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FR2325142A1 - Magnetic coupling for video pickup arm - includes pot magnet system to give faithful reproduction from video track - Google Patents

Magnetic coupling for video pickup arm - includes pot magnet system to give faithful reproduction from video track

Info

Publication number
FR2325142A1
FR2325142A1 FR7628039A FR7628039A FR2325142A1 FR 2325142 A1 FR2325142 A1 FR 2325142A1 FR 7628039 A FR7628039 A FR 7628039A FR 7628039 A FR7628039 A FR 7628039A FR 2325142 A1 FR2325142 A1 FR 2325142A1
Authority
FR
France
Prior art keywords
video
magnetic coupling
magnet system
pickup arm
faithful reproduction
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.)
Granted
Application number
FR7628039A
Other languages
French (fr)
Other versions
FR2325142B1 (en
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 US05/667,388 external-priority patent/US4040635A/en
Application filed by RCA Corp filed Critical RCA Corp
Publication of FR2325142A1 publication Critical patent/FR2325142A1/en
Application granted granted Critical
Publication of FR2325142B1 publication Critical patent/FR2325142B1/fr
Granted 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
    • G11B3/20—Supporting in balanced, counterbalanced or loaded operative position during transducing, e.g. loading in direction of traverse by elastic means, e.g. spring
    • G11B3/26—Supporting in balanced, counterbalanced or loaded operative position during transducing, e.g. loading in direction of traverse by elastic means, e.g. spring acting to increase pressure on record
    • 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
    • G11B3/08—Raising, lowering, traversing otherwise than for transducing, arresting, or holding-up heads against record carriers
    • 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
    • G11B3/34—Driving or guiding during transducing operation
    • 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
    • G11B3/44—Styli, e.g. sapphire, diamond
    • G11B3/46—Constructions or forms ; Dispositions or mountings, e.g. attachment of point to shank

Landscapes

  • Moving Of Heads (AREA)
  • Supporting Of Heads In Record-Carrier Devices (AREA)
  • Position Input By Displaying (AREA)
  • Apparatus For Radiation Diagnosis (AREA)

Abstract

The separable coupling is for the arm of a video disc reproducer. A first coupling element (54) on the end of the arm (51) is of magnetisable material. A second coupling element in the form of a support (64) located on the support (34) is likewise of magnetisable material and has walls enclosing a chamber (70) containing a permanent magnet (71) arranged centrally so that an annular gap is formed. The first coupling element can be brought into proximity with the face containing this annular gap leaving a gap between them which is greater than the gap between the permanent magnet and the walls of the chamber, so as to ensure the flux between the magnet and the walls is greater than between the magnet and the coupling plate. This ensures a true transfer of periodic movements.
FR7628039A 1975-09-18 1976-09-17 Magnetic coupling for video pickup arm - includes pot magnet system to give faithful reproduction from video track Granted FR2325142A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB3845875 1975-09-18
US05/667,388 US4040635A (en) 1975-09-18 1976-03-16 Releasable stylus arm magnetic coupling

Publications (2)

Publication Number Publication Date
FR2325142A1 true FR2325142A1 (en) 1977-04-15
FR2325142B1 FR2325142B1 (en) 1983-03-11

Family

ID=26263815

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7628039A Granted FR2325142A1 (en) 1975-09-18 1976-09-17 Magnetic coupling for video pickup arm - includes pot magnet system to give faithful reproduction from video track

Country Status (3)

Country Link
JP (2) JPS5253402A (en)
DE (2) DE2660134C2 (en)
FR (1) FR2325142A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2325138A1 (en) * 1975-09-18 1977-04-15 Rca Corp Adjusting mechanism for video disc recorder - has adjustable fixing for spring loading of reproduction point tip
FR2325139A1 (en) * 1975-09-18 1977-04-15 Rca Corp Play back arm for video disc player - has mounting plate for arm suspended by flexible bands for retraction into protective housing
FR2325143A1 (en) * 1975-09-18 1977-04-15 Rca Corp Video disc player with removable processing unit - has cam shaped connections to prevent damage to mechanism

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4333174A (en) * 1980-06-30 1982-06-01 Rca Corporation Transducer displacement apparatus for video disc player

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3495838A (en) * 1967-01-13 1970-02-17 Dual Gebrueder Steidinger Phonograph pickup with resettable scanning needle
FR2223773A1 (en) * 1973-03-26 1974-10-25 Rca Corp
US3917903A (en) * 1974-11-12 1975-11-04 Rca Corp Detachable pickup arm magnetic coupling
FR2291668A1 (en) * 1974-11-12 1976-06-11 Rca Corp CELL FOR READING ARMS
FR2291669A1 (en) * 1974-11-12 1976-06-11 Rca Corp CELL FORMING ASSEMBLY FOR READING ARMS
FR2324090A1 (en) * 1975-09-15 1977-04-08 Rca Corp PLAYBACK SUBJECT TO A SPRING-FORMING ELEMENT FOR VIDEODISC PLAYBACK
FR2325138A1 (en) * 1975-09-18 1977-04-15 Rca Corp Adjusting mechanism for video disc recorder - has adjustable fixing for spring loading of reproduction point tip
FR2325139A1 (en) * 1975-09-18 1977-04-15 Rca Corp Play back arm for video disc player - has mounting plate for arm suspended by flexible bands for retraction into protective housing

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1426328A (en) * 1972-04-19 1976-02-25 Rca Corp Stylus arm structure
USB351598I5 (en) * 1973-04-16 1975-01-28

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3495838A (en) * 1967-01-13 1970-02-17 Dual Gebrueder Steidinger Phonograph pickup with resettable scanning needle
FR2223773A1 (en) * 1973-03-26 1974-10-25 Rca Corp
US3917903A (en) * 1974-11-12 1975-11-04 Rca Corp Detachable pickup arm magnetic coupling
FR2291668A1 (en) * 1974-11-12 1976-06-11 Rca Corp CELL FOR READING ARMS
FR2291669A1 (en) * 1974-11-12 1976-06-11 Rca Corp CELL FORMING ASSEMBLY FOR READING ARMS
FR2324090A1 (en) * 1975-09-15 1977-04-08 Rca Corp PLAYBACK SUBJECT TO A SPRING-FORMING ELEMENT FOR VIDEODISC PLAYBACK
FR2325138A1 (en) * 1975-09-18 1977-04-15 Rca Corp Adjusting mechanism for video disc recorder - has adjustable fixing for spring loading of reproduction point tip
FR2325139A1 (en) * 1975-09-18 1977-04-15 Rca Corp Play back arm for video disc player - has mounting plate for arm suspended by flexible bands for retraction into protective housing

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2325138A1 (en) * 1975-09-18 1977-04-15 Rca Corp Adjusting mechanism for video disc recorder - has adjustable fixing for spring loading of reproduction point tip
FR2325139A1 (en) * 1975-09-18 1977-04-15 Rca Corp Play back arm for video disc player - has mounting plate for arm suspended by flexible bands for retraction into protective housing
FR2325143A1 (en) * 1975-09-18 1977-04-15 Rca Corp Video disc player with removable processing unit - has cam shaped connections to prevent damage to mechanism

Also Published As

Publication number Publication date
DE2641297C2 (en) 1984-01-26
JPS53111702A (en) 1978-09-29
FR2325142B1 (en) 1983-03-11
DE2641297A1 (en) 1977-04-14
JPS5333245B2 (en) 1978-09-13
DE2660134C2 (en) 1984-08-09
JPS6014401B2 (en) 1985-04-13
JPS5253402A (en) 1977-04-30

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Legal Events

Date Code Title Description
ST Notification of lapse