| IPC 7 English version |
| H01C-H01C01730 |
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| SECTION H – ELECTRICITY |
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| H 01 | BASIC ELECTRIC ELEMENTS |
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| H 01 C | RESISTORS |
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| Notes |
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| (1) | In this subclass, the following term is used with the meaning indicated: |
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| – | "adjustable" means mechanically adjustable. [2] |
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| (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] |
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| Subclass Index |
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| NON-ADJUSTABLE RESISTORS |
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| ADJUSTABLE RESISTORS |
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| OTHER RESISTORS |
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| DETAILS |
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| MANUFACTURE |
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1/ | 00 | Details |
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1/ | 01 | . | Mounting; Supporting [2] |
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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] |
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1/ | 014 | . | . | the resistor being suspended between, and being supported by, two supporting sections (H01C 1/016 takes precedence) [2] |
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1/ | 016 | . | . | with compensation for resistor expansion or contraction [2] |
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1/ | 02 | . | Housing; Enclosing; Embedding; Filling the housing or enclosure [2] |
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1/ | 022 | . | . | the housing or enclosure being openable or separable from the resistive element [2] |
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1/ | 024 | . | . | the housing or enclosure being hermetically sealed (H01C 1/028, H01C 1/032, H01C 1/034 take precedence) [2] |
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1/ | 026 | . | . | . | with gaseous or vacuum spacing between the resistive element and the housing or casing [2] |
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1/ | 028 | . | . | the resistive element being embedded in insulation with outer enclosing sheath [2] |
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1/ | 03 | . | . | . | with powdered insulation [2] |
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1/ | 032 | . | . | plural layers surrounding the resistive element (H01C 1/028 takes precedence) [2] |
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1/ | 034 | . | . | the housing or enclosure being formed as coating or mould without outer sheath (H01C 1/032 takes precedence) [2] |
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1/ | 036 | . | . | . | on wound resistive element [2] |
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1/ | 04 | . | Arrangements of distinguishing marks, e.g. colour coding |
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1/ | 06 | . | Electrostatic or electromagnetic shielding arrangements |
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1/ | 08 | . | Cooling, heating, or ventilating arrangements |
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1/ | 082 | . | . | using forced fluid flow [2] |
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1/ | 084 | . | . | using self-cooling, e.g. fins, heat sinks [2] |
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1/ | 12 | . | Arrangements of current collectors |
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1/ | 125 | . | . | of fluid contacts [2] |
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1/ | 14 | . | Terminals or tapping points specially adapted for resistors (in general H01R); Arrangements of terminals or tapping points on resistors |
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1/ | 142 | . | . | the terminals or tapping points being coated on the resistive element [2] |
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1/ | 144 | . | . | the terminals or tapping points being welded or soldered [2] |
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1/ | 146 | . | . | the resistive element surrounding the terminal [2] |
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1/ | 148 | . | . | the terminals embracing or surrounding the resistive element (H01C 1/142 takes precedence) [2] |
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1/ | 16 | . | Resistor networks not otherwise provided for |
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3/ | 00 | Non-adjustable metal resistors made of wire or ribbon, e.g. coiled, woven, or formed as grids |
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3/ | 02 | . | arranged or constructed for reducing self-induction, capacitance, or variation with frequency |
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3/ | 04 | . | Iron-filament ballast resistors; Other resistors having variable temperature coefficient |
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3/ | 06 | . | Flexible or folding resistors, whereby such a resistor can be looped or collapsed upon itself [2] |
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3/ | 08 | . | Dimension or characteristic of resistive element changing gradually or in discrete steps from one terminal to another [2] |
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3/ | 10 | . | the resistive element having zig-zag or sinusoidal configuration [2] |
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3/ | 12 | . | . | lying in one plane [2] |
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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 to H01C 3/12 take precedence) [2] |
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3/ | 16 | . | . | including two or more distinct wound elements, or two or more winding patterns [2] |
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3/ | 18 | . | . | wound on a flat or ribbon base (H01C 3/16 takes precedence) [2] |
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3/ | 20 | . | . | wound on cylindrical or prismatic base (H01C 3/16 takes precedence) [2] |
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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] |
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7/ | 02 | . | having positive temperature coefficient |
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7/ | 04 | . | having negative temperature coefficient |
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7/ | 06 | . | including means to minimise changes in resistance with changes in temperature |
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7/ | 10 | . | voltage responsive, i.e. varistors [6] |
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7/ | 102 | . | . | Varistor boundary, e.g. surface layers (H01C 7/12 takes precedence) [6] |
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7/ | 105 | . | . | Varistor cores (H01C 7/12 takes precedence) [6] |
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7/ | 108 | . | . | . | Metal oxide [6] |
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7/ | 112 | . | . | . | . | ZnO type [6] |
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7/ | 115 | . | . | . | . | Titanium dioxide- or titanate type [6] |
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7/ | 118 | . | . | . | Carbide, e.g. SiC type [6] |
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7/ | 12 | . | . | Overvoltage protection resistors; Arresters [3] |
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7/ | 13 | . | current-responsive [2] |
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| Note |
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| Groups H01C 7/02 to H01C 7/13 take precedence over groups H01C 7/18 to H01C 7/22. [2] |
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7/ | 18 | . | comprising a plurality of layers stacked between terminals [2] |
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7/ | 20 | . | the resistive layer or coating being tapered [2] |
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7/ | 22 | . | Elongated resistive element being bent or curved, e.g. sinusoidal, helical [2] |
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8/ | 00 | Non-adjustable resistors consisting of loose powdered or granular conducting, or powdered or granular semi-conducting material [2] |
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8/ | 02 | . | Coherers or like imperfect resistors for detecting electromagnetic waves [2] |
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8/ | 04 | . | Overvoltage protection resistors; Arresters [2,3] |
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10/ | 00 | Adjustable resistors [2] |
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10/ | 02 | . | Liquid resistors [2] |
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10/ | 04 | . | with specified mathematical relationship between movement of resistor actuating means and value of resistance, other than direct proportional relationship [2] |
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10/ | 06 | . | adjustable by short-circuiting different amounts of the resistive element [2] |
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10/ | 08 | . | . | with intervening conducting structure between the resistive element and the short-circuiting means, e.g. taps [2] |
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10/ | 10 | . | adjustable by mechanical pressure or force [2] |
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10/ | 12 | . | . | by changing surface pressure between resistive masses or resistive and conductive masses, e.g. pile type [2] |
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10/ | 14 | . | adjustable by auxiliary driving means [2] |
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10/ | 16 | . | including plural resistive elements [2] |
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10/ | 18 | . | . | including coarse and fine resistive elements [2] |
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10/ | 20 | . | . | Contact structure or movable resistive elements being ganged [2] |
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10/ | 22 | . | resistive-element dimensions changing gradually in one direction, e.g. tapered resistive element (H01C 10/04 takes precedence) [2] |
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10/ | 23 | . | resistive-element dimensions changing in a series of discrete, progressive steps [2] |
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10/ | 24 | . | the contact moving along turns of a helical resistive element, or vice versa [2] |
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10/ | 26 | . | resistive element moving (H01C 10/16, H01C 10/24 take precedence) [2] |
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| Note |
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| Groups H01C 10/02 to H01C 10/26 take precedence over groups H01C 10/28 to H01C 10/50. [2] |
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10/ | 28 | . | the contact rocking or rolling along resistive element or taps [2] |
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10/ | 30 | . | the contact sliding along resistive element [2] |
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10/ | 32 | . | . | the contact moving in an arcuate path [2] |
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10/ | 34 | . | . | . | the contact or the associated conducting structure riding on collector formed as a ring or portion thereof [2] |
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10/ | 36 | . | . | . | structurally combined with switching arrangements [2] |
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10/ | 38 | . | . | the contact moving along a straight path [2] |
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10/ | 40 | . | . | . | screw-operated [2] |
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10/ | 42 | . | . | . | . | the contact bridging and sliding along resistive element and parallel conducting bar or collector [2] |
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10/ | 44 | . | . | . | the contact bridging and sliding along resistive element and parallel conducting bar or collector (H01C 10/42 takes precedence) [2] |
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10/ | 46 | . | Arrangements of fixed resistors with intervening connectors, e.g. taps (H01C 10/28, H01C 10/30 take precedence) [2] |
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10/ | 48 | . | . | including contact movable in an arcuate path [2] |
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10/ | 50 | . | structurally combined with switching arrangement (H01C 10/36 takes precedence) [2] |
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11/ | 00 | Non-adjustable liquid resistors [2] |
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13/ | 00 | Resistors not provided for elsewhere |
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13/ | 02 | . | Structural combinations of resistors (impedance networks H03H) [2] |
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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] |
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17/ | 02 | . | adapted for manufacturing resistors with envelope or housing (apparatus or processes for filling or compressing insulating material in heating element tubes H05B 3/52) [2] |
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17/ | 04 | . | adapted for winding the resistive element [2] |
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17/ | 06 | . | adapted for coating resistive material on a base [2] |
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17/ | 065 | . | . | by thick-film techniques, e.g. serigraphy [6] |
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17/ | 07 | . | . | by resistor foil bonding, e.g. cladding [6] |
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17/ | 075 | . | . | by thin-film techniques [6] |
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17/ | 08 | . | . | . | by vapour deposition [2] |
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17/ | 10 | . | . | . | by flame spraying [2] |
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17/ | 12 | . | . | . | by sputtering [2] |
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17/ | 14 | . | . | . | by chemical deposition [2] |
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17/ | 16 | . | . | . | . | using electric current [2] |
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17/ | 18 | . | . | . | . | without using electric current [2] |
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17/ | 20 | . | . | by pyrolytic processes [2] |
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17/ | 22 | . | adapted for trimming [2] |
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17/ | 23 | . | . | by opening or closing resistor tracks of predetermined resistive values [6] |
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17/ | 232 | . | . | Adjusting the temperature coefficient; Adjusting value of resistance by adjusting temperature coefficient [6] |
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17/ | 235 | . | . | Initial adjustment of potentiometer parts for calibration [6] |
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17/ | 24 | . | . | by removing or adding resistive material (H01C 17/23, H01C 17/232, H01C 17/235 take precedence) [2,6] |
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17/ | 242 | . | . | . | by laser [6] |
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17/ | 245 | . | . | . | by mechanical means, e.g. sand-blasting, cutting, ultrasonic treatment [6] |
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17/ | 26 | . | . | by converting resistive material [2] |
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17/ | 28 | . | adapted for applying terminals [2] |
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17/ | 30 | . | adapted for baking [2] |
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