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GB1022199A - Regulating system for the driving motor for the reels in magnetic tape devices - Google Patents

Regulating system for the driving motor for the reels in magnetic tape devices

Info

Publication number
GB1022199A
GB1022199A GB2104764A GB2104764A GB1022199A GB 1022199 A GB1022199 A GB 1022199A GB 2104764 A GB2104764 A GB 2104764A GB 2104764 A GB2104764 A GB 2104764A GB 1022199 A GB1022199 A GB 1022199A
Authority
GB
United Kingdom
Prior art keywords
generator
motor
pulses
transistor
terminal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB2104764A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Telefunken Patentverwertungs GmbH
Original Assignee
Telefunken Patentverwertungs GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Telefunken Patentverwertungs GmbH filed Critical Telefunken Patentverwertungs GmbH
Publication of GB1022199A publication Critical patent/GB1022199A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
    • G11B15/18—Driving; Starting; Stopping; Arrangements for control or regulation thereof
    • G11B15/46—Controlling, regulating, or indicating speed
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
    • G11B15/02—Control of operating function, e.g. switching from recording to reproducing
    • G11B15/16—Control of operating function, e.g. switching from recording to reproducing by sensing presence, absence or position of record carrier or container
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
    • G11B15/18—Driving; Starting; Stopping; Arrangements for control or regulation thereof
    • G11B15/43—Control or regulation of mechanical tension of record carrier, e.g. tape tension

Landscapes

  • Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)
  • Tension Adjustment In Filamentary Materials (AREA)

Abstract

1,022,199. Automatic tension control. TELEFUNKEN PATENTVERWERTUNGSGESELLSCHAFT m.b.H. May 21,1964 [May 24, 1963], No. 21047/64. Heading G3R. [Also in Division H2] A reel 4 for magnetic tape is driven by singlephase motor 5 whose speed is controlled by lever 9 associated with a loop of tape. A control voltage proportional to tape-tension is supplied from generator 11 to monostable multivibrator 12 pro-. ducing a train of rectangular pulses whose width is modulated in accordance with variations in the tension. The train of pulses is applied to a switching amplifier 14 which in interrupts the motor voltage at such a high frequency as to prevent fluctuations in the motor torque. In addition, the generator 11 controls a pulse generator 13 for varying the frequency of interruption of motor voltage as well as the duration thereof. The multivibrator 12 comprises transistor T1 which is blocked by a negative pulse applied at terminal k1 from the generator 13, whereby transistor T2 is rendered conductive and a negative potential is applied to one plate of capacitor Ct. The dwell time in the semistable state of the multivibrator 12 depends upon the discharge period of capacitor Ct and this is varied by the control voltage at terminal k2 which is derived from generator 11 and applied to transistor T3. The pulses at the collector T1 are supplied through terminal k3 to the amplifier 14. The motor is associated with a bridge rectifier having one terminal connected to earth directly, and another terminal connected to earth through a transistor whose base is supplied with pulses from the amplifier 14, Fig. 3 (not shown).
GB2104764A 1963-05-24 1964-05-21 Regulating system for the driving motor for the reels in magnetic tape devices Expired GB1022199A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DET0024043 1963-05-24

Publications (1)

Publication Number Publication Date
GB1022199A true GB1022199A (en) 1966-03-09

Family

ID=7551282

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2104764A Expired GB1022199A (en) 1963-05-24 1964-05-21 Regulating system for the driving motor for the reels in magnetic tape devices

Country Status (2)

Country Link
CH (1) CH423293A (en)
GB (1) GB1022199A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4196375A (en) * 1978-03-31 1980-04-01 Digital Equipment Corporation A.C. tape reel servo
DE3409299A1 (en) * 1984-03-14 1985-09-19 VEGLA Vereinigte Glaswerke GmbH, 5100 Aachen Pulse-width controller for single-phase or multi-phase AC machines
DE3439924A1 (en) * 1984-11-02 1986-05-07 Wilo-Werk Gmbh & Co, 4600 Dortmund Continuous speed controller for single-phase AC motors
DE3841147A1 (en) * 1988-12-07 1990-06-13 Mulfingen Elektrobau Ebm METHOD FOR DRIVING AN AC MOTOR, AND ACCORDINGLY DRIVABLE AC MOTOR BY THIS METHOD
WO1995006353A1 (en) * 1993-08-20 1995-03-02 Wöel Elektronik Hb Circuit for speed control for a one-phase or three-phase motor

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4196375A (en) * 1978-03-31 1980-04-01 Digital Equipment Corporation A.C. tape reel servo
DE3409299A1 (en) * 1984-03-14 1985-09-19 VEGLA Vereinigte Glaswerke GmbH, 5100 Aachen Pulse-width controller for single-phase or multi-phase AC machines
DE3439924A1 (en) * 1984-11-02 1986-05-07 Wilo-Werk Gmbh & Co, 4600 Dortmund Continuous speed controller for single-phase AC motors
DE3841147A1 (en) * 1988-12-07 1990-06-13 Mulfingen Elektrobau Ebm METHOD FOR DRIVING AN AC MOTOR, AND ACCORDINGLY DRIVABLE AC MOTOR BY THIS METHOD
US5021726A (en) * 1988-12-07 1991-06-04 Ebm Elektrobau Mulfingen Gmbh & Co. Process for driving an alternating-current motor and an alternating current motor which can be driven in accordance with this process
WO1995006353A1 (en) * 1993-08-20 1995-03-02 Wöel Elektronik Hb Circuit for speed control for a one-phase or three-phase motor
US5953490A (en) * 1993-08-20 1999-09-14 Woel Elektronik Hb Circuit for speed control for a one-phase or three-phase motor

Also Published As

Publication number Publication date
CH423293A (en) 1966-10-31

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