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IPC 7
  G11 - G11B 5/86  
G11B00700-G11B01570
  G11B 17/00 - G11B 23/50  

SECTION G – PHYSICS


G 11INFORMATION STORAGE


G 11 BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER (recording measured values in a way that does not require playback through a transducer G01D; photosensitive materials or processes for photographic purposes G03C; electrography, electrophotography, magnetography G03G; recording or playback apparatus using mechanically marked tape, e.g. punched paper tape, or using unit records, e.g. punched or magnetically marked cards, G06K; transferring data from one type of record carrier to another G06K 1/18; printing of data from record carriers G06K 3/00; arrangements for producing a permanent visual presentation of the output data G06K 15/00; arrangements or circuits for control of indicating devices using static means to present variable information G09G; details of scanning-probe apparatus, in general G12B 21/00; coding, decoding or code conversion, in general H03M; circuits for coupling output of reproducer to radio receiver H04B 1/20; television signal recording H04N 5/76, H04N 9/79; loudspeakers, microphones, gramophone pick-ups or like acoustic electromechanical transducers or circuits therefor H04R)


7/

00Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation, reproducing using an optical beam at lower power; Record carriers therefor (G11B 11/00, G11B 13/00 take precedence) [4,7]

7/

002.Recording, reproducing or erasing systems characterised by the shape of the carrier [7]

 

7/

0025..with cylinders or cylinder-like carriers, e.g. truncated cones [7]

 

7/

003..with webs, e.g. belts, spooled tapes or films of quasi-infinite extent [7]

 

7/

0033..with cards [7]

 

7/

0037..with discs [7]

 

7/

004.Recording, reproducing or erasing methods; Read, write or erase circuits therefor [7]

 

7/

0045..Recording (G11B 7/006, G11B 7/0065 take precedence) [7]

 

7/

005..Reproducing (G11B 7/0065 takes precedence) [7]

 

7/

0055..Erasing (G11B 7/006, G11B 7/0065 take precedence) [7]

 

7/

006..Overwriting (G11B 7/0065 takes precedence) [7]

 

7/

0065..Recording, reproducing or erasing by using optical interference patterns, e.g. holograms [7]

 

7/

007.Arrangement of the information on the record carrier, e.g. form of tracks  [4]

7/

013..for discrete information, i.e. where each information unit is stored in a distinct location  [4]

7/

08.Disposition or mounting of heads or light sources relatively to record carriers

7/

085..with provision for moving the light beam into, or out of, its operative position (modulating by information signals G11B 7/12; controlling the position or direction of light beams, i.e. deflection, G02F 1/29)  [4]

7/

09..with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following  [4]

7/

095...specially adapted for discs, e.g. for compensation of eccentricity or wobble  [4]

7/

10..Interchangeable mountings, e.g. for replacement of head without readjustment

7/

12.Heads

7/

125..Optical beam sources therefor (light-emitting diodes H01L 33/00; semiconductor lasers H01S 5/00); Modulators, e.g. means for controlling the size or intensity of the optical spot or of the optical trace (electro-, magneto-, or acousto-optical modulators G02F 1/00; optical diaphragms G03B 9/02)  [4]

7/

13..Optical detectors therefor (optical detectors in general G01J; demodulating light, transferring the modulation of modulated light, frequency changing of light G02F 2/00)  [4]

7/

135..Means for guiding the beam from source to record carrier or from record carrier to detector  [4]

7/

14..adapted to record on, or to reproduce from, more than one track simultaneously (G11B 7/20 takes precedence)

7/

16..using filters, e.g. colour filter

7/

18..using optical slits

7/

20..Dual-recording arrangements, i.e. in which the information is recorded in two different forms simultaneously on the same or related tracks, e.g. recording instantaneous and mean values (sound-recording combined with cinematography G03C)

7/

22..Apparatus or processes specially adapted for the manufacture of heads, e.g. assembly

7/

24.Record carriers characterised by the selection of the material or by the structure or form (characterised by the arrangement of information on the carrier G11B 7/007; photosensitive materials per se G03C)  [4]

7/

26..Apparatus or processes specially adapted for the manufacture of record carriers (processes involving a single technical art and for which provision exists elsewhere, see the relevant class, e.g. B29, G03)

7/

28.Re-recording, i.e. transcribing information from one optical record carrier on to one or more similar or dissimilar record carriers using optical sensing means

7/

30.Rewritable carriers (G11B 7/24 takes precedence) [7]

 


9/

00Recording or reproducing using a method or means not covered by one of the main groups G11B 3/00 to G11B 7/00; Record carriers therefor (G11B 11/00 takes precedence) [4]

Note

 In this group, group G11B 9/12 takes precedence over groups G11B 9/02 to G11B 9/10  [7]

9/

02.using ferroelectric record carriers; Record carriers therefor

9/

04.using record carriers having variable electric resistance; Record carriers therefor

9/

06.using record carriers having variable electrical capacitance; Record carriers therefor (G11B 9/02 takes precedence)

9/

07..Heads for reproducing capacitive information  [4]

9/

08.using electrostatic charge injection; Record carriers therefor

9/

10.using electron beam; Record carriers therefor (G11B 9/08 takes precedence)  [4]

9/

12.using near-field interactions; Record carriers therefor [7]

 

9/

14..using microscopic probe means [7]

 


11/

00Recording on, or reproducing from, the same record carrier wherein for these two operations the methods or means are covered by different main groups of groups G11B 3/00 to G11B 7/00 or by different subgroups of group G11B 9/00; Record carriers therefor

Note

 In this group, group G11B 11/24 takes precedence over groups G11B 11/03 to G11B 11/16  [7]

11/

03.using recording by deforming with non-mechanical means, e.g. laser, beam of particles  [4]

11/

05..with reproducing by capacitive means  [4]

11/

06..with reproducing by mechanical sensing  [4]

11/

08.using recording by electric charge or by variation of electric resistance or capacitance

11/

10.using recording by magnetisation or demagnetisation  [4]

11/

105..using a beam of light or a magnetic field for recording and a beam of light for reproducing, e.g. light-induced thermo-magnetic recording, Kerr effect reproducing [7]

 

11/

11..using a beam other than a beam of light for recording [7]

 

11/

115..using a beam other than a beam of light for reproducing [7]

 

11/

12.using recording by optical means (G11B 11/03 takes precedence)  [4]

11/

14..with reproducing by magnetic means

11/

16.using recording by mechanical cutting, deforming or pressing

11/

18..with reproducing by optical means

11/

20..with reproducing by magnetic means

11/

22..with reproducing by capacitive means  [4]

11/

24.using recording by near-field interactions [7]

 

11/

26..using microscopic probe means [7]

 


13/

00Recording simultaneously or selectively by methods or means covered by different main groups; Record carriers therefor; Reproducing simultaneously or selectively therefrom [1,7]

 

Notes

(1)This group covers arrangements in which there are at least two recordings of information involving two different methods or means or two different physical properties, at the same or different locations, on the same record carrier, the recordings being made or reproduced simultaneously or selectively. [7]

(2)Where such combinations of means are used for changing only one main property, classification is only made in one of the relevant main groups G11B 3/00, G11B 5/00, G11B 7/00, G11B 9/00 or G11B 11/00. [7]

13/

02.magnetically and by styli (G11B 13/08 takes precedence) [1,7]

13/

04.magnetically and optically (G11B 13/08 takes precedence) [1,7]

13/

06.optically and by styli (G11B 13/08 takes precedence) [1,7]

13/

08.using near-field interactions or transducing means and at least one other method or means for recording or reproducing [7]

 


15/

00Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function (driving or guiding heads G11B 3/00 to G11B 7/00, G11B 21/00) [2]

15/

02.Control of operating function, e.g. switching from recording to reproducing

15/

03..by using counters  [4]

15/

04..Preventing, inhibiting, or warning against accidental erasing or double recording (G11B 15/05 takes precedence)  [4]

15/

05..by sensing features present on, or derived from, record carrier or container (G11B 15/16 takes precedence)  [4]

15/

06...by sensing auxiliary features on record carriers or containers, e.g. to stop machine near the end of a tape

15/

07....on containers  [4]

15/

08....by photoelectric sensing (G11B 15/07 takes precedence)  [4]

15/

087...by sensing recorded signals  [4]

15/

093...by sensing driving condition of record carrier, e.g. travel, tape tension  [4]

15/

10..Manually-operated control; Solenoid-operated control

15/

12..Masking of heads; Selecting or switching of heads between operative and inoperative functions; Masking of beams, e.g. of light beams

15/

14...Masking or switching periodically, e.g. of rotating heads

15/

16..by sensing presence, absence or position of record carrier or container

15/

17...of container  [4]

15/

18.Driving; Starting; Stopping; Arrangements for control or regulation thereof

15/

20..Moving record carrier backwards or forwards by finite amounts, i.e. back-spacing, forward-spacing

15/

22..Stopping means (slowing-down preparatory to stopping or speed-changing G11B 15/48; speed-controlling by mechanical linkage G11B 15/50; brake constructions in general F16D)

15/

24..Drive-disengaging means

15/

26..Driving record carriers by members acting directly or indirectly thereon

15/

28...through rollers driving by frictional contact with the record carrier, e.g. capstan; Multiple arrangements of capstans or drums coupled to means for controlling the speed of the drive; Multiple capstan systems alternately engageable with record carrier to provide reversal

15/

29....through pinch-rollers (G11B 15/295 takes precedence)  [4]

15/

295....with single capstan or drum simultaneously driving the record carrier at two separate points of an isolated part thereof, e.g. the capstan acting directly on the tape rollers  [4]

15/

30...through the means for supporting the record carrier, e.g. mandrel, turntable

15/

32...through the reels or cores on to which the record carrier is wound

15/

34...through non-slip drive means, e.g. sprocket

15/

38..Driving record carriers by pneumatic means

15/

40..Driving record carriers otherwise than by electric motor

15/

42...manually

15/

43..Control or regulation of mechanical tension of record carrier, e.g. tape tension

15/

44..Speed-changing arrangements; Reversing arrangements; Drive-transfer means therefor

15/

46..Controlling, regulating, or indicating speed

15/

467...in arrangements for recording or reproducing wherein both record carriers and heads are driven  [4]

15/

473....by controlling the speed of the heads  [4]

15/

48...Starting; Accelerating; Decelerating; Arrangements preventing malfunction during drive change

15/

50...by mechanical linkage, e.g. clutch

15/

52...by using signals recorded on, or derived from, record carrier

15/

54...by stroboscope; by tachometer (speedometers or tachometers G01P)

15/

56.the record carrier having reserve loop, e.g. to minimise inertia during acceleration

15/

58..with vacuum column

15/

60.Guiding record carriers (guiding devices structurally associated with magazines or cassettes G11B 23/04)  [4]

15/

61..on drum, e.g. on drum containing rotating heads  [4]

15/

62..Maintaining desired spacing between record carrier and head

15/

64...by fluid-dynamic spacing

15/

66..Threading; Loading; Automatic self-loading

15/

665...by extracting loop of record carrier from container  [4]

15/

67...by extracting end of record carrier from container or spool  [4]

15/

675.Guiding containers  [4]

15/

68..Automatic cassette-changing arrangements  [2]

15/

70.the record carrier being an endless-loop record-carrier  [2]

  G11 - G11B 5/86    G11B 17/00 - G11B 23/50  
 

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