FR2489995A2

FR2489995A2 - Guitar having elongate configuration - has machine heads contained within openable shell and neck section extending to form tapered body portion

Info

Publication number: FR2489995A2
Application number: FR8019512A
Authority: FR
Original assignee: Individual
Current assignee: Individual
Priority date: 1980-06-10
Filing date: 1980-09-10
Publication date: 1982-03-12

Abstract

The assembly affords a number of different types of straight or stick guitar constructions and include a metal injected model enabling the guitar to be opened along the whole of its length to locate the desired electrical circuit. A metal injected model facilitates connection to the circuits. A glass fibre model is moulded to any preferred shape. A model pressed from sheet steel presents an integral exterior. A plastic model is virtually unbreakable. A cast metal model is relatively cheap and a wooden model uses traditional material for guitar construction. The guitar comprise a head carrying the mechanics, a body formed by a shell, a bridge covering the shell on which the nuts are located and a foot comprising a balance weight. A lever for the guitar is inclined under the plane of the strings so as to compensate the pull of the guitar strap and give the string plane a position parallel to the guitar body. The shell contains a circuit, plugged into a connector, which contains a microphone and potentiometer circuits.

Description

Le présent dépot concerne les instruments de musique de type guitare ou buse. baton
Il existe plusieurs types de telles guitares, employant des techniques de rêalisation différentes.This deposit concerns musical instruments of the guitar or nozzle type. stick
There are several types of such guitars, employing different realization techniques.

Les montages suivant le depot présentent les avantages suivant: un des modèles en métal injecté permet d'ouvrir l'instrument sur toute sa longueur pour y placer les circuits désirés, l'autre modèle en métal injecté présente une grande facilité de sortie des circuits, le modèle en fibre de verre perme de mettre facilement en pied de guitare une forme quelconque, le modèle en tôle emboutie présente un aspect extérieur monobloc, le modèle en: plastique est un jouet quasiment intassables le modèle en métal coulé ne nécessite pas de gros investissement pour sa réalisation, le modele en boisUutilise le matériau traditionnel de confection des guitares. The assemblies according to the deposit have the following advantages: one of the injected metal models allows the instrument to be opened over its entire length to place the desired circuits there, the other injected metal model has great ease of output from the circuits, the fiberglass model allows you to easily put any shape on the guitar base, the stamped sheet metal model has a monobloc external appearance, the plastic model is an almost unbreakable toy the cast metal model does not require a large investment for its realization, the wooden modelU uses the traditional material of confection of the guitars.

Ces guitares baton sont compoaées d'une tSte ou sont placées les- mécanique d'un corps constitué d'une cogue fbrmant l'arrondi sous le manche et d'un pont couvrant la coque sur lequel sont placés les sillets, et d'un pieoe comportant une masse d'équilibrage. Le pont présente une cuvette, affaissemen de sa surface en deçà des sillets dégageant la place pour attaquer les cordes
Les techniques décrites pour un modèle particulier peuvent être utilisées un autre dans la mesure de compatibilité. Le manche est la partie du corps où sont placés les- sillets.La barre d'attache de la bretelle est inclinée sous le plan des cordes de façon à compenser le tirage de la bretelle et å donner au plan des- cordes une position parallèle au corps de l'instrumentiste
Un modèle en métal injecté se compose d'une coque I formant l'arrondi du manche, et d'un pont 2 sur lesquels sont placés les sillets. Cesw deux élé ment s sont assemblés suivant une surface 3 par un collage thermique qui permet par chauffage de la surface de desassembler les éléments. La colle thermique est choisie de façon à résister aux températures d'un usage ordinaire et accidentel, et à céder sans endommager les circuits intérieurs.These stick guitars are made up of a head or are placed mechanically with a body made up of a cog fbrmant the rounding under the neck and a bridge covering the hull on which the saddles are placed, and a pieoe with a balancing mass. The bridge has a bowl, sagging of its surface below the sills clearing the place to attack the ropes
The techniques described for a particular model can be used another in the compatibility measure. The handle is the part of the body where the saddles are placed. The strap of the strap is inclined under the plane of the strings so as to compensate for the draw of the strap and to give the string plane a position parallel to the body of the instrumentalist
An injected metal model consists of a shell I forming the rounding of the handle, and a bridge 2 on which the saddles are placed. Cesw two elements are assembled along a surface 3 by thermal bonding which allows by heating the surface to disassemble the elements. The thermal adhesive is chosen so as to withstand the temperatures of ordinary and accidental use, and to yield without damaging the interior circuits.

Une machine pour le collage et le décollage est utilisée de façon å mettre en température, rapidement et localement les surfaces de collage Elle est constituée d'un élément chauffant se plaçant sur le pont exactement au-dessus de la surface de collage. Une pâte établit un parfait contact thermique et une étanchéité permettant de maintenir le pont au contact de l'élément chauffant par une dépression atmosphérique.L'ensemble est assemblé de fa çon que collage et décollage ne soient qu'un simple mouvement de presse.On distingue dans la coque un volume 4 où sont placés les micros 5 tenus sur des encoches 6 faites dans la paroi, volume dans lequel peut se placer un circuit 7 fiché sur un connecteur 8, muni entre les micros de potentiomètres 9 à double inverseur, commandés par tirage de l'axe qui est démontable, de façon à sortir ce circuit par l'ouverture sur le pied de l1instrument. La partie supérieure des parois de ce volume est surface de collage avec le pont.Apres ce volume en creux, un volume en plein 10 permet la fixation de la barre d'attache 11 de l'instrument sur un noyau 12 serti dans ce volume
En trou 13 est percé pour le passage de la barre du côté choisi (! instrument pour gaucher ou pour droitier ).Deux canaux 14 chevauchent ce volume de part et d'autre du noyau, au-dessus du passage de la barre, de façon à laisser le passage aux fils électriques.Entre ces canaux, dans leur descente à l'intéri -eur du volume, deux évidements 15 sont des logements pour des pattes tenant au pont un connecteur reliant électriquement les éléments de la coque à ceux du pont. La partie supérieure de ce volume est surface de collage-avec le ponts Entre les- deux branches du V formé par l'axe des barres d'attache. Un
deuxième volume 16 présente un trou 17 dans le fond de la coque, qui livre passage à un connecteur 18 pour recharger les batteries.Ce trou est suffisa- ment large et incliné, de façon que ce connecteur soit un piton supportant l'instrument vertical sur nn ratelier. Un rebord 19 permet de place une pa. A gluing and peeling machine is used to quickly and locally heat up the bonding surfaces. It consists of a heating element which is placed on the deck exactly above the bonding surface. A paste establishes a perfect thermal contact and a seal making it possible to maintain the bridge in contact with the heating element by an atmospheric depression. The whole is assembled in such a way that bonding and take-off are only a simple press movement. distinguishes in the shell a volume 4 where the microphones 5 are placed held on notches 6 made in the wall, volume in which can be placed a circuit 7 plugged into a connector 8, provided between the microphones of potentiometers 9 with double inverter, controlled by pulling the axis which is removable, so as to exit this circuit through the opening on the foot of the instrument. The upper part of the walls of this volume is bonding surface with the bridge. After this hollow volume, a full volume 10 allows the attachment bar 11 of the instrument to be fixed on a core 12 set in this volume
In hole 13 is drilled for the passage of the bar on the chosen side (! Instrument for left-handed or right-handed) .Two channels 14 overlap this volume on either side of the core, above the passage of the bar, so to allow passage to the electrical wires. Between these channels, in their descent inside the volume, two recesses 15 are housings for lugs holding to the bridge a connector electrically connecting the elements of the hull to those of the bridge. The upper part of this volume is bonding surface-with the bridges Between the- two branches of the V formed by the axis of the tie bars. A
second volume 16 has a hole 17 in the bottom of the shell, which gives way to a connector 18 for recharging the batteries. This hole is sufficiently wide and inclined, so that this connector is a peg supporting the vertical instrument on nn rack. A flange 19 allows a place pa.

roi 20, délimitant un troisième volume: la chambre des batteries 21, accessibles par une trappe 22, ménagée dans le fond de la coque. Une deuxième plaque munie, ainsi que la première des contaots aux batteries, s'appuie sur un autre rebord, et ferme de cette façon la chambre des batteries sous laquelle passe la continuité des canaux des fils électriques - recouverus à cet endroit de plaques- collées 23 - qui débouchent en se rejoignants dans un quatrième volume en creux 24 fermé par une cloison moulée avec la coque. Au delà de cette cloison 25un volume en creux mène jusqu'à la toute de ltins- trument.La partie supérieure des parois moulées des- volumes- cités sont surfaces de collage.Un fil court dans une rigole 26 faite dans la surface de collage du quatrième volume en creux à la tette de l'instrument où il est connecté au baton 27 prenant place entre les deux branches de la pièce 28 supportant les mécaniques de' tension de cordes à laquelle il est aollé électriquement isolé de façon à servir d'antenne du signal audio produitpar l'instrument.Le pont commence aw pied de l'instrument où il ferme la surface 29 de collage de la coque avec le pied et présente successivement les trous de- passage des capteurs de micros, puis les sillets' de tonalité entre lesquels on trouve, à la deuxième octave, de part et autre du sillet, deux trous 30 permettant de placer des contacteurs sensitifs en creux réagissant au contact d'une pièce métallique ( clé de contact, clou ou- autre, mais insensible au doigt et à la sueur) et s'allumant lorsque le contact est établis permettant de mettre sous/hors- tension les circuits de transformation du signal audio placé dans le premier volume en creux et l'émetteur placé dans le quatrième volume en creux, Ces contacts munis d'un éclairage d'une autre couleur servent de témoins de charge et de fin de charge des batteries. Àu premier octave, deux trous 31 de part et d'autre du sillet comportent des bouchons permettant l'un d'avoir accès au cristal de l'émet- teur pour changer sa fréquence, T'autre au cinquième volume en cr Le pont s'arrête Juste avant le sillet immédiatement après les mécaniques Le pied collé au corps présente le cordier, le chevalet et la masse d'équilibra getLe jack de sortie et les commandes de réglage du signal peuvent être sur le pied.Ona alors, un connecteur entre le pied et le circuit du premier volume, disposé de telle façon qu'il se débranche correctement lbrs de 1" arrachage du pied, et à cette fin le pied3 présente une paroi perpendiculaire à ce circuit, où sera disposé le connecteur; ils peuvent aussi être sur la paroi de la coque, au niveau du premier volume. Les micros sont de facture classique, quoique les noyaux aient désaxes en faisceau, au lieu d'être parallèles, ceci pour allier le manque de place et le besoin d'un bobinage suffisant Un autre système emploie des capteurs déaxés: ils débouchent juste sous les cordes et plongent dans la bobine parallèles entre eux. Ces capteurs sont alors sertis au pont lors du moulage, leur partie maintenant la translation de leur axe -moulée dans le pont.king 20, delimiting a third volume: the battery chamber 21, accessible by a hatch 22, formed in the bottom of the hull. A second plate provided, as well as the first of the contaots to the batteries, rests on another rim, and in this way closes the battery chamber under which passes the continuity of the channels of the electric wires - covered in this place with plates - glued 23 - which open by joining in a fourth hollow volume 24 closed by a partition molded with the shell. Beyond this partition 25, a hollow volume leads to the whole of the instrument. The upper part of the molded walls of the above-mentioned volumes are bonding surfaces. A short wire in a channel 26 made in the bonding surface of the fourth hollow volume at the head of the instrument where it is connected to the baton 27 taking place between the two branches of the piece 28 supporting the mechanical tension of strings to which it is electrically isolated so as to serve as an antenna of the audio signal produced by the instrument. The bridge begins at the foot of the instrument where it closes the surface 29 for bonding the shell with the foot and successively presents the passage holes for the pickups of the microphones, then the tone sills. between which there are, at the second octave, on either side of the nut, two holes 30 for placing sensitive contactors in hollow reacting to contact with a metal part (ignition key, nail or other, but insensitive to the finger et al sweat) and lighting up when the contact is established allowing to turn on / off the audio signal transformation circuits placed in the first hollow volume and the transmitter placed in the fourth hollow volume, These contacts provided with '' another color of lighting serve as charge and end of battery charge indicators. At the first octave, two holes 31 on either side of the nut have plugs allowing one to have access to the emitter's crystal to change its frequency, The other to the fifth volume in cr The bridge s '' stops Just before the nut immediately after the mechanicals The foot glued to the body presents the tailpiece, the bridge and the balance weight getThe output jack and the signal adjustment controls can be on the foot.On then, a connector between the foot and the circuit of the first volume, arranged in such a way that it disconnects correctly lbrs from 1 "tearing off of the foot, and for this purpose the foot3 has a wall perpendicular to this circuit, where the connector will be disposed; they can also be on the wall of the hull, at the level of the first volume. The microphones are of classic invoice, although the nuclei have offset axes, instead of being parallel, this to combine the lack of space and the need for a winding sufficient Another system uses captors rs offset: they open just below the ropes and plunge into the coil parallel to each other. These sensors are then crimped to the bridge during molding, their part maintaining the translation of their axis -molded in the bridge.

L'aimant est assemblé par collage aux bobines. L'un des micros présente des bobinages supplémentaires autour de chaque capteur, ceci afin de commander un synthétiseur. L'aimant est alors plus trappu, et un profilé magnétique en
L renvoie le champ aux capteurs équipés des seconds bobinages. Ce micro a, soit une sortie sur la coque vers des circuits extérieurs à la guitare, soit soit fait passer ses fils de sortie par les canaux, jusqu'à déboucher dans le cinquième volume, où sont placés les circuits d'un synthétiseur de son cern- mandé par un clavier aux touches identiques à celle du deuxième octave, permettant de "taper" le nombre correspondant au son choisi. Le guitariste aura alors une bague avec une petite pointe lui permettant de programmer son son.The magnet is assembled by gluing to the coils. One of the microphones has additional windings around each sensor, in order to control a synthesizer. The magnet is then more trapped, and a magnetic profile in
L returns the field to the sensors fitted with the second coils. This microphone has either an output on the shell to circuits external to the guitar, or either passes its output wires through the channels, until reaching the fifth volume, where the circuits of a sound synthesizer are placed. controlled by a keyboard with keys identical to that of the second octave, allowing the number corresponding to the chosen sound to be "typed". The guitarist will then have a ring with a small tip allowing him to program his sound.

Un modèle en métal injecté à un corps ouvert aux deux extrémités, le pont et la coque étant une seule et même pièce. Uh noyau fait alors toute la lon -gueur du corps maintenu en position par rapport au moule à ses deux extrémi -tés. Ce noyau est arraché par l'ouverture du pied et laisse alors dans le corps un vide, bordé de chaque coté par une rainure près du pont qui servira à maintenir un circuit sur toute la longueur du corps,vide, et dans lequel on distingue trois zones: le manche à 11 extrémité duquel un décrochement permettra de placer un connecteur, la cavité des micros prise du pied, et entre les deux la place pour le noyau sur lequel vient se fixer la barre - volume qui a des génératrices parallèles de façon que le noyau soit un morceau de profilé bouton fixe au moyen d'une ou dèux vis placées entre les sillets et recouvertes d'une pastille servant de repérage d'octave noyas qui présente sous le pont de part et d'autre des vis des échancrures laissant passer le circuit imprimé qui fait toute la longueur de l'instrument maintenu par les rainures sur le c8té de la coque près du pont. Le vissage du noyau peut se faire sous la coque dégageant alors plus de place pour le passage du circuit.Tous les éléments électriques de la guitare sont montés sur ce circuit. Les micros ont des capteurs placés dans le pont soit lors du moulage la partie les maintenant dans le moule est alors usinée pour être au niveau de la surface exterieure du pont, soit par perçage en faisceau et mise en place par collage ou coincement thermique. Les potentiomètres contacteurs et éventuellement jack démontent leur axe de façon à rester soudés au circuit tout en lui permettant de glisser pour sortir du corps. Dans le cas où des éléments électriques sont montés sur le pied, un connecteur relié au circuit est vissé dans le fond de la coque dans-une position où il se séparera bien de son pendant sur le pied lors de son accrochage.Ce pied normalement collé sur une surface standard peut être vissé: deux attes--du pied viennent alors contre le fond de la coque de façon que lbs-trous de ce vissage donnent accès chacun à une vis tenant le pont avec le pied. La place disponible sur le circuit dans le manche permet d'y placer des circuits assez complexes dont la mise en route utilise le dispositif suivant: une pastille transparente avec une tige magnéti- saque en son centre est placée dans l'arrondi du manche de façon à être visible de l'instrumentiste quand il joue, et de façon que cette pastille ne crée pas de discontinuité de surface- sur le manche à l'intérieur ou à ltexterieur; le circuit imprimé en face de cette pastille dispose d'un circuit intégré installé dans un boîtier transparent et ayant les fonctions suivantes: un noyau qui le traverse de part en part crée une sensibilité à un champ magnétique de ce circuit qui branche/débranche les circuits qu'il commande, tout en allumant une LED dans son boîtier.Un renvoi est collé sur ce circuit de façon à établir la continuité de la masse transparente et du noyau magnétique avec ceux de la pastille et ltinstnmentiste dispose alors d'une bague ou d'un bracelet qui doit être amené en contact de la pastille pour commander les circuits désirés tandis qu'il peut visualiser par la lumière les circuits qui sont branchés. A model in injected metal with a body open at both ends, the deck and the hull being one and the same piece. Uh core then makes all the length of the body maintained in position relative to the mold at its two ends. This core is torn off by the opening of the foot and then leaves a void in the body, bordered on each side by a groove near the bridge which will serve to maintain a circuit over the entire length of the body, empty, and in which there are three zones: the handle at the end of which a hook will allow a connector to be placed, the cavity of the microphones taken from the base, and between the two the place for the core on which the bar is fixed - volume which has parallel generatrices so that the core is a piece of fixed button profile by means of one or two screws placed between the sillets and covered with a pad used to locate the octave noyas which has under the bridge on either side of the screws notches leaving pass the printed circuit which runs the entire length of the instrument held by the grooves on the side of the hull near the deck. The screwing of the core can be done under the shell thus freeing up more room for the passage of the circuit. All the electric elements of the guitar are mounted on this circuit. The microphones have sensors placed in the bridge either during molding, the part holding them in the mold is then machined to be at the level of the external surface of the bridge, or by drilling in a beam and positioning by gluing or thermal wedging. The contact and possibly jack potentiometers disassemble their axis so as to remain welded to the circuit while allowing it to slide out of the body. In the case where electrical elements are mounted on the foot, a connector connected to the circuit is screwed into the bottom of the shell in a position where it will separate well from its counterpart on the foot when it is hooked. on a standard surface can be screwed: two attes - of the foot then come against the bottom of the hull so that lbs-holes of this screwing give access each to a screw holding the bridge with the foot. The space available on the circuit in the handle makes it possible to place fairly complex circuits, the start-up of which uses the following device: a transparent patch with a magnet rod in its center is placed in the rounding of the handle so to be visible to the instrumentalist when he plays, and in such a way that this patch does not create a surface discontinuity on the neck inside or outside; the printed circuit opposite this patch has an integrated circuit installed in a transparent box and having the following functions: a core which crosses it right through creates a sensitivity to a magnetic field of this circuit which connects / disconnects the circuits that it controls, while lighting up an LED in its housing. A reference is stuck on this circuit so as to establish the continuity of the transparent mass and the magnetic core with those of the pastille and the instnmentist then has a ring or d 'A bracelet which must be brought into contact with the pad to control the desired circuits while it can visualize by light the circuits which are connected.

Ces pastilles peuvent aussi être les touches d'un clavier, avec éventuellement un affichage digital visible sur le manche, à travers une lNicarne,et donnant le numéro de 11 effet choisi.These pads can also be the keys of a keyboard, possibly with a digital display visible on the handle, through a lNicarne, and giving the number of 11 effect chosen.

Le modèle en fibre de verre est réalisé avec un moule en deux coquilles se séparant suivant la longueur de l'instrument. On réalise un noyau léger, creux ou de mousse expansé, qui remplira le manche de l'attache de la barre à la tète de l'instrument. Un deuxième noyau qui sera retiré fait la cavité où seront logés les micros et potentiomètres. Ce noyau est maintenu en position solidaire de la coquille de la coque.Cette coquile est remplie de plusieurs couches de laine de verre de façon qu'après avoir placé les noyaux on rabatte dessus alternativement une couche venant des la droite, une couche venant de la gauche du fanon à assurer autour des noyaux un enrobage sans discontinuité. Entre les deux noyaux précités un troisième a été placé qui servira à ancrer la barre d'attache, mais il peut avoir été remplacé par un bourrage de laine de verre; dans le cas d'un noyau solide il peut avant sa pose entre équipé des formes nécessaires à l'ancrage de. la barre de- façon que lors du démoulage on ait qutun opercule à faire sauter pour avoir accès au trou de fixation de la barre.La deuxième coquille donnant la forme du pont est mise en place et l'ensemble qui était horizontal pour la pose de la laine de verre est mis en position verticale, la tête de l'instrument en bas. On injecte alors la résine par le bas jusqu'à ce- qu'elle arrive en haut ou dépasse de la laine de verre qui ne sera pas prise dans la résine et servira pour la fixation du pied sur la guitare. Après solidifi -cation on démoule et arrache le deuxième noyau dégageant la cavité dans laquelle on placera micros, potentiomètres, jack cablés ensembles et d'autres circuits si désirées0 Avant de placer ces éléments des trous sont percés pour les recevoir. Pour les- micros des trous sont percés en faisceau de façon à placer les capteurs en ramenant leur axe vers l'axe de la guitare.Ces capteurs font soit l'epaisseur du stratifié et viennent en contact avec une masse métallique dans le micro qui est alors simplement collé sous le pont, soit dépassent dans la cavité et les bobinages des micros viennent alors s'enfiler dessus. Notons ici que les parois de la cavité ont été recouvertes d'une couche conductrice ( peinture ou feuille métallique ) formant blindage. The fiberglass model is made with a mold in two shells that separate along the length of the instrument. A light, hollow or expanded foam core is made, which will fill the handle of the bar attachment to the head of the instrument. A second core which will be removed makes the cavity where the microphones and potentiometers will be housed. This core is held in a position integral with the shell of the shell. This shell is filled with several layers of glass wool so that after having placed the cores one alternately folds over a layer coming from the right, a layer coming from the left of the baleen to ensure around the cores a coating without discontinuity. Between the two aforementioned cores a third has been placed which will serve to anchor the tie bar, but it may have been replaced by a glass wool stuffing; in the case of a solid core it can before its installation between equipped with the forms necessary for the anchoring of. the bar so that during the demolding there is only a lid to blow to gain access to the fixing hole of the bar. The second shell giving the shape of the bridge is put in place and the assembly which was horizontal for the installation of the glass wool is put in an upright position, the head of the instrument at the bottom. The resin is then injected from below until it reaches the top or protrudes from the glass wool which will not be caught in the resin and will be used for fixing the foot to the guitar. After solidifi -cation we unmold and tear off the second core releasing the cavity in which we will place microphones, potentiometers, jack wired together and other circuits if desired0 Before placing these elements holes are drilled to receive them. For the microphones, holes are drilled in a beam so as to place the sensors by bringing their axis towards the axis of the guitar. These sensors are either the thickness of the laminate and come into contact with a metallic mass in the microphone which is then simply glued under the bridge, or protrude into the cavity and the windings of the microphones then thread on it. Note here that the walls of the cavity have been covered with a conductive layer (paint or metallic foil) forming a shield.

D'autres trous traversent de part en part l'instrument au voisinnage du pied de' façon à placer des tubes qui servent de cordier et de chevalet. Les cordes sont enfilées sous la guitare par ces tubes et ressortent sur le dessus où les tubes taillés en forme à leur extrémité et placés exactement servent de chevalet. Mais avant de placer ces tubes on fixe le pied. Celui ci est le contrepoids de l'instrument et présente l'attache de la bretelle.La fibre de verre libre à l'extrémité du manche est placée dans un trou ménagé dans le pied et quand tout est en position on injecte la résine par un des trous des tubes du cordier, alors que les autres tubes sont en place reliés entre euz électriquement ainsi qu'avec la masse métallique du pied et le blindage et un fil sortant par un des trous du dernier tube auquel il sera connecté avant d'être mis en place. On fignole la jonction entre le pied et le manche et met en place les sillets et mécaniques. On a ainsi réalisé un instrument indémontable' qui pour réparation ou modification nécessitte ltouverture dune trappe dans le fond de la cavité avec une scie.Cependant on réalise une version ou le moule comporte une' forme pour une trappe d'accès dans le fond de la coque permettant d'avoir accès à la cavité des micros.Other holes pass right through the instrument in the vicinity of the foot so as to place tubes which serve as tailpiece and bridge. The strings are threaded under the guitar by these tubes and come out on top where the tubes cut in shape at their end and placed exactly serve as bridge. But before placing these tubes we fix the foot. This is the counterweight of the instrument and has the strap attachment. The free fiberglass at the end of the handle is placed in a hole in the foot and when everything is in position the resin is injected by a holes in the tailpiece tubes, while the other tubes are in place, connected electrically as well as with the metal mass of the foot and the shield and a wire exiting through one of the holes in the last tube to which it will be connected before being put in place. We tweak the junction between the foot and the handle and set up the saddles and mechanics. We thus produced a non-removable instrument 'which for repair or modification requires the opening of a hatch in the bottom of the cavity with a saw. However, we make a version where the mold has a' shape for an access hatch in the bottom of the shell providing access to the microphone cavity.

De même un autre moule est équipé pour faire une trappe près de l'ancrage de la barre donnant accès au noyau du manche qui est alors équipé pour
recevoir des batteries et/ou des circuits électroniques. Pour l'ancrage de
la barre d'attache de la bretelle soit on perce l'opercule du noyau solide
soit on perce un trou au fond duquel on colle un manchon présentant un pas
de vis ou une baïonnette pour recevoir la barre. On moule cette guitare avec
sa tête ou avec une surface standard pour recevoir n1 importe quelle tête.Similarly, another mold is equipped to make a hatch near the anchorage of the bar giving access to the core of the handle which is then equipped to
receive batteries and / or electronic circuits. For anchoring
the strap attachment bar or we pierce the lid of the solid core
either we drill a hole at the bottom of which we stick a sleeve with a pitch
screw or bayonet to receive the bar. We mold this guitar with
its head or with a standard surface to receive any head.

Lors du moulage on peut inclure dans le manche une âme métallique pour
empêcher toute flexion de oelui-ci sous la traction des cordes, me statique
faite' d'une plaque d'acier prise dans la longueur du manche entre le pont et
le fond de la coque ou âme dynamique placée dans le fond de la coque et tirant
par un filetage accessible à la tetewentre le noyau d'ancrage de la barre et
la tête.During molding, a metallic core can be included in the handle to
prevent any bending of it under the pull of the strings, static me
made of a steel plate taken in the length of the handle between the bridge and
the bottom of the hull or dynamic core placed in the bottom of the hull and pulling
by a thread accessible to the tetewentre the anchoring core of the bar and
the head.

Le modèle en tôle emboutie est constitué de deux coquilles soudées suivant
la longueur de l'instrument Ce modèle est fait d'une pièce, c'est à dire qu'
une coquille est le dessus ou le dessous- du pied du corps et de la tête de
l'instrument. Avant l'assemblage des: deux coquilles on garnit chacune d'une
butée soudée placée à la séparation du corps et du pied butée qui servira
à maintenir une cloison à l'intérieur de l'instrument.Puis on oolle un noyau
qui servira d'attache à la barre dans le fond de la coque. Ce noyau métallique
présente trois rainures sur sa longueur: une dans le fond de la coque qui lai
-sse passage à d'éventuels circuits et une à chacun des deux jonctions pont/
coque de façon à ce que la soudure se fasse sang être perturbée par le noyau.The stamped sheet metal model consists of two shells welded according to
the length of the instrument This model is made in one piece, that is to say that
a shell is the top or bottom of the foot of the body and the head of
the instrument. Before assembling the: two shells, each is filled with
welded stopper placed at the separation of the body and the foot stopper which will serve
to maintain a partition inside the instrument. Then we glue a core
which will serve as an attachment to the bar in the bottom of the hull. This metallic core
has three grooves along its length: one in the bottom of the shell which leaves
-sse passage to possible circuits and one at each of the two bridge junctions /
shell so that the weld is blood to be disturbed by the core.

La soudure est faite en commençant par la tête, puis de préférence simultané
-ment de chaque côté de façon à éviter toute déformation de l'instrument. Des
tubes sont soudés qui sreviront à amener les cordes de l'extrémité dulpied au
chevalet, les soudures se faisant en-deçà des butées de la cloison de façon
que les tubes n'aient pas à la traverser. Des trous sont percés pour l'ancra~
-ge de la barre avec filetage ou talonnette dans le fond et pour le passage
des potentiomètres et contacteurs le long de la coque sous la cuvette.Une for
-me moulée qui épouse les formes de la coques est collée à cet endroit de fa -çon à présenter une face plane à l'intérieur de l'instument pour recevoir
potentiomètres et contacteurs et à sortir à l'extérieur une langue-sous cha --que bouton de potentiomètre de façon à les- protéger du contact avec le corps
de l'instrumentiste pour ne pas les dérégler involontairement tout en les lais
- sant suffisamment dégarnis pour pouvoir les commander d'un doigts La forme
simple de l'instrument n'a pas de composant électroniques actifs. Alors les
micros et potentiomètres cablés sont mis en place. Les micros sont collés
sous le pont ou maintenus comme dans la version sophistiquée. Ensuite on met
en place la cloison contre les butées et on la rend étanche avec une pâte
résistante à la température du plomb fondu. Puis on place contre cette cloison
un tampon d'amiante pour faire bouclier thermique. Les potentiomètres sont
étanches et montés avec un joint, une petite boule de mastic est placée sur
les contacteurs et les ouvertures sur la tête pour les mécaniques couvertes
d'adhésif. Une forme épousant l'ouverture au pied et présentant un tube par
lequel passe un fil relié au fil du jack par un trou dans la cloison tube
conique' plus large prés de l'ouverture pour faire réserve pour le jack, dis -pose de trous qui maintiennent les tubes des cordes en place et un trou par
lequel on coule du plomb fondu après avoir plongé l'instrument dans l'eau.Welding is done starting with the head, then preferably simultaneously
-ment on each side so as to avoid any deformation of the instrument. Of
tubes are welded together which will bring the strings from the end of the foot to the
easel, the welds being made below the stops of the partition so
that the tubes do not have to cross it. Holes are drilled for the anchor ~
-bar bar with thread or heel in the bottom and for passage
potentiometers and contactors along the hull under the bowl.
- molded me which marries the shapes of the shells is glued to this place in order to present a flat face inside the instrument to receive
potentiometers and contactors and to exit outside a tongue-under each potentiometer button so as to protect them from contact with the body
of the instrumentalist so as not to disturb them involuntarily while leaving them
- healthy enough to be able to control them with one finger The shape
Simple instrument has no active electronic component. So the
wired microphones and potentiometers are installed. The microphones are glued
under the bridge or maintained as in the sophisticated version. Then we put
place the partition against the stops and seal it with a paste
resistant to the temperature of molten lead. Then we place against this partition
an asbestos pad to make heat shield. The potentiometers are
waterproof and mounted with a seal, a small ball of putty is placed on
contactors and head openings for covered mechanics
adhesive. A shape matching the opening at the foot and having a tube by
which passes a wire connected to the jack wire through a hole in the tube partition
conical 'wider near the opening to reserve for the jack, has holes that hold the tubes of the strings in place and a hole for
which is poured molten lead after submerging the instrument in water.

Après avoir retirer la forme on perce dans le plomb au centre de l'ouverture un trou qu'on taraude pour planter l'attache de la bretelle. Cette attache
est plus ou moins longue suivant la taille de' l'instrumentiste, et la posi -tion qu'il veut donner à son instrument. Cette attache maintient une pièce
de même taille que la forme qui ferme l'instrument, supporte le jack de sortie
et présente des trous face aux tubes des cordes pour y passer celles-ci ainsi
qu'un évidement pour recevoir leurs boules Dans la version sophistiquée, des batteries sont plaoées dans un profilé avec un chargeur à induction composé
d'un noyau magnétique', entouré d'un bobinage dont les pôles sont contre la
coque de sorte que pour recharger les batteries on place la guitare dans un
berceau où un circuit magnétique vient mettre ces pôles en face de ceux de la
guitare, où le chargeur est équipé d'un circuit qui dérive le courant de char
-ge vers un bruiteur qui lorsque les batteries sont pleines avertit l'usager.After removing the shape, we drill a hole in the lead in the center of the opening that we tap to plant the strap attachment. This fastener
is more or less long depending on the size of the 'instrumentalist, and the position he wants to give to his instrument. This fastener holds a part
same size as the shape that closes the instrument, supports the output jack
and has holes facing the tubes of the strings to pass them as well
as a recess to receive their balls In the sophisticated version, batteries are placed in a profile with a compound induction charger
a magnetic core ', surrounded by a coil whose poles are against the
shell so that to recharge the batteries we place the guitar in a
cradle where a magnetic circuit comes to put these poles in front of those of the
guitar, where the charger is equipped with a circuit which derives the tank current
-ge to a buzzer which when the batteries are full warns the user.

Ce profilé se place sous la rainure du noyau auquel il est fixé et monté dans
le manche où il se glisse sous une patte soudée à cet effet avant l'assembla-
-ge des coquilles. Un connecteur à l'extrémité du profilé dans la chambre des
micros reçoit un circuit maintenu de chaque côté par quatre piliers encastrés
dans celui-ci qui s'appuient sur le fond de la coque et deux sur chaque micro
maintenant ceux-ci contre le pont. La cloison présente un évidement et des rebords sur lesquels viennent s'appuyer une t8le en L qui épouse parfaitement
les parois du pied dégageant ainsi un espace dans lequel on met d'autres poten -tiomètres montés comme les autres sur une forme de meme type.Après le montage
de toute l'électronique, et la vérification de son fonctionnement on coule le) plomb et ferme comme précedemment. Si on veut démonter pour la réparer la gui -tare est mise à liteau mais cette fois tete en bas dans un bassin muni d'un
joint aux formes du pied de façon que celui-ci dépasse du fond et on attaque
le plomb au chalumeau. Les sillets sont munis de rainures oui trouvent leur
réplique exacte sur la tôle du pont alliant ainsi à leur collage la résistan -ce mécanique de l'imbrication des métaux. Les mécaniques- de tension
de cordes présentent sur leur chassis une matrice qui trouve sa réplique femel -le emboutie sur la tête de la coquille du dessous, empêchant les mécaniques de
tonrner et assurant une meilleure tenue mécanique à leur collage.This profile is placed under the groove of the core to which it is fixed and mounted in
the handle where it slides under a leg welded for this purpose before assembly
-shells age. A connector at the end of the profile in the chamber
microphones receive a circuit maintained on each side by four built-in pillars
in this one that lean on the bottom of the shell and two on each mic
now these against the bridge. The partition has a recess and edges on which come to rest an L-shaped t8le which fits perfectly
the walls of the foot thus freeing up a space in which we put other poten -tiometers mounted like the others on a form of the same type.
of all the electronics, and the verification of its operation, the lead is poured in and closed as above. If you want to dismantle it to repair it, the mistletoe is put on a batten but this time head down in a basin provided with a
joined to the shapes of the foot so that it protrudes from the bottom and we attack
lead with a blowtorch. The saddles have grooves yes find their
exact replica on the sheet metal of the bridge, thus combining the mechanical resistance of metal interlocking with their bonding. The mechanics of tension
ropes present on their chassis a matrix which finds its female replica - stamped on the head of the shell below, preventing the mechanics from
toning and ensuring better mechanical resistance to their bonding.

Le modèle en plastique comporte une. masse d'équilibrage en fonte maintenue
lors du moulage par le noyau de réserve de la cavité des micros et par une
tige mise en place là où viendra l'attache de la bretelle. Dans ce noyau sont
plantés les capteurs des micros qui se trouveront pris dans le pont lors du moulage, et il est lui-même maintenu par un appendice sortant du fond de la
coque et donnant forme à l1ouverture de la trappe d'accus à la cavité qui pré -sente un plan de joint pour que la trappe soit étanche.Le noyau fait deux em -placements pour les micros sous le pont, deux butées au fond de la coque de
chaque côté de la trappe et deux.: butées sous la cuvette de manière à pouvoir
placer un circuit imprimé entre le pont et la coque d'un coté de la trappe, une rainure dans le fond de la coque à chaque extrémité de la longueur de la
cavité de façon à y placer un circuit imprimé dont l'autre côté est tenu par une vis au bord de la trappe fixée dans le fond de la coque une bosse à I"ex- -trémité de la trappe qui reçoit la vis, la former nécessaire à la prise de la
masse d'équilibrage et une butée transversale ::sous la cuvette - associée à une butée sur l'intérieur de la la trappe qui auront toutes deux pour fonction
de maintenir la pile en place longitudinalement tandis que transversalement
elle est maintenue dans une feuille de plastique pliée stappuyant d'un côté
sur le,circuit imprimé puis sous la cuvette, puis après un repli passant sous
les potentiomètres opposés au circuit imprimé sur la butée du fond de la coque
opposée à celle du cirouit Le chevalet est une pièce métallique moulée mise
en place dans une rainure dans le pont à la limite du pied et du corps suffi -samment large pour recevoir un chevalet de droitier ou de gaucher sans modi
fication.Des trous faits au moulage par des aiguilles rétractiles traversent
la guitare de la rainure au chevalet: passant dans l'épaisseur du plastique
entre la cavité et la masse d'équilibrage, au-dessous de la coque où ils-- re-
joignent un évidement destiné à recevoir les boules extrémités des cordes. Un
deuxième-noyau crée une cavité dans le manche. I1 est maintenu par des appen
dices passant au travers du pont entre les sillets créant des trous sur les
-quels le moule du dessus imprime un rebord servant à maintenir des pastilles
qui boucheront les trous et serviront de repère des octaves et de leurs
divisions. La tête présente des trous faits au moulage pour recevoir les
mécaniques. Les trous ronds dans la partie supérieure sont matricés dans la
partie inférieure.Des fentes sont faites au moulage aux emplacements des
sillets pour recevoir leur lame de fixation. Dans- le cas de plastique manquant
de rigidité une âme de-tension statique peut entre introduite dans le manche.The plastic model has one. balancing weight in cast iron maintained
during molding by the reserve core of the microphone cavity and by a
rod in place where the strap attachment will come from. In this nucleus are
planted the pickups of the microphones which will be caught in the bridge during the molding, and it is itself maintained by an appendage protruding from the bottom of the
shell and giving shape to the opening of the battery door to the cavity which presents a joint plane so that the door is watertight. The core makes two places for the microphones under the bridge, two stops at the bottom of the shell of
each side of the hatch and two .: stops under the bowl so that
place a printed circuit between the deck and the hull on one side of the hatch, a groove in the bottom of the hull at each end of the length of the
cavity so as to place a printed circuit there, the other side of which is held by a screw at the edge of the hatch fixed in the bottom of the hull, a bump at the end of the hatch which receives the screw, forming it necessary to take the
balancing weight and a transverse stop :: under the bowl - associated with a stop on the inside of the hatch which will both have the function
keep the stack in place longitudinally while transversely
it is held in a folded plastic sheet that is pressed on one side
on the, printed circuit then under the bowl, then after a fold passing under
the potentiometers opposite to the printed circuit on the stop of the bottom of the hull
opposite that of the cirouit The easel is a molded metal piece placed
in place in a groove in the bridge at the limit of the foot and the body large enough to receive a right-handed or left-handed easel without modi
holes made by molding with retractable needles pass through
the guitar from the groove to the bridge: passing through the thickness of the plastic
between the cavity and the balancing mass, below the shell where they-- re-
join a recess intended to receive the balls ends of the strings. A
second-core creates a cavity in the handle. I1 is maintained by appen
dices passing through the bridge between the saddles creating holes on the
-which the top mold prints a rim used to hold pellets
which will plug the holes and serve as a benchmark for the octaves and their
divisions. The head has holes made in molding to receive the
mechanical. The round holes in the upper part are stamped in the
lower part. Slots are made in the molding at the locations of the
saddles to receive their fixing blade. In the case of missing plastic
of rigidity a static de-tensioning core can enter introduced into the handle.

Ce sera une lame métallique ajourée prise dans le noyau du manche de façon
qu'après son retrait elle soit prise entre le pont et le fond de la coque
sur toute la longueur du manche.It will be a perforated metal blade taken in the core of the handle so
that after its removal it is taken between the deck and the bottom of the hull
along the entire length of the handle.

Le modèle en métal coulé utilise deux noyaux au sable. L'un dans le manche
est maintenu par des appendices laissant des trous dans le pont, bouchés ensui -te par des pastilles marquant les divisions des octaves LPautre fait la
réserve de la cavité des micros et de la masse d7équtlibrage. fl est maintenu
par une tige mise en place au bout du pied là où viendra I1 attache de la
bretelle, par des mises en place là où viendront les capteurs du centre des
micros et par un appendice-faisant le trou de la trappe dans le fond de la coque sous la cuvette.Ce noyau détermine des logements pour les micros de part et d'autre de la cuvette, deux rebords survole fond de la coque de part et d'autre de la cuvette en face des premiers permettant de placer un circuit imprimé d'un côté ou d'un autre de la trappe entre le pont et le fond de la coque, un bosselage por recevoir la vis de la trappe, une rainure dans l'extrémité de la cavité côté tête au fond de la coque et une autre juste avant la masse d'équilibrage qui permettront d'y coincer des circuits imprimés dont l'autre extrémité est vissée au fond de la coque au bord de l'ouverture de la trappe, et un rebord sous le pont'- à la limite corps/pied qui permettra de couler la masse d'équilibrage en deux temps: guitare horizontale posée sur le pont le plomb est coulé jusqu'à la rainure du fond de la coque, le lest remplissant ainsi un espace maximum tout en laissant la place pour placer des potentiomètres. Avant la mise en place du lest, pour la sortie des cordes, des trous sont percés prés du pied en direction d'évidements faits au moulage sous le pied destinés à recevoir les boules extrémités des cordes tandïs que destrous sont faits dans ces évidements en direction des trous sur le pont de façon à placer des tubes rectilignes qui serviront de guide pour les cordes au travers du lest et de la cavité. La trappe présente deux butées pour tenir une batterie ou pile et une portée pour un joint d'étanchéité.The cast metal model uses two sand cores. One in the handle
is maintained by appendages leaving holes in the bridge, then plugged with pellets marking the divisions of the octaves LP Other makes the
reserve the microphone cavity and the balance mass. fl is maintained
by a rod placed at the end of the foot where I1 will attach the
ramp, by positioning where the sensors of the center of the
microphones and by an appendix-making the hole of the hatch in the bottom of the hull under the bowl. This core determines housing for the microphones on either side of the bowl, two edges fly over the bottom of the hull on both sides and on the other side of the bowl in front of the first allowing a printed circuit to be placed on one side or another of the hatch between the deck and the bottom of the hull, a boss to receive the screw of the hatch, a groove in the end of the cavity on the head side at the bottom of the hull and another just before the balancing weight which will make it possible to trap printed circuits there, the other end of which is screwed to the bottom of the hull at the edge of the opening of the hatch, and a ledge under the bridge'- at the body / foot limit which will allow the balance weight to flow in two stages: horizontal guitar placed on the bridge the lead is poured up to the bottom groove the hull, the ballast thus filling a maximum space while leaving room to place potentiom meters. Before the installation of the ballast, for the exit of the ropes, holes are drilled near the foot in the direction of recesses made in the molding under the foot intended to receive the balls ends of the tandais ropes that destrous are made in these recesses in direction holes on the bridge so as to place rectilinear tubes which will serve as a guide for the ropes through the ballast and the cavity. The hatch has two stops to hold a battery and a range for a seal.

Le modèle en bois comporte une âme métallique C'est une feuille d'acier ajourée de trous placée au milieu de la guitare sur toute sa longueur perpen -diculaire à la surface du pont et au fond de la coque. La guitare est alors composée de deux moitiés s'assemblant suivant le plan de l'an e et présentant des évidements pour recevoir l'âme, les micros,. les- potentiomètres et contac -teurs, le jack et la masse d'équilibrage.Avant assemblage tous les éléments sont cablés ensemble, et mis en place dans la moitié qui porte les' potentiomé -tres, l'âme collée à la masse d'équilibrage est enfilée sur les micror qui passent dans les trous de ll'âme et sont plaqués contre leurs capteurs, collés dans le pont, par des tampons élastiques placés entre eux et le fond de leur logement côté coque de façon à assurer une bonne continuité du circuit magnétique. Après assemblage la guitare est indémontable nécessitant pour réparation ou modification une opération laissant cicatrice.Une autre méthode d'assemblage consiste à faire la surface de jonction entre le pont et la coquet La coque est alors évidée pour recevoir l'âme et les autres éléments qui se disposent comme dans le modèle précédent. Tout est mis en place,- cablé, et l'âme collée. On recouvre ensuite du pont dont la surface de jonction avec la coque se prolonge sur le pied. Cette partie peut être en plusieurs morceau par exemple un morceau pour le pied et un morceau pour le pont. Une autre méthode permet d'avoir les micros accessibles sur le dessus du pont, l'âme passant alors sous les- micros, et étant alors composée de deux morceaux soudée ensemble: l'un, fin, fait la longueur du manche et l'autre plus épais passe sous les micros et est collé dans le pied. The wooden model has a metallic core. It is a sheet of steel with openwork holes placed in the middle of the guitar along its entire length perpenicular to the surface of the bridge and the bottom of the hull. The guitar is then composed of two halves assembling according to the plan of the year and having recesses to receive the soul, the microphones. the potentiometers and contactors, the jack and the balancing mass. Before assembly all the elements are wired together, and put in place in the half which carries the potentiometers, the soul stuck to the mass of balancing is threaded on the micror passing through the holes of the core and are pressed against their sensors, glued into the deck, by elastic pads placed between them and the bottom of their housing on the hull side so as to ensure good continuity of the magnetic circuit. After assembly the guitar is not removable requiring for repair or modification an operation leaving scar. Another method of assembly consists in making the junction surface between the bridge and the flirt The shell is then hollowed out to receive the soul and the other elements which arrange themselves as in the previous model. Everything is in place, - wired, and the soul glued. The deck is then covered, the junction surface of which with the hull extends over the foot. This part can be in several pieces for example a piece for the foot and a piece for the bridge. Another method makes it possible to have the microphones accessible on the top of the bridge, the core then passing under the microphones, and then being composed of two pieces welded together: one, end, is the length of the handle and the another thicker goes under the microphones and is stuck in the foot.

Toutes ces guitares décrites et dessinées de façon que Icurforme suive
l'espace occupé par les cordes, imposant aux capteurs des micros de se
resserer vers le centre des bobinages, peuvent être faites avec un léger
élargissement au niveau des micros de façon que ceux-ci soient des modèles
comme ceux fabriqués actuellement c'est à dire plus larges de deux épaisseurs
du'bobinage que le faisceau de cordes sous lequel ils sont placés et présentant des capteurs plongeant perpend.culairement au bobinage sous chaque cordez On
réalise ainsi des modèles; où les micros sont placés sur le dessus du pont dans
des logements prévus à oet effet pouvant être démontés sans avoir à ouvrir l'instument.All these guitars described and drawn so that Icurforme follows
the space occupied by the strings, requiring the pickups of microphones to
tighten towards the center of the windings, can be done with a light
enlargement of the microphones so that they are models
like those currently produced, ie two thicknesses wider
of the rewind as the bundle of strings under which they are placed and having sensors plunging perpendicularly to the winding under each string On
thus realizes models; where the microphones are placed on top of the bridge in
housings provided for this purpose that can be dismantled without having to open the instrument.

Un modèlec! p les mioros accessibles sur le dessus. En logement correspon- -dant aux bobinages, aux aimants et aux capteurs est aménagé sur le pont pour chaque micro qui sont alors fixés par collage ou par vissage, les vis se plaçant entre deux capteurs prenant prise dans le pont, ou les vis; maintenant une plaque en forme recouvrant les micros, prises dans le pont sur la périphérie du micro.Une cavité sous les micros permettant de placer des circuits électroniques et la masse d'équilibrage est accessible de l'extérieur par deux trappes l'une-pour les circuits l'autre pour la batterie.Des circuits de chaque coté de la trappe et de la dimension de l'ouverture sont maintenus d'un coté par leurs potentiomètres à axe démon -table et d'un autre par un contacteur placé dans le fond de la coque, leur angle libre étant coinoé entre pont et coque par une entretoise, Un circuit face à la trappe est maintenu par ses potentiomètres et de l'autre côté par son contacteur dans lequel il est vissé ou dans lequel il est maintenu par un tampon isolant placé sur la trappe qui est vissée avec un joint d1 étanchéité dans le fond de la coque.La trappe de la batterie découvre an boitier logement de la batterie vissé sur le dessus du pied et maintenant à une dé ses extrémités une plaquette dans laquelle un bobinage traversé par un noyau magnétique dont les extrémités débouchent sous le; pied de chaque côté de la trappe est connecté à un cirouit redresseur chargeur, aveo indication de fin de charge par une LED débouchant sur le dessus du pied ou par un bruiteur incorporé, branché à la batterie par deux plots situés sur la plaquette et venant toucher les lames du boitier servant de contact aux plots de la batterie. Une rainure court dans la longueur de 1 t instrument sous le pont, forçant dans le cas de réalisation serrée les aimants des micros à être en deux parties, sert au passage des fils entre les micros les contacteurs et les potentiomètres et jack non reliés au circuit. La batterie peut trouver son logement dans la base du manche permettant de loger un circuit supplémentaire ayant alors son connecteur placé dans le plafond du pied. A model! p the accessible mioros on the top. In housing corresponding to the windings, magnets and sensors is fitted on the bridge for each microphone which are then fixed by gluing or screwing, the screws being placed between two sensors taking hold in the bridge, or the screws; now a shaped plate covering the microphones, taken in the bridge on the periphery of the microphone. A cavity under the microphones allowing to place electronic circuits and the balancing mass is accessible from the outside by two hatches one for circuits the other for the battery. Circuits on each side of the hatch and the dimension of the opening are maintained on one side by their potentiometers with demon-table axis and on the other by a contactor placed in the bottom of the hull, their free angle being coined between deck and hull by a spacer, A circuit facing the hatch is maintained by its potentiometers and on the other side by its contactor in which it is screwed or in which it is maintained by an insulating pad placed on the hatch which is screwed with a seal in the bottom of the shell. The battery hatch discovers an battery housing case screwed on the top of the foot and now at one of its ends a plate in the which a coil crossed by a magnetic core whose ends open out under the; foot on each side of the hatch is connected to a charger rectifier circuit, with indication of end of charge by an LED opening on the top of the foot or by a built-in buzzer, connected to the battery by two studs located on the plate and coming to touch the blades of the case serving as contact for the battery studs. A short groove in the length of 1 t instrument under the bridge, forcing in the case of tight realization the magnets of the microphones to be in two parts, is used for the passage of the wires between the microphones the contactors and the potentiometers and jack not connected to the circuit . The battery can find its housing in the base of the handle allowing to accommodate an additional circuit then having its connector placed in the ceiling of the foot.

Ces guitares utilisen dans potentiomètres v axe démontable. Cet axe présente une languette-de section trapèzoidale qui se glisse dans la pièce qui commande les balais qui ont contact avec la piste résistante. Ii est maintenu au boitier du potentiomètre par un manchon fileté qui présente un joint torrique d'étanchéité, et assure la tenue du potentiomètre à la paroi sur laquelle il est monté avec un joint souple servant d'étanchéité et de compensation d'épaisseur entre celle de la paroi et celle définie par la longueur du manchon.Le touton du potentiomètre est alors monté fixe sur l'axe et présente des cannelures sur le manchon de façon qu'une clé spéciale s'enfile sur le bouton jusqu'aux cannelures du manchon permettant de dévisser celui-ci sans démonter le bouton. On réalise ainsi des potentiomètres simples et des potentiomètres à double inverseur ont un modèle est commandé par vissage de l'axe qui présente alors deux gorges dans lesquelles passe un ressort en épingle et appuie sur une rondelle isolante qui appuie sur le bosselage de part et d'autre de l'axe sur un plot face à leur fixation tandis que libres elles sont -a ef-2et ressort appuyées sur un autre plot. These guitars used in potentiometers v removable axis. This axis has a trapezoidal-section tongue which slides into the part which controls the brushes which have contact with the resistant track. It is held in the potentiometer housing by a threaded sleeve which has an O-ring seal, and ensures the holding of the potentiometer on the wall on which it is mounted with a flexible seal serving as a seal and thickness compensation between that of the wall and that defined by the length of the sleeve. The potentiometer is then mounted fixed on the axis and has grooves on the sleeve so that a special key is threaded on the button to the grooves of the sleeve allowing to unscrew it without removing the button. We thus realize simple potentiometers and potentiometers with double inverter have a model is controlled by screwing of the axis which then presents two grooves in which passes a hairpin spring and presses on an insulating washer which presses on the boss on both sides. 'other of the axis on a pad facing their attachment while free they are -a ef-2 and spring supported on another pad.

L'autre modèle présente une came sur la pie ce commandant les balais de la piste résistante, came quf appuie sur les lamelles et donne un cran à quand il arrive en fin de rotation.Les lamelles et les plots sur lesquels elles viennent en contact sont montéssur une pièce isolante qui vient s'emboiter sur le boitier bouchant ainsi les réserves faites dans celui-ci lors de son moulage pour ie passage et le libre mouvement ae oes lamelles
Le manchon de l'axe vient se visser dans une pièce métallique présentant une butée, qui avec celle de l'axe limite la rotation de celui-ci, et deux fils qui sortent sur le côté du boitier, qui sont soudés au circuit imprimé et servent de masse. Les fils des plots des lamelles qui passent dans des gor- -ges du boitier jusqu'au bout du potentiomètre opposé à l'axe peuvent être sortis de ces gorges permettant de souder le circuit imprimé en bout du potentiomètre ou sur le coté.The other model has a cam on the pie which controls the brushes of the resistant track, a cam which presses on the slats and gives a notch when it comes to the end of rotation. The slats and the studs on which they come into contact are mounted on an insulating part which fits on the case thus blocking the reserves made therein during its molding for the passage and the free movement of the strips
The sleeve of the axis is screwed into a metal part having a stop, which with that of the axis limits the rotation of the latter, and two wires which come out on the side of the case, which are soldered to the printed circuit and serve as mass. The wires of the lamella studs which pass through grooves in the housing until the end of the potentiometer opposite the axis can be taken out of these grooves making it possible to solder the printed circuit at the end of the potentiometer or on the side.

Planche l modèle en métal injecté avec séparation pont/coque
Planche 2 corps en métal injecté
Planche 3 modèle résine armée
Planche 4 modèle tole emboutie
Planche 5 modèle plastique injecté
Planche 6 modèle métal coulé
Planche 7 modèles en bois
Planche ô modèle à micros larges et démontables sur le dessus
Planche 9 potentiomètre à axe démontable et double inverseur par tirage
Planche 10 fig. 1 double inverseur par rotation pour potentiomètre
fig. 2 modèles de pieds e guitare un doigt servant d'attache de bretelle. Plate l model in injected metal with deck / hull separation
Plate 2 bodies in injected metal
Plate 3 armed resin model
Plate 4 stamped sheet model
Plate 5 injected plastic model
Plate 6 cast metal model
Plate 7 wooden models
Plate ô model with large microphones and removable on top
Board 9 potentiometer with removable axis and double inverter by pulling
Plate 10 fig. 1 double inverter per rotation for potentiometer
fig. 2 models of guitar feet and a finger serving as a strap attachment.

Claims

1-) Stick guitars characterized by the fact that:

These baton guitars are composed of a head where the mechanics are placed, a body made up of a shell forming the roundness under the neck and a bridge covering the shell on which the sills are placed, and a foot with a balancing mass. The bridge has a bowl, sagging of its surface below the sillets freeing up the place to attack the: ropes

The techniques described: for a particular model can pull used on another in the measurement of compatibilities The handle is the part of the body where the sillets are placed. The strap of the strap is inclined under the plane of the strings so as to compensate for the draw of the strap and to give the string plane a position parallel to the body of the instrumentalist.

2- Stick guitars according to claim 1, characterized in that:

A model in injected metal consists of a shell I forming the rounding of the handle, and a bridge 2 on which -are placed the sillets. These: two elements are assembled along a surface 3 by thermal bonding which allows the elements to be disassembled by heating the surface. The thermal adhesive is chosen so as to withstand the temperatures of ordinary and accidental use, and to yield without damaging the interior circuits.

A gluing and peeling machine is used in order to quickly, and locally heat up the bonding surfaces. It consists of a heating element which is placed on the deck exactly above the bonding surface. establishes perfect thermal contact and sealing allowing the bridge to be kept in contact with the heating element by atmospheric depression. The assembly is assembled so that bonding and take-off are only a simple press movement. There is a volume z in the shell where microphones 5 are placed held on notches 6 made in the wall, volume in which can place a circuit 7 plugged into a connector 8, provided between the microphones of potentiometers 9 with double inverter, controlled by pulling the axis which is removable, so as to exit this circuit by opening on the base of the instrument. upper part of the walls of this volume is bonding surface with the bridge. After this hollow volume, a full volume 10 allows the attachment bar ll of the instrument to be fixed on a core 12 set in this volume

A hole 13 is drilled for the passage of the bar on the chosen side (instrument for left-handed or right-handed) - Two channels 14 overlap this volume on either side of the core, above the passage of the bar, so as to allow passage to the electrical wires. Between these: channels, in their descent into the volume, two recesses 15 are housings for lugs holding to the bridge a connector electrically connecting the elements of the hull to those of the bridge. the upper part of this volume is a bonding surface with the bridges Between the two branches of the W formed by the axis of the tie bars. A

second volume 16 has a hole 17 in the bottom of the shell which delivers

passage to a connector 18 to recharge the batteries. This hole is enough

wide and inclined, so that this connector is a bolt supporting

the vertical instrument on a rack. A flange 19 makes it possible to place a pa-

King 20, delimiting a third volume: the battery chamber 211, access

siblespar a hatch 22, formed in the bottom of the hull. A second

fitted plate, as well as the first of the battery contacts, is supported

on another ledge, and in this way closes the room; batteries under

which passes the continuity of the channels of the electrical wires - covered at

this place of glued plates 23 - which open by joining in a

fourth hollow volume 24 closed by a molded partition with the shell .. you

beyond this partition 25 a hollow volume leads to the head of the ins

The upper part of the diaphragm walls of the volumes cited are on

bonding faces. A short wire in a channel 26 made in the surface of

collage of the fourth hollow volume at the head of the instrument where it is

connected to the baton 27 taking place between the two branches of the part 28

supporting the 'tension mechanics' of strings, to which it is stuck

electrically isolated to serve as an antenna for the audio signal produced

by the instrument.The bridge begins at the foot of the instrument where it closes the

surface 29 for bonding the shell with the foot and successively presents

the microphone sensor 'holes', then the tone sills

between which; we find, on the second octave, on either side of the nut

two '30 holes for placing sensitive contactors

lying on contact with a metal part (ignition key, nail or other,

but insensitive to finger and sweat) and lights up when contact

East. workbenches for switching trans circuits on / off

formation of the audio signal placed in the first hollow volume and the transmitter

placed in the fourth hollow volume, These contacts provided with lighting

of another color serve as charge and end-of-charge indicators for

battery At the first octave, two holes 31 on either side of the nut

oportent plugs allowing one to have access' to the crystal of the transmitter-

tor to change its frequency, 2other to the fifth hollow volume. The

bridge stops just before the saddle immediately after the mechanics The foot glued to the body presents the ropes, the bridge and the balance mass

The output jack and signal adjustment controls may be on

the foot. We then have a connector between the foot and the circuit of the first vo

lume, arranged so that it disconnects correctly when 1 "

tearing off the foot, and for this purpose the foot has a perpendicular wall

to this circuit, where the connector will be placed; they can also be on the

wall of the hull, at the level of the first volume. the microphones are of invoice

conventional, although the cores have beam axes, instead of being parallel this to combine the lack of space and the need for sufficient winding. Another system employs offset sensors: they emerge just under the ropes and plunge into the parallel coil between them. These sensors are then crimped to the bridge during molding, their part maintaining the translation of their axis molded in the bridge.

L returns the field to sensors fitted with: second coils. This microphone has either an output on the hull 'to circuits outside the. guitar; either pass its lead wires through the channels, until they reach the fifth volume, where the circuits are placed; a sound synthesizer controlled by a keyboard with keys; identical to that of the second octave, allowing to "type" the number corresponding to the chosen sound The guitarist will then have a ring with a small point allowing him to program his sound

The magnet is assembled by gluing3 to the coils. One of the microphones has additional windings around each sensor, in order to control a synthesizer. The magnet is then more trapped, and a magnetic profile in

3- Stick guitars according to claim 1, characterized in that:

A model in injected metal with a body open at both ends, the deck and the hull being one and the same piece. A core then makes the whole length of the body maintained in position relative to the mold at its two extremi. This core is torn off by the opening of the foot and then leaves a void in the body, bordered on each side by a groove near the bridge which will maintain a circuit over the entire length of the body, empty, and in which there are three zones : the handle at the end of which a recess will place a connector, the cavity of the microphones near the base, and between the two the place for the core on which the bar is fixed - volume which has parallel generatrices so that the core is a profile moroeau which is fixed by means of one or two screws placed between the sillets and covered with a pad used for - octave marking, core which presents under the bridge on both sides of the notches allowing the printed circuit to pass which makes the entire length of the instrument held by the grooves on the side of the hull near the deck. The core can be screwed under the shell, thus freeing up more space for the passage of the circuit. All the electric elements of the guitar are mounted on this circuit. The mioros have sensors placed in the bridge either during molding the part holding them in the mold is then machined to be at the level of the external surface of the bridge, or by drilling in bundle and set up by bonding or thermal wedging. The potentiometers cpntacteurs and possibly jack dismount their axis so as to remain welded to the circuit while allowing it to slide out of the body. In the case where eletric elements are mounted on the foot, a connector connected to the circuit is screwed into the bottom of the shell in a position where it will separate well from its counterpart on the foot during its corochage. a standard surface can be screwed: two legs of the foot then come against the bottom of the hull so that lbs-holes of this screwing give access each to a screw holding the bridge with the foot. The space available on the oircuit in the handle makes it possible to place fairly complex circuits there- the start-up of which uses the following device: a transparent patch with a magnetic rod-in its center is placed in the roundness of the handle so as to be visible from the instrwnentiste when he plays, and so that this pad does not create a surface discontinuity on the handle inside or outside; the printed circuit opposite this patch has an integrated circuit installed in a transparent housing and having the; following functions: a core which crosses it right through creates a sensitivity to a magnetic field of this circuit which connects / disconnects the circuits which it controls, while lighting an LED in its housing. A reference is stuck on this circuit so as to establish the continuity of the transparent mass and of the magnetic core with the eyes of the pad and the instrumentalist then has a ring or a bracelet which must be brought into contact of the pad to control the desired circuits while it can visualize by light the circuits which are connected.

These pads can also be the keys of a keyboard, possibly with a digital display visible on the handle, through a skylight, and giving the number of the chosen effect.

4- Stick guitars according to claim 1 characterized in that:

The fiberglass model is made with a mold in two shells that separate along the length of the instrument. We make a light, hollow core. or expanded foam that will fill the handle of the bar attachment to the head of the instrument. A second core which will be removed makes the cavity where the microphones and potentiometers will be housed. This core is held in position integral with the shell of the shell. This shell is filled with several layers of glass wool so that after having placed the cores one alternately folds over a layer coming from the right, a layer coming from the left so as to ensure around the cores a coating without discontinuity. Between the two aforementioned cores a third has been placed which will serve to anchor the fastening bar, but it paints to have been replaced by a woolen stuffing to see in the case of a solid core it can before its installation between fitted forms necessary for anchoring the bar so that during demolding there is only one cover to be blown up to gain access to the fixing hole of the bar. The second shell giving the shape of the bridge is put in place and the assembly which was horizontal for laying the glass wool is put in a vertical position, the head of the instrument at the bottom. The resin is then injected by the bottom until it reaches the top where protrudes glass wool which will not be taken in the resin and will be used for fixing the foot on the guitar. After solidification, we unmold and tear off the second core, releasing the cavity in which we will place microphones, potentiometers, jack wired together and other circuits if desired. Before placing these elements holes are drilled to receive them. For microphones, holes are drilled in a beam so as to place the sensors by bringing their axes close together in the guitar. These sensors are either the thickness of the laminate and come into contact with a metallic mass in the microphone which is then simply glued under the bridge, or protrude into the cavity and the windings of the microphones then thread onto it. Note here that the walls of the cavity have been covered with a conductive layer (paint or metallic foil) forming a shield.

Other holes pass right through the instrument in the vicinity of the foot so as to place tubes yes serve as tailpiece and bridge. The strings are threaded under the guitar by these tubes and come out on top where the tables cut into shape at their end and placed exactly serve as bridge. But before placing these tubes we fix the foot. This is the counterweight of the instrument and has the strap attachment. The free fiberglass at the end of the handle is placed in a hole in the foot and when everything is in position the resin is injected by one of the holes of the tailpiece tubes, while the other tubes are in place, connected electrically as well as with the metal mass of the foot and the shield and a wire coming out through one of the holes of the last tube to which it will be connected before 8be put in place. We tweak the junction between the foot and the handle and set up the saddles and mechanics. A non-removable instrument was thus produced which for repair or modification requires the opening of a hatch in the bottom of the shell with a saw. However, a version is produced where the mold has a shape for an access hatch in the bottom of the shell allowing access to the microphone cavity.

Similarly, another mold is equipped for making a hatch near the anchoring of the bar giving access to the core of the handle which is then equipped to receive batteries and / or electronic circuits. To anchor the strap attachment bar, either pierce the lid of the solid core or drill a hole at the bottom of which is stuck a sleeve with a screw or bayonet to receive the bar. This guitar is molded with its head or with a standard surface for reoevo: i any tette.

Sor2 of the molding one can include in the handle a metallic core to prevent any bending of this one under the traction of the cords9 static core made of a steel plate taken in the length of the handle between the bridge and 1 bottom of the hull or dynamic core placed in the bottom of the hull and pulling by a thread accessible to the head, between the anchoring core of the bar and the tette.

5- Stick guitars according to claim 1 characterized in that quet

The stamped sheet model consists of two welded shells

the length of the instrument. This model is made in one piece, that is to say that

a shell is the top or bottom of the foot of the body and the head of

the instrument. Before assembling the two shells, each is filled with

welded stopper placed at the separation of the body and the foot t stopper which will serve

maintain a partition inside the instrument. Then we stick a drowning

which will serve as an attachment to the bar in the bottom of the hull.

has three grooves along its length: one in the bottom of the shell which

-sse passage to possible 'circuits and one at each of the two bridge junctions

shell so that the welding is done without; etroe, disturbed by the nucleus

The welding is done starting with the heads then preferably simultaneous

-ment of each side. ' so as to avoid any deformation of the instrument. Of

tubes are welded which will be enough to bring the: cords from the end of the foot to

easel, the welds being made below the stops of the partition so

that the tubes do not have to pass through. Holes are drilled for the anchor

-bar bar with thread or bayonet at the bottom and for passage

potentiometers and contactors along the hull under the bowl. A f

-molded which matches the shapes of the, shell, is glued to this place so as to present a flat face inside the instrument to receive

potentiometers and contactors and to exit outside a language under each potentiometer button so as to be; protect from contact with the body

of the instrumentalist so as not to inadvertently disrupt them while

- healthy enough to be able to control them with one finger The shape

Simple instrument has no active electronic component. So the

wired microphones and potentiometers are installed. The microphones are glued

under the bridge or maintained as in the sophisticated ve-rsion. Then we put

in place the oloison against the stops and we seal it with a paste

resistant to the temperature of molten lead. Then we place against this partition

an asbestos pad to make a heat shield. The potentiometers are

waterproof and mounted with a seal, a small ball of putty is placed on

contactors and head openings for covered mechanics'

adhesive. A shape matching the opening at the foot and having a tube by

which passes a wire connected to the jack wire through a hole in the partition, tube

wider cynic near the opening to reserve for the jack, say

- has holes that hold the tubes of the ropes in place and a hole by

which is poured molten lead after submerging the instrument in water.

shell so that to recharge the batteries we place the guitar in a cradle and a magnetic circuit comes to put these poles in front of those of the .guitare, where the charger is equipped with a circuit which derives the charging current -ge to a buzzer which, when the batteries are full, alerts the user.

a magnetic core surrounded by a coil whose poles are against the

that a recess to receive their balls. the sophisticated version, batteries are placed in a profile with a compound induction charger

and has holes facing the tubes of the strings to pass them as well

same size as the shape that closes the instrument, supports the spell jack

-tion he wants to give to his instrument This fastener holds a part

is more or less long depending on the size of the instrumentalist, and the posi

a hole that is tapped to plant the strap attachment. This fastener

After removing the form we pierce in the lead in the center of the opening

turning and ensuring better mechanical resistance to their bonding.

ropes present on their chassis a matrix which finds its female replica - stamped on the head of the shell below. preventing the mechanics of

replica exaote on the sheet metal of the bridge thus combining with their bonding the mechanical resistance of the interweaving of metals. The tension mechanics

joined to the shapes of the foot so that it protrudes from the bottom and the lead is attacked with a blowtorch. The saddles have grooves which find their

of all the electronics, and the verification of its operation we sink the lead and close as before. If we want to disassemble to repair it the mistletoe is put in the water but this time head down in a basin fitted with a

the walls of the foot thus freeing up a space in which one puts other poten -tiometers mounted like the others on a form of the same type. After mounting

now these against the bridge. The partition has a recess and edges on which an L-shaped sheet rests which fits perfectly

in this one which are based on the bottom of the shell and two on each microphone

mioros receives a circuit maintained on each side by four built-in pillars

the handle where it slides under a leg welded for this purpose 'before the assembly of the shells. A connector at the end of the profile in the chamber

This profile is placed under the groove of the core to which it is fixed and mounted in

a screw at the edge of the hatch. fixed - in the bottom of the hull a bump at the end of the hatch which receives the screw, the form necessary for taking the balancing mass and a transverse stop under the bowl - associated with a stop on the inside of the hatch which will both have the function of holding the stack in place longitudinally while transversely it is held in a folded plastic sheet resting on one side on the printed circuit then under the bowl, then after a fold passing under the potentiometers opposite the printed circuit on the stop of the bottom of the shell opposite to that of the circuit. The easel is a molded metal piece placed in a groove in the bridge at the limit of the foot and the body large enough to receive a right-handed or left-handed easel without modification. the guitar from the groove to the bridge: passing through the thickness of the plastic between the cavity and the balancing mass, below the shell where they 'join a recess intended to receive the: balls ends; some ropes. A second core creates a cavity in the handle. I1 is maintained by appendages passing through the bridge between the sillets creating holes on which -the top mold prints a rim used to maintain pellets which will plug the holes and will serve as a reference for the octaves and their divisions. The head has holes made in the molding to receive the mechanics, the round holes in the upper part are stamped in the lower part. Slots are made in the molding at the locations of the sills to receive their fixing blade. In the case of plastic lacking rigidity a core of static tension can be introduced into the handle.

cavity so as to place a printed circuit there, the other side of which is held by

place a printed circuit between the deck and the hull of a side of the hatch, a groove in the bottom of the hull at each end of the length of the

each ctd of the hatch and two stops under the bowl so that

shell and giving shape 8 the opening of the access hatch to the cavity which presents a joint plane so that the hatch is watertight The core makes two locations for the microphones under the bridge, two stops at the bottom of '' hull

molding, and it is itself held by an appendage protruding from the bottom of the

planted the pickups of the microphones which will be caught in the bridge during the

rod placed where the strap attachment will come from, In this core are

during molding by the reserve core of the microphone cavity and by a

Plastic model has a maintained fonto balancing weight

It will be a perforated metal blade taken in the core of the handle so that after its removal it is taken between the deck and the bottom of the hull over the entire length of the handle.

6- Guitar-sticks according to claim 1, characterized in that:

The cast metal model uses two sand cores. One in the handle

is maintained by appendages; leaving tfous in the bridge, blocked then by pellets marking the divisions of the octaves. The other is doing the

reserve of the microphone cavity and the balancing mass, It is maintained

by a rod placed at the end of the foot where the strap attachment will come from, by positions where the sensors come from the center of the

microphones and by an appendix making the hole of the hatch in the bottom of the

shell under the bowl. This core determines housings for the microphones of

on either side of the bowl, two edges on the bottom of the shell on both sides

on the other side of the bowl in front of the first allowing to place a circuit

printed on one side or another of the hatch between the deck and the bottom of the

shell, a boss to receive the hatch screw, a groove in

the end of the cavity on the head side at the bottom of the shell and another just

before the balancing weight which will allow printed circuits to be stuck there

the other end of which is screwed to the bottom of the hull at the edge of the hatch opening, and a ledge under the bridge at the body / foot limit which will allow the balance weight to flow in two stages: horizontal guitar placed on the deck the lead is poured up to the groove - from the bottom of the hull, the ballast thus filling a maximum space while leaving room to place potentiometers. Before the installation of the ballast, for the exit of the ropes, holes are drilled near the foot in the direction of recesses made in the molding under the foot intended to receive the balls ends of the ropes while des- holes are made in these recesses in the direction of the holes on the deck so as to place straight tubes which will serve as a guide for the ropes through the ballast and the cavity. The hatch has two stops to hold a battery and a range for a seal.

7- Stick guitars according to claim 1, characterized in that:

The wooden model has a metallic core. It is a perforated steel sheet of holes placed in the middle of the guitar over its entire perpen-dioular length on the surface of the bridge and at the bottom of the hull. The guitar is then: composed of two halves assembling along the plane of the core and having recesses to receive the core, microphones, potentiometers and contactors, the jack and the balance weight. Before assembling the good elements: are wired together, and put in place in the half which carries the potentiometers, the core glued to the balance mass is threaded onto the micros' which pass through the holes of the 'soul and are pressed against their sensors, glued in the bridge, by elastic pads placed between' them and the bottom of their housing on the shell side so as to ensure good continuity of the magnetic circuit., Apures assembly the guitar is not removable requiring for repair or modification of an operation leaving a scar. Another method of assembly consists in making the surface of Junction between the bridge and the hull. The hull is then hollowed out to receive the core and the other elements which are arranged as in the previous model. Everything is set up, wired, and the soul glued. We then cover the bridge whose junction surface with the hull 'extends' on the foot. This 'part can be in several pieces, for example a piece for the foot and a piece for the bridges Another' method allows have the microphones accessible on the top of the bridge, the core then passing under 'les- micros', and then being composed of two pieces welded together: one, thin, the length of the handle and the other thicker pass under the microphones and is stuck in the foot.

8- Stick guitars according to claims 1,2,3,4,5,6,7 characterized by the fact that all oes guitars described and drawn so that their shape follows the space occupied by the strings, imposing on the pickups microphones to tighten towards the center of the windings, - can be made with a widening at the level of the microphones so that these are models like those currently manufactured, that is to say wider by two 'thicknesses of the winding than the bundle of ropes under which they are placed and presented sensors plunging perpendicular to the winding under each rope.

9- Stick guitars according to claims I & 8 characterized by the fact

that a model has the accessible mioros on top. A housing corresponding to the windings, the magnets and the sensors is fitted on the bridge for each microphone which are then fixed by gluing or by screwing the screws placed between two sensors taking hold in the bridge, or the screws; now a shaped plate covering the microphones taken in the bridge on the periphery of the mioro.A cavity under the microphones allowing to place electronic circuits and the balancing mass is accessible from the outside by two hatches one for the circuits , the other for the battery. Circuits on each side of the hatch and of the dimension of the opening are maintained on one side by their potentiometers with demAor- -table axis and on the other by a contactor placed in the bottom of the hull, their free angle being wedged between deck and hull by a spacer. A circuit facing the hatch is maintained by its potentiometers and on the other side by its contactor in which it is screwed or in which it is maintained by an insulating pad placed on the hatch which is screwed with a seal in the bottom of the hull. a battery door discovers one.

battery housing screwed on the top of the foot and now at one of its ends a plate in which a winding crossed by a magnetic core whose ends open under the foot on each side of the hatch is connected to a rectifier charger circuit, with indication of end of charge by an LED opening on the top of the foot or by a built-in buzzer, connected to the battery by two studs located on the plate and coming to touch the blades of the case serving as contact for the studs of the battery. A short groove in the length of the instrument under the bridge, forcing in the case of tight realization the magnets of the microphones to be in two parts, is used for the passage of the wires between the Eicros the contactors and the potentiometers and jack not connected to the circuit . The battery can find its housing in the base of the handle allowing to accommodate an additional circuit having. then its connector placed in the ceiling of the foot.

10- Stick guitars according to claims l, 2,3,4,5,6,7,8, & caractéri

sated by the fact that they have potentiometers with removable axis. This axis

has a trapezoidal section tongue which slides into the part which controls the brushes which make contact with the resistance track. It is held in the potentiometer housing by a threaded sleeve which has a sealing O-ring, and ensures the holding of the potentiometer. to the wall on which it is mounted with a flexible seal serving as a seal and compensation for thickness between that of the wall and that defined by the length of the sleeve. The potentiometer button is then fixedly mounted on the base and has grooves on the sleeve so that a special key is threaded on the button to the grooves of the sleeve allowing it to be unscrewed without removing the button. thus realizes simple potentiometers and potentiometers with double inverter of which a model is controlled by screwing the axis which then presents two grooves in which passes a hairpin spring and presses on an insulating washer yes presses on the boss on both sides other of the axis on a stud facing their fixing while free they are by spring effect supported on another stud.

The other model has a cam on the part controlling the brushes of the resistant track, a cam which presses on the slats and gives a notch to the axis when it reaches the end of rotation. in contact are mounted on an insulating part which comes to fit on the case thus blocking the reserves made therein during its molding for the passage and the free movement of these strips.

The sleeve of the axis comes to be screwed in 'a metal part presenting a stop, which with that of the axis limits the rotation of this one, and two they which go out on the side of the case, which are soldered to the printed circuit 'and serve as mass. The wires of the lamella studs which pass through garages of the case up to the end of the potentiometer opposite the axis can be removed from these grooves which allow the printed circuit to be soldered at the end of the potentiometer or on the side. .