Cyclopedia of applied electricity : a general reference work on direct-current generators and motors, storage batteries, electrochemistry, welding, electric wiring, meters, electric lighting, electric railways, power stations, switchboards, power transmission, alternating-current machinery, telegraphy, etc. . Fig. 76. Automotoneer Parts PREVENTING OF FAST FEEDING OP MANUAL CONTROLLERS A large part of the difficulty in maintaining equipments resultsfrom too rapid acceleration. Various devices have been used to pre-vent this. The multiple-unit control readily admits of automaticacceleration, but
Cyclopedia of applied electricity : a general reference work on direct-current generators and motors, storage batteries, electrochemistry, welding, electric wiring, meters, electric lighting, electric railways, power stations, switchboards, power transmission, alternating-current machinery, telegraphy, etc. . Fig. 76. Automotoneer Parts PREVENTING OF FAST FEEDING OP MANUAL CONTROLLERS A large part of the difficulty in maintaining equipments resultsfrom too rapid acceleration. Various devices have been used to pre-vent this. The multiple-unit control readily admits of automaticacceleration, but this is possible also with manual controllers. 169 74 ELECTRIC RAILWAYS Automotoneer. A simple mechanical device for this purposeis the automotoneer, illustrated in Figs. 75 and 76. This is mountedon the top of the ordinary controller. It consists of two main parts,one stationary, the other being rotated by the controller stationary part contains a zigzag groove, in which plays a mov-able tongue or pawl carried by the movable part. As the handle isrotated the pawl catches in the angles of the groove and allows the. Fig. 77. Current Limit Relay Used by DenverRailway Company handle to be rotated one notch at a time only. In order to disengagethe pawl, the handle must be moved slightly backward on eachnotch. This operation delays the movement of the controller drumsufficiently to prevent the motorman from drawing an excessiveamount of current each time the car starts, thus saving the re-placement of fuses, and wear and tear on the equipment, andpower plant. Current Limit Relay. A simple electrical device is illustrated 170
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Keywords: ., bookauthoramericantechnicalsoci, bookcentury1900, bookdecade1910
