Discussion on “electrical control of a large mine hoist” (Cheney), Pittsburgh, Pa., April 27, 1912 (see proceedings for March, 1912)

H. M. Gassman: I have had an opportunity to examine critically this installation. I can confirm all that Mr. Cheney has said in regard to the operation. I wish to emphasize particularly the smooth acceleration obtained. There was absolutely no noticeable jerking or impulse given to the rotor in starting with this type of control. Furthermore, I made it a special point, from the operating end, to inquire into the maintenance of this type of starter, and I was told by the man responsible for its operation that it is practically nothing.