×
×

TAG : April/May2020

Patent Page: The Humble Spark Plug

  Gottlob Honold’s 1914 patent for a “sparking device” more closely resembles the spark plug as we know it. First patented in Germany in 1902, it featured an electro-magnetic coil (b) which pulled up the center terminal (c), breaking the ground with the spark plug body (e) to produce ...

Gas Engine Magazine

Preserving the History of Internal Combustion Engines