Mica_spark_plug_(Manual_of_Driving_and_Maintenance)

Published at 707 × 712 in a Brief History of Spark Plug Insulation
Textbook figure of a spark plug showing the placement of mica insulation

A mica spark plug. The numbers correspond to the following parts of the spark plug:
1) Central electrode,
2) Terminal nut,
3) Insulator locknut, or electrode nut,
4) Insulator mica rings,
5) Insulator body (porcelain),
6) Assembly nut,
7) Copper-asbestos washer,
8) Plug body,
9) Side electrode.

1 Central electrode
2 Terminal nut
3 Insulator locknut, or electrode nut
4 Insulator mica rings
5 Insulator body (porcelain)
6 Assembly nut
7 Copper-asbestos washer
8 Plug body
9 Side electrode

Creative Commons License
Mica_spark_plug_(Manual_of_Driving_and_Maintenance) by Dr C M Helm-Clark PhD is licensed under a Creative Commons Attribution 4.0 International

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