IPC 6 English version H01F 10/00-H01F 30/16

IPC ⁶ English version

H01F - H01F 7/24

H01F01000-H01F03016

H01F 31/00 - H01F 41/28

SECTION H– ELECTRICITY

H 01

BASIC ELECTRIC ELEMENTS

H 01 F

MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES (ceramics based on ferrites C 04 B 35/26; alloys C 22 C; thermomagnetic devices H 01 L 37/00; loudspeakers, microphones, gramophone pick-ups or like acoustic electromechanical transducers H 04 R) [2]

10/

Thin magnetic films, e.g. of one-domain structure (magnetic record carriers G 11 B 5/00; thin-film magnetic stores G 11 C)

10/

characterised by the coupling or physical contact with connecting or interacting conductors

10/

characterised by magnetic layers (applying thin magnetic films to substrates H 01 F 41/14) [3]

10/

characterised by the composition [3]

10/

being metals or alloys (intermetallic compounds H 01 F 10/18) [3]

10/

containing iron or nickel (H 01 F 10/16 takes precedence) [3]

10/

containing cobalt [3]

10/

being compounds [3]

10/

Ferrites [3]

10/

Orthoferrites [3]

10/

Garnets [3]

10/

characterised by the substrate or intermediate layers [3]

10/

characterised by the composition of the substrate [3]

10/

characterised by the composition of intermediate layers [3]

13/

Apparatus or processes for magnetising or demagnetising (for degaussing ships B 63 G 9/06; for clocks or watches G 04 D 9/00; demagnetising arrangements for colour television H 04 N 9/29)

15/

(transferred to H 01 F 27/00)

15/

(transferred to H 01 F 27/00, H 01 F 27/02, H 01 F 27/06, covered by H 01 F 27/00)

15/

(transferred to H 01 F 27/36)

15/

(transferred to H 01 F 27/00, H 01 F 27/08, covered by H 01 F 27/00)

15/

(transferred to H 01 F 27/23)

15/

(transferred to H 01 F 21/12, H 01 F 27/29, H 01 F 29/02, H 01 R 9/00)

15/

(transferred to H 01 F 27/00)

15/

(transferred to H 01 F 21/00, H 01 F 30/08)

15/

(transferred to H 01 F 27/00)

15/

(transferred to H 01 F 27/42)

17/

Fixed inductances of the signal type (coils in general H 01 F 5/00)

17/

without magnetic core

17/

with ceramic former

17/

with magnetic core

17/

with core substantially closed in itself, e.g. toroid

17/

Loading coils for telecommunication circuits

19/

Fixed transformers or mutual inductances of the signal type (H 01 F 36/00 takes precedence) [3]

19/

Audio-frequency transformers or mutual inductances, i.e. not suitable for handling frequencies considerably beyond the audio range

19/

Transformers or mutual inductances suitable for handling frequencies considerably beyond the audio range (resonant circuits H 03 H)

19/

Broad-band transformers, e.g. suitable for handling frequencies well down into the audio range

19/

Transformers having magnetic bias, e.g. for handling pulses

21/

Variable inductances or transformers of the signal type (H 01 F 36/00 takes precedence) [3]

21/

continuously variable, e.g. variometers

21/

by relative movement of turns or parts of windings

21/

by movement of core or part of core relative to the windings as a whole

21/

by varying the permeability of the core, e.g. by varying magnetic bias

21/

by means of a movable shield

21/

discontinuously variable, e.g. tapped

23/

(transferred to H 01 F 38/14)

27/

Details of transformers or inductances, in general [6]

27/

Casings

27/

Leading of conductors or axles through casings, e.g. for tap-changing arrangements

27/

Mounting, supporting, or suspending transformers, reactors, or choke coils

27/

Cooling (heat-transfer elements F 28 F); Ventilating (structural details of casings H 01 F 27/02)

27/

Liquid cooling

27/

Oil cooling

27/

Expansion chambers; Oil conservators; Gas cushions; Arrangements for purifying, drying, or filling

27/

Water cooling

27/

by evaporating liquids

27/

Cooling by special gases or non-ambient air

27/

Cooling by heat conduction through solid or powdered fillings

27/

Corrosion protection [6]

27/

Magnetic cores

27/

245

made from sheets, e.g. grain-oriented (H 01 F 27/26 takes precedence) [5]

27/

made from strips or ribbons (H 01 F 27/26 takes precedence) [5]

27/

255

made from particles (H 01 F 27/26 takes precedence) [5]

27/

Fastening parts of the core together; Fastening or mounting the core on casing or support (on coil H 01 F 27/30)

27/

Coils; Windings; Conductive connections

27/

Terminals; Tapping arrangements [6]

27/

Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support

27/

Insulating of coils, windings, or parts thereof

27/

Arrangements for noise damping

27/

Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields

27/

Electric or magnetic shields or screens (movable for varying inductance H 01 F 21/10) [6]

27/

Auxiliary core members; Auxiliary coils or windings

27/

Structural association with built-in electric component, e.g. fuse

27/

Circuits specially adapted for the purpose of modifying, or compensating for, electric characteristics of transformers, reactors, or choke coils (circuits for controlling transformers, reactors or choke coils, for the purpose of obtaining a desired output H 02 P 13/00; impedance networks H 03 H) [6]

29/

Variable transformers or inductances not covered by group H 01 F 21/00

29/

with tappings on coil or winding; with provision for rearrangement or interconnection of windings

29/

having provision for tap-changing without interrupting the load current

29/

with current collector gliding or rolling on or along winding

29/

with core, coil, winding, or shield movable to offset variation of voltage or phase shift, e.g. induction regulators

29/

having movable part of magnetic circuit

29/

having movable coil, winding, or part thereof; having movable shield

29/

with variable magnetic bias (magnetic amplifiers H 03 F)

30/

Fixed transformers not covered by group H 01 F 19/00 [6]

30/

Auto-transformers [6]

30/

having two or more secondary windings, each supplying a separate load, e.g. for radio set power supplies [6]

30/

characterised by the structure [6]

30/

without magnetic core [6]

30/

Single-phase transformers (H 01 F 30/16 takes precedence) [6]

30/

Two-phase, three-phase or polyphase transformers [6]

30/

for changing the number of phases [6]

30/

Toroidal transformers [6]

H01F - H01F 7/24

H01F 31/00 - H01F 41/28