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ES8104619A1 - Stylus position sensing apparatus for a disc record player - Google Patents

Stylus position sensing apparatus for a disc record player

Info

Publication number
ES8104619A1
ES8104619A1 ES493176A ES493176A ES8104619A1 ES 8104619 A1 ES8104619 A1 ES 8104619A1 ES 493176 A ES493176 A ES 493176A ES 493176 A ES493176 A ES 493176A ES 8104619 A1 ES8104619 A1 ES 8104619A1
Authority
ES
Spain
Prior art keywords
stylus
carriage
pickup
electrode
arm
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
ES493176A
Other languages
Spanish (es)
Other versions
ES493176A0 (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 US06/055,976 external-priority patent/US4280023A/en
Application filed by RCA Corp filed Critical RCA Corp
Publication of ES493176A0 publication Critical patent/ES493176A0/en
Publication of ES8104619A1 publication Critical patent/ES8104619A1/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
    • G11B9/00—Recording or reproducing using a method not covered by one of the main groups G11B3/00 - G11B7/00; Record carriers therefor
    • G11B9/06—Recording or reproducing using a method not covered by one of the main groups G11B3/00 - G11B7/00; Record carriers therefor using record carriers having variable electrical capacitance; Record carriers therefor
    • 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
    • G11B21/04—Automatic feed mechanism producing a progressive transducing traverse of the head in a direction which cuts across the direction of travel of the recording medium, e.g. helical scan, e.g. by lead-screw
    • 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
    • G11B21/04—Automatic feed mechanism producing a progressive transducing traverse of the head in a direction which cuts across the direction of travel of the recording medium, e.g. helical scan, e.g. by lead-screw
    • G11B21/06—Automatic feed mechanism producing a progressive transducing traverse of the head in a direction which cuts across the direction of travel of the recording medium, e.g. helical scan, e.g. by lead-screw the record carrier having mechanical means to ensure traverse movement of the head, e.g. grooves

Landscapes

  • Moving Of Heads (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)

Abstract

In a video disc player, a stylus arm (24), carrying a track following stylus (20) at one end thereof, has its other end secured to a carriage by a compliant member (30). The carriage is translated along a path disposed radially of the disc record during playback. Pickup circuits (52) are employed for sensing the variations in a signal representative capacitance formed between an electrode incorporated in the pickup stylus and conductive material disposed in the record to recover pre- recorded information from a spiral track disposed on the record. A stylus position indicative capacitance (94, 98) established between a first electrode secured to the stylus arm and coupled to the pickup circuits and a second electrode mounted to the carriage in the vicinity of the first electrode, is provided. In an embodiment, the stylus position representative capacitance is formed between a signal coupling flylead (38) of the stylus and the second electrode which is mounted on a cartridge (32) housing the stylus in the carriage. Circuitry (108-112) is provided for sensing signals appearing at the output of the pickup circuits to generate a signal indicative of the position of the pickup stylus relative to the arm cage. The rate of translation of the carriage is varied (46) in response to the stylus position indicative signal to maintain a desired relationship between the pickup stylus and the arm cage.
ES493176A 1979-07-09 1980-07-07 Stylus position sensing apparatus for a disc record player Expired ES8104619A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US5564879A 1979-07-09 1979-07-09
US06/055,976 US4280023A (en) 1979-07-09 1979-07-09 Stylus position sensing apparatus for video disc player

Publications (2)

Publication Number Publication Date
ES493176A0 ES493176A0 (en) 1981-04-01
ES8104619A1 true ES8104619A1 (en) 1981-04-01

Family

ID=26734479

Family Applications (1)

Application Number Title Priority Date Filing Date
ES493176A Expired ES8104619A1 (en) 1979-07-09 1980-07-07 Stylus position sensing apparatus for a disc record player

Country Status (11)

Country Link
AT (1) AT374945B (en)
AU (1) AU539371B2 (en)
DE (1) DE3026050C2 (en)
DK (1) DK294680A (en)
ES (1) ES8104619A1 (en)
FI (1) FI802125A7 (en)
FR (1) FR2461325A1 (en)
GB (1) GB2056721B (en)
IT (1) IT1131334B (en)
NL (1) NL8003937A (en)
PL (1) PL135026B1 (en)

Families Citing this family (4)

* 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
JPS58188340A (en) * 1982-04-28 1983-11-02 Sony Corp Optical reproducer
US4504941A (en) * 1983-01-28 1985-03-12 Rca Corporation Stylus cartridge having stylus arm restraint
CA1241741A (en) * 1984-05-24 1988-09-06 Robert A. Scranton Variable impedance contrast in data storage media

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2915315A (en) * 1954-06-14 1959-12-01 Libman Max L Servo arm for phonograph pickups
DE2361793C2 (en) * 1973-12-12 1983-06-16 Ted Bildplatten Ag Aeg-Telefunken-Teldec, 6301 Zug Playback device for a disk-shaped recording medium
JPS5936345B2 (en) * 1977-04-28 1984-09-03 ソニー株式会社 Linear movement type tone arm device

Also Published As

Publication number Publication date
PL135026B1 (en) 1985-09-30
DE3026050A1 (en) 1981-02-19
AT374945B (en) 1984-06-12
AU539371B2 (en) 1984-09-27
IT1131334B (en) 1986-06-18
FR2461325A1 (en) 1981-01-30
GB2056721A (en) 1981-03-18
GB2056721B (en) 1983-05-05
ATA355080A (en) 1983-10-15
PL225556A1 (en) 1981-04-10
ES493176A0 (en) 1981-04-01
DK294680A (en) 1981-01-10
AU6004780A (en) 1981-01-15
IT8022833A0 (en) 1980-06-17
NL8003937A (en) 1981-01-13
DE3026050C2 (en) 1986-01-16
FI802125A7 (en) 1981-01-01

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Legal Events

Date Code Title Description
FD1A Patent lapsed

Effective date: 19990601