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A 1:10 scale model of an unusual blowing engine (Zylindergebläse) made by (and for?) the Berg- und Hüttenverwaltung Brixlegg in Austria is on display at the Vienna Technical Museum.
The method of driving the beams which operate the pinions is not apparent.
The main point of interest is the use of narrow staggered teeth on the rack-and-pinion drive to the pistons.