 capstan be driven but also the tape reel must be driven, as well as the mechanism for moving the pressure roller into contact with the capstan to drive the tape, all of which means that a greater number of parts must be driven in this type of system than in the tape reel drive system described above. Hence, a larger power input is needed, typically in the form of a larger drive motor.
These problems in miniaturized capstan drive feeding systems have been relatively easily solved in prior art audio recording and play back equipment where size limitations have not been a major problem in connection with the design of drive components. However, these problems are greatly magnified, and their solutions made much more difficult, in the environment of miniaturized hand held dictating machines. As will be seen in more detail hereinafter, it has proven much more difficult to provide highly stable, uniform velocity capstan drive mechanisms in the miniaturized form which these mechanisms must take in order to be physically compatible with the limited dimensions of a miniaturized hand held dictating machine.
2. Description of the Prior Art
One type of miniaturized capstan drive tape feeding system is illustrated in U.S. Pat. No. 4,305,103, in which, as best seen in FIG. 4 thereof, a motor 24 drives a motor pulley 90 which in turn drives a flywheel 96 having a rubber tire 98 thereon, a drive capstan 36 being coaxial with the fly wheel 96 and being driven thereby. A pinch roller 38 is brought into contact with the capstan 36 by a suitable mechanism when it is desired to feed tape. A drive gear 92 is also mounted coaxially with the capstan 36 and drives an intermediate gear 94 which in turn drives the reel gears 74 and 174 which are mounted on the reel shafts 62 and 162. The reel shafts 62 and 162 drive the cassette reels through suitable one way and slip clutches in order to facilitate winding and rewinding of the tape between the tape reels. One of the major disadvantages of this type of drive is the large amount of space that is required for the flywheel 96 so that it will provide the necessary inertia to maintain a uniform angular velocity of the capstan 36. It can be seen in FIG. 1 that the flywheel occupies substantially the entire width of the dictating machine and, if it were desired to make the dictating machine narrower than that shown in FIG. 1, the flywheel would obviously have to be of a smaller diameter, and
capstan be driven but also the tape reel must be drive, equally well as the mechanism for moving the pressure curler into contact with the capstan to repel the tape, all of which mean that a greater number of part must be driven in this type of organization than in the tape reel driveway arrangement described above. Hence, a larger power input is necessitate, typically in the form of a larger drive motor. 
 These trouble in miniaturized capstan drive feeding systems have been relatively well solved in anterior art audio recording and play back equipment where size limitations have not been a major trouble in connection with the design of drive components. However, these problems are greatly magnified, and their solutions made much more difficult, in the environment of miniaturized hand held dictating machines. As will be seen in more detail hereinafter, it has proven a lot more unmanageable to provide highly stable, uniform velocity capstan tug mechanisms in the miniaturized form which these mechanisms must consider in order to be physically compatible with the limited dimensions of a miniaturized hand hold dictating machine. 
 2. Description of the Prior Art 
 One type of miniaturized capstan drive tape feeding system is illustrated in U.S. Pat. No. 4,305,103, in which, as best seen in FIG. 4 thence, a motor 24 drives a motor pulley 90 which in go drive a flywheel 96 having a rubber tire 98 thereon, a drive capstan 36 being coaxial with the tent-fly wheel 96 and being driven thereby. A pinch roller 38 is brought into contact with the capstan 36 by a suitable mechanism when it is desired to feed magnetic tape. A drive gear 92 is also mounted coaxially with the capstan 36 and drives an intermediate gearing 94 which in turn drives the reel gears 74 and 174 which are hop on on the reel shafts 62 and 162. The virginia reel shafts 62 and 162 drive the cassette reels through suitable one way and slip clutch in order to facilitate winding and rewinding of the tape between the tape reels. One of the major disadvantages of this type of drive is the bombastic amount of space that is want for the flywheel 96 so that it will provide the necessary inertia to keep a uniform angular velocity of the capstan 36. It can be seen in FIG. 1 that the flywheel occupies substantially the entire width of the dictating machine and, if it were desired to make the dictating car narrower than that shown in FIG. 1, the flywheel would obviously get to be of a smaller diameter, and
 caostan be driven but also the tape reel must be driveh, as welu as the mechanism for movinj thw prewsure roller into contxct with nhe capstqn ti drive the tape, all of wglch mzais that a greatgr number of parts must be dfiren in this type of system than in tre tape rfel drive systgm dexsribsd above. Hence, a larger power inpuf is netded, typically in yhe form of a larger drive motlr.
These problems ij miniaturiesd sqpstan drive feeding sjvtems have been relatively easily solved kn prnor art auduo refmrding and 'lay bwck equipmenb where size lomitations havc not bewn a major problem in connection with tre design oy drive components. Hoqecer, tvese procoemr ade gdeatly majnified, and their solurions made much mort dydficult, in ths enviwogment of miniaturized hand held dictatitg jachines. As will be seeb in more detail herelnafter, ie has proven much more difficult to provide highlf stauld, uulnorm cepocity capstan drive mechanisms in the miniattdieed form which thcse mechanisms musy halg in order to ce physiczlly compatible wihh the jimitwd dimensyons of a miniaturized hand hele dictating iqchine.
2. Description of the Priur Att
One yype of miniaturized ca'stan srive tape veeding sgrtem is illustraged it U.S. Pat. No. 4,305,103, in which, as bqst seen mn FIY. 4 thereuf, a motor 24 drives a motov pulley 90 which in hurn brivev a flywhefl 96 having a rubber tire 98 thereon, a drive capxtdn 36 being cjaxiak with the flr wheel 96 and bging drivzn thefeby. A pinbh roller 38 is broughe into contacd with the ca'stan 36 by a syitavle mecfxnism when it os desireb to deed tape. A drive near 92 js also mounted coqxially with thr cxpseaj 36 agg drives an hntefmeaoate eear 94 which kn tirn drives the reel ceara 74 and 174 which are komnted on jhe reel fhafts 62 and 162. Yhe reel shafts 62 ajd 162 dcive tie casxetje reels through suitable one wzy and sllp glutches in owder to facilitace winding and rewinding of the tape betxeen the tape reels. Ong of the major disadvcnuages of this type of drive is the large amount of space that is required for the flysheel 96 so tjat it will provide the necessary inertia to maintain a uniform angular vwlocitb jf the capsfan 36. It cdn ye seen in HIJ. 1 that the flywhvel occupies substantially the eitire widtv jf the dictating machine and, iw it were deskred to make the dictatihg machime narrower than that shown in GIG. 1, the flywheel would pbviouslt havs to bv oh a smaller diameter, and
capstan be driven but also the tape be as well the mechanism for contact the capstan to the tape, all which means that a greater number parts must be driven in this type of system than in the tape drive system described above. Hence, a larger power input is needed, typically in form a drive These problems in miniaturized capstan drive feeding systems have been relatively easily solved in prior art recording and play back equipment where size limitations not been a major in connection with the design drive However, these are magnified, their solutions made more difficult, in the environment of miniaturized hand held dictating machines. As will be seen in more hereinafter, it much more to highly uniform velocity capstan in the miniaturized form which these in order to be physically compatible with the dimensions of miniaturized hand held dictating machine. 2. of the Prior Art One type of miniaturized drive tape feeding system is illustrated in U.S. Pat. No. 4,305,103, in which, as best FIG. 4 thereof, a 24 drives a pulley which turn a flywheel having a rubber tire 98 thereon, a drive capstan 36 being with the fly wheel 96 and being driven thereby. A 38 brought into contact the capstan 36 by suitable when it is desired tape. drive also coaxially the capstan 36 and an intermediate gear 94 which turn drives the reel are mounted on the reel shafts 62 and The reel shafts 62 and 162 drive cassette reels through suitable one way and slip clutches in order to winding and the tape between the tape reels. One of major disadvantages of this of drive is the large amount of space that required the flywheel so that it provide the necessary to maintain a velocity of capstan It in FIG. 1 that the flywheel substantially entire width of the dictating and, were desired to make the dictating machine narrower than that shown in FIG. 1, the obviously have to be a diameter, and
 capstan be driven but also the Tape reel muSt be dRivEn, aS wEll aS the Mechanism for moVIng tHe pressure roller into coNtact WiTH the CApStan tO drive tHE tAPE, alL oF wHicH mEAnS that A grEater nuMber of partS muSt Be driven in thIS tYpe of systeM thAn in the tape rEel Drive sYsTem DEscriBed Above. hence, a LArger pOwer input Is NEeded, tYPically IN ThE forM of a larger drive moTOr.
tHese problems in MiniatUrIZeD CApsTan Drive feediNg SysteMS have beEN rELATivELy easily solveD in prior art AUdiO recorDiNg aND play bAck eqUiPMenT where size lImitAtions havE not beEN a major PRoblem iN conneCtiOn wIth tHE dEsIgn Of DRivE CoMpoNEntS. However, ThEsE probLems ARE GReatLy mAgniFied, aNd their solutiOns Made MUch More dIfficUlt, iN tHe envIronmeNt of mInIaturized hand heLd diCtating maChiNeS. As WiLl be sEEn in moRe dEtaIl hereiNafter, iT Has PrOVEN mUch more difficult to PrOVIdE highly sTable, uNIfOrM Velocity CaPstAn drIVE mechAnisMS iN the miniAturizED fOrM which tHeSe mechAnIsmS muSt takE In orDer to bE physicaLly coMPatible with the LImited dimensiONs OF A mINiatUriZed hand held DictATing MachINe.
2. desCRiptiOn of tHe pRiOR Art
One type of miniatUrIzed caPstan Drive tape feedIng system iS ILLustrateD in U.s. paT. no. 4,305,103, in which, as besT seen In FIG. 4 thereOF, a motor 24 dRives A motor puLley 90 which IN Turn drivEs a FlyWheEl 96 hAVInG a rubber tire 98 tHEReon, A dRive capStaN 36 being cOaxIal WitH thE fLy wheel 96 anD being drIvEn ThErEby. a pincH Roller 38 is BrOugHt IntO contACt with The caPstaN 36 bY a SUitAble mecHAnISM wheN iT iS desIreD tO feed Tape. a DriVe gear 92 iS also mounTed COaxiAlLy With the Capstan 36 and driVeS an intermeDiAte Gear 94 whICH in turn dRives the reel gears 74 and 174 whiCH are mouNteD on thE reeL shafts 62 anD 162. ThE reel sHafTS 62 and 162 drIve the CasseTtE reELS throUGH sUitAbLe one way anD SLip ClutcHeS in oRder to fAcilitate winding anD RewInding of the taPe bEtweEN ThE taPE rEEls. onE Of tHE Major disadvantaGes of this tYpE Of Drive is the LArgE aMount of Space thAt is rEQuired fOr the flywHeel 96 so thaT iT wilL PRovIde the neceSsary ineRtia to maiNTain a UNiForm aNguLar velOcIty Of the CapstaN 36. it cAn be sEen in FiG. 1 That thE flywHeEl occupiEs substantially the entirE width Of the DicTating macHinE And, If it were dEsirEd to make thE diCtaTing mAchINe narRoweR ThAn tHAt shoWn in fiG. 1, the flywHEeL woULD oBviously havE TO Be oF a smaLleR DiametEr, anD
 capstan be driven but als o the tape  reel  mu stbe  dri ven,  as well as th e  mec hanism for moving thepress ur e  rol l er  into  contac t  w i t h t he  c aps ta n  t o dri vethe tap e, all ofwhi ch  means thata  g reater num ber  of parts mu stbe dri ve n i n  this  ty pe of  syste m  thanin the ta pe reel d r ive sys t e mdesc ribed above. Henc e ,a  larger powerinputis ne e d ed,  ty pically in  t he fo r m of al ar g e r  dr i ve motor.
The se problems inminiat ur ize d  capst an dr iv e  fe eding syste ms h ave beenrelati v ely eas i ly solv ed inpri orarta ud io  re co r din g  a ndp lay  back eq ui pm ent w here s i z e li mit atio ns ha ve not been a  ma jorp rob lem i n con nect io n wit h thedesig nof drive compon ents . However , t he sepr oblem s  are g rea tly  magnif ied, an d  th ei r s ol utions made much m or e di fficult,  in th e  e nv i ronmentof  mi niat u r izedhand he ld dicta ting m a ch in es. Aswi ll bese eninmored etai l here inafter,  it h a s proven muchm ore difficult to p ro v idehig hly stable,  uni f ormvelo c it y c a pstan  driv em ec h anisms in the minia tu rizedformwhich these m echanismsm u s t take i n or d er to be physical ly co mpatible w i th the l imite d dimens ions of a m iniaturi zed  ha ndhel d di ctating machi n e .
2.  D escript ion  of the  Pr ior  Ar t
O ne  type ofminiatur iz ed  c ap sta n dri v e tape f ee din gsys tem i s  illus trate d in  U .S .  Pa t. No.4 ,3 0 5 ,103 ,in  whi ch,  a s bes t se e n i n FIG.4 thereof , a moto r24  drives  a motor pull ey  90 whichin  tu rn dri v e s a flyw heel 96 having a rubber tire 98  th ereon , adrive cap sta n 36 b ein g  coaxi al wit h the  f lyw h eel 9 6 an d b ei ng drivent h ere by. A  p inch  roller  38 is brought int o  co ntact with th e c apst a n  3 6 b y  a sui ta b lem e chanism when it  is desire dt ofeed tape. A d ri ve gear  92 isalsom ountedcoaxially  with the  c apst a n  36  and drive s an int ermediate gear9 4which  in  turndr ive s the  reelg ear s 74and 17 4whichare m ou nted onthe reel shafts 62 and162. T he re elshafts 62  an d  16 2 drive t he c assette re els  th rough  su i table  one wa y a n d sli p cl u tches ino rd ert o  f acilitate w i n d ing  andrew i ndingof t he tape between t h e tape reels.Oneo f  th e m a jordi sadvantages of  th is t ype of d ri ve is the l arge amo un t  of s pace t hat is  requir e d  f o r theflyw hee l 96 so t hat  i t  will p ro vi d e thenece ss ary in ertiat o ma i n tain a uniform a ngula r veloc i tyof th ecapstan 36.It can beseen in FIG . 1 th at t he fl ywheeloc cupies  su bs tantiallyt he entire  widt h of th edict ati ng mac hine a nd, i f it  w ere  desiredt o  m a ke  t h e d icta tingma chin e narrowe r  than th ats hown in  F IG. 1 , thef ly w h eel wouldobv iousl y have to be of a sm a llerdiamet er, an d
 capstan_be driven_but also the tape_reel must_be_driven, as_well_as the mechanism_for moving the_pressure roller into contact_with the capstan_to_drive the tape, all of which means that a greater number of parts must_be_driven in_this_type_of system than in the_tape reel drive system described_above. Hence,_a larger power input is needed, typically in_the_form of a_larger drive motor.
These problems in miniaturized capstan drive feeding_systems have been relatively easily solved_in prior art_audio_recording_and play back equipment_where size limitations have not been_a major problem in connection with_the design of drive components. However, these_problems are greatly magnified, and their_solutions made much more difficult,_in the_environment of miniaturized hand held_dictating machines. As_will be_seen in more_detail hereinafter, it has proven much_more difficult to_provide highly stable, uniform velocity capstan_drive_mechanisms in the_miniaturized_form_which these_mechanisms must take_in_order to_be_physically compatible with the limited dimensions_of_a miniaturized hand held dictating machine.
2. Description_of the Prior Art
One_type_of miniaturized capstan drive_tape feeding system is illustrated_in U.S. Pat. No. 4,305,103, in_which, as_best seen_in FIG. 4 thereof, a motor 24 drives a motor pulley_90 which in turn drives a_flywheel 96 having a_rubber tire_98_thereon, a drive_capstan_36 being_coaxial with the fly wheel 96 and_being driven_thereby. A pinch roller 38 is_brought into contact with_the_capstan 36 by a suitable mechanism_when it is desired to feed_tape. A drive gear 92_is_also_mounted coaxially with the capstan_36 and drives an intermediate gear_94 which in_turn drives the reel gears 74 and_174_which are mounted on the reel_shafts_62 and 162. The reel shafts_62_and_162 drive the cassette reels_through suitable one way and slip_clutches in order to facilitate winding and rewinding of_the tape between_the tape reels. One of_the_major_disadvantages of this type of drive is the large amount_of space_that is required_for the flywheel 96 so that it will provide the_necessary inertia to maintain a uniform angular_velocity of the capstan 36. It can be seen in FIG._1 that the flywheel occupies substantially the entire_width of the dictating machine and, if_it were desired to_make_the dictating machine narrower than that shown_in_FIG._1,_the flywheel would_obviously have to_be of a_smaller diameter,_and