IPC 6 English version G11B 17/00-G11B 23/50

IPC ⁶ English version

G11B 7/00 - G11B 15/70

G11B01700-G11B02350

G11B 25/00 - G11B 33/14

SECTION G– PHYSICS

G 11

INFORMATION STORAGE

G 11 B

INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER (recording measured values in a way that does not require playback through a transducer G 01 D; photosensitive materials or processes for photographic purposes G 03 C; electrography, electrophotography, magnetography G 03 G; recording or playback apparatus using mechanically marked tape, e.g. punched paper tape, or using unit records, e.g. punched or magnetically marked cards, G 06 K; transferring data from one type of record carrier to another G 06 K 1/18; printing of data from record carriers G 06 K 3/00; arrangements for producing a permanent visual presentation of the output data G 06 K 15/00; arrangements or circuits for control of indicating devices using static means to present variable information G 09 G; coding, decoding or code conversion, in general H 03 M; circuits for coupling output of reproducer to radio receiver H 04 B 1/20; circuits specially adapted for television signal recording H 04 N 5/76, H 04 N 9/79; loudspeakers, microphones, gramophone pick-ups or like acoustic electromechanical transducers or circuits therefor H 04 R)

17/

Guiding record carriers not specifically of filamentary or web form, or of supports therefor (guiding cards or sheets G 06 K 13/00)

17/

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/

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/

Feeding or guiding single record carrier to or from transducing unit

17/

from consecutive-access magazine of disc records

17/

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

17/

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

17/

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

17/

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

17/

by mechanism operating on the edge of the disc record

17/

with transfer away from stack on turntable after playing

17/

from random-access magazine of disc records

Note

Group G 11 B 17/30 takes precedence over groups G 11 B 17/24 to G 11 B 17/28.

17/

the magazine having a toroidal or part-toroidal shape

17/

the magazine having a cylindrical shape with vertical axis

17/

the magazine having a cylindrical shape with horizontal axis

17/

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

17/

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

17/

Guiding record carriers during transducing operation, e.g. for track following (G 11 B 17/32 takes precedence) [4]

19/

Driving, 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 G 11 B 17/00)

19/

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

19/

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

19/

by counting or timing of machine operations

19/

by using devices external to the driving mechanisms, e.g. coin-freed switch (coin actuated mechanisms G 07 F 5/00) [4]

19/

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

19/

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

19/

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

19/

Manual control

19/

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

19/

Driving; Starting; Stopping; Control thereof [4]

19/

Brakes other than speed-regulating brakes (brake constructions in general F 16 D)

19/

Arrangements for providing constant relative speed between record carrier and head

19/

247

using electrical means [4]

19/

253

using mechanical means [4]

19/

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

19/

265

Friction wheel drive [4]

19/

Belt drive [4]

19/

275

Gear wheel drive [4]

19/

Speed controlling, regulating, or indicating (G 11 B 19/24 takes precedence; speedometers or tachometers G 01 P)

20/

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

20/

Analogue recording or reproducing [4]

20/

Direct recording or reproducing [4]

20/

Angle-modulation recording or reproducing (angle-modulation H 03 C; demodulation of angle-modulated oscillations H 03 D) [4]

20/

Pulse-modulation recording or reproducing (pulse-code-modulation recording G 11 B 20/10; pulse modulation or pulse demodulation H 03 K) [4]

20/

Digital recording or reproducing (electrical digital data processing G 06 F; transmission of digital information H 04 L) [4]

20/

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

20/

using self-clocking codes [4]

20/

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/

Error detection or correction; Testing [4]

20/

for correction of skew for multitrack recording [4]

20/

for reducing distortions [4]

20/

for reducing noise [4]

21/

Head arrangements not specific to the method of recording or reproducing

21/

Driving or moving of heads

21/

for correcting time base error [4]

21/

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/

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

21/

Track changing or selecting (G 11 B 21/12 takes precedence)

21/

Track finding or aligning by moving the head

21/

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

21/

manually

21/

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

21/

while the head is moving

21/

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

21/

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

21/

while the head is out of operative position

21/

Head support adjustments

21/

Means for interchange or replacement of head or head element

23/

Record 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 G 11 B 23/00, recording or reproducing apparatus does not include the record carriers. [5]

23/

Containers; Storing means (cabinets, cases, stands, modified to store record carriers G 11 B 33/04; storing webs, tapes or filamentary material in general B 65 H 75/00) [4]

23/

023

Containers for magazines or cassettes [4]

23/

027

Containers for single reels or spools [4]

23/

Containers for flat record carriers [4]

23/

033

for flexible discs [4]

23/

037

Single reels or spools [4]

23/

Magazines; Cassettes (G 11 B 23/12 takes precedence)

23/

for housing endless webs or filaments

23/

using a single reel or core [4]

23/

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/

Bins for random storage of webs or filaments

23/

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

23/

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

23/

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

23/

with provision for splicing to provide permanent or temporary connections

23/

of endless belts; of tapes forming Möbius loops

23/

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/

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

23/

indicating prior or unauthorised use

23/

with provision for auxiliary signals (sensing such signals G 11 B 15/06)

23/

Electrical or mechanical contacting means; Tape stop foils

23/

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

23/

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

23/

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

23/

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/

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

23/

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 G 03 B 31/00) [4]

23/

Reconditioning of record carriers; Cleaning of record carriers (G 11 B 3/58 takes precedence) [2]

G11B 7/00 - G11B 15/70

G11B 25/00 - G11B 33/14