International Library of Technology · Scranton, International Textbook Co. · leaf 359
f cutting turns in or out.By having the secondary coil movable, it can be arrangedso that the amount of magnetic flux passing through it canbe varied, thus varying also the amount of the pressureadded to or subtracted from the line. In other regulators,both the primary and the secondary coils are… … Fig. 66. gradual steps than can be obtained with the Stillwell regu-lator. Potential regulators are usually placed at somepoint convenient to the switchboard, and in some cases theoperating handles are mounted on the board itself and aregeared, by chains and sprocket wheels, to the regulator. 68…
Electrical engineering
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