IPC 6 English version H01F !A-H01F 7/24

H01F-H01F00724

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]

Note

Groups H 01 F 17/00 to H 01 F 38/00 (with the exception of groups H 01 F 27/42 and H 01 F 38/32) cover only structural or constructional aspects of transformers, inductive reactors, chokes or the like. These groups do not cover circuit arrangement of such devices, which are covered by the appropriate functional places. [6]

Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties

of inorganic materials (H 01 F 1/44 takes precedence) [6]

(transferred to H 01 F 1/032)

Note

Group H 01 F 1/40 takes precedence over H 01 F 1/03 to H 01 F 1/38. [6]

characterised by their coercivity [6]

032

of hard-magnetic materials [6]

metals or alloys [6]

047

Alloys characterised by their composition [5,6]

053

containing rare earth metals [5,6]

055

and magnetic transition metals, e.g. SmCo₅ [6]

057

and IIIa elements, e.g. Nd₂Fe₁₄B [6]

058

and IVa elements, e.g. Gd₂Fe₁₄C [6]

059

and Va elements, e.g. Sm₂Fe₁₇N₂ [6]

in the form of particles, e.g. powder (H 01 F 1/047 takes precedence) [5,6]

pressed, sintered, or bound together [6]

mixtures of metallic and non-metallic particles; metallic particles having oxide skin [6]

non-metallic substances, e.g. ferrites [6]

in the form of particles [6]

113

in a bonding agent [6]

117

Flexible bodies [6]

of soft-magnetic materials [6]

metals or alloys [6]

147

Alloys characterised by their composition [5,6]

153

Amorphous metallic alloys, e.g. glassy metals [5,6]

in the form of sheets (H 01 F 1/147 takes precedence) [5,6]

with insulating coating [6]

in the form of particles, e.g. powder (H 01 F 1/147 takes precedence) [5,6]

pressed, sintered, or bound together [6]

the particles being insulated [6]

by macromolecular organic substances [6]

dispersed or suspended in a bonding agent [6]

(covered by H 01 F 1/00)

(covered by H 01 F 1/20, H 01 F 1/33, H 01 F 1/36)

mixtures of metallic and non-metallic particles; metallic particles having oxide skin [6]

non-metallic substances, e.g. ferrites [6]

in the form of particles [6]

in a bonding agent [6]

375

Flexible bodies [6]

amorphous, e.g. amorphous oxides [6]

of magnetic semiconductor materials, e.g. CdCr₂S₄(devices using galvano-magnetic or similar effects H 01 L 43/00) [6]

of organic or organo-metallic materials (H 01 F 1/44 takes precedence) [6]

of magnetic liquids, e.g. ferrofluids (particles in a bonding agent H 01 F 1/28, H 01 F 1/36) [6]

Cores, yokes, or armatures (magnetic materials H 01 F 1/00; permanent magnets H 01 F 7/02)

made from sheets

made from strips or ribbons

made from wires

made from powder (powder coatings on sheets H 01 F 3/02, on strips or ribbons H 01 F 3/04, on wires H 01 F 3/06)

Composite arrangements of magnetic circuits

Magnetic shunt paths

Constrictions; Gaps, e.g. air-gaps (in magnetic shunt paths H 01 F 3/12)

Coils (superconducting coils H 01 F 6/06; fixed inductances of the signal type H 01 F 17/00)

wound on non-magnetic supports, e.g. formers

Arrangements of electric connections to coils, e.g. leads

Insulation of windings

(transferred to H 01 F 6/06)

Superconducting magnets; Superconducting coils [6]

Quenching; Protection arrangements during quenching [6]

Cooling [6]

Coils, e.g. winding, insulating, terminating or casing arrangements therefor [6]

Magnets (superconducting magnets H 01 F 6/00; for separation of solid materials from solid materials or fluids B 03 C 1/00; for bench or like work-holders B 23 B 31/28, B 23 Q 3/00; work-holding devices B 25 B 11/00; lifting magnets B 66 C 1/00; for electric meters G 01 R; for relays H 01 H; for dynamo-electric machines H 02 K)

Permanent magnets

Means for releasing the attractive force

Electromagnets; Actuators including electromagnets [6]

with armatures

specially adapted for ac

reducing or eliminating the effects of eddy currents [6]

having anti-chattering arrangements

121

Guiding or setting position of armatures, e.g. retaining armatures in their end position [6]

122

by permanent magnet [6]

123

by ancillary coil [6]

124

by mechanical latch, e.g. detent [6]

126

Supporting or mounting [6]

127

Assembling [6]

128

Encapsulating, encasing or sealing [6]

129

of armatures [6]

characterised by pulling-force characteristic

Pivoting armatures (H 01 F 7/17 takes precedence) [6]

Rectilinearly-movable armatures (H 01 F 7/17 takes precedence) [6]

Pivoting and rectilinearly-movable armatures [6]

Circuit arrangements for obtaining desired operating characteristics, e.g. for slow operation, for sequential energisation of windings, for high-speed energisation of windings

without armatures (cores H 01 F 3/00; coils H 01 F 5/00)

(transferred to H 01 F 6/00)

H01F 10/00 - H01F 30/16