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 sub-class, the term "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 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
 H01C 7/13
·  current-responsive  [2]
 H01C 7/18 - 
H01C 7/22

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  [2]
 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]