IPC Subgroup
H01T 13/2 characterised by features of the electrodes or insulation
Introduced: September 1968
Last revised: January 2006
Full Title
Sparking plugs > characterised by features of the electrodes or insulation
Classification Context
- Section:
- ELECTRICITY
- Class:
- ELECTRIC ELEMENTS
- Subclass:
- SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
8 direct subcodes
Child Classifications
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- H01T 13/22 having two or more electrodes embedded in insulation
- H01T 13/24 having movable electrodes
- H01T 13/28 having spherically shaped electrodes, e.g. ball-shaped
- H01T 13/32 characterised by features of the earthed electrode
- H01T 13/34 characterised by the mounting of electrodes in insulation, e.g. by embedding
- H01T 13/36 characterised by the joint between insulation and body, e.g. using cement
- H01T 13/38 Selection of materials for insulation
- H01T 13/39 Selection of materials for electrodes