Motion Lamps...1950s nostalgia and some physics

I do remember these from my youth. I had one that depicted a forest fire. What a great way to fall asleep when frightened about those monsters under the bed.

tvlamps.net...

Motion lamps have a long history, with variations on the design made even today. These ingenious devices used the lightbulb-generated heat to rotate one cylinder behind another, making flames leap, clouds float, boats sail etc. The heyday of motion lamps was the 1950s, with Econolite Corporation and L.A. Goodman Manufacturing (which later became Lacolite Industries) being the predominant makers, although brands like National and Scene-In-Action pioneered the format back in the '30s.