The Betty lamp is likely a natural evolution of the Crusie lamp concept. It consists of two lamp pans, one above the other. Fuel drip from the upper lamp pan fell into the lower pan minimizing oil/grease mess below the lamp. Replacing the upper lamp pan with a metal wick holder inside the lower pan reduce the amount of metal needed for the lamp. Adding a top cover provided protection of the lamp's oil from insects, minimized spills and increased burning efficiency.
