characterised by features of the electrodes or insulation

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Sparking plugs > characterised by features of the electrodes or insulation

Child Classifications

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• H01T 13/22 having two or more electrodes embedded in insulation (sparking plugs having two or more spark gaps H01T13/46)
• H01T 13/24 having movable electrodes (H01T13/28 takes precedence)
• 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