Mechanical Principles (1930) by Ralph Steiner [4min selection]
This is my favorite 4min selection of a larger work by Ralph Steiner. The original was silent, and the DVD had it set to classical music. I have swapped the audio for an electronica/industrial track by 3 Liquid Hz – Little Boy.
@ 1:16 – counter mechanism
@ 2:55 – normal gears, but cut to engage on diagonals
@ 3:37 – SQUARE GEARS!
@ 3:41 – variable speed transfer
@ 3:46 – rotary to linear action with a 4 tooth cog
Several users have commented that these gears may be on display at The Museum of Science and Industry in Chicago, IL.