HK72896A - Head drum for a recorder - Google Patents

Head drum for a recorder

Info

Publication number
HK72896A
HK72896A HK72896A HK72896A HK72896A HK 72896 A HK72896 A HK 72896A HK 72896 A HK72896 A HK 72896A HK 72896 A HK72896 A HK 72896A HK 72896 A HK72896 A HK 72896A
Authority
HK
Hong Kong
Prior art keywords
head drum
part contains
head
recorder
markings
Prior art date
Application number
HK72896A
Inventor
Dietmar Uhde
Ruediger Lehmann
Guenther Gleim
Peter Hoch
Hartmut Schandl
Original Assignee
Thomson Brandt 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 Thomson Brandt Gmbh filed Critical Thomson Brandt Gmbh
Publication of HK72896A publication Critical patent/HK72896A/en

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K29/00—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices
    • H02K29/06—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with position sensing devices
    • H02K29/10—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with position sensing devices using light effect devices
    • 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
    • G11B15/467—Controlling, regulating, or indicating speed in arrangements for recording or reproducing wherein both record carriers and heads are driven
    • G11B15/473—Controlling, regulating, or indicating speed in arrangements for recording or reproducing wherein both record carriers and heads are driven by controlling the speed of the heads
    • 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
    • G11B15/12—Masking of heads; circuits for Selecting or switching of heads between operative and inoperative functions or between different operative functions or for selection between operative heads; Masking of beams, e.g. of light beams
    • G11B15/14—Masking or switching periodically, e.g. of rotating heads
    • 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
    • G11B15/467—Controlling, regulating, or indicating speed in arrangements for recording or reproducing wherein both record carriers and heads are driven
    • G11B15/473—Controlling, regulating, or indicating speed in arrangements for recording or reproducing wherein both record carriers and heads are driven by controlling the speed of the heads
    • G11B15/4731—Controlling, regulating, or indicating speed in arrangements for recording or reproducing wherein both record carriers and heads are driven by controlling the speed of the heads control of headwheel rotation

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Facsimile Scanning Arrangements (AREA)
  • Adjustment Of The Magnetic Head Position Track Following On Tapes (AREA)
  • Optical Transform (AREA)
  • Luminescent Compositions (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Optical Recording Or Reproduction (AREA)

Abstract

2.1. In a known head drum, the rotating drum part contains optically readable markings for generating pulses for an electronic commutation, servocontrol or head switching. It is the object to simplify the production of such markings and to reduce the influence of dust on the transparent plexiglass parts, the so-called noisy effect. 2.2. The rotating drum part contains a ring (5) with alternating opaque webs (8, 9) and interposed window-shaped openings (11). 2.3. Particularly a head drum for a VHS or S-VHS video recorder. <IMAGE>
HK72896A 1991-06-06 1996-04-25 Head drum for a recorder HK72896A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE4118535A DE4118535A1 (en) 1991-06-06 1991-06-06 HEAD DRUM FOR A RECORDER

Publications (1)

Publication Number Publication Date
HK72896A true HK72896A (en) 1996-05-03

Family

ID=6433280

Family Applications (1)

Application Number Title Priority Date Filing Date
HK72896A HK72896A (en) 1991-06-06 1996-04-25 Head drum for a recorder

Country Status (12)

Country Link
EP (2) EP0517105A1 (en)
JP (1) JP3266253B2 (en)
KR (1) KR100237236B1 (en)
AT (1) ATE125382T1 (en)
DE (2) DE4118535A1 (en)
ES (1) ES2077420T3 (en)
HK (1) HK72896A (en)
HU (1) HU212961B (en)
MX (1) MX9202650A (en)
MY (1) MY108778A (en)
TR (1) TR26248A (en)
WO (1) WO1992022059A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2109135B1 (en) * 1994-04-21 1998-07-01 Zertan Sa IMPROVEMENTS IN ELECTRIC MOTORS FOR WASHING MACHINES, DISHWASHERS AND THE LIKE.
JPH1130624A (en) 1997-07-11 1999-02-02 Alps Electric Co Ltd Tape running sensor and control circuit using the same as wall as control method for tape running sensor usign this control circuit
DE10337939A1 (en) * 2003-08-18 2005-03-24 Vorwerk & Co. Interholding Gmbh reluctance motor

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3569804A (en) * 1968-08-20 1971-03-09 Nasa Direct current motor with stationary armature and field
GB1546386A (en) * 1975-04-02 1979-05-23 Strathearn Audio Ltd Dc Reluctance elctric motors
DE3403150C1 (en) * 1984-01-31 1985-07-04 Deutsche Thomson-Brandt Gmbh, 7730 Villingen-Schwenningen Arrangement for generating control pulses for operating a video recording and playback device
SU1267478A1 (en) * 1985-03-25 1986-10-30 Специальное Конструкторско-Технологическое Бюро Производственного Объединения "Электронмаш" Device for controlling rotational speed of electric motor
DE3604238A1 (en) * 1986-02-11 1987-08-13 Thomson Brandt Gmbh ARRANGEMENT AND CIRCUIT FOR THE ELECTRICAL COMMUTATION OF EXCITATION COILS
DE3801029A1 (en) * 1988-01-15 1989-07-27 Thomson Brandt Gmbh METHOD AND DEVICE FOR CONTROLLING THE SPEED OF A ROTOR

Also Published As

Publication number Publication date
MX9202650A (en) 1993-01-01
HUT67515A (en) 1995-04-28
HU9303327D0 (en) 1994-03-28
MY108778A (en) 1996-11-30
ES2077420T3 (en) 1995-11-16
WO1992022059A1 (en) 1992-12-10
EP0587643A1 (en) 1994-03-23
JPH06507993A (en) 1994-09-08
JP3266253B2 (en) 2002-03-18
TR26248A (en) 1995-02-15
EP0587643B1 (en) 1995-07-19
ATE125382T1 (en) 1995-08-15
DE4118535A1 (en) 1992-12-10
KR100237236B1 (en) 2000-01-15
HU212961B (en) 1996-12-30
DE59202974D1 (en) 1995-08-24
EP0517105A1 (en) 1992-12-09
KR940701576A (en) 1994-05-28

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Legal Events

Date Code Title Description
PF Patent in force
PC Patent ceased (i.e. patent has lapsed due to the failure to pay the renewal fee)

Effective date: 20100529