Discussion on “alternating-current controllers for steel mills” (Simon), “the alternating-current coal hoist” (Brown), Pittsburgh, Pa., April 16, 1915. (see proceedings for April and May, 1915)

Raymond E. Brown: One of the papers presented made mention of the desirability of having motors of a sufficient size to operate part of the time at reduced load, to keep the commutator in good shape. The desirability of low temperature limits for rheostats was also discussed.