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"The governor cam rod operates a plate cam having a curved slot so shaped that it takes place of both the knock—off and the safety cam. The steam arm is keyed to the valve spindle and carries at its lower end a steel die which is free to slip up and down a small amount." —Derr, 1911

Steam Engine Brown Releasing Gear

"The governor cam rod operates a plate cam having a curved slot so shaped that it takes place of both…