CH361821A

CH361821A - Typewriter variable spacing device

Info

Publication number: CH361821A
Authority: CH
Inventors: Salto Rinaldo
Original assignee: Olivetti & Co Spa
Priority date: 1958-07-26
Filing date: 1959-08-01
Publication date: 1962-05-15
Also published as: GB869722A

Description

Dispositif d'espacement variable pour machirre ä ecrire L'invention a pour objet un dispositif d'espace- ment variable pour machirre ä 6crire comprenant dune part un organe d'echappement avangant sous Faction d'un ressort et normalement en prise avec des dents mobiles et, d'autre. part, des moyens pour d6gager ces dents et les faire accomplir une course variable en arriere par rapport ä la direction d'avan- cement de Forgane d'6chappement. The subject of the invention is a variable spacing device for a writing jaw comprising, on the one hand, an escapement member advancing under the action of a spring and normally engaged with movable teeth. and other. on the other hand, means for disengaging these teeth and causing them to perform a variable stroke backwards with respect to the direction of advance of the exhaust member.

Dans les dispositifs de ce type connus, la course variable des dents mobiles, est contröl6e par un jeu d'eMments de s & ction qui prennent leurs positions lors de Fenfoncement dune touche, apres quoi les dents mobiles se d6gagent sous Faction de 1'usuel cadre universel commande par les barres ä carac- teres, imm6diatement avant la frappe. In known devices of this type, the variable travel of the mobile teeth is controlled by a set of selection elements which assume their positions when a key is pressed, after which the mobile teeth disengage under the action of the usual universal frame controlled by character bars, immediately before typing.

Les moye-ns de commande de ces dispositifs necessitent un laborieux reglage. The means of control of these devices require laborious adjustment.

Dans un dispositif comm un element de sElection peut, en plus, etre actionne par ledit cadre universel pour d6gager lesdits moyens. In a common device, a selection element can, in addition, be actuated by said universal frame to disengage said means.

Dans ce but chaque membre de s61ection peut cooperer avec un e16ment darret des dents mobiles, de Borte que des jeux indesirables peuvent surgir entre 1'616ment de s & ection et 1'61ement darret cor- respondant. For this purpose each selection member can cooperate with a stopping element of the movable teeth, since undesirable clearances can arise between the selection element and the corresponding stopping element.

En outre les Elements de s61ection se d6placent d'abord dans une premiere direction afin de contröler la course variable des dents mobiles, puis dann une deuxieme direction afin de d6gager ces dents, ce qui implique un m & anisme comphque. In addition, the selection elements move first in a first direction in order to control the variable stroke of the mobile teeth, then in a second direction in order to disengage these teeth, which implies a complex mechanism.

La presente invention se propose d'eliminer tous ces desavantages. The present invention proposes to eliminate all these disadvantages.

Le dispositif suivant Finvention est caracteris6 par un jeu d'el6ments, actionnables s6lectivement, qui dans une Beule course, d6gagent lesdites dents mo biles et se placent de maniere ä fixer la course variable de ces dents. Le dessin annexe represente, ä titre d'exemple, deux formes d'exkution de Fobjet de 1'invention. The device according to the invention is characterized by a set of elements, which can be selectively actuated, which, in a single stroke, disengage the said movable teeth and are placed in such a way as to fix the variable stroke of these teeth. The accompanying drawing shows, by way of example, two embodiments of the object of the invention.

La fig. 1 est une vue partielle, en perspective, de la premiere forme d'execution incorporee ä une ma chirre ä 6crire ; la fig. 2 est une vue partielle en plan du dis- pösitif de la fig. 1 ; la fig. 3 est une coupe longitudinale droite du dispositif de la fig. 1 ; la fig. 4 est une vue partielle, en perspective, de la seconde forme d'ex6cution. fig. 1 is a partial view, in perspective, of the first form of execution incorporated into a writing machine; fig. 2 is a partial plan view of the device of FIG. 1; fig. 3 is a straight longitudinal section of the device of FIG. 1; fig. 4 is a partial view, in perspective, of the second embodiment.

La premiere forme d'execution comprend une cr6maillere 4, qui constitue Forgane d'echappement, fixee sur 1e chariot de la machirre ä 6crire. Cette cremaillere 4 est constamment pouss6e dans la direc- tion de la Flache 5 par un ressort qui n'a pas 6t6 repr6sente sur 1e dessin. > The first embodiment comprises a rack 4, which constitutes the escapement member, fixed to the carriage of the typewriter. This rack 4 is constantly pushed in the direction of the wane 5 by a spring which has not been shown in the drawing. >

La cremaillere 4 presente un pas multiple, plus precisement triple du pas elementaire d'espacement, et est normalement en prise avec un jeu de trois dents mobiles 6, 7 et 8 eloignees Fune de 1'autre d'un pas elementaire (fig. 2). Ces dents peuvent se d6gager de la cremaillere pour accomplir une course variable en arriere par rapport ä la direction de la fleche 5. Dans ce but elles sont munies chacune dune ouver- ture allongee 9 parallele ä la cremaillere 4 par Finter- m6diaire de laquelle elles sont h6es ä un axe fixe 10. La dent inf6rieure 8 est munie d'un pivot 11 qui s'engage dans une seconde ouverture 12 de chacune des dents 6 et 7. Des ressorts 13 tendent ä maintenir en prise les dents 6, 7 et 8 avec la cr6maillere 4. Lorsqu'on fait tourner les dents autour de Faxe 10 pour les degager de la cr6maillere, elles ont tendance ä se d6placer dune course variable parallelement ä la cremaillere 4 en direction inverse de la fleche 5. The rack 4 has a multiple pitch, more precisely triple the elementary spacing pitch, and is normally engaged with a set of three mobile teeth 6, 7 and 8 spaced apart from each other by an elementary pitch (fig. 2 ). These teeth can disengage from the rack to accomplish a variable stroke backwards with respect to the direction of the arrow 5. For this purpose they are each provided with an elongated opening 9 parallel to the rack 4 through the intermediary of which they are attached to a fixed axis 10. The lower tine 8 is provided with a pivot 11 which engages in a second opening 12 of each of the tines 6 and 7. Springs 13 tend to keep the tines 6, 7 and 7 in engagement. 8 with the rack 4. When the teeth are rotated around Faxe 10 to disengage them from the rack, they tend to move by a variable stroke parallel to the rack 4 in the opposite direction to the arrow 5.

Le pivot 11 permet aux trois dents de se deplacer solidairement entre elles parallelement ä la cr6mail- lere. Quelle que soit la dent en Prise avec la cr6mail- lere, les trois dents 6, 7 et 8 sont maintenues, ap- puyees contre laxe fixe 10. Les ouvertures 12, per- mettent ä chaque dent d'effectuer une rotation independante des autres deux dents autour de Faxe 10, de maniere ä pouvoir entrer individuellement entre deux dents de la cremaillere 4. The pivot 11 allows the three teeth to move integrally with each other parallel to the rack. Whatever the tooth in engagement with the rack, the three teeth 6, 7 and 8 are maintained, supported against the fixed axis 10. The openings 12, allow each tooth to perform an independent rotation of the others. two teeth around Faxe 10, so as to be able to enter individually between two teeth of the rack 4.

Aux fig. 1 et 2 la cr6maillere 4 est en Prise par sa dent 14 avee la dent interm6diaire 7. La dent 6 s'appuie Sur 1e dos de la dent 15 de la cremaillere, tandis que la dent 8 s'appuie Sur 1e dos de la dent 14. In figs. 1 and 2 rack 4 is engaged by its tooth 14 with intermediate tooth 7. Tooth 6 rests on the back of tooth 15 of the rack, while tooth 8 rests on the back of tooth 14.

Chaque dent est dimensionn6e de facon ä sup- porter les chocs r6petes. Each tooth is sized to withstand repeated shocks.

Le dispositif comprend en outre un jeu d'e16- ments de s61ection 19 qui peuvent etre actionnes selectivement de facon telle que Jans une seule course ils degagent les dents mobiles de la cr6mail- lere et se placent de maniere ä fixer la course variable de ces dents. Chaque el6ment 19 est forme par 1'extremite superieure d'un levier 20 d'un jeu de leviers adjacents, ax6s Sur un pivot 21 fixe Sur une Plaque 22. Chaque e16ment 19 peut coop6rer avec un Profil de commande de chacune des dents mobiles. Ledit Profil comporte, dans Fordre, suivant la direction de la fleche 5, un Bord rectiligne de glissement 16, une encoche 17 et un 6paulement 18. The device further comprises a set of selection elements 19 which can be selectively actuated in such a way that in a single stroke they disengage the mobile teeth of the rack and are placed in such a way as to fix the variable stroke of these teeth. teeth. Each element 19 is formed by the upper end of a lever 20 of a set of adjacent levers, ax6s On a pivot 21 fixed On a plate 22. Each e16ment 19 can cooperate with a control Profile of each of the mobile teeth. Said Profile comprises, in order, in the direction of the arrow 5, a straight sliding edge 16, a notch 17 and a shoulder 18.

Les leviers 20 sont distants d'un pas elementaire. Le bras horizontal de chaque levier 20 est reli6 ä un levier 30 (fig. 3) monte rotativement sur un pivot 31 fix6 Sur la Plaque 22 et soumis ä Faction d'un ressort 32. Chaque levier 30 est ä son tour reli6 par un tirant 33 ä une Barre universelle 34, 35 pivotant en 36. Les Barres universelles 34 peuvent etre actionn6es selectivement par des poussoirs 37 contröl6s par des touches du clavier. The levers 20 are separated by an elementary pitch. The horizontal arm of each lever 20 is connected to a lever 30 (fig. 3) rotatably mounted on a pivot 31 fixed to the plate 22 and subjected to the action of a spring 32. Each lever 30 is in turn connected by a tie rod 33 to a Universal Bar 34, 35 pivoting at 36. The Universal Bars 34 can be actuated selectively by pushers 37 controlled by keyboard keys.

Lors de Fenfoncement dune tauche 1e poussoir 37 correspondant est deplac6 vers la Bauche de facon que sa saillie 38 engage une Barre universelle 34, qui par 1e tirant 33 et 1e levier 30 fait tourner Jans 1e sens inverse des aiguilles dune montre 1e levier de selection 20 correspondant. L'extremite 19 coopere alors successivement avec 1e Bord 16 de maniere ä faire tourner solidairement les trois dents mobiles 6, 7 et 8 autour de Faxe 10 et les & gager de la cr6- maillere 4, puis s'introduit dans 1e pas de 1'6paulement 18 pour arreter la course variable des dents mobiles. When a button is pressed, the corresponding pusher 37 is moved towards the Bauche so that its projection 38 engages a universal bar 34, which through the tie rod 33 and the lever 30 rotates the selection lever 20 counterclockwise. corresponding. The end 19 then cooperates successively with the first edge 16 so as to cause the three movable teeth 6, 7 and 8 to rotate together around the axis 10 and engage them in the rack 4, then enters the first pitch of 1 '6shoulder 18 to stop the variable stroke of the mobile teeth.

Lors de leur d6gagement les dents mobiles se d6placent solidairement entre elles saus 1'action des ressorts 13 vers la droite. Dans ce mouvement elles sont guiddes par 1'extr6mite 19 du levier 20 qui a contourn6 1e Bord 16 de leur Profil de commande. During their release, the mobile teeth move integrally with each other without the action of the springs 13 to the right. In this movement they are guided by the end 19 of the lever 20 which has bypassed the first edge 16 of their control profile.

Lorsque Fencoche 17 des dents 6, 7 et 8 parvient en correspondance avec 1'extremitd 19, 1'6paulement 18 est arrete par cette extramit6 apres une course variable desdites dents determin6es par 1e levier 20 qui a tourn6, et Fencoche 17 permet aux dents de revenir en Prise avec la cremaillere 4 saus Faction des ressorts 13. Par 1'inertie du chariot les dents reviennent en Prise avec la cremaillere avant que celle-ci se mette en mouvement. Lorsque 1e levier 20 est rappele par son ressort 32, la cremaillere 4 saus Faction de son ressort, rappelle les dents vers la Bauche jusqu'ä ce qu'elles s'arretent contre Faxe 10. When notch 17 of teeth 6, 7 and 8 comes into correspondence with end 19, shoulder 18 is stopped by this end after a variable travel of said teeth determined by lever 20 which has turned, and notch 17 allows the teeth to come back into engagement with the rack 4 without the action of the springs 13. By the inertia of the carriage the teeth come back into engagement with the rack before the latter starts moving. When the first lever 20 is recalled by its spring 32, the rack 4, without the action of its spring, recalls the teeth towards the Bauche until they stop against the faxe 10.

Il va sans dire que la course de la cremaillere 4 est arretee par la dent 6, 7 ou 8 qui se trouve 1e plus pres de la surface anterieure dune dent de la cre- maillere. Le d6placement total effectue par la cre- maillere est par consequent Egal ä la course arriere des dents mobiles correspondant ä la Position du levier 20 ayant tourne. Notamment les quatre leviers 20 de la fig. 1 font accomplir ä la eremaillere, ä partir du levier 20 de Bauche, 2, 3, 4, respectivement 5 pas 61ementaires. It goes without saying that the travel of the rack 4 is stopped by the tooth 6, 7 or 8 which is closest to the front surface of a tooth of the rack. The total displacement effected by the rack is therefore equal to the rearward stroke of the movable teeth corresponding to the position of the lever 20 having rotated. In particular the four levers 20 of FIG. 1 make the remailler perform, from the lever 20 of Bauche, 2, 3, 4, respectively 5 elementary steps.

Les Barres universelles 34 effectuent par cons6- quent simultan6ment la s & ction de Fespacement et Factionnement de 1'6chappement. La Barre univer selle actionn6e habituellement par les Barres ä carac- teres est eliminee. En plus dans une machirre ä 6crire 61ectrique 1e poussoir 37 peut eire actionn6 dune maniere connue par 1e rouleau usuel tournant, de Sorte que, outre 1e dispositif d'impression, les leviers de s61ection 20 sont actionnes par 1e moteur, et ceci sans que la chaine cinematique desdits leviers se complique. The Universal Bars 34 therefore simultaneously effect the selection of the spacing and the actuation of the escapement. The Universal Bar normally operated by Character Bars is eliminated. In addition, in an electric writing machine, the pusher 37 can be actuated in a known manner by the usual rotating roller, so that, in addition to the printing device, the selection levers 20 are actuated by the motor, and this without the kinematic chain of said levers is complicated.

Les poussoirs 37 sont de plus munis dune deuxieme saillie 39 qui intervient de la facon usuelle dans la frappe des majuscules dans 1e but de tenir campte de la difference d'espacement des deux carac- teres mont6s Sur la meme Barre, laxe 36 etant monte Sur la corbeille ä deplacement vertical. The pushers 37 are further provided with a second projection 39 which intervenes in the usual way in the typing of capital letters with the aim of taking account of the difference in spacing of the two characters mounted on the same bar, the axis 36 being mounted on the vertically moving basket.

Afin d'eviter des dommages lorsque les dents 6, 7 et 8 ne se remettent pas en Prise avee la cremaillere avant que celle-ei se mette en mouvement, une dent fixe 28 est mont6e Sur Faxe 10 saus les dents mobiles 6, 7 et B. Cette dent 28 est contrölee par un levier 24 monte Sur un pivot 23 de la Plaque 22 et est munie d'un butoir 25 qui, saus 1'action d'un ressort 27, tend ä s'appuyer contre 1e Bord droit dune ouverture 26 de chacun des leviers 20 (fig. 3). La dent fixe 28 est normalement degagee de la cremaillere 4 par Faction du ressort 27 qui prevaut Sur Faction du ressort 29. In order to avoid damage when the teeth 6, 7 and 8 do not reengage with the rack before the latter begins to move, a fixed tooth 28 is mounted on the machine 10 without the mobile teeth 6, 7 and B. This tooth 28 is controlled by a lever 24 mounted on a pivot 23 of the Plate 22 and is provided with a stopper 25 which, under the action of a spring 27, tends to bear against the right edge of a opening 26 of each of the levers 20 (fig. 3). The fixed tooth 28 is normally disengaged from the rack 4 by the action of the spring 27 which prevails over the action of the spring 29.

Lorsqu'un levier 20 pivote dans 1e sens con- traire des aiguilles dune montre, saus Faction du butoir 25, il fait tourner 1e levier 24 dans 1e sens des aiguilles dune montre. La dent fixe 28 est alors degag6e et vient en Prise, saus Faction du ressort 29, avec la cremaillere 4.RTI ID="0002.0543" WI="4" HE="4" LX="1483" LY="2078"> Le mouvement que la cr6mail- lere 4 peut alors effeetuer avant de venir en Prise avec les dents 6, 7 et 8, peut eire arrete apres une course au maximum de trois pas 61ementaires, ce qui supprime taut risque de dommage au dispositif. Lorsque 1e levier 20 est rappele, 1e ressort 27 d6gage la dent fixe 28, et la cremaillere 4 est alors soumise au contr6le des dents mobiles. When a lever 20 rotates counterclockwise, without the action of the stopper 25, it rotates the lever 24 clockwise. The fixed tooth 28 is then disengaged and comes into engagement, except the action of the spring 29, with the rack 4.RTI ID="0002.0543" WI="4" HE="4" LX="1483" LY="2078"> The movement that the rack 4 can then perform before coming into engagement with the teeth 6, 7 and 8 can be stopped after a travel of a maximum of three elementary steps, which eliminates any risk of damage to the device. When the first lever 20 is returned, the first spring 27 disengages the fixed tooth 28, and the rack 4 is then subjected to the control of the mobile teeth.

Dans la deuxieme forme d'execution represent & ä la fig. 4, qui est une variante de la Premiere forme d'execution, 1e Profil de chacune des dents mobiles 6, 7 et 8 comprend seulement un Bord rectiligne de guidage 16 et un epaulement 18, de Sorte que les dents mobiles ne peuvent pas se remettre automa- tiquement en Prise avee la eremaillere 4 lorsqu'elles s'arretent contre 1'extremite 19 du levier 20 ayant tourne. In the second embodiment represented & in FIG. 4, which is a variant of the first embodiment, the first profile of each of the movable teeth 6, 7 and 8 comprises only a straight guide edge 16 and a shoulder 18, so that the movable teeth cannot recover automatically into engagement with the interlock 4 when they come to rest against the end 19 of the lever 20 having rotated.

Cette seconde forme d'execution comprend en outre trois leviers adjacents 45, 46 et 47 mont6s sur 1e pivot 23 de la plaque 22 et 61oign@s 1'un de Fautre dun pas elementaire. Sous 1'action d'un ressort 48 chacun des leviers 45, 46 et 47 s'appuie normale- ment sur une ailette 49 d'un pont 50 pivotant en 21 et appuye par Faction d'un ressort 51 sur 1e bras horizontal des leviers 20. This second embodiment further comprises three adjacent levers 45, 46 and 47 mounted on the first pivot 23 of the plate 22 and 61oign@s 1'un de Fautre dun elementary pitch. Under the action of a spring 48 each of the levers 45, 46 and 47 is normally supported on a fin 49 of a bridge 50 pivoting at 21 and supported by the action of a spring 51 on the horizontal arm of the levers. 20.

Lorsqu'un des leviers 20 pivote dans 1e sens con- traire des aiguilles dune montre, les dents mobiles 6, 7 et 8 se degagent de la cremaillere 4 tandis que 1e pont 50 tourne dans 1e sens contraire des aiguilles dune montre, en degageant les leviers 45, 46 et 47 qui peuvent alors engager la cr6maillere 4. CeHe-ci peut, dans ces conditions, avancer jusqu'au moment oü elle est arret6e par 1'un des leviers 45, 46 et 47. When one of the levers 20 pivots counter-clockwise, the mobile teeth 6, 7 and 8 disengage from the rack 4 while the bridge 50 rotates counter-clockwise, disengaging the levers 45, 46 and 47 which can then engage the rack 4. This can, under these conditions, move forward until it is stopped by one of the levers 45, 46 and 47.

Lorsque 1e levier 20 revient ä sa position initiale, ]es dents mobiles 6, 7 et 8 peuvent se remettre en prise avec la cr6maillere 4, tandis que 1e pont 50 sous Faction du ressort 51 degage les leviers 45, 46 et 47 de la cr6maillere 4, celle-ci peut effectuer un deuxieme mouvement, variable avec la course ac- complie precedemment par les dents mobiles, jus- qu'au moment oü elle est arretee par 1'arbre 10, par 1'interm6diaire dune desdites dents mobiles. When the lever 20 returns to its initial position, the mobile teeth 6, 7 and 8 can get back into engagement with the rack 4, while the bridge 50 under the action of the spring 51 disengages the levers 45, 46 and 47 from the rack. 4, the latter can perform a second movement, variable with the stroke previously accomplished by the movable teeth, until the moment when it is stopped by the shaft 10, by means of one of the said movable teeth.

Afin de pouvoir faire varier d'un ou de plusienrs pas Fespacement du chariot ä chaque frappe, la plaque 22 des deux formes d'execution sur laquelle sont montes les pivots 21, 23 et 31, est elle-meme axee sur deux pivots fixes 40 (fig 1) et maintenue par un ressort 41 appuyee contre un appendice 42 dune coulisse 43 coulissant sur un axe fixe 44. In order to be able to vary the spacing of the carriage by one or more steps with each strike, the plate 22 of the two embodiments on which the pivots 21, 23 and 31 are mounted, is itself centered on two fixed pivots 40 (fig 1) and held by a spring 41 supported against an appendage 42 of a slide 43 sliding on a fixed axis 44.

En depla@ant d'un intervalle determine la cou- lisse 43 vers la droite, la plaque 22 tourne autour des pivots 40 sous Faction du ressort 42, en 61oignant ainsi les extr6mit6s 19 des leviers 20 des epaulements 18 des dents 6, 7 et 8 d'un pas e16mentaire. Les extremites 19 arreteront ainsi les dents 6, 7 et 8 apres un nombre de pas 616mentaires superieur dune unite au nombre de pas normalement accomplis. By moving slider 43 to the right by a determined interval, plate 22 rotates around pivots 40 under the action of spring 42, thus locating the ends 19 of the levers 20 from the shoulders 18 of the teeth 6, 7 and 8 with an elementary step. The ends 19 will thus stop the teeth 6, 7 and 8 after a number of elementary steps one unit greater than the number of steps normally taken.

11 faut remarquer que Faxe 31 et 1e bras inf6- rieur des leviers 30 se trouvent sur Faxe de rotation de la plaque 22 de sorte que la commande des leviers 20 par les Barres universelles 34 West pas influenc6 par la rotation de la plaque 22. It should be noted that the axis 31 and the lower arm of the levers 30 are located on the axis of rotation of the plate 22 so that the control of the levers 20 by the universal bars 34 is not influenced by the rotation of the plate 22.

Claims

CLAIM Variable spacing device for a krire machine comprising on the one hand an escapement member advancing under the action of a spring and normally in engagement with movable teeth, and, on the other hand, by means to release RTI ID="0003.0273" WI="5" HE="4" LX="727" LY="2384"> these teeth in order to allow them to perform a variable stroke backward relative to the direction of advancement of the escapement member, characterized by a set of selectively actuable 61emuts, which in a single stroke disengage said movable teeth and are placed so as to fix the variable stroke of these teeth. SUB-CLAIMS 1. Device according to claim, characterized in that it further comprises at least one tooth normally disengaged from the exhaust member and arranged so as to. be able to engage with the exhaust member under the action of a uni versal bar controlled by said elements.

2. Device according to claim, characterized in that each of said 616ments is formed by a lever rotating under the action of a universal bar.

3. Device according to claim, characterized in that said movable teeth comprise a sliding edge and a shoulder, the first sliding edge coop6rant with F61ement s616ction actuates to disengage the teeth and 1'6paulement to fix said variable race back.

4. Device according to claim and sub-claims 2 and 3, characterized in that said levers are adjacent and 6quidistant, each lever being provided with an arm whose 1'extremitd cooperates with said sliding edge and with said shoulder, the first all in such a way that the variable travel of the teeth corresponds to an interval between the levers or to a multiple of this interval.

5. Device according to claim, in which the escapement member is a rack whose first pitch is a multiple of the elementary pitch of the spacing of the printed letters, characterized in that the mobile teeth are 61oignees one from the other of said 616mentary pitch and can move simultaneously parallel to the rack, each movable tooth having a sliding edge and a shoulder.

6. Device according to claim and sub-claim 5, characterized in that a notch is provided between the first sliding edge and the shoulder to allow the mobile teeth to get back into engagement with the rack when the shoulder abuts against the selection element actuated.

7. Device according to claim and the sub-claims 1 and 5, characterized by several normally disengaged teeth which are brought into this position by the universal bar during its return stroke. B.

Device according to claim and sub-claims 1, 5 and 7, characterized in that the said normally disengaged teeth are separated from each other by a 61st spacing step and controlled simultaneously by the universal bar controlled by the said Elements.

9.RTI ID="0003.0541" WI="15" HE="4" LX="1205" LY="2255"> Device according to claim and sub-claims 1, 5, 7 and 8, earacteris6 in that normally disengaged teeth are formed by adjacent levers rotating simultaneously.

10. Device according to claim, characterized by a common support on which the selection elements are mounted.