FR2291571B1 - - Google Patents

Info

Publication number
FR2291571B1
FR2291571B1 FR7535048A FR7535048A FR2291571B1 FR 2291571 B1 FR2291571 B1 FR 2291571B1 FR 7535048 A FR7535048 A FR 7535048A FR 7535048 A FR7535048 A FR 7535048A FR 2291571 B1 FR2291571 B1 FR 2291571B1
Authority
FR
France
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
FR7535048A
Other versions
FR2291571A1 (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 to GB4992674A priority Critical patent/GB1524032A/en
Application filed by RCA Corp filed Critical RCA Corp
Publication of FR2291571A1 publication Critical patent/FR2291571A1/fr
Application granted granted Critical
Publication of FR2291571B1 publication Critical patent/FR2291571B1/fr
Expired legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B9/00Recording or reproducing using a method not covered by one of the main groups G11B3/00 - G11B7/00; Record carriers therefor
    • G11B9/06Recording 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
    • G11B9/07Heads for reproducing capacitive information
    • G11B9/075Heads for reproducing capacitive information using mechanical contact with record carrier, e.g. by stylus
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B3/00Recording by mechanical cutting, deforming or pressing, e.g. of grooves or pits; Reproducing by mechanical sensing; Record carriers therefor
    • G11B3/44Styli, e.g. sapphire, diamond
    • G11B3/46Constructions or forms Disposition or mounting, e.g. attachment of point to shank
    • G11B3/48Needles
FR7535048A 1974-11-18 1975-11-17 Expired FR2291571B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB4992674A GB1524032A (en) 1974-11-18 1974-11-18 Video disc stylus

Publications (2)

Publication Number Publication Date
FR2291571A1 FR2291571A1 (fr) 1976-06-11
FR2291571B1 true FR2291571B1 (fr) 1979-05-11

Family

ID=10454033

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7535048A Expired FR2291571B1 (fr) 1974-11-18 1975-11-17

Country Status (6)

Country Link
US (1) US4031546A (fr)
JP (2) JPS5647601B2 (fr)
CA (1) CA1075810A (fr)
DE (1) DE2551794C3 (fr)
FR (1) FR2291571B1 (fr)
GB (1) GB1524032A (fr)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4491941A (en) * 1976-04-08 1985-01-01 Victor Company Of Japan, Ltd. Reproducing stylus for an information signal recording medium
CA1130456A (fr) * 1976-04-08 1982-08-24 Hisao Kinjo Systeme d'enregistrement de signaux d'information
GB1592361A (en) * 1976-09-13 1981-07-08 Rca Corp Stylus manufacture
US4273967A (en) * 1976-11-17 1981-06-16 Victor Company Of Japan, Limited Stylus for reproducing capacitive videodisc
JPS5757771B2 (fr) * 1976-11-17 1982-12-06 Victor Company Of Japan
US4497052A (en) * 1976-11-17 1985-01-29 Victor Company Of Japan, Ltd. Stylus for reproducing information signals recorded on a recording medium
NL179765C (en) * 1976-11-17 1986-11-03 Victor Company Of Japan Needle for displaying information signals registered on a record medium.
JPS5395802U (fr) * 1977-01-06 1978-08-04
US4162510A (en) * 1977-03-25 1979-07-24 Rca Corporation Keel-tipped stylus for video disc systems
US4104832A (en) * 1977-03-25 1978-08-08 Rca Corporation Method for forming keel-tipped stylus for video disc systems
US4098030A (en) * 1977-03-28 1978-07-04 Rca Corporation Method for forming a narrowed-electrode pickup stylus for video disc systems
US4124867A (en) * 1977-03-28 1978-11-07 Rca Corporation Narrowed-electrode pickup stylus for video disc systems
JPS54141901U (fr) * 1978-03-25 1979-10-02
US4315358A (en) * 1980-04-21 1982-02-16 Rca Corporation Method for the manufacture of capacitive pickup styli
JPS57120247A (en) * 1981-12-07 1982-07-27 Victor Co Of Japan Ltd Reproducing stylus
JPH0374335B2 (fr) * 1983-06-16 1991-11-26
JPH0523301A (ja) * 1991-07-24 1993-02-02 Kowa Co 視野計

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3930117A (en) * 1974-11-14 1975-12-30 Rca Corp Video capacitive disc playback apparatus and stylus with dielectric coating therefor

Also Published As

Publication number Publication date
JPS5647601B2 (fr) 1981-11-11
GB1524032A (en) 1978-09-06
US4031546A (en) 1977-06-21
DE2551794C3 (fr) 1979-09-06
CA1075810A1 (fr)
CA1075810A (fr) 1980-04-15
JPS5284724A (en) 1977-07-14
JPS5172403A (ja) 1976-06-23
DE2551794B2 (fr) 1979-01-11
FR2291571A1 (fr) 1976-06-11
DE2551794A1 (de) 1976-05-20

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Legal Events

Date Code Title Description
ST Notification of lapse