GB1373512A - Recording and playback of a signal - Google Patents

Recording and playback of a signal

Info

Publication number
GB1373512A
GB1373512A GB1199471A GB1199471A GB1373512A GB 1373512 A GB1373512 A GB 1373512A GB 1199471 A GB1199471 A GB 1199471A GB 1199471 A GB1199471 A GB 1199471A GB 1373512 A GB1373512 A GB 1373512A
Authority
GB
United Kingdom
Prior art keywords
film
groove
recording
april
electron beam
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
GB1199471A
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.)
Decca Ltd
Original Assignee
Decca 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 Decca Ltd filed Critical Decca Ltd
Priority to GB1199471A priority Critical patent/GB1373512A/en
Priority to CA140,729A priority patent/CA953023A/en
Priority to NL7205719A priority patent/NL7205719A/xx
Priority to FR7214989A priority patent/FR2136736A5/fr
Priority to IT6830472A priority patent/IT954782B/en
Priority to DE19722220773 priority patent/DE2220773A1/en
Priority to BE782886A priority patent/BE782886A/en
Publication of GB1373512A publication Critical patent/GB1373512A/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
    • G11B9/10—Recording or reproducing using a method not covered by one of the main groups G11B3/00 - G11B7/00; Record carriers therefor using electron beam; Record carriers therefor

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Manufacturing Optical Record Carriers (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Optical Record Carriers And Manufacture Thereof (AREA)

Abstract

1373512 Recording and playing back grooves by electron beams DECCA Ltd 27 April 1972 [28 April 1971] 11994/71 Heading G5R A modulated spiral groove is formed in a thermoplastics film 11 on a conductive member 12 by means of an intensity-modulated electron beam which deposits electric charge on the rotating film, which is heated and then cooled to form the groove, the groove being played back by directing an electron beam thereat and at an acute angle to the film 11, and collecting at 36 electrons emitted from the surface by scattering or secondary emission, to form an electrical signal. The collector 36 may be a scintillation detector, Fig. 2 (not shown). The recording method is described in detail in Specification 1,373,511; a metal film may be evaporated on to a record so produced, which is then tilted through about 45 degrees and played back as above. The metal layer is used as a negative for pressings.
GB1199471A 1971-04-28 1971-04-28 Recording and playback of a signal Expired GB1373512A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
GB1199471A GB1373512A (en) 1971-04-28 1971-04-28 Recording and playback of a signal
CA140,729A CA953023A (en) 1971-04-28 1972-04-27 Playback of a recorded groove
NL7205719A NL7205719A (en) 1971-04-28 1972-04-27
FR7214989A FR2136736A5 (en) 1971-04-28 1972-04-27
IT6830472A IT954782B (en) 1971-04-28 1972-04-27 PROCEDURE AND DEVICE FOR THE REPRODUCTION OF A SIGNAL RECORDED IN THE FORM OF WAVE VARIATIONS IN A RUT
DE19722220773 DE2220773A1 (en) 1971-04-28 1972-04-27 Reproduction method with guide grooves and device for its implementation
BE782886A BE782886A (en) 1971-04-28 1972-04-28 RETURN OF A RECORDING CARRIED BY A SILLON

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1199471A GB1373512A (en) 1971-04-28 1971-04-28 Recording and playback of a signal

Publications (1)

Publication Number Publication Date
GB1373512A true GB1373512A (en) 1974-11-13

Family

ID=9996484

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1199471A Expired GB1373512A (en) 1971-04-28 1971-04-28 Recording and playback of a signal

Country Status (7)

Country Link
BE (1) BE782886A (en)
CA (1) CA953023A (en)
DE (1) DE2220773A1 (en)
FR (1) FR2136736A5 (en)
GB (1) GB1373512A (en)
IT (1) IT954782B (en)
NL (1) NL7205719A (en)

Also Published As

Publication number Publication date
IT954782B (en) 1973-09-15
NL7205719A (en) 1972-10-31
FR2136736A5 (en) 1972-12-22
DE2220773A1 (en) 1972-11-09
CA953023A (en) 1974-08-13
BE782886A (en) 1972-09-01

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Legal Events

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