Wikipedia
The Betty lamp is thought to be of German, Austrian, or Hungarian origin. The Betty Lamp first came into use in the 18th century. They were commonly made of iron or brass and were most often used in the home or workshop. These lamps burned fish oil or fat trimmings and had wicks of twisted cloth.
Betty lamps are being made today but now most people burn olive oil or vegetable oil. They are popular with living history buffs and members of third-world nations lacking other resources.
Because of its association with colonial domestic activity, the Betty lamp was chosen for the symbol of the American Home Economics Association in 1926.
Usage examples of "betty lamp".
Taking the long candlestick from the windowsill, she hurries to the betty lamp, pulls its wick out with the chain pick, and lights her candle from the hear fat flame.