. Factory and industrial management . are avoided and what advan-tages secured. Any one who could run the engine hoist can run thiswithout special instruction. He cannot hurt the motor by putting onthe load too fast; he cannot hurt the resistance by standing on anyone segment too long; and he cannot hurt the segments by comingback slowly or dropping back a notch or two. The principal diffi-culty in devising this mechanism was found in trying to provide a sim-ple and reliable means of performing the unlatching of the quick-return lever. This was effected by constructing a yoke embracing themain
. Factory and industrial management . are avoided and what advan-tages secured. Any one who could run the engine hoist can run thiswithout special instruction. He cannot hurt the motor by putting onthe load too fast; he cannot hurt the resistance by standing on anyone segment too long; and he cannot hurt the segments by comingback slowly or dropping back a notch or two. The principal diffi-culty in devising this mechanism was found in trying to provide a sim-ple and reliable means of performing the unlatching of the quick-return lever. This was effected by constructing a yoke embracing themain lever, giving the latter a movement of about half an inch before * This device was original with the writer, wlio was not aware of the experiments wliichwere being conducted, probably simultaneously, by the Walker Co. The first intimation hehad of other work being done in this line was the appearance of their advertisements inJune, long after the completed controller had given eminent satisfaction. ELECTRIC POWER IN SMALL UNITS. 239. CONTRCiLLER FOR ELECTRIC HOIST. Striking the yoke and carrying it along. A friction disc was providedto retard the motion of the yoke, and this holds the latter still on thereturn movement, while the roller runs up the incline and withdrawsthe latch, thus releasing the short lever. On the forward motion thelatch is down, engages with the quick-return lever, and carries italong. The operation of this controller can be as well indicated bythe description published by the Walker Company as if it had beenwritten especially for it. The mechanism of the breaking switch isso arranged that, with a movement of the controlling handle backward,the circuit is completely opened by means of this switch, leaving the[contacts] entirely dead. The circuit cannot be again closed until thecontrolling handle has been brought back to the off position. Afterthe circuit has been once opened by this slight backward movement ofthe handle, the controlling [lever] can be mov
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Keywords: ., bookcentury1800, bookdecade1890, booksubj, booksubjectengineering
