The term "pilot light" is also used occasionally for an electrical indicator light that illuminates to show that electrical power is available, or that an electrical device is operating. Now it is more common to light a burner electrically, but gas pilot lights are still used when a high energy ignition source is necessary, as in when lighting a large burner.Ī United States patent was filed for a "safety gas-control system" by two employees of the Newark, NJ-based Public Service Gas Company, Conrad Shuck, Jr. Originally a pilot light was kept permanently alight, but this wastes gas. The large opening allowed for the manual lighting of the pilot light by a lit match or taperĪ pilot light is a small gas flame, usually natural gas or liquefied petroleum gas, which serves as an ignition source for a more powerful gas burner. Merker tankless gas-fired water heater from the 1930s, with pilot light clearly visible through the aperture in the front cover.
Not to be confused with a small ON/OFF indicator lamp.
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