DE1929778U - DEVICE FOR AUTOMATIC SWITCHING OFF THE DRIVE OF TAPE-SHAPED RECORDING MEDIA. - Google Patents

Description

Pi. 1215 29 * 28.2 J2

Dipl.-lng. Dipl. Oec, publ. BB T? 16,

! TABLE LEWIMSiCY

PATENT ADVOCATE
Munich-Pasing, AgneD-Bernauer-Sirafje 202

Telephone 1 81 39 -BVifiMAimafa yn

Willi Studer

Device for the automatic shutdown of the ■ tape-shaped Aufaeiolanuagträger

The in practical operation for! Band-shaped® Aufsei © 3muagsträg © r ₉ inalsesoadere Soabaadgerätea 9 are mostly provided with a TorrielstTing © li © 2i ₉ that an automatic shutdown of the drive) ® when passing through the Basadesdei © the auoh "in case of malfunctions nasty Banölaufs "bewirls © n ₀ There are numerous © solutions of this ProWLema known," which almost all focus on influencing the position of an aelawenkbas? stored Pühlroll © - _s are based -after the end of the tape

their position and irerändert & © n Seiialtforgasg triggers ₆ also '' © optically or electrically wurdan © means ₉ used to DI®

occurs © in a beam of light © in © 2? h © t © a © ll © occurs; etc _t

transport® have the meager part _β that they either borrowed® mechanisoh © S © i3 ^ wi® H © b © l with Hollen Oeäglo do not need the given: Iotweaäigk © iten d®E>'equipment" conditional © ind ₉ or that si® on changing belt speed and other disturbances in the belt run not in lall one

Lever arrangement against the peeling direction on © inen 'dröstp UBIf ₀ Such disturbances can be caused by badly executed® tape-glued points ₉ where &&% ■

eat β dia

The inventive © Einrieatung sur automatic disconnection

a fom band co-co-oismen. loosely driven © means additional ¹ generation of a ©! © lctrisohen signal in lOrm of a voltage © der'a pulse train with the belt speed

Tom mentioned signal controlled ©;, frequency dependent © Mitt ©!

This® facility avoids the mentioned Iaehtelle ₅ iad @ m the shutdown of the totri © "bii®inriehtuag always see © & then © follows when the speed of the äureli da © band withgsaofflh menen Holle changes by a smaller amount © _s which ao © h di © Yorteil © ferbuaiaa © iad ₉ das® Merffe 5 © ^ ® ^^^ serving Holle Jierang © so-called © 2i werösa k © na and no © •. arranged, aueätsliehea- Hefetl u, s- _o w ». adtig eiado B © i device _D di © b © i Dmrohlauf des Baad @ aöes or "b®i nisehen disturbanceaa d © e belt run automatically responds, nt» ¹ during the rotation of the fom belt mitg @ n © am © n @ a Holle a © lelst ^ isGhe® Koatrollsignal generated, 'whose determination. data change in the event of mechanical disturbances of the belt run \ md when the belt end is running o Bb are * sahlreioh © * Wandi principles known _? the feil and "an eleteteieehen S © jialtel © js © nt

other suitable® ₉ changing its 'determination data' emit a signal ₉ that can be evaluated to replace a shutdown process _o Torriohtiiages that emit © in © impulse sequence or an alternating voltage · emit ₉ d © ren fr0q are particularly suitable .uens der DreasaM, which is proportional to the H © 11 © moved by the belt »As long as © the Holle norssal rotated wise the

through the © Bandgoschwiafiigfeeit usad di ©

on ρ and a deviation from this defiled frequency the Durohlauf of the Baadaafl © ® © d @ r auoh © ia @ other © regularlyfeelt in the belt aa, When the Bolls comes to a standstill, di © fr® ^ u © ag lull et al so that üiseÄaupt toira control signal m © te to ₀ Duroh frQ ^ uen ^ abSiaQsig © Retention elements can be in a simple way © aia! "bsohaltvorgajag

This triggering of the Afesolialttrorganges is "SoB ₀ under use of the uat © ^ © n GreaEfrequeng of a intensifier iuro rasüh® Atoahae of the output power" with lower]? Req.uensen without feesoadere susätslioli © means m

Various execution examples © des-Srfindung®g @ object are shown in the drawing

Mg »1 s © rate execution ³ Ia ₉ where the evaluation of the control signal is shown schematically,

fig ο 2 Teraiisohaulicht © in © arrangement for lioht © l @ & trisoh © a viewing of the control signal ₉

Figo 3 2 © igt a® ? Reitere Löglieh & eit sur Signalerseuguag using a® closed in itself

1 .b © i © inem 3! O2Ä © nc! Device eiae ia Weis® is provided with lateral ftiteuagsflaaiohga © »los® tape« = füJarungsroll © 1 as a result of © the Urasehlingusg © ia @ s Seil®® itaes circumference © by da® Sonband 2 carried along to ®ia®r rotary movement * The Aohse 3 d © r Holle 1 is 1® bearing 4. g © füiirt uaä carries on & ®r other »side for storage place eiae Eiarichtuag, from ®ia © m in Aciisriehtusg magnetMerfea Periaanentaiagiiet 5 _S 0 © ^ between swei
and 7 is set ₉ so that the interlocking Eälm®. 8 each have wecöselte® polarity »Sine aeiaematis © !!. aiii iron core 9 shown with winding 10 © ₉ f © st © liend © recording fore direction delivers during rotation of the SeheiTsea β uad 7 electrical voltage imptilsej whose Eroqueni du ^ ch the Bandg © - = speed or »« lie Bre & sahl and di © P © lg © & l of the toothed disks β and 7 is given «At a standstill, te @ is induced in the signal in the scallop 10 _e The with normal belt run.

in a transistor amplifier 11 and n & Gä passing © in © © filters 12 on actuation © ines relay 13 uses ₉ deasön Kentskt 14 with energized K © lais di® belt drive motors 15 to the © (not shown ©) supply current, source switches on. DI® fr © "is quensabhängigkeit the Filteranordnusig 12 in this case such that _s Signalfr @ q, u0ng © n below the selected ₈ äeffi a®E" IAAL © n

Disturbances of the belt run © the run o © a gang o © © and the resulting T®rbunden © n lowering of the Siga.alfr © <3.u © ns the relay 13 is de-energized ₉ and the belt drive - "is thereby under

But it is auöh m8gli © h _g without © in © "besoad® ^ ^ © filt rsaordnusii 12 get along si ind © st aaa flea Verstäsfes ¹ itself @@ di © SollfröQLueas of. Koatrollsigaals geraä © © 1 the lower feensfr © Q u @ns of the amplifier is «As a result of the decreasing output power of the amplifier b © i

> 9

a ligament tear etc. occurs *

Aues®? the shown direct! "provision of the would naturally also be esider © '. Possibilities for Ba- =

one? © lektromechanisehen coupling gwis © heia the motors and the drive rollers for the belt ₉ © the indirect triggering of the Abs © haltvorgange @ ₉ approximately in connection with the

Figure ₀ 2 shows © in example of an electro-optical device '25UR generating the IControllsignalSo on the axis © 5 sit st here a Loohaohaibe 20 having their hand in a regular Seilung Durohlireohungen 21 and sieh.zwischen a fixed Iiampe 22 and DEM opposite liehtempf indliehen Sehaltelement 23 (PM © ® © !! ©; »Photo resistanceg Pfe © t © = · transistor etc.») moves _β Bei. Rotation of the ¹ Seheib © 20 as a result of the drive taken by di © from the belt ©lös © Ftteungs «'roll © 1 causes the switching element 23 to generate an electrical® pulse«

Follow j whose frequency turn the tape speed is proportional "This signal is further processed in the manner described WEIS® sv / gon automatic interference d © s tape drive when sinking ImpuXsfrequens" It iet also möglieh, with a corresponding arrangement iron Lichtquell® and photosensitive element, the tape guide roll itself to be designed as a perforated disc _9, which means that a © separate © perforated disc 20 can be omitted and a® particularly simple arrangement results,

There is another possibility of generating the control signal, the Di® axis 3 shown in FIG , which consists of a: permanently magnetized material "The covering can be ζ , BO by 'a piece' of a standard M &gnettonbasiäes" that is glued to the circumference of the disc o The covering is in reg®! " moderate division with a sufficient number of poles magnetized and during the movement of the magnetic coating "31 - in the immediate vicinity of the air gap of the magnet head 32, which is indicated by the" mathematically indicated "head 32, an alternating voltage is induced in its winding 33, the frequency of which is the Belt speed is proportional and di © j as described above, because © signal to -automat! · »See shutdown of the drive mechanism when the frequency falls below the target frequency. This © embodiment shows the gate part © very simple division, to ₉ da sB Magnetic sound =

will be first band recorded with a suitable 3?onfreq.u@as _"9 the ansohliessend in'Abschnitten, of suitable long-© glued ο It is there-a £ aeh ₉ Mass © 'of the rotating · j = the ropes which remain below certain limits must _s s © hr small su hold because the ßewieht the magnetic coating practical ~ tiech vern & is ehlässigbar and as a support body (Seheib © 30) in ©

to " mention" that the speed of the shaft 1 carried along by the strip is at most relatively low at the lowest standardized strip speed, and therefore the number of magnetic poles to achieve a target frequency that can be easily processed must be reasonably high for this number of poles select the magnetization of the coating 31 on the disc .30 © hae further any suitable value "As a result see also the] £ on®trukti ¥ e · FORTEIL ₉ that the diameter of Seheib © 30 chosen correspondingly small werden.kann". This means that © is more in ©

This example © portray raeno some of the possible Ausführungsfor There are jedooh 'AUOH other solutions under ¥ @ rw @ mduag of optical _s elektrostatieohers, od © r ^ other electromagnetic transducer insbesondere'dort used ₉ where stray fields * soher executions ^ must be ermieden _o .

Claims (3)

Pipl.-Ing. Dipl.oec. publ, Π Λ £ f] QO Γ Q ■, -f D "Η C C- !! RICH LEWINSKY λ." A. Öü Z- <3 0 *! 0.1ί.ö!) PATENTANWALT Münehen-Pasing, Aegnes- Bernauet-Telefon 181.3 "? St H 397 / 43a / .V.::; V ..;? ^ /; Scliutzendungciiei: ν VV-.: - 1. Device for automatic shutdown of the electrical V drive for ^; tape-shaped recording media in the event of a fault, in particular in the case of tape recorders, characterized by ^{7 means arranged} on a loosely rotating tape deflection roller (1); V: (5-10, 20 «23, 3Ο-33) for generating an electrical signal that is dependent on normal tape travel and by electrical switching means (13, 14) controlled by this signal via amplification means (1ΐ) to switch off the drive (15 ) if this signal is lost or if there is a significant change in its determination data. 2 * device according to claim 1, characterized by a the roller axis (3) co-rotating, permanently magnetized at regular intervals on the circumference ^ disc (5), which with a stationary, with an induction winding (10) provided receiving head (9) cooperates (Fig. 1). 3. Device according to claims 1 and 2, characterized in that that the disc (30) carries a magnetic tape (31) on its periphery, which with a signal of constant frequency is recorded (Fig. 3) * 2 - ' ~ 2 4 «device according to claim 1, characterized by a the roller axis (3) co-rotating, on the circumference at regular intervals perforated disc (20), which is between a stationary light source (22) and an opposite, light-sensitive switching element (23) can be moved (Pig, 2) * 5β device according to one of the preceding claims, characterized characterized in that the nominal frequency of the signal is immediately above the lower limit frequency of the signal amplifier (11) located*