H01C - Definition 
Definition statement
This subclass covers:
Electrical resistors whose effective valueis mechanically adjustable, including such resistors structurally combined with switching arrangements;
Resistors whose effective value is varied non-mechanically such as by temperature, electromagnetic waves, voltage, or current;
Fixed resistors whose effective value is, or is presumed to be, non-variable;
Non- adjustable liquid resistors;
Structural combinations of resistors;
Details of, or for, resistors;
Apparatus or processes for the manufacture of resistors.
References relevant to classification in this subclass
This subclass does not cover:
Apparatusor processes for filling or compressing insulating materialin heating element tubes | H05B 3/52 |
Resistors with a potential-jump or surface barrier, e.g. field effect resistors | H01L 29/00 |
Photoresistors and similar semiconductor devices in which radiation controls flow of current through the device | H01L 31/08 |
Magnetic-field-controlled resistors and similar devices using galvano-magnetic or similar magnetic effects | H01L 43/00 |
Bulk negative resistance effect devices | H01L 47/00 |
Impedance networks | H03H |
Informative references
Attention is drawn to the following places, which may be of interest for search:
Devices using superconductivity or hyperconductivity | H01L 39/00 |
Solid state devices for rectifying, amplifying, oscillating, or switching without a potential-jump barrier or surface barrier | H01L 45/00 |
Terminals or tapping points in general | H01R |
Printed circuits incorporating printed electric components, e.g. printed resistor, capacitor, inductor | H05K 1/16 |
Printed circuits structurally associated with non-printed electric components | H05K 1/18 |
Special rules of classification
Variable resistors, the value of which is changed non-mechanically, e.g. by voltage or temperature, are classified in main group H01C 7/00.
Glossary of terms
In this subclass, the following terms or expressions are used with the meaning indicated:
| Adjustable | Mechanically adjustable |