H
SECTION H — ELECTRICITY
 H01
BASIC ELECTRIC ELEMENTS
 H01

Note(s)

Processes involving only a single technical art, e.g. drying, coating, for which provision exists elsewhere are classified in the relevant class for that art.

 H01C
RESISTORS
 H01C 1/00
Details of resistors
 H01C 1/02
·  Mounting; Housing; Enclosing; Filling the housing or enclosure
 H01C 1/04
·  Arrangements of distinguishing marks, e.g. colour coding
 H01C 1/06
·  Electrostatic or electromagnetic shielding arrangements
 H01C 1/08
·  Cooling arrangements; Heating arrangements; Ventilating arrangements
 H01C 1/12
·  Current collectors, e.g. mercury contacts; Means for moving current collectors
 H01C 1/14
·  Terminals; Tapping points
 H01C 1/16
·  Resistor networks not otherwise provided for
 H01C 3/00
Non-adjustable metal resistors made of wire or ribbon, e.g. coiled, woven, or formed as grids
 H01C 3/02
·  arranged or constructed for reducing self-induction, capacitance, or variation with frequency
 H01C 3/04
·  Iron-filament ballast resistors; Similar resistors having variable temperature coefficient
 H01C 5/00
Adjustable metal resistors made of wire or ribbon, e.g. coiled, woven, formed as grids
 H01C 5/02
·  with current collectors gliding thereon
 H01C 5/04
·  with current collectors rolling thereon
 H01C 5/06
·  with one or more fixed tapping points
 H01C 5/08
·  structurally combined with a switch and having a common operating member therewith
 H01C 7/00
Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material and/or powdered semi-conducting material with or without insulating material (semi-conductor devices H01L; devices exhibiting galvanomagnetic effects H01V 5/00)
 H01C 7/02
·  having positive temperature coefficient, e.g. with layers of carbon
 H01C 7/04
·  having negative temperature coefficient, e.g. thermistor
 H01C 7/06
·  independent of temperature
 H01C 7/08
·  sensitive to radiant heat or light (dependent on the presence of a potential-jump barrier in the resistor H01L 15/06)
 H01C 7/10
·  dependent on applied voltage, e.g. varistor
 H01C 7/12
·  ·  Overvoltage protection resistors
 H01C 7/14
·  dependent on electric field applied by a control electrode insulated from the resistor, e.g. fieldistor (field-effect transistors H01L 11/14)
 H01C 7/16
·  dependent on magnetic field (applications for measuring magnetic or electric variables G01R)
 H01C 9/00
Adjustable resistors formed as one or more layers or coatings; Adjustable resistor made from powdered conducting material and/or powdered semi-conducting material with or without insulating material
 H01C 9/02
·  with current collectors gliding thereon
 H01C 9/04
·  with one or more fixed tapping points
 H01C 9/06
·  adjustable by mechanical pressure or force (resistance strain gauges G01; carbon microphones H04R 21/02)
 H01C 9/08
·  structurally combined with a switch and having a common operating member therewith
 H01C 11/00
Liquid resistors
 H01C 13/00
Resistors not covered by groups H01C 3/00-H01C 11/00
 H01C 15/00
Resistors constructed for special applications (for overvoltage protection H01C 7/12; for heating purposes H05B; adaptations for structural combination with measuring instruments G01R)
 H01C 15/02
·  Coherers or like imperfect resistors for detecting electro-magnetic waves
 H01C 15/04
·  Arresters using powdered resister material or semi-conductive material
 H01C 17/00
Apparatus or processes specially adapted for manufacturing resistors