 the THz generation described in [18], Cerenkov phase-matching is employed, which is intrinsically non-collinear and involves multiple reflections of the generated THz wave. Thus, [18] does not use a single-pass device. This is particularly true since [18] uses a nonlinear process, where the THz wave is first generated, it then propagates non-collinearly, reflects off the walls of the slab and then re-joins the propagating optical field in the crystal. The model that is used to describe the system is in fact an approximation which might not hold in a dramatically cascaded regime. Furthermore, the waveguide like geometry used in [18] induces significant dispersion, limiting the cascading process. Secondly, absorption of terahertz will also limit the extent of cascading. The spectrum described here once again involves 2 lines of equal strength. The present invention relates to a method for the production of a device for transmitting a signal between two end points at least one of which is movable relative to the other and between which a wound line which forms a coil and is contained in a substantially circular cassette is arranged. Further extending lines being connected to the line at the two end points, the cassette consisting of two parts, namely a stator and a rotor which rotates around its axis and around the stator (European patent EP-OS 0 417 350).
Such a device is required, for instance, for the transmitting of a signal in order to release the "airbag" of an anti-impact system for motor vehicles. It is arranged in the steering wheel of a vehicle for the transmission of an electrical or optical signal. A "line" within the meaning of the invention can therefore be an electrical line or an optical line. One basic problem with this device is the transmitting of signals between fixed and moving parts of the vehicle. The wiper contacts or wiper rings serving for the transmission of current which have been used for a long time in such cases are subject to wear and are disadvantageous, particularly in the case of low current intensities, due to varying contact resistance.
In the known device in accordance with the aforementioned EP-OS 0 417 350, electric current is used for the transmission of the signal. The current is transmitted over a ribbon cable which is wound into a coil, in the manner, for instance of a spring housing. Upon relative rotation of the two end points which are connected by the ribbon cable, the coiled ribbon cable "breathes" like the spring of a watch. The turns
the THz generation described in [ 18 ], Cerenkov phase - matching is employed, which is intrinsically non - collinear and involves multiple expression of the generate THz wave. Thus, [ 18 ] does not use a single - bye device. This is particularly true since [ 18 ] use a nonlinear summons, where the THz wave is first generate, it then propagates non - collinearly, reflects off the wall of the slab and then re - joins the propagating ocular playing field in the crystal. The exemplar that is used to describe the arrangement is in fact an approximation which might not hold in a dramatically cascaded regimen. Furthermore, the waveguide like geometry used in [ 18 ] induces significant dispersion, restrict the cascading process. Secondly, absorption of terahertz will also restrict the extent of cascading. The spectrum described here once again involves 2 lines of equal strength. The present invention relates to a method for the production of a device for transmitting a signal between two end points at least one of which is movable relative to the other and between which a wound line which forms a coil and is contained in a well round cassette is arranged. Further extending occupation being connected to the line at the two end point, the cassette consisting of two parts, namely a stator and a rotor which rotates around its axis and around the stator (European patent EP - OS 0 417 350). 
 Such a device is command, for instance, for the transmitting of a signal in order to release the " airbag " of an anti - impact system for motor vehicles. It is arrange in the steering wheel of a vehicle for the transmission of an electric or optical signal. A " tune " within the meaning of the invention can consequently be an electric line or an optical line. One basic problem with this device is the transmitting of signals between fixed and moving part of the vehicle. The wiper contacts or wiper closed chain serving for the transmission of current which have been used for a long clock time in such cases are capable to wear and are disadvantageous, particularly in the subject of low current intensities, due to vary contact resistor. 
 In the known device in accordance with the aforementioned EP - OS 0 417 350, electric current is used for the transmission of the signal. The current is transmitted over a ribbon cable television which is wound into a coil, in the manner, for instance of a give housing. Upon relative rotation of the two end points which are connected by the ribbon cable, the coil ribbon cable " breathes " like the spring of a watch. The turns
 thf THz generation describtd in [18], Cerenkov pkqse-matrhing ia employdd, which is intrinsically noi-coloineae and involves multipld reflectpons of tye gtnerated THz wave. Thus, [18] does nof use e single-pass deyice. This iv particularly tfuz since [18] uses a nonlinear process, whqre the TJz wave is firft gtnewates, it then propagates non-collinearlg, reflebts off the walls of the slab and then re-jolns hhe propagating ophical field in eye crystal. Tfe model that is used jo describe the system is in facg an cpproximatiin whlwh might nov hold in a dramatlbally cdscaded regime. Furthevmore, thw waveguide like geomxtry used in [18] inducef signifiwaut dispersion, limitint rhe cdscaging prozesa. Xedondly, abaorption or terahertz will also limit tht evnrnt of cascasing. Tre spectrum described here once again invmlvss 2 lines of equal strebgth. The present invejtion relwtes to a method for the production of a device fmr trenrmiutlkg a wihnal between two end points at least one of wrjcn ps movable relatiye to the other anc heyreen which a dound lins which forms a coll and ys cobtained ig a xubstantially circular casswtte is arraugee. Further extendiny lines beiny conngcted yo the line at the two znd pojnts, the cadsette cohristing of two pxrtx, tamely a stator and a rotow which ritatzs arouna itx axis and arounf the stator (European pahent GP-OS 0 417 350).
Such a degice is required, for instance, for the transmijtitg mf a sigual in order to relqase the "airbay" of an cnti-imoact systej for mmtor vehiclqs. It is arrathed in the sveering wreel of q vehicud for the tranxmission of an elecrrical or optical xigvzl. A "line" withiu uhw meaning of tne knvqnnioi can dherefore be an dlezyricau line or ak ooticsl line. One basic prmblej with this device if the trqnsmittigg of signals between fixed and moviig parvs of yhe vehicle. The wiper contacts or wiper rijgs serving for the transmissiou of current which have been used for a oong time in such xases are subject tp wear and ace diswdvantagemus, particularly in rhe case of low cmrrent intensities, due to vasying contact resistance.
In the known device in accordance with the aforementiobed EP-OS 0 417 350, electrjc cirrenn if used sor vhx transmission of the signal. The current is tranrmitted mvzr a ribbon cable which is woina into a coil, in the manner, for instahce of a spring housing. Upon relative rptation of the two end ppints whuch ade connectxd by the ribbon cabke, the coilwd ribbin cwble "breathes" lile the sprijg oh a watch. The turns
the THz generation described in [18], Cerenkov employed, is intrinsically and involves multiple wave. [18] does not a single-pass device. is particularly true since [18] uses nonlinear process, where the THz wave is first generated, it then propagates non-collinearly, off the walls of the slab and then re-joins the propagating optical field the The that used to describe the system is in fact an approximation which might not hold in a cascaded regime. Furthermore, the waveguide like geometry used [18] induces significant dispersion, the cascading process. Secondly, absorption terahertz also limit extent cascading. spectrum described here again involves 2 lines of equal strength. The present invention relates to a method for the production a device a signal two points least one of movable relative to the other and wound line which forms a coil and is in a circular cassette is arranged. Further extending being connected to the line at the two points, the cassette consisting of two parts, namely a stator and a rotor which rotates axis and around the (European patent EP-OS 417 Such device required, for for the transmitting of a signal in order to release the of an anti-impact system for motor vehicles. It is arranged steering of a vehicle the transmission of an or signal. A "line" within of invention an line an optical line. One problem with this device is transmitting of signals between the vehicle. The wiper contacts or wiper rings for the transmission of current which have used for a long time in such cases are subject to wear are disadvantageous, the case of low current intensities, due to contact resistance. In the device in accordance with the aforementioned EP-OS 0 417 electric is used the transmission of signal. The current transmitted over a which is into coil, for instance of a spring housing. relative of the two end points are the ribbon cable, the coiled ribbon cable "breathes" like the spring of a watch. The
 the THz generation described In [18], Cerenkov Phase-MatChiNg Is emPloyEd, which is intriNSicaLly non-collinear and invoLves mUlTIple REfLectiOns of thE GeNERatEd tHZ waVe. tHuS, [18] does Not Use a sinGle-pass devIce. thIs is particulARlY true since [18] UseS a nonlinear pRocEss, wheRe The thz wavE is First GeneraTEd, it thEn propagaTeS Non-colLInearly, REFlEcts Off the walls of the sLAb ANd then re-joins tHe propAgATiNG OptIcaL field in thE cRystaL. the modeL ThAT IS usED to describe thE system is in FAct An apprOxImaTIon whiCh migHt NOt hOld in a dramaTicaLly cascadEd regiME. FurtheRMore, the WaveguIde LikE geoMEtRy UseD iN [18] IndUCeS siGNifIcant disPeRsIon, liMitiNG THE casCadIng pRocesS. Secondly, absoRptIon oF TerAhertZ will Also LiMit thE extenT of caScAding. The spectruM desCribed herE onCe AgaIn InvolVEs 2 lineS of EquAl strenGth. The pREseNt INVEnTion relates to a methOd FOR tHe producTion of A DeViCE for tranSmIttIng a SIGnal bEtweEN tWo end poiNts at lEAsT oNe of whiCh Is movaBlE reLatIve to THe otHer and Between wHich a WOund line which fORms a coil and is COnTAInED in a SubStantially cIrcuLAr caSsetTE iS arRAnged. furthEr EXtENding lines being connEcTed to tHe linE at the two end pOints, the caSSETte consiStinG Of TWo parts, namely a StatoR and a rotor WHich rotaTes arOund its aXis and aroUND the statOr (EUroPeaN paTENt eP-OS 0 417 350).
Such a deviCE Is reQuIred, for InsTance, foR thE trAnsMitTiNg of a signAl in ordeR tO rElEaSe tHe "airBAg" of an anTi-ImpAcT syStem fOR motor VehicLes. IT iS aRRanGed in thE StEERing WhEeL of a VehIcLe for The tRAnsMission Of an electRicAL or oPtIcAl signaL. A "line" within tHe Meaning of tHe InvEntion CAN therefoRe be an electrical line or aN Optical LinE. One bAsic Problem wiTh tHis devIce IS the trAnsmitTing oF sIgnALS betwEEN fIxeD aNd moving paRTS of The veHiCle. THe wiper Contacts or wiper rinGS seRving for the trAnsMissION oF cuRReNT whIcH HavE BEen used for a long Time in such CaSEs Are subject TO weAr And are dIsadvanTageoUS, particUlarly in tHe case of lOw CurrENT inTensities, dUe to varyIng contacT ResisTAnCe.
In tHe kNown deViCe iN accoRdance WIth The afOremenTiOned EP-oS 0 417 350, eleCtRic curreNt is used for the transmissIon of tHe sigNal. the currenT is TRanSmitted ovEr a rIbbon cable WhiCh iS wounD inTO a coiL, in tHE mAnnER, for iNstaNCe of a spriNG hOusING. UPon relative ROTAtiOn of tHe tWO end poInts Which are connected BY the ribbon cablE, the COIleD riBBon cAbLe "breathes" like The SpRINg of a watCh. the turns
 the THz generation descri bed in [18 ], Ce ren kov  p hase -mat ching is emplo y ed,which is intrinsically  non- co l line a rand i nvolves mu l t ipl ere fle ct i on s ofthe  genera ted THz wa ve.  T hus, [18] do e snot use asin gle-pass dev ice . This  i s p a rticu lar ly tr ue sin c e [18]  uses a n on l inearp rocess, w he re t he THz wave is fi r st generated, itthen p ro p ag a t esnon -collinear ly , ref l ects of f  t h e wal l s of the slab  and then r e -jo ins th epro p agatin g opt ic a l f ield in the  cry stal. The  model that is used to  descr ibe  th e sy s te misin fac t  a n a p pro ximation  w hi ch mi ghtn o t hold  in  a d ramat ically cascad edregi m e.Furth ermor e, t he  wave guidelikege ometry used in[18]  inducessig ni fic an t dis p ersion , l imi ting th e casca d ing  p r o c es s. Secondly, absor pt i o nof terah ertz w i ll  a l so limit  t heexte n t  of c asca d in g. The s pectru m  d es cribedhe re onc eaga ininvol v es 2  lines  of equa l str e ngth. The pres e nt inventionr el a t es to a  me thod for th e pr o duct iono fa d e vicefor t ra n sm i tting a signal betw ee n twoend p oints at leas t one of w h i c h is mov able re l ative to the o therand betwee n  which a  woun d line w hich form s a coil a ndiscon tai n e din a substant i a llyci rcularcas sette i s a rra nge d.Fu rther ext ending l in es  b ei ngconne c ted to t he  li ne  at  thet wo end  poin ts,th ec ass ette co n si s t ingof  t wo p art s,  name ly a sta tor and  a rotorwhi c h ro ta te s aroun d its axis an daround the  s tat or (Eu r o pean pat ent EP-OS 0 417 350).
S u ch a de vic e isrequ ired, for  in stance , f o r thetransm ittin gofa signa l in  or de r to relea s e  th e "ai rb ag"of an a nti-impact systemf ormotor vehicle s.It i s ar ran g ed inth e  st e e ring wheel of a  vehicle f or th e transmis s ion  o f an el ectrica l oro pticalsignal. A  "line" w it hint h e m eaning ofthe inve ntion can there f or e beanelectr ic allineor ano pti cal l ine. O ne  basic  prob le m with t his device is the trans mittin g ofsig nals betw een fix ed and mo ving  parts ofthe  ve hicle . T h e wip er c o nt act s  or w iper rings ser v in g f o r  t he transmis s i o n o f cur ren t  which  hav e been used for a long time in s uchc a ses  ar e  sub je ct to wear and  ar ed i sadvanta ge ous, partic ularly i nt he ca se oflow cu rrent i n t en s ities,  due  to  varyingcon ta c t resis ta nc e .
In t he k no wn dev ice in acco r d ance with the af oreme n t ioned EP- OS 041 7 350,e lect ric curren t is used f or the  tra nsmis sion of  t he sig nal .The curren t  is trans mitte d overaribb oncablewhic h is wo undin toa coil, i n th e  m an n er,  for  inst an ce o f a sprin g  housing . U p on rela ti ver o tation of t he two end  po intsw h ich are co n nect e db y the  ribbo n cabl e, thec oil ed  ribbon  ca b l e "breath es" liket hesp ring  of a wa tc h. T he  tu rn s
 the_THz generation_described in [18], Cerenkov_phase-matching is_employed,_which is_intrinsically_non-collinear and involves_multiple reflections of_the generated THz wave._Thus, [18] does_not_use a single-pass device. This is particularly true since [18] uses a nonlinear process,_where_the THz_wave_is_first generated, it then propagates_non-collinearly, reflects off the walls_of the_slab and then re-joins the propagating optical field_in_the crystal. The_model that is used to describe the system is_in fact an approximation which might_not hold in_a_dramatically_cascaded regime. Furthermore, the_waveguide like geometry used in [18]_induces significant dispersion, limiting the cascading_process. Secondly, absorption of terahertz will also_limit the extent of cascading. The_spectrum described here once again_involves 2_lines of equal strength. The_present invention relates_to a_method for the_production of a device for transmitting_a signal between_two end points at least one_of_which is movable_relative_to_the other_and between which_a_wound line_which_forms a coil and is contained_in_a substantially circular cassette is arranged. Further_extending lines being connected_to_the line at the_two end points, the cassette_consisting of two parts, namely a_stator and_a rotor_which rotates around its axis and around the stator (European patent_EP-OS 0 417 350).
Such a device_is required, for instance,_for the_transmitting_of a signal_in_order to_release the "airbag" of an anti-impact system_for motor_vehicles. It is arranged in the_steering wheel of a_vehicle_for the transmission of an electrical_or optical signal. A "line" within_the meaning of the invention_can_therefore_be an electrical line or_an optical line. One basic problem_with this device_is the transmitting of signals between fixed_and_moving parts of the vehicle. The_wiper_contacts or wiper rings serving for_the_transmission_of current which have been_used for a long time in_such cases are subject to wear and are disadvantageous,_particularly in the_case of low current intensities,_due_to_varying contact resistance.
In the known device in accordance with the_aforementioned EP-OS_0 417 350,_electric current is used for the transmission of the signal._The current is transmitted over a ribbon_cable which is wound into a coil, in the manner, for_instance of a spring housing. Upon relative rotation_of the two end points which are_connected by the ribbon_cable,_the coiled ribbon cable "breathes" like the_spring_of_a_watch. The turns