International Library of Technology · Scranton, International Textbook Co. · leaf 440
^CF- Fig. 9. compression cup, compresses one of the springs, and pro-duces the desired pressure of the wheel against the trolleywire. To increase the force with which the wheel is pressedagainst the trolley wire, tighten the nuts c, c; this will causesome slack in rods ^, ^, so that the nuts ;/, n… … nuts n, n altogether. In the Nuttall trolley, it is possibleeither to swing the trolley around or to let it stand straightup and rock it over in the opposite direction. All trolleystands do not admit of this, but it is a good feature, becausein case a pole is bent, as shown in Fig. 10, rocking the…
Electrical engineering
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