St. John, Thomas M. (Thomas Matthew), b. 1865 · New York, T. M. St. John · leaf 170
a wipe-spark at the tip of the burner. Alternate pulls shut offthe gas. As the lever brings the attached wire A, in con-ta(ft with the wire B, a bright spark passes, which ignitesthe gas, the burner being joined with a battery and in-dudtion or spark coil. Automatic burners are used when it is…
Electricity
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