Friday, January 22, 2021

Stearns-Knight sleeve valves


 Stearns manufactured the Stearns-Knight automobile with the Charles Yates Knight-designed sleeve valve engine, Instead of normal poppet valve arrangement, the engine uses concentric sleeves around the cylinder with ports in them to control airflow. These sleeves had to be machined very accurately, the Bryant company made the equipment to grind them. The company is still in business today, owned by the Vermont Machine Tool company.
More on the Knight here. Wikipedia on Bryant here.

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