Discussion on “motor and control equipment of electrically operated valves” (Gassman), Pittsburgh, Pa., April 25, 1912. (see proceedings for May, 1912)

H. A. Knoener: A mechanical motion could be arranged which would help out matters in connection with sticking or jammed seats on large valves. For instance, the valve stem could be so arranged that it would have a lost motion when opening or closing the valve. This would allow the motor to get up to full speed before being called upon do do the work required to release a jam. This is particularly applicable to gate valves.