inserting the pickup; 
         FIG. 24 : The cut-out of the guitar body on its backside as shown in  FIG. 23 , with the pickup inserted. 
     
    
    
     DETAILED DESCRIPTION 
     First of all,  FIG. 1  shows a conventional electric guitar and its components. The guitar body consists of a massive body  30 , mostly made of wood. It has a connection socket  31  for the output of electrical signals to an amplifier system. In the lower part of the outside of the guitar body there are two tone controls  32 ,  33  and a volume control  35 , all of which are designed as rotary knobs. A pickup selector  34  is realized here by a switch lever with three positions. Further you can see a vibration lever  36 . The plate, which covers the area below the strings on the guitar body, acts as an impact protection. On the neck  39  there is a fretboard  40  and frets  38  and orientation inlays  37  on the fretboard. At the end of the neck  39  there is the collar  41  with the nut  43  at the transition from the neck  39  to the collar  41  and on the collar the tuning pegs  42  are arranged. On the back of the guitar body the string suspension  44  is located and below the strings  48  the pickups are located, here a treble pickup  45 , a mid-position pickup  46  and a bass pickup  47 . These pickups can only be replaced with a relatively large effort and with the help of tools. Often they are replaced from the front side visible here, for which purpose the strings  48  have to be loosened, which of course requires a renewed tensioning and tuning of the strings  48  afterwards. 
     The present invention creates a guitar on which the pickups can be changed in a few seconds and without tools. For this purpose, the guitar body  3  is provided with at least one continuous recess  2  as shown in  FIG. 2 . In the example shown, the guitar body has three such continuous recesses  2 . In the rear area of the guitar body  3  you can see here a touch screen  25 , which is sensitive and effects different circuits of the electronic circuitry housed in the guitar body in different areas. If you press the touchscreen  25  for 2-3 seconds in the very rear end area  26 , the bridge pickup is switched on, i.e. pickup  45  for the high notes first of the bridge or string suspension. In the other, front end area of the touchscreen  25 , touching the end area  28  there for 2-3 seconds switches on the neck pickup, i.e. the pickup for the bass notes. Between these two end areas  26 ,  28  on the touch screen  25 , namely in area  27 , the pickups can be switched on and off continuously. So you can move your finger from back to front over the touchscreen  25  and then the high tones are continuously getting weaker and weaker and the low tones more and more strongly picked up by the strings. Conversely, if you move your finger from the front to the back, the low tones slowly become weaker and weaker and the high tones stronger and stronger. Another function is realized as follows: If you press with one finger, preferably the index finger berry, on the front area of the touch screen  25  and with another finger, preferably the middle finger berry, on the middle area of the screen, the neck pickup is switched on immediately and the bridge pickup is switched off immediately at the same time. If you press the touchscreen  25  again in this way, both pickups are activated again, i.e. the bridge pickup is switched on again. If you press with one finger, preferably with the index finger berry, in the middle area of the touch screen and with another finger, preferably with the middle finger berry, on the back of the screen, the neck pickup is immediately switched off and the bridge pickup is switched on at the same time. If you press the touch screen again in this constellation, the neck pickup is switched on again. At the edge of the guitar body  3 , at the lowest point when the guitar is hanging on the shoulders of a player in playing position, you can still see hole  59  for the guitars output port. 
       FIG. 3  shows a single pickup of a pickup. A bar magnet  49  is wound with copper wire  51  on a coil former  50 . Instead of using six individual pickups with one coil each, one often takes six bar magnets  49  and winds a single coil around them, using a cardboard or plastic holder to prevent the magnets and coil from moving against each other, in order to save material and also to keep the angular space compact. As an alternative to single bar magnets, one or two bar magnets  52  as shown in  FIG. 4  can be used, and the magnetic field can be guided through the coil with ferromagnetic bars or better adjusting screws  53 , which are provided with a socket  54  for this purpose. The volume of the individual strings  22  can be adjusted by positioning the pickup of the pickup more or less close to the string  22 . This is less convenient for pickups with bar magnets  49  and often only possible with a small hammer, which can be used to move the bar magnets  49  further away from the strings  22  by gently tapping them. If the rod magnet  49  has slipped too far down, you often have to remove the pickup to get to the other side. 
     In order that a pickup can be inserted into a precise fit in the recess  2  provided in the guitar body  3  as shown in  FIG. 2  and without the need for tools and so that it can be quickly exchanged, a mounting frame  4  as shown in  FIG. 5  is preferably inserted into recess  2  of the guitar body  3 . On two opposite sides of the mounting frame  4 , side holders  12  are screwed on with Allen screws  15 . Pressure springs  68  are fitted around the screws  15  under the side holders  12 . The side holders  12  are screwed onto the mounting frame  4  by compressing these compression springs  68 . These side holders  12  with their cams  29  at the ends form an exact fit for a fixing plate  14  on the pickup to be used. Two permanent magnets  13  are inserted into the top of each of these side holders  12 , which hold the magnetic fixing plate  14  in the inserted condition in a snug fit. One side holder  12  has a recess  58 , into which an element with the electrical contact points is inserted, whereby these contact points form a dent at each end, into which spring-loaded pins of the electrical outlets of the pickup to be inserted fit. By adjusting the screws  15  and more or less compressing the built-in compression springs  68 , the position of the side holders  12  can be changed and thus also of the pickup to be placed on them, as it soon becomes clear. In one variant, this frame can be made as a single injection-moulded part of plastic, i.e. the pick-up frame  2  and the side holders  12  which sit directly on it in one piece, in which case the compression springs  68  for changing the position of the side holders  12  are no longer needed. 
       FIG. 6  shows the fixing plate  14  and below it the pickup  1  with its base plate  8  in a tilted position. The height adjuster  18  consists of a threaded brass rod, which is mounted in the base plate  8  with its thread  17  and on which a rubber wheel  55  is screwed at the end, which can be easily turned with two fingers. The brass thread  17  of the height adjuster  18  is located in a threaded bush  16  in the fixing plate  14 . The fixing plate  14  also has a locating hole  19  for a guide pin  20  projecting vertically from the base plate  8 , over which the fixing plate  14  with its locating hole  19  is slipped. By turning the rubber wheel  55 , the distance between the fixing plate  14  and the base plate  8  can be finely adjusted. 
       FIG. 7  shows how this pickup element with its fixing plate  14  is inserted into the fitting seat on the mounting frame  4 . The fixing plate  14  is shaped at its four corners into bulges  56 , which fit exactly into the cams  29  on the side holders  12  on the mounting frame  2 . The four permanent magnets  13  in the side holders  12  strongly attract the ferromagnetic fixing plate  14  and thus hold it securely in its fit. By adjusting the screws  58 , the inserted pickup can be tilted more or less in all directions. For example, the distance of its pickups to the strings for the low notes and the strings for the high notes can be adjusted differently. If the frame is made of plastic, the fixing plate  14  can also be an injection-moulded plastic part that fits exactly to the frame, which then fits precisely into the frame between the end cams  29  and is held in this fit by permanent magnets  13 . 
       FIG. 8  shows a guitar body  3  with two recesses  2  for the pickups  1  and a further recess  63  to accommodate the electronic circuit  64  and the batteries that supply it with power  65 . A laterally offset recess  66  serves to accommodate the operating display, a touch screen to be inserted  25 . The screwed-on rubber wheels  69  visible along the edge of the guitar body serve as a holder for a cover to be placed on it. In the front recess  2  you can see the inserted neck pickup, and in the rear recess  2  you can see the built-in mounting frame  4  with its side holders  12 . For the installation of the mounting frame  4 , a step is formed on the inner wall of the recesses, so that a circumferential bearing surface is formed for the mounting frame  4 , onto which the mounting frame  4  can be glued, for example. In one of the side holders you can see the electrical contact points  5 , each of which forms a dent  24 , and which contact points  5  are led via a cable to the out-put port on the guitar body  3 . 
       FIG. 9  shows the pickup  1  screwed onto its height adjuster  18  by means of the thread  17  of its threaded bush  16  with the fixing plate  14 . The coils, coil bobbins and pickups of pickup  1  are housed and wired in a chrome-plated sheet metal housing  60 . At the fixing plate  14 , directed towards the pickup  1 , spring-loaded pins  23  protruding from the fixing plate  14  are arranged as electrical outlets  10  from the pickup  1 . These pins  23  fit into the dents  24  at the contact points  5  of the side holders  12 , for safe closing of electrical connections. The pins  23  are wired via cable  57  to the coils of the corresponding pickups of pickup  1 . 
     In  FIG. 10 , Pickup  1  is shown with its chrome-plated sheet metal housing  60  with the fixing plate  14 , which can be adjusted in distance from its base plate, further inclined towards the viewer. In this illustration you can see the six pickups  21  on the upper side of pickup  1  and in  FIG. 11  the pickup  1  and its housing  60  is shown seen from above. Therefore you can see here the six pickups  21  and below the pickup  1  the fixing plate  14  with its four contact pins  23  for the electrical outputs  10  of the pickup  1  or its pickup coils. Finally,  FIG. 12  shows an alternative pickup  1  with two rows of pickups  21 . 
       FIG. 13  shows a section of the rear side  6  of the guitar body  3  with two recesses  2  and next to the front recess  2  the pickup  1  to be inserted with its pickups  21  on its upper side and its fixing plate  14  on its lower side, which is screwed onto its height adjuster  18 . The pick-up element which can be inserted without tools is here on one side, i.e. it is shown in perspective diagonally seen from the side, whereby the upper side of pick-up  1  with its pickups  21  is also visible. In the recesses  2  you can see the pickup frames  4  with their side holders  12  and the contact points  5  with the dents they form  24 . At the very bottom, below the recesses  2  and the guitar body  3 , the strings  22  are running. 
       FIG. 14  shows the cut-out of the back  6  of the guitar body  3  with the two recesses  2  and next to the front recess the pickup  1  to be inserted in its fallen position with the fixing plate  14  screwed onto its height adjuster  18  and the rubber wheel  55  at the end of the height adjuster  18  for turning its brass thread and thus adjusting the distance of the fixing plate  14  to the base plate  8  of the pickup  1 . The cable  57  connects the coil hangers with the spring-loaded pins  23  on the fixing plate  14 , which in the view shown project downwards from the fixing plate  14 . 
       FIG. 15  shows how the pickup  1  is inserted from the back  6  of the guitar body  3  into the recess  2  on the guitar body  3 , although here the mounting frame  4  and the fixing plate  14  are still missing. Take hold of the pickup  1  with thumb and index finger at its height adjuster  18  and insert it into the recess  2 . If it is equipped with the fixing plate  14  and the recess is fitted with the mounting frame  4 , the fixing plate  14  is positioned exactly on the fitting seat on the mounting frame  4  and held firmly in the fitting seat by the permanent magnets  13  on the side holders  12 . The spring-loaded pins  23  on the fixing plate  14  are automatically pressed onto the dents  24  of the electrical contacts  5  on the side holder  12  and thus a secure electrical connection between the coils of the pickup and the output port  7  of the electric guitar is established. 
       FIG. 16  shows an alternative version of the fixing plate  14  with a central threaded hole  16 . This fixing plate  14  has permanent magnets  13  mounted on its side.  FIG. 17  shows this fixing plate  14  as shown in  FIG. 16 , seen from the other side, and  FIG. 18  shows the mounting frame  4  belonging to this fixing plate  14  with its side walls  67  projecting upwards. The fixing plate  14  can be inserted between these side walls  67  and is then held securely in position by the magnetic forces of the permanent magnets  13  facing each other. The slot  61  on one side wall  67  of the mounting frame  4  is used to accommodate a plastic insert element which has the electrical contact points  5  to the guitar&#39;s output port. The electrical connections between the electrical outlets of the pickup on the fixing plate  14  and these contact points  5  on the side wall of the mounting frame  4  are made by means of pins  23 , the heads of which project slightly beyond the edge of the fixing plate  14 . When the fixing plate  14  is inserted, these pins  23  slide over the contact points  5  and establish the electrical connection. However, a pickup can be quickly removed from the mounting frame  4  with its fixing plate  14  at any time with sufficient force and without tools. It is grasped at the height adjuster  18  and simply pulled out of the mounting frame  4  and thus out of the recess  2 . 
       FIG. 19  shows a pickup  1  with height adjuster  18  and its adjustment thread as seen from below, i.e. lying on the heads of its pickups  21  in a fallen position. On the underside of the pickup  1  you can see its base plate  8 , while the coils, the bobbins and pickups are housed in a case  60 . From the coils, their electrical outlets lead via cable  57  to the electrical contact points  10  on pins  23  on the fixing plate  14 . 
       FIG. 20  shows the pick-up  1  and its housing  60  lying on the pickups in a tilted position, with the fixing plate  14  screwed onto the brass thread of the height adjuster  18  on its rear side, where you can see the permanent magnets  13  for holding on to the side walls  67  of the mounting frame  4  according to  FIG. 18 , and the pins  23  with rounded heads embedded in an insert element whose heads slightly protrude from the side wall of the fixing plate  14 .  FIG. 21  shows the four electrical outlets  10  from the coils of pickup  1 , which are then connected to the insulated pins  23  in this insert element. 
       FIG. 22  shows a cut-out of the guitar body  3 , seen from its front side  9 , with the recess  2  for a pickup, with the six strings  22  running over it. Only one side wall  67  with the electrical contact points  5  with dents  24 , which lead to the output port on the guitar body  3  via a cable leading away, and the permanent magnets  13  in this side wall  67  can be seen from the mounting frame.  FIG. 23  shows the same cut-out from the rear side  6  of the guitar body  3 . Above this, an aluminum support  62  leads to the stability of the guitar, especially to the absorption of the string tension. The pickup element  1  is inserted here straight from the back  6  of the guitar body  3  by grasping it at the fixing plate  14  and inserting it between the two side walls  67  at the mounting frame  4 . The permanent magnets  13  on the fixing plate  14  and on the side walls  67  will soon face each other and hold the fixing plate  14  in this position.  FIG. 24  shows the situation when the pick-up element  1  is completely inserted and the permanent magnets  13  on the fixing plate  14  are opposite those on the side walls  67  of the mounting frame  2 . 
     Instead of a magnetic mounting of the pickup element, the pickup element can also be designed in such a way that its fixing plate  14  in recess  2  clicks into a catch purely mechanically, for example against a mechanical spring force, and that this spring force can only be overcome by pulling out the fixing plate  14  with sufficient force, or that the catch can be released by pressing a button or actuating a slider or by turning a knob. The pickup element may also be held mechanically in the recess by being pushed into the recess against mechanical pressure springs from the rear of the guitar body and then a slider or turntable can be pushed or swung over the fixing plate at the rear, after which the pickup element or its fixing plate  14  is secured in its fitted position. 
     With such a pickup element, which can be inserted from the rear side  6  of the guitar body  3  in the recesses  2  in it in the manner shown, the replacement of pickup  1  for the production of different tones and tonalities is very simple and also very fast. The cover plate on the back leaves the recesses  2  with the inserted pickups carefully free. Practical tests have shown that it only takes 3 to 5 seconds to change a Pickup  1 . In addition, the distance between the pickup and the strings  22  can be adjusted by turning the rubber wheel  55  on the height adjuster  18 . 
     LIST OF NUMBERS 
     
         
           1  Pickup truck 
           2  Recess 
           3  Guitar bodies 
           4  Mounting frame 
           5  Contact points on the mounting frame or on the side brackets to the output port 
           6  Back of the guitar body 
           7  Output port on guitar body 
           8  Base plate on the pickup 
           9  Front of the guitar body 
           10  Electrical outlets on the pickup 
           11  Coil on pickup 
           12  Side holders on mounting frame 
           13  Permanent magnet 
           14  Fixing plate 
           15  Screws for mounting frame 
           16  Threaded bushing 
           17  Thread on the height adjuster of the pickup 
           18  Height adjuster 
           19  Locating hole Fixing plate 
           20  Guide pin on the base plate  8   
           21  Pickup 
           22  Strings 
           23  Spring loaded pins on the fixing plate. 
           24  Dent for the pins  23   
           25  Touch screen 
           26  On/Off button for bridge pickup 
           27  Mix button between bridge and neck pickup 
           28  On/Off button for neck pickup 
           29  Cams for passport seat 
           30  Solid body 
           31  Connection socket 
           32  Tone controls 
           33  Tone control 
           34  Pickup selector switch 
           35  Volume control 
           36  Vibrating lever 
           37  Orientation insert 
           38  Federation 
           39  Neck 
           40  Fingerboard 
           41  Collar 
           42  Tuning peg 
           43  Saddle 
           44  String suspension 
           45  Treble pickup 
           46  Mid-position pickup 
           47  Bass pickup 
           48  Strings 
           49  Rod magnet 
           50  Coilformers 
           51  Winding/coil 
           52  Bar magnet 
           53  Adjusting screw 
           54  Socket for adjusting screw 
           55  Rubber wheel for height adjustment 
           56  Bulge at the corners of the fixing plate 
           57  Cable from pickup coils to the pins on the fixing plate 
           58  Recess for the contacts 
           59  Hole for insert Output port 
           60  Pickup housing 
           61  Slot for insert element with electrical contacts 
           62  Steel support for absorption of string tension 
           63  Recess for electronic circuit 
           64  Electronic switching 
           65  Batteries for electronic circuits 
           66  Recess to accommodate the touch screen 
           67  side panels on mounting frame  4   
           68  Pressure springs 
           69  Rubber Wheels an guitar body