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FR2441901A1 - Video disc player - has track skipping device comprising coils and permanent magnet moving needle radially across disc - Google Patents

Video disc player - has track skipping device comprising coils and permanent magnet moving needle radially across disc

Info

Publication number
FR2441901A1
FR2441901A1 FR7928211A FR7928211A FR2441901A1 FR 2441901 A1 FR2441901 A1 FR 2441901A1 FR 7928211 A FR7928211 A FR 7928211A FR 7928211 A FR7928211 A FR 7928211A FR 2441901 A1 FR2441901 A1 FR 2441901A1
Authority
FR
France
Prior art keywords
permanent magnet
disc
coils
needle
magnet moving
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.)
Withdrawn
Application number
FR7928211A
Other languages
French (fr)
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.)
RCA Corp
Original Assignee
RCA Corp
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
Priority claimed from US06/039,358 external-priority patent/US4258233A/en
Application filed by RCA Corp filed Critical RCA Corp
Publication of FR2441901A1 publication Critical patent/FR2441901A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B3/00—Recording by mechanical cutting, deforming or pressing, e.g. of grooves or pits; Reproducing by mechanical sensing; Record carriers therefor
    • G11B3/02—Arrangements of heads
    • G11B3/10—Arranging, supporting, or driving of heads or of transducers relatively to record carriers
    • G11B3/12—Supporting in balanced, counterbalanced or loaded operative position during transducing, e.g. loading in direction of traverse
    • G11B3/125—Supporting in balanced, counterbalanced or loaded operative position during transducing, e.g. loading in direction of traverse by using electric or magnetic means
    • G11B3/127—Providing horizontal force, e.g. anti-skating force
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B21/00—Head arrangements not specific to the method of recording or reproducing
    • G11B21/02—Driving or moving of heads
    • G11B21/08—Track changing or selecting during transducing operation
    • G11B21/081—Access to indexed tracks or parts of continuous track
    • G11B21/083—Access to indexed tracks or parts of continuous track on discs
    • G11B21/085—Access to indexed tracks or parts of continuous track on discs with track following of accessed part

Landscapes

  • Moving Of Heads (AREA)

Abstract

L'INVENTION CONCERNE UN APPAREIL, DANS UN SYSTEME DE RESTITUTION D'UNE INFORMATION PRE-ENREGISTREE SUR UN DISQUE AYANT UNE PISTE D'INFORMATION EN SPIRALE, PAR UNE AIGUILLE, QUAND UNE VITESSE RELATIVE AIGUILLEDISQUE EST ETABLIE, OU UN FONCTIONNEMENT NORMAL DU SYSTEME CONSISTE A DETECTER L'INFORMATION PRE-ENREGISTREE LE LONG DE SPIRES SUCCESSIVES DE LA PISTE SELON UNE PROGRESSION REGULIERE VERS UNE EXTREMITE. SELON L'INVENTION, IL COMPREND UN CHARIOT 16, UN BRAS DE LECTURE 50 PORTANT L'AIGUILLE 54 A UNE EXTREMITE, UN MOYEN POUR FIXER ELASTIQUEMENT L'AUTRE EXTREMITE DU BRAS AU CHARIOT, UN AIMANT PERMANENT 100 FIXE AU BRAS DE LECTURE A PROXIMITE DE SA PREMIERE EXTREMITE, DEUX BOBINES ESPACEES 102, 104 AYANT DES NOYAUX NON MAGNETIQUES, ET UN MOYEN POUR LES MONTER SUR LE CHARIOT DE FACON QUE L'AIMANT PERMANENT SOIT DISPOSE ENTRE ELLES, AINSI QU'UN MOYEN POUR EXCITER SELECTIVEMENT LES BOBINES AFIN DE PROVOQUER UN DECALAGE DE L'EMPLACEMENT RADIAL DE L'AIGUILLE. L'INVENTION S'APPLIQUE NOTAMMENT AUX TELEVISEURS EN COULEURS.THE INVENTION CONCERNS AN APPARATUS, IN A SYSTEM FOR THE RESTITUTION OF PRE-RECORDED INFORMATION ON A DISC HAVING A SPIRAL INFORMATION TRACK, BY A NEEDLE, WHEN A RELATIVE DISC NEEDLE SPEED IS ESTABLISHED, OR NORMAL OPERATION OF THE SYSTEM CONSISTS OF A DETECT PRE-RECORDED INFORMATION ALONG SUCCESSIVE SPIRES OF THE TRACK ACCORDING TO A REGULAR PROGRESSION TOWARDS AN END. ACCORDING TO THE INVENTION, IT INCLUDES A TROLLEY 16, A READING ARM 50 CARRYING THE NEEDLE 54 AT ONE END, A MEANS FOR ELASTICALLY ATTACHING THE OTHER END OF THE ARM TO THE CART, A PERMANENT MAGNET 100 FIXED TO THE READING ARM NEARBY FROM ITS FIRST END, TWO SPACED COILS 102, 104 HAVING NON-MAGNETIC CORES, AND A MEANS FOR MOUNTING THEM ON THE CARRIAGE SO THAT THE PERMANENT MAGNET IS PLACED BETWEEN THEM, AS WELL AS A MEANS TO EXCITE THE COILS SELECTIVELY IN ORDER TO CREATE A SHIFT IN THE RADIAL LOCATION OF THE NEEDLE. THE INVENTION APPLIES IN PARTICULAR TO COLOR TELEVISIONS.

FR7928211A 1978-11-16 1979-11-15 Video disc player - has track skipping device comprising coils and permanent magnet moving needle radially across disc Withdrawn FR2441901A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB7844734 1978-11-16
US06/039,358 US4258233A (en) 1978-11-16 1979-05-15 Track skipper apparatus for video disc player

Publications (1)

Publication Number Publication Date
FR2441901A1 true FR2441901A1 (en) 1980-06-13

Family

ID=26269596

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7928211A Withdrawn FR2441901A1 (en) 1978-11-16 1979-11-15 Video disc player - has track skipping device comprising coils and permanent magnet moving needle radially across disc

Country Status (12)

Country Link
AT (1) AT373426B (en)
AU (1) AU525288B2 (en)
CA (1) CA1133633A (en)
DE (1) DE2946016C2 (en)
DK (1) DK485379A (en)
ES (1) ES485996A1 (en)
FR (1) FR2441901A1 (en)
HK (1) HK29783A (en)
IT (1) IT1124952B (en)
PL (1) PL122662B1 (en)
SE (1) SE7909298L (en)
SG (1) SG11483G (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2441900A1 (en) * 1978-11-16 1980-06-13 Rca Corp Video disc player - has track skipping device comprising electromagnet moving stylus radially across disc

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4375094A (en) * 1980-11-10 1983-02-22 Rca Corporation Apparatus for advancing a video disc pickup transducer beyond a disc record defect

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2225804A1 (en) * 1973-04-11 1974-11-08 Ted Bildplatten
JPS53112704A (en) * 1977-03-14 1978-10-02 Victor Co Of Japan Ltd Signal pickup device of rotary recording medium reproducer
JPS53113505A (en) * 1977-03-15 1978-10-04 Victor Co Of Japan Ltd Pickup device for rotary recording medium reproducing signal
US4170783A (en) * 1977-03-14 1979-10-09 Victor Company Of Japan, Ltd. Signal pickup device for reproducing an information signal recorded on a track of a rotary recording medium
FR2426953A1 (en) * 1978-05-22 1979-12-21 Rca Corp RECORDING / RESTITUTION DEVICE FACILITATING THE JUMPING OF Furrows

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2361793C2 (en) * 1973-12-12 1983-06-16 Ted Bildplatten Ag Aeg-Telefunken-Teldec, 6301 Zug Playback device for a disk-shaped recording medium

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2225804A1 (en) * 1973-04-11 1974-11-08 Ted Bildplatten
JPS53112704A (en) * 1977-03-14 1978-10-02 Victor Co Of Japan Ltd Signal pickup device of rotary recording medium reproducer
US4170783A (en) * 1977-03-14 1979-10-09 Victor Company Of Japan, Ltd. Signal pickup device for reproducing an information signal recorded on a track of a rotary recording medium
JPS53113505A (en) * 1977-03-15 1978-10-04 Victor Co Of Japan Ltd Pickup device for rotary recording medium reproducing signal
FR2426953A1 (en) * 1978-05-22 1979-12-21 Rca Corp RECORDING / RESTITUTION DEVICE FACILITATING THE JUMPING OF Furrows

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2441900A1 (en) * 1978-11-16 1980-06-13 Rca Corp Video disc player - has track skipping device comprising electromagnet moving stylus radially across disc

Also Published As

Publication number Publication date
DE2946016A1 (en) 1980-05-29
IT1124952B (en) 1986-05-14
IT7927224A0 (en) 1979-11-12
CA1133633A (en) 1982-10-12
SE7909298L (en) 1980-05-17
PL219640A1 (en) 1980-08-11
ES485996A1 (en) 1980-09-01
DE2946016C2 (en) 1984-11-08
AU5269479A (en) 1980-05-22
AU525288B2 (en) 1982-10-28
SG11483G (en) 1983-12-16
HK29783A (en) 1983-08-26
AT373426B (en) 1984-01-25
ATA729679A (en) 1983-05-15
DK485379A (en) 1980-05-17
PL122662B1 (en) 1982-08-31

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Legal Events

Date Code Title Description
ST Notification of lapse