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Southern Autoflow Controller
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These are some views of a Southern Autoflow controller. In later on-board controller signals the contact camshaft was horizontal run by a 1 RPM Synchron motor. This more compact design allowed 4 and 6 contact controllers to fit into 4-way signals. The 6 contact design allowed independent illumination of red and green indications, providing what are common (no overlap) sequences.
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