Sparking plugs

Introduced: September 1968

IPC and CPC are identically structured here. All 10 subcodes exist in both systems.

3 shared codes have differing titles between IPC and CPC.

Child Classifications

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H01T 13/02 Details IPC+CPC Available in IPC and CPC
H01T 13/20 characterised by features of the electrodes or insulation IPC+CPC Available in IPC and CPC
H01T 13/40 structurally combined with other devices (combined or associated with fuel injectors F02M57/06; structurally combined with other parts of internal-combustion engines F02P13/00) IPC+CPC Available in IPC and CPC
H01T 13/46 having two or more spark gaps +2 CPC IPC+CPC Available in IPC and CPC
H01T 13/48 having means for rendering sparks visible IPC+CPC Available in IPC and CPC
H01T 13/50 having means for ionisation of gap (H01T13/52 takes precedence) IPC+CPC Available in IPC and CPC
H01T 13/52 characterised by a discharge along a surface IPC+CPC Available in IPC and CPC
H01T 13/54 having electrodes arranged in a partly-enclosed ignition chamber IPC+CPC Available in IPC and CPC
H01T 13/56 characterised by having component parts which are easily assembled or disassembled IPC+CPC Available in IPC and CPC
H01T 13/58 Testing (testing characteristics of the spark in internal-combustion engine ignition F02P17/12) since 2011 IPC+CPC Available in IPC and CPC