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IPC 7
H01C-H01C01730

SECTION H – ELECTRICITY


H 01BASIC ELECTRIC ELEMENTS


H 01 CRESISTORS


Notes

(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]


Subclass Index

NON-ADJUSTABLE RESISTORS 

H01C 3/00, H01C 7/00, H01C 8/00, H01C 11/00 

ADJUSTABLE RESISTORS 

H01C 10/00 

OTHER RESISTORS 

H01C 13/00 

DETAILS 

H01C 1/00 

MANUFACTURE 

H01C 17/00 



1/

00Details

1/

01.Mounting; Supporting  [2]

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]

1/

014..the resistor being suspended between, and being supported by, two supporting sections (H01C 1/016 takes precedence)  [2]

1/

016..with compensation for resistor expansion or contraction  [2]

1/

02.Housing; Enclosing; Embedding; Filling the housing or enclosure  [2]

1/

022..the housing or enclosure being openable or separable from the resistive element  [2]

1/

024..the housing or enclosure being hermetically sealed (H01C 1/028, H01C 1/032, H01C 1/034 take precedence)  [2]

1/

026...with gaseous or vacuum spacing between the resistive element and the housing or casing  [2]

1/

028..the resistive element being embedded in insulation with outer enclosing sheath  [2]

1/

03...with powdered insulation  [2]

1/

032..plural layers surrounding the resistive element (H01C 1/028 takes precedence)  [2]

1/

034..the housing or enclosure being formed as coating or mould without outer sheath (H01C 1/032 takes precedence)  [2]

1/

036...on wound resistive element  [2]

1/

04.Arrangements of distinguishing marks, e.g. colour coding

1/

06.Electrostatic or electromagnetic shielding arrangements

1/

08.Cooling, heating, or ventilating arrangements

1/

082..using forced fluid flow  [2]

1/

084..using self-cooling, e.g. fins, heat sinks  [2]

1/

12.Arrangements of current collectors

1/

125..of fluid contacts  [2]

1/

14.Terminals or tapping points specially adapted for resistors (in general H01R); Arrangements of terminals or tapping points on resistors

1/

142..the terminals or tapping points being coated on the resistive element  [2]

1/

144..the terminals or tapping points being welded or soldered  [2]

1/

146..the resistive element surrounding the terminal  [2]

1/

148..the terminals embracing or surrounding the resistive element (H01C 1/142 takes precedence)  [2]

1/

16.Resistor networks not otherwise provided for


3/

00Non-adjustable metal resistors made of wire or ribbon, e.g. coiled, woven, or formed as grids

3/

02.arranged or constructed for reducing self-induction, capacitance, or variation with frequency

3/

04.Iron-filament ballast resistors; Other resistors having variable temperature coefficient

3/

06.Flexible or folding resistors, whereby such a resistor can be looped or collapsed upon itself  [2]

3/

08.Dimension or characteristic of resistive element changing gradually or in discrete steps from one terminal to another  [2]

3/

10.the resistive element having zig-zag or sinusoidal configuration  [2]

3/

12..lying in one plane  [2]

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]

3/

16..including two or more distinct wound elements, or two or more winding patterns  [2]

3/

18..wound on a flat or ribbon base (H01C 3/16 takes precedence)  [2]

3/

20..wound on cylindrical or prismatic base (H01C 3/16 takes precedence)  [2]


7/

00Non-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]

7/

02.having positive temperature coefficient

7/

04.having negative temperature coefficient

7/

06.including means to minimise changes in resistance with changes in temperature

7/

10.voltage responsive, i.e. varistors  [6]

7/

102..Varistor boundary, e.g. surface layers (H01C 7/12 takes precedence)  [6]

7/

105..Varistor cores (H01C 7/12 takes precedence)  [6]

7/

108...Metal oxide  [6]

7/

112....ZnO type  [6]

7/

115....Titanium dioxide- or titanate type  [6]

7/

118...Carbide, e.g. SiC type  [6]

7/

12..Overvoltage protection resistors; Arresters  [3]

7/

13.current-responsive  [2]

Note

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

7/

18.comprising a plurality of layers stacked between terminals  [2]

7/

20.the resistive layer or coating being tapered  [2]

7/

22.Elongated resistive element being bent or curved, e.g. sinusoidal, helical  [2]


8/

00Non-adjustable resistors consisting of loose powdered or granular conducting, or powdered or granular semi-conducting material  [2]

8/

02.Coherers or like imperfect resistors for detecting electromagnetic waves  [2]

8/

04.Overvoltage protection resistors; Arresters  [2,3]


10/

00Adjustable resistors  [2]

10/

02.Liquid resistors  [2]

10/

04.with specified mathematical relationship between movement of resistor actuating means and value of resistance, other than direct proportional relationship  [2]

10/

06.adjustable by short-circuiting different amounts of the resistive element  [2]

10/

08..with intervening conducting structure between the resistive element and the short-circuiting means, e.g. taps  [2]

10/

10.adjustable by mechanical pressure or force  [2]

10/

12..by changing surface pressure between resistive masses or resistive and conductive masses, e.g. pile type  [2]

10/

14.adjustable by auxiliary driving means  [2]

10/

16.including plural resistive elements  [2]

10/

18..including coarse and fine resistive elements  [2]

10/

20..Contact structure or movable resistive elements being ganged  [2]

10/

22.resistive-element dimensions changing gradually in one direction, e.g. tapered resistive element (H01C 10/04 takes precedence)  [2]

10/

23.resistive-element dimensions changing in a series of discrete, progressive steps  [2]

10/

24.the contact moving along turns of a helical resistive element, or vice versa  [2]

10/

26.resistive element moving (H01C 10/16, H01C 10/24 take precedence)  [2]

Note

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

10/

28.the contact rocking or rolling along resistive element or taps  [2]

10/

30.the contact sliding along resistive element  [2]

10/

32..the contact moving in an arcuate path  [2]

10/

34...the contact or the associated conducting structure riding on collector formed as a ring or portion thereof  [2]

10/

36...structurally combined with switching arrangements  [2]

10/

38..the contact moving along a straight path  [2]

10/

40...screw-operated  [2]

10/

42....the contact bridging and sliding along resistive element and parallel conducting bar or collector  [2]

10/

44...the contact bridging and sliding along resistive element and parallel conducting bar or collector (H01C 10/42 takes precedence)  [2]

10/

46.Arrangements of fixed resistors with intervening connectors, e.g. taps (H01C 10/28, H01C 10/30 take precedence)  [2]

10/

48..including contact movable in an arcuate path  [2]

10/

50.structurally combined with switching arrangement (H01C 10/36 takes precedence)  [2]


11/

00Non-adjustable liquid resistors  [2]


13/

00Resistors not provided for elsewhere

13/

02.Structural combinations of resistors (impedance networks H03H)  [2]


17/

00Apparatus 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]

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]

17/

04.adapted for winding the resistive element  [2]

17/

06.adapted for coating resistive material on a base  [2]

17/

065..by thick-film techniques, e.g. serigraphy  [6]

17/

07..by resistor foil bonding, e.g. cladding  [6]

17/

075..by thin-film techniques  [6]

17/

08...by vapour deposition  [2]

17/

10...by flame spraying  [2]

17/

12...by sputtering  [2]

17/

14...by chemical deposition  [2]

17/

16....using electric current  [2]

17/

18....without using electric current  [2]

17/

20..by pyrolytic processes  [2]

17/

22.adapted for trimming  [2]

17/

23..by opening or closing resistor tracks of predetermined resistive values  [6]

17/

232..Adjusting the temperature coefficient; Adjusting value of resistance by adjusting temperature coefficient  [6]

17/

235..Initial adjustment of potentiometer parts for calibration  [6]

17/

24..by removing or adding resistive material (H01C 17/23, H01C 17/232, H01C 17/235 take precedence)  [2,6]

17/

242...by laser  [6]

17/

245...by mechanical means, e.g. sand-blasting, cutting, ultrasonic treatment  [6]

17/

26..by converting resistive material  [2]

17/

28.adapted for applying terminals  [2]

17/

30.adapted for baking  [2]


  
 

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