GB1461399A - Pick-up arm apparatus for video disc players - Google Patents

Pick-up arm apparatus for video disc players

Info

Publication number
GB1461399A
GB1461399A GB3149076A GB3149076A GB1461399A GB 1461399 A GB1461399 A GB 1461399A GB 3149076 A GB3149076 A GB 3149076A GB 3149076 A GB3149076 A GB 3149076A GB 1461399 A GB1461399 A GB 1461399A
Authority
GB
United Kingdom
Prior art keywords
transmission line
tuned circuit
pick
march
video disc
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
GB3149076A
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
Application filed by RCA Corp filed Critical RCA Corp
Priority to GB3149076A priority Critical patent/GB1461399A/en
Publication of GB1461399A publication Critical patent/GB1461399A/en
Priority to HK12381A priority patent/HK12381A/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
    • G11B9/07—Heads for reproducing capacitive information

Landscapes

  • Indexing, Searching, Synchronizing, And The Amount Of Synchronization Travel Of Record Carriers (AREA)

Abstract

1461399 Capacitive playback of disc records RCA CORPORATION 19 March 1974 [26 March 1973] 31490/76 Divided out of 1461398 Heading G5R In a playback system of the type using a tuned circuit including a transmission line TL and the varying capacitance 11 between a disc record and a stylus, the transmission line has a length between a quarter and a half wavelength at frequencies within the range of variation of the resonant frequency of the tuned circuit and has an end loading including a voltage variable capacitance 80, undesired variations in the resonant frequency of the tuned circuit being opposed by the application of a control voltage to the voltage variable capacitance 80 by means of a tuning control circuit (130), Fig. 6 (not shown). The transmission line TL may be formed by the stylussupport arm and a housing therefor, as disclosed in Specification 1,461,398.
GB3149076A 1973-03-26 1973-03-26 Pick-up arm apparatus for video disc players Expired GB1461399A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB3149076A GB1461399A (en) 1973-03-26 1973-03-26 Pick-up arm apparatus for video disc players
HK12381A HK12381A (en) 1973-03-26 1981-04-02 Pickup arm apparatus for video disc players

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3149076A GB1461399A (en) 1973-03-26 1973-03-26 Pick-up arm apparatus for video disc players

Publications (1)

Publication Number Publication Date
GB1461399A true GB1461399A (en) 1977-01-13

Family

ID=10323860

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3149076A Expired GB1461399A (en) 1973-03-26 1973-03-26 Pick-up arm apparatus for video disc players

Country Status (1)

Country Link
GB (1) GB1461399A (en)

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Legal Events

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