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

Note(s)

  1. In this subclass, the following term is used with the meaning indicated:
    • "adjustable" means mechanically adjustable. [2]
  2. Variable resistors, the value of which is changed non-mechanically, e.g. by voltage or temperature, are classified in group H01C 7/00[2]
 H01C 1/00
Details
 H01C 1/01
·  Mounting; Supporting  [2]
 H01C 1/012
·  ·  the base extending along, and imparting rigidity or reinforcement to, the resistive element (H01C 1/016 takes precedence; the resistive element being formed in two or more coils or loops as a spiral, helical, or toroidal winding H01C 3/18, H01C 3/20; the resistive element being formed as one or more layers or coatings on a base H01C 7/00)  [2]
 H01C 1/014
·  ·  the resistor being suspended between, and being supported by, two supporting sections (H01C 1/016 takes precedence)  [2]
 H01C 1/016
·  ·  with compensation for resistor expansion or contraction  [2]
 H01C 1/02
·  Housing; Enclosing; Embedding; Filling the housing or enclosure  [2]
 H01C 1/022
·  ·  the housing or enclosure being openable or separable from the resistive element  [2]
 H01C 1/024
·  ·  the housing or enclosure being hermetically sealed (H01C 1/028, H01C 1/032, H01C 1/034 take precedence)  [2]
 H01C 1/026
·  ·  ·  with gaseous or vacuum spacing between the resistive element and the housing or casing  [2]
 H01C 1/028
·  ·  the resistive element being embedded in insulation with outer enclosing sheath  [2]
 H01C 1/03
·  ·  ·  with powdered insulation  [2]
 H01C 1/032
·  ·  plural layers surrounding the resistive element (H01C 1/028 takes precedence)  [2]
 H01C 1/034
·  ·  the housing or enclosure being formed as coating or mold without outer sheath (H01C 1/032 takes precedence)  [2]
 H01C 1/036
·  ·  ·  on wound resistive element  [2]
 H01C 1/04
·  Arrangements of distinguishing marks, e.g. colour coding
 H01C 1/06
·  Electrostatic or electromagnetic shielding arrangements
 H01C 1/08
·  Cooling, heating, or ventilating arrangements
 H01C 1/082
·  ·  using forced fluid flow  [2]
 H01C 1/084
·  ·  using self-cooling, e.g. fins, heat sinks  [2]
 H01C 1/12
·  Arrangements of current collectors
 H01C 1/125
·  ·  of fluid contacts  [2]
 H01C 1/14
·  Terminals or tapping points specially adapted for resistors (in general H01R); Arrangements of terminals or tapping points on resistors
 H01C 1/142
·  ·  the terminals or tapping points being coated on the resistive element  [2]
 H01C 1/144
·  ·  the terminals or tapping points being welded or soldered  [2]
 H01C 1/146
·  ·  the resistive element surrounding the terminal  [2]
 H01C 1/148
·  ·  the terminals embracing or surrounding the resistive element (H01C 1/142 takes precedence)  [2]
 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; Other resistors having variable temperature coefficient
 H01C 3/06
·  Flexible or folding resistors, whereby such a resistor can be looped or collapsed upon itself  [2]
 H01C 3/08
·  Dimension or characteristic of resistive element changing gradually or in discrete steps from one terminal to another  [2]
 H01C 3/10
·  the resistive element having zig-zag or sinusoidal configuration  [2]
 H01C 3/12
·  ·  lying in one plane  [2]
 H01C 3/14
·  the resistive element being formed in two or more coils or loops continuously wound as a spiral, helical, or toroidal winding (H01C 3/02-H01C 3/12 take precedence)  [2]
 H01C 3/16
·  ·  including two or more distinct wound elements, or two or more winding patterns  [2]
 H01C 3/18
·  ·  wound on a flat or ribbon base (H01C 3/16 takes precedence)  [2]
 H01C 3/20
·  ·  wound on cylindrical or prismatic base (H01C 3/16 takes precedence)  [2]
 H01C 7/00
Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material (consisting of loose powdered or granular material H01C 8/00; resistors with a potential-jump barrier or surface barrier, e.g. field effect resistors, H01L 29/00; semiconductor devices sensitive to electromagnetic or corpuscular radiation, e.g. photoresistors, H01L 31/00; devices using superconductivity or hyperconductivity H01L 39/00; devices using galvano-magnetic or similar magnetic effects, e.g. magnetic-field-controlled resistors, H01L 43/00; solid state devices for rectifying, amplifying, oscillating, or switching without a potential-jump barrier or surface barrier H01L 45/00; bulk negative resistance effect devices H01L 47/00)  [2]
 H01C 7/02
·  having positive temperature coefficient
 H01C 7/04
·  having negative temperature coefficient
 H01C 7/06
·  including means to minimise changes in resistance with changes in temperature
 H01C 7/10
·  voltage-responsive
 H01C 7/12
·  ·  Overvoltage protection resistors; Arresters  [3]
 H01C 7/13
·  current-responsive  [2]
 H01C 7/18 - 
H01C 7/20

Note(s)

Groups H01C 7/02-H01C 7/13 take precedence over groups H01C 7/18-H01C 7/22[2]

 H01C 7/18
·  comprising a plurality of layers stacked between terminals  [2]
 H01C 7/20
·  the resistive layer or coating being tapered  [2]
 H01C 7/22
·  Elongated resistive element being bent or curved, e.g. sinusoidal, helical  [2]
 H01C 8/00
Non-adjustable resistors consisting of loose powdered or granular conducting, or powdered or granular semi-conducting material  [2]
 H01C 8/02
·  Coherers or like imperfect resistors for detecting electromagnetic waves  [2]
 H01C 8/04
·  Overvoltage protection resistors; Arresters  [3]
 H01C 10/00
Adjustable resistors  [2]
 H01C 10/02
·  Liquid resistors  [2]
 H01C 10/04
·  with specified mathematical relationship between movement of resistor actuating means and value of resistance, other than direct proportional relationship  [2]
 H01C 10/06
·  adjustable by short-circuiting different amounts of the resistive element  [2]
 H01C 10/08
·  ·  with intervening conducting structure between the resistive element and the short-circuiting means, e.g. taps  [2]
 H01C 10/10
·  adjustable by mechanical pressure or force  [2]
 H01C 10/12
·  ·  by changing surface pressure between resistive masses or resistive and conductive masses, e.g. pile type  [2]
 H01C 10/14
·  adjustable by auxiliary driving means  [2]
 H01C 10/16
·  including plural resistive elements  [2]
 H01C 10/18
·  ·  including coarse and fine resistive elements  [2]
 H01C 10/20
·  ·  Contact structure or movable resistive elements being ganged  [2]
 H01C 10/22
·  resistive-element dimensions changing gradually in one direction, e.g. tapered resistive element (H01C 10/04 takes precedence)  [2]
 H01C 10/23
·  resistive-element dimensions changing in a series of discrete, progressive steps  [2]
 H01C 10/24
·  the contact moving along turns of a helical resistive element, or vice versa  [2]
 H01C 10/26
·  resistive element moving (H01C 10/16, H01C 10/24 take precedence)  [2]
 H01C 10/28 - 
H01C 10/50

Note(s)

Groups H01C 10/02-H01C 10/26 take precedence over groups H01C 10/28-H01C 10/50[2]

 H01C 10/28
·  the contact rocking or rolling along resistive element or taps  [2]
 H01C 10/30
·  the contact sliding along resistive element  [2]
 H01C 10/32
·  ·  the contact moving in an arcuate path  [2]
 H01C 10/34
·  ·  ·  the contact or the associated conducting structure riding on collector formed as a ring or portion thereof  [2]
 H01C 10/36
·  ·  ·  structurally combined with switching arrangements  [2]
 H01C 10/38
·  ·  the contact moving along a straight path  [2]
 H01C 10/40
·  ·  ·  screw-operated  [2]
 H01C 10/42
·  ·  ·  ·  the contact bridging and sliding along resistive element and parallel conducting bar or collector  [2]
 H01C 10/44
·  ·  ·  the contact bridging and sliding along resistive element and parallel conducting bar or collector (H01C 10/42 takes precedence)  [2]
 H01C 10/46
·  Arrangements of fixed resistors with intervening connectors, e.g. taps (H01C 10/28, H01C 10/30 take precedence)  [2]
 H01C 10/48
·  ·  including contact movable in an arcuate path  [2]
 H01C 10/50
·  structurally combined with switching arrangement (H01C 10/36 takes precedence)  [2]
 H01C 11/00
Non-adjustable liquid resistors  [2]
 H01C 13/00
Resistors not provided for elsewhere
 H01C 13/02
·  Structural combinations of resistors (impedance networks per se H03H)  [2]
 H01C 17/00
Apparatus or processes specially adapted for manufacturing resistors (providing fillings for housings or enclosures H01C 1/02; reducing insulation surrounding a resistor to powder H01C 1/03; manufacture of thermally variable resistors H01C 7/02, H01C 7/04)  [2]
 H01C 17/02
·  adapted for manufacturing resistors with envelope or housing  [2]
 H01C 17/04
·  adapted for winding the resistive element  [2]
 H01C 17/06
·  adapted for coating resistive material on a base  [2]
 H01C 17/08
·  ·  by vapour deposition  [2]
 H01C 17/10
·  ·  by flame spraying  [2]
 H01C 17/12
·  ·  by sputtering  [2]
 H01C 17/14
·  ·  by chemical deposition  [2]
 H01C 17/16
·  ·  ·  using electric current  [2]
 H01C 17/18
·  ·  ·  without using electric current  [2]
 H01C 17/20
·  ·  by pyrolytic processes  [2]
 H01C 17/22
·  adapted for trimming  [2]
 H01C 17/24
·  ·  by removing or adding resistive material  [2]
 H01C 17/26
·  ·  by converting resistive material  [2]
 H01C 17/28
·  adapted for applying terminals  [2]
 H01C 17/30
·  adapted for baking  [2]