This class is an integral part of Class 369, Dynamic Information Storage or Retrieval, following subclass 18 and is the specific class for apparatus and corresponding processes for the storage and retrieval of information based on relative movement between a magnetic record carrier and a transducer.
This class also includes apparatus and corresponding processes for making copies or editing of records falling within the above definition.
A magnetic record carrier within the meaning of this class is an element which consists of a magnetizable material or is comprised of a coating or impregnation of magnetizable material which is intended for the storage of more than a single bit of information. Storage elements which include discrete magnetic areas, inserts, spots, etc. each intended for the storage of single bits of information, whether or not relative motion is used in transducing that information, are not included in the above definition. See elsewhere for the
use of such elements. (See References to Other Classes, below.)
SUBCOMBINATIONS OF DYNAMIC MAGNETIC RECORDERS OR REPRODUCERS
This class includes elements forming subcombinations specific to apparatus within the class definition such as record carriers, transducers, etc.
Electrical circuits not specific to magnetic recording or reproducing which may constitute subcombinations of such apparatus are classified in the appropriate class for such circuits.
Mechanisms forming subcombinations of apparatus within the class definition are classified in the appropriate mechanical class providing for such subject matter unless claimed in significant combination with specific recorder structure. LINES WITH OTHER CLASSES
COMBINATIONS OF OTHER APPARATUS WHICH INCLUDE APPARATUS OFTHIS CLASS
Significantly claimed apparatus external to this class, claimed in combination with apparatus under the class definition, which records or reproduces some quality or quantity related to such external apparatus or its function, is classified in the class appropriate to the external apparatus.
Nominally claimed apparatus external to this class, claimed in combination with apparatus under the class definition, is classified in this class unless provided for in the appropriate external class.
Because of the placement of Class 360 into the Class 369 schedule, this class is no longer exhaustive of dynamic magnetic storage or retrieval, as to the art now classified in subclasses 1 through 18 of Class 369.
ORGANIZATION OF THIS CLASS
For the organization of this class, refer to Subclass References to the Current Class, below.
SEE OR SEARCH THIS CLASS, SUBCLASS:
1, through 17, Special Purpose Devices: devices where the major significance of the device is in its use or the result which it produces.
18, through 54, Signal Processing: for devices which are basically electronic in nature and are used to modify, correct or insure the efficient storage or retrieval of information signals.
55, through 68, General Recording or Reproducing: for methods or devices which are concerned with the physics of recording or reproducing or are electronic in nature and not limited to the types of signal processing provided for in Lines With Other Classes and Within this Class, Organization of This Class, above. 69, through 80, Automatic Control Systems: for devices which, without proximate human intervention, will actively control a mechanism of this or an external class.
81, through 101, Transport Systems: for mechanical devices which produce the relative movement between record carrier and transducer required by the class definition.
102, through 136, Physical Elements: for physical elements forming subcombinations of apparatus within the class definition that are not classifiable elsewhere.
137, for subject matter not found in subclasses 1-136.
REFERENCES TO OTHER CLASSES
SEE OR SEARCH CLASS
29, Metal Working,
603.01+, for, methods of making magnetic transducers.
84, Music,
601+, recording or reproducing means in combination with musical instruments.
106, Compositions: Coating or Plastic, plastic compositions usable in magnetic record carriers.
118, Coating Apparatus, apparatus for making coated magnetic record carriers. 148, Metal Treatment,
300+, magnetic stock material which is the result of a Class 148 treatment or which are claimed in terms of specific magnetic properties.
178, Telegraphy, recording or reproducing means combined with code transmitters or receivers.
200, Electricity: Circuit Makers and Breakers, switching devices usable in magnetic recorders or reproducers.
206, Special Receptacles and Packages,
62, receptacles for magnetic record carriers.
226, Advancing Material of Indeterminate Length, means for
advancing a record carrier past a transducer.
235, Registers,
419+, for record controlled electromechanical calculators; subclasses 439+ and 487+, sensing or analyzing mechanism and records; subclass 154, data conversion usable in magnetic recording or reproducing.
235, Registers,
449+, and 493 for the use of storage elements which include discrete magnetic areas, inserts, spots, etc., each intended for the storage of single bits of information, whether or not relative motion is used in transducing that information. (Class Definition, General Statement Of The Class Subject Matter, above) 242, Winding, Tensioning, or Guiding, provides for technology centered on refinements of winding or unwinding, tensioning and guiding elongated material combined with a nominal work station. Accordingly, Class 242 provides for inventions in winding and unwinding of magnetic tape, film, or wire where an element such as a transducer head or similar recording structure is named as a part of the winding or unwinding path. Class 360 provides for winding or guiding of a magnetic medium in combination with claimed magnetic recording or reproducing apparatus (i.e., transducing head details or closely related structure that impact the transducing function unique to this art). Class 360 provides for claimed information erasure prevention means (other than a nominally recited pin or filler), details of a single recording element (e.g., a multitract transducing head), means to extract a loop of tape from the cartridge and transfer the loop about a named transducer head, a plurality of elements peculiar to a recorder (e.g., alternately engageable record and erase heads), or structure peculiar to a recorder completely remote from winding, tensioning, or guiding (e.g., signal volume control). Search Class 242 for unwinding/rewinding drives, and subcombinations such as cartridge/cassette structure and related perfecting feature; e.g., position retainers, brakes, brake release devices, door structures, pinch rollers, guide components, cartridge/cassette housing construction and material having a specific composition, hardness, thermal property, electrical property, antistatic property, etc., particularly
324+, for unwinding and rewinding an information convertible carrier, and 335+ for guiding, unwinding, or rewinding a carrier stored in a cartridge/cassette.
252, Compositions,
62.51+, magnetic compositions.
271, Sheet Feeding or Delivering, sheet record handling.
307, Electrical Transmission or Interconnection Systems;
112+, class appropriate switching systems which are usable in dynamic information storage or retrieval.
318, Electricity: Motive Power Systems,
560+, positional servo systems; subclasses 567+, program or pattern controlled systems.
324, Electricity: Measuring and Testing,
244, magnetic field testing means usable in reproducing magnetic records; subclass 112, voltage or current storage means including magnetic storage. 326, Electronic Digital Logic Circuitry; appropriate subclasses, electronic digital logic circuits usable in dynamic magnetic information storage or retrieval.
327, Miscellaneous Active Electrical Nonlinear Devices, Circuits, and Systems;
1+, for miscellaneous signal discriminating or selecting; subclasses 100+, miscellaneous signal conversion, shaping or generating; subclasses 365+, miscellaneous gating usable in dynamic magnetic information storage or retrieval.
329, Demodulators, demodulators usable in magnetic reproduction.
330, Amplifiers, amplifiers usable in magnetic recording or reproducing.
331, Oscillators, oscillators usable in bias or erase circuits.
332, Modulators, modulators usable in magnetic recording.
333, Wave Transmission Lines and Networks,
28, equalizers usable in magnetic recording or reproducing.
336, Inductor Devices, core and coil structures similar to those of magnetic recording or reproducing transducers.
341, Coded Data Generation or Conversion, for code converters usable in or using dynamic storage techniques.
345, Computer Graphics Processing, Operator Interface Processing, and Selective Visual Display Systems, 418+, for computer s:graphics processing and subclasses 326+ for a computer operator interface.
346, Recorders, recorders usually of the s:graphic type and record carriers therefor.
352, Optics: Motion Pictures, motion picture apparatus in combination with recorders or reproducers.
353, Optics: Image Projectors, Projectors combined with recorders or reproducers.
358, Facsimile, recording or reproducing means combined with facsimile.
359, Optics: Systems (Including Communication) and Elements,
281+, and 484, magneto-optical polarization devices usable in magnetic signal reproduction.
361, Electricity: Electrical Systems and Devices,
143+, 159 and 267 for demagnetizing means for records and heads when not in combination with recorders or reproducers.
364, Electrical Computers and Data Processing Systems,
100+, for generic data processing control systems; subclasses 400+ for particular application of data processing systems or calculating computers. 365, Static Information Storage and Retrieval, appropriate subclass for magnetic, electric, or optical static storage/retrieval of information.
351+, for multiplex switching, and subclass 531 for magnetic core for switching or storage.
379, Telephonic Communications,
41, 51 and 67.1+, recorders or reproducers combined with telephones.
384, Bearings,
100+, for fluid bearings usable to space head from magnetic record carriers.
386, Television Signal Processing for Dynamic Recording or Reproducing, for recording or reproducing means combined with television receivers.
395, Information Processing System Organization,
80+, for data processing of robot control systems.
400, Typewriting Machines, appropriate subclasses for machine operators using magnetic records. 420, Alloys or Metallic Compositions, appropriate subclasses for alloys which are claimed broadly as "magnetic," "magnetized," or "permanent magnet" or alloys defined only in terms of their composition which are inherently magnetic..
427, Coating Processes, methods of making and coating magnetic record carriers.
428, Stock Material or Miscellaneous Articles, articles usable as magnetic record carriers.
430, Radiation Imagery Chemistry: Process, Composition, or Product Thereof, appropriate subclasses for radiation imagery chemistry process, composition, or product used as a storage medium.
434, Education and Demonstration, recording or reproducing means combined with significant education apparatus.
150+, for high temperature (Tc > 30 K) superconducting devices, particularly subclasses 170+ for dynamic information storage or retrieval.
704, Data Processing: Speech Signal Processing, Linguistics, Language Translation and Audio Compression/Decompression,
200+, for artificial intelligence systems that process speech signals.
706, Data Processing: Intelligent Processing Systems and Methods, various subclasses for artificial intelligence systems that represent, apply, and acquire knowledge.
708, Electrical Computers: Arithmetic Processing and Calculating,
1+, for hybrid computers, subclasses 100+ for digital calculating computers, and subclasses 800+ for analog computers. 709, Electrical Computers and Digital Data Processing Systems: Multiple Computer or Process Coordinating,
200+, for data transferring among multiple computer and digital processing systems.
711, Electrical Computers and Digital Processing Systems: Memory, appropriate subclasses for storage addressing, accessing, and control in data processing systems;
4, for addressing dynamic storage devices including address formation or manipulation and subclasses 111+ for data accessing and control techniques for dynamic storage devices
in digital data processing systems.
714, Error Detection/Correction and Fault Detection/Recovery, appropriate subclasses for generic error checking systems.