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IPC 7
  G11B 7/00 - G11B 15/70  
G11B01700-G11B02350
  G11B 25/00 - G11B 33/14  

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)


17/

00Guiding record carriers not specifically of filamentary or web form, or of supports therefor (guiding cards or sheets G06K 13/00)

17/

02.Details

17/

022..Positioning or locking of single discs  [4]

17/

025...of discs which are stationary during transducing operation  [4]

17/

028...of discs rotating during transducing operation  [4]

17/

03....in containers or trays  [4]

17/

032....Positioning by moving the door or the cover  [4]

17/

035....Positioning by moving the loading station  [4]

17/

038..Centering or locking of a plurality of discs in a single cartridge  [4]

17/

04..Feeding or guiding single record carrier to or from transducing unit

17/

08.from consecutive-access magazine of disc records

17/

10..with horizontal transfer to the turntable from a stack arranged with a vertical axis

17/

12..with axial transfer to the turntable from a stack with a vertical axis

17/

14...by mechanism in rotating centre post, e.g. permitting the playing of both sides of a record

17/

16...by mechanism in stationary centre post, e.g. with stepped post, using fingers on post

17/

18...by mechanism operating on the edge of the disc record

17/

20..with transfer away from stack on turntable after playing

17/

22.from random-access magazine of disc records

Note

 Group G11B 17/30 takes precedence over groups G11B 17/24 to G11B 17/28.

17/

24..the magazine having a toroidal or part-toroidal shape

17/

26..the magazine having a cylindrical shape with vertical axis

17/

28..the magazine having a cylindrical shape with horizontal axis

17/

30..wherein the playing unit is moved accordingly to the location of the selected record

17/

32.Maintaining desired spacing between record carrier and head, e.g. by fluid-dynamic spacing  [2]

17/

34.Guiding record carriers during transducing operation, e.g. for track following (G11B 17/32 takes precedence)  [4]


19/

00Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function (guiding such record carriers G11B 17/00)

19/

02.Control of operating function, e.g. switching from recording to reproducing  [4]

19/

04..Arrangements for preventing, inhibiting, or warning against, double recording on the same blank, or against other recording or reproducing malfunctions

19/

06..by counting or timing of machine operations

19/

08..by using devices external to the driving mechanisms, e.g. coin-freed switch (coin actuated mechanisms G07F 5/00)  [4]

19/

10..by sensing presence or absence of record in accessible stored position or on turntable

19/

12..by sensing distinguishing features of records, e.g. diameter

19/

14..by sensing movement or position of head, e.g. means moving in correspondence with head movements

19/

16..Manual control

19/

18...Manual action on one element producing control effect indirectly by consequent action of driving mechanism

19/

20.Driving; Starting; Stopping; Control thereof  [4]

19/

22..Brakes other than speed-regulating brakes (brake constructions in general F16D)

19/

24..Arrangements for providing constant relative speed between record carrier and head

19/

247...using electrical means  [4]

19/

253...using mechanical means  [4]

19/

26..Speed-changing arrangements; Reversing arrangements; Drive-transfer means therefor  [4]

19/

265...Friction wheel drive  [4]

19/

27...Belt drive  [4]

19/

275...Gear wheel drive  [4]

19/

28..Speed controlling, regulating, or indicating (G11B 19/24 takes precedence; speedometers or tachometers G01P)


20/

00Signal processing not specific to the method of recording or reproducing; Circuits therefor  [4]

20/

02.Analogue recording or reproducing  [4]

20/

04..Direct recording or reproducing  [4]

20/

06..Angle-modulation recording or reproducing (angle-modulation H03C; demodulation of angle-modulated oscillations H03D)  [4]

20/

08..Pulse-modulation recording or reproducing (pulse-code-modulation recording G11B 20/10; pulse modulation or pulse demodulation H03K)  [4]

20/

10.Digital recording or reproducing (electrical digital data processing G06F; speech analysis-synthesis techniques for redundancy reduction G10L 19/00; transmission of digital information H04L)  [4]

20/

12..Formatting, e.g. arrangement of data block or words on the record carriers  [4]

20/

14..using self-clocking codes  [4]

20/

16..using non self-clocking codes, i.e. the clock signals being either recorded in a separate clocking track or in a combination of several information tracks  [4]

20/

18..Error detection or correction; Testing  [4]

20/

20.for correction of skew for multitrack recording  [4]

20/

22.for reducing distortions  [4]

20/

24.for reducing noise  [4]


21/

00Head arrangements not specific to the method of recording or reproducing

21/

02.Driving or moving of heads

21/

03..for correcting time base error  [4]

21/

04..Automatic feed mechanism producing a transducing traverse of the head in a direction which cuts across the direction of travel of the recording medium, e.g. helical scan

21/

06...the record carrier having means to ensure traverse movement of the head

21/

08..Track changing or selecting (G11B 21/12 takes precedence)

21/

10..Track finding or aligning by moving the head

21/

12..Raising and lowering; Back-spacing or forward-spacing along track; Returning to starting position

21/

14...manually

21/

16.Supporting the heads; Supporting the sockets for plug-in heads

21/

18..while the head is moving

21/

20..while the head is in operative position but stationary or permitting minor movements to follow irregularities in surface of record carrier

21/

21...with provision for maintaining desired spacing of head from record carrier, e.g. fluid-dynamic spacing, slider  [4]

21/

22..while the head is out of operative position

21/

24..Head support adjustments

21/

26..Means for interchange or replacement of head or head element


23/

00Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus  [4]

Note

 In group G11B 23/00, recording or reproducing apparatus does not include the record carriers.  [5]

23/

02.Containers; Storing means (cabinets, cases, stands, modified to store record carriers G11B 33/04; storing webs, tapes or filamentary material in general B65H 75/00)  [4]

23/

023..Containers for magazines or cassettes  [4]

23/

027..Containers for single reels or spools  [4]

23/

03..Containers for flat record carriers  [4]

23/

033...for flexible discs  [4]

23/

037..Single reels or spools  [4]

23/

04..Magazines; Cassettes (G11B 23/12 takes precedence)

23/

06...for housing endless webs or filaments

23/

07....using a single reel or core  [4]

23/

08...for housing webs or filaments having two distinct ends

23/

087....using two different reels or cores  [4]

23/

093.....the reels or cores being coaxial  [4]

23/

107....using one reel or core, one end of the record carrier coming out of the magazine or cassette  [4]

23/

113..Apparatus or processes specially adapted for the manufacture of magazines or cassettes  [4]

23/

12..Bins for random storage of webs or filaments

23/

14.providing ability to repeat location, e.g. using sprocket holes

23/

16.Record carriers with single track for recording at spaced intervals along the track thereof, e.g. for speech or language training

23/

18.Record carriers with multiple tracks, e.g. with complementary and partial tracks such as paired "stereo" tracks

23/

20.with provision for splicing to provide permanent or temporary connections

23/

22..of endless belts; of tapes forming Möbius loops

23/

24..of tapes having multiple tracks parallel to edge of record carrier by offset splicing to form endless loop with one or more helical tracks

23/

26..of leaders for loading or threading, e.g. to form a temporary connection

23/

28.indicating prior or unauthorised use

23/

30.with provision for auxiliary signals (sensing such signals G11B 15/06)

23/

32..Electrical or mechanical contacting means; Tape stop foils

23/

34..Signal means additional to the main recording track, e.g. photoelectric sensing of sprocket holes for timing

23/

36..Signals on record carriers or on containers and recorded by the same method as the main recording

23/

38.Visual features other than those contained in record tracks or represented by sprocket holes

23/

40..Identifying or analogous means applied to, or incorporated in, the record carrier and not intended for visual display simultaneously with the playing-back of the record carrier, e.g. label, leader, photograph

23/

42..Marks for indexing, speed-controlling, synchronising, or timing

23/

44..Information for display simultaneously with playback of the record, e.g. photographic matter (associated working of cameras or projectors with sound-recording or -reproducing means G03B 31/00)  [4]

23/

50.Reconditioning of record carriers; Cleaning of record carriers (G11B 3/58 takes precedence)  [2]

  G11B 7/00 - G11B 15/70    G11B 25/00 - G11B 33/14  
 

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