![](http://www.alamy.com/thumbs/6/6A68C94A-2364-481B-999F-3A1496E0AD3E/2RK66K6.jpg)
Electric Trevelyan Rocker A Trevelyan Rocker is a heat driven oscillator. The edges of the slot cause the lead to expand each time the pipe tips to the side. The expanding lead pushes the side of the slot away causing the pipe to tip to the other side. This process repeats itself. from The Engineering Magazine DEVOTED TO INDUSTRIAL PROGRESS Volume XI October 1896 NEW YORK The Engineering Magazine Co
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Location: USA
Photo credit: © Historic Illustrations / Alamy / Afripics
License: Royalty Free
Model Released: No
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