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FR2413745A1 - Servo control for record player pick=up arm - has pivot allowing horizontal balancing about carriage with reflector - Google Patents

Servo control for record player pick=up arm - has pivot allowing horizontal balancing about carriage with reflector

Info

Publication number
FR2413745A1
FR2413745A1 FR7739780A FR7739780A FR2413745A1 FR 2413745 A1 FR2413745 A1 FR 2413745A1 FR 7739780 A FR7739780 A FR 7739780A FR 7739780 A FR7739780 A FR 7739780A FR 2413745 A1 FR2413745 A1 FR 2413745A1
Authority
FR
France
Prior art keywords
arm
carriage
pick
servo control
reflector
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Withdrawn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
FR7739780A
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.)
PASCOLINI JEAN CHARLES
Original Assignee
PASCOLINI JEAN CHARLES
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 PASCOLINI JEAN CHARLES filed Critical PASCOLINI JEAN CHARLES
Priority to FR7739780A priority Critical patent/FR2413745A1/en
Publication of FR2413745A1 publication Critical patent/FR2413745A1/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Withdrawn legal-status Critical Current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

Landscapes

  • Optical Recording Or Reproduction (AREA)

Abstract

The record player has optical servo control system to monitor pick up arm to ensure that it remains perpendicular to radius of record disc. The record disc(4) is rotated by a motor driven platform (2). A point (7) on a pick up head (6) contacts grooves in the disc and is moved by an arm (5) with counterweight (8). A pivot (9) allows horizontal balancing about a carriage (10) on which an arm (15) carries a reflecting surface. A luminous source (20) provides radiation for the reflecting surface which is directed to a detector (23) whose signals drive a motor (33) via a printed circuit (30). A gearing (34, 35) to an endless screw shaft (36) permits positioning of carriage and pick up arm.
FR7739780A 1977-12-30 1977-12-30 Servo control for record player pick=up arm - has pivot allowing horizontal balancing about carriage with reflector Withdrawn FR2413745A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7739780A FR2413745A1 (en) 1977-12-30 1977-12-30 Servo control for record player pick=up arm - has pivot allowing horizontal balancing about carriage with reflector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7739780A FR2413745A1 (en) 1977-12-30 1977-12-30 Servo control for record player pick=up arm - has pivot allowing horizontal balancing about carriage with reflector

Publications (1)

Publication Number Publication Date
FR2413745A1 true FR2413745A1 (en) 1979-07-27

Family

ID=9199546

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7739780A Withdrawn FR2413745A1 (en) 1977-12-30 1977-12-30 Servo control for record player pick=up arm - has pivot allowing horizontal balancing about carriage with reflector

Country Status (1)

Country Link
FR (1) FR2413745A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2458122A1 (en) * 1979-05-31 1980-12-26 Bulgarsko Radio COMPENSATION DEVICE FOR THE HORIZONTAL ANGULAR ERROR OF AN ELECTROPHONE ARM

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3059934A (en) * 1957-05-23 1962-10-23 Urmenyi Laszlo Pick-up arm
GB1093649A (en) * 1964-06-06 1967-12-06 Matsushita Electric Ind Co Ltd Phonograph
US3826505A (en) * 1971-03-25 1974-07-30 R Birch Pickup guidance mechanisms
US3850435A (en) * 1970-05-13 1974-11-26 R Birch Gramophone pickup guidance mechanisms
US3920249A (en) * 1971-03-25 1975-11-18 Richard Wykeham Beaufoy Birch Pickup guidance mechanisms
US3924860A (en) * 1973-02-17 1975-12-09 Sony Corp Pick-up arm assembly
GB1460443A (en) * 1973-01-15 1977-01-06 Rushton R H Gramophone pick-up arms

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3059934A (en) * 1957-05-23 1962-10-23 Urmenyi Laszlo Pick-up arm
GB1093649A (en) * 1964-06-06 1967-12-06 Matsushita Electric Ind Co Ltd Phonograph
US3850435A (en) * 1970-05-13 1974-11-26 R Birch Gramophone pickup guidance mechanisms
US3826505A (en) * 1971-03-25 1974-07-30 R Birch Pickup guidance mechanisms
US3920249A (en) * 1971-03-25 1975-11-18 Richard Wykeham Beaufoy Birch Pickup guidance mechanisms
GB1460443A (en) * 1973-01-15 1977-01-06 Rushton R H Gramophone pick-up arms
US3924860A (en) * 1973-02-17 1975-12-09 Sony Corp Pick-up arm assembly

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2458122A1 (en) * 1979-05-31 1980-12-26 Bulgarsko Radio COMPENSATION DEVICE FOR THE HORIZONTAL ANGULAR ERROR OF AN ELECTROPHONE ARM

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Legal Events

Date Code Title Description
ST Notification of lapse