GB1361610A - Apparatus for playing disc records - Google Patents

Apparatus for playing disc records

Info

Publication number
GB1361610A
GB1361610A GB4059270A GB4059270A GB1361610A GB 1361610 A GB1361610 A GB 1361610A GB 4059270 A GB4059270 A GB 4059270A GB 4059270 A GB4059270 A GB 4059270A GB 1361610 A GB1361610 A GB 1361610A
Authority
GB
United Kingdom
Prior art keywords
pick
arm
record
coils
detector
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
GB4059270A
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.)
Plessey Co Ltd
Original Assignee
Plessey Co Ltd
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 Plessey Co Ltd filed Critical Plessey Co Ltd
Priority to GB4059270A priority Critical patent/GB1361610A/en
Publication of GB1361610A publication Critical patent/GB1361610A/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
    • 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
    • G11B3/36—Automatic-feed mechanisms producing progressive transducing traverse across record carriers otherwise than by grooves, e.g. by lead-screw

Landscapes

  • Moving Of Heads (AREA)

Abstract

1361610 Automatic control of attitude PLESSEY CO Ltd 9 Aug 1970 [24 Aug 1970] 40592/70 Heading G3R [Also in Division G5] In an arrangement for reducing tracking error in a disc record player, a servo controlled system is provided for correcting detected deviations of the longitudinal axis of a pick-up arm from a tangential position with respect to the record groove being scanned as the pick-up stylus moves over a radius of the record. Pick-up arm 1 is horizontally pivoted at 4 and 5 to a bracket 2 which is vertically pivoted 3 on a carriage 11 which is driven by a servo motor along rails 13, 14 extending parallel to a radial path over the record. The bracket is connected by an extension 6 to an iron core 7 extending through coils 8, 9 and 10 mounted on the carriage. The middle coil 9 is connected to an oscillator and the two outer coils to a balance detector. The configuration is such that when the pick-up arm longitudinal axis is tangential to the groove being scanned the arm axis is at right angles to the carriage center line and the core is positioned to provide equal coupling between coils 9 and 8 and coils 9 and 10 so that the inputs to the detector are balanced. Any deviation upsetting the balance is detected and used to vary the speed of the servo motor to correct the error. When the pick-up stylus enters the record run out groove, the large out of balance output from the detector, greater than a predetermined level, is used to operate a trip mechanism which lifts the arm and returns it to its rest position. The inductive coupling shown can be replaced by a capacitive arrangement Fig. 4 (not shown).
GB4059270A 1971-08-09 1971-08-09 Apparatus for playing disc records Expired GB1361610A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB4059270A GB1361610A (en) 1971-08-09 1971-08-09 Apparatus for playing disc records

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4059270A GB1361610A (en) 1971-08-09 1971-08-09 Apparatus for playing disc records

Publications (1)

Publication Number Publication Date
GB1361610A true GB1361610A (en) 1974-07-30

Family

ID=10415651

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4059270A Expired GB1361610A (en) 1971-08-09 1971-08-09 Apparatus for playing disc records

Country Status (1)

Country Link
GB (1) GB1361610A (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4039195A (en) * 1974-07-25 1977-08-02 Nippon Gakki Seizo Kabushiki Kaisha Pickup arm driving device in linear tracking pickup apparatus
FR2349908A1 (en) * 1976-04-28 1977-11-25 Sony Corp READING ARM DEVICE FOR PLAYBACK OF PHONOGRAPHIC OR ANALOGUE DISCS
US4083565A (en) * 1975-10-23 1978-04-11 Nippon Gakki Seizo Kabushiki Kaisha Device for correcting offset angle of pickup arm in tracking pickup apparatus
FR2389197A1 (en) * 1977-04-28 1978-11-24 Sony Corp DISC PLAYER
US4205854A (en) * 1977-03-17 1980-06-03 Plessey Handel Und Investments Ag Record players
US4216969A (en) * 1978-02-13 1980-08-12 Rca Corporation Carriage translating apparatus for video disc player
FR2460019A1 (en) * 1979-06-22 1981-01-16 Sony Corp ARRAY CONTROL DEVICE IN LINEAR DISPLACEMENT READ HEADING APPARATUS
FR2473210A1 (en) * 1979-12-20 1981-07-10 Rca Corp MECHANISM DETECTING THE RELATIVE POSITION OF A VIDEODISK NEEDLE
US4280023A (en) * 1979-07-09 1981-07-21 Rca Corporation Stylus position sensing apparatus for video disc player
US4313189A (en) * 1979-12-20 1982-01-26 Rca Corporation Stylus position sensor for video disc player apparatus

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4039195A (en) * 1974-07-25 1977-08-02 Nippon Gakki Seizo Kabushiki Kaisha Pickup arm driving device in linear tracking pickup apparatus
US4083565A (en) * 1975-10-23 1978-04-11 Nippon Gakki Seizo Kabushiki Kaisha Device for correcting offset angle of pickup arm in tracking pickup apparatus
FR2349908A1 (en) * 1976-04-28 1977-11-25 Sony Corp READING ARM DEVICE FOR PLAYBACK OF PHONOGRAPHIC OR ANALOGUE DISCS
US4205854A (en) * 1977-03-17 1980-06-03 Plessey Handel Und Investments Ag Record players
FR2389197A1 (en) * 1977-04-28 1978-11-24 Sony Corp DISC PLAYER
US4199149A (en) * 1977-04-28 1980-04-22 Sony Corporation Record player
US4216969A (en) * 1978-02-13 1980-08-12 Rca Corporation Carriage translating apparatus for video disc player
FR2460019A1 (en) * 1979-06-22 1981-01-16 Sony Corp ARRAY CONTROL DEVICE IN LINEAR DISPLACEMENT READ HEADING APPARATUS
US4280023A (en) * 1979-07-09 1981-07-21 Rca Corporation Stylus position sensing apparatus for video disc player
FR2473210A1 (en) * 1979-12-20 1981-07-10 Rca Corp MECHANISM DETECTING THE RELATIVE POSITION OF A VIDEODISK NEEDLE
US4313189A (en) * 1979-12-20 1982-01-26 Rca Corporation Stylus position sensor for video disc player apparatus

Similar Documents

Publication Publication Date Title
GB1361610A (en) Apparatus for playing disc records
GB1518822A (en) Magnetic read head positioning system
JPS589499B2 (en) Kirokubaitainokanchikino Idowoseigyosurutamenosouchi
GB1146844A (en) Transducing system
GB1499268A (en) Servo apparatus
GB1281263A (en) Memory system
GB1387253A (en) Magnetic memory
KR910005647B1 (en) Optical disk operating apparatus
GB1396834A (en) Data storage apparatus
GB1474892A (en) Method and apparatus for recording and reproducing information on a plural-track record disc
GB946428A (en) Servo positioning mechanism
GB1516322A (en) Video disc and method of playback
GB1435969A (en) Reproducing apparatus for a disc type record medium
ES413866A1 (en) Video disc playback eddy current speed control system
US4593329A (en) Magnetic data storage apparatus having a magnetic disk normally in contact with a transducer head, and method of operation
JPS63140469A (en) Detecting system for reference track of disk memory device
GB1476266A (en) Information recording transport
US3065578A (en) Signal pattern controlled machines
US3412386A (en) Random access positioning means for a magnetic disc file
GB1516972A (en) Phonographs
JPS6448276A (en) Servo track writing device
US3329876A (en) Tape control system
JPS57103136A (en) Optical disk and optical disk device
US3395326A (en) Method for improving the velocity accuracy of a servo control system
US3755795A (en) Arrival detection and data transfer control system for data

Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee