Miller, Kempster Blanchard, 1870-1933 · New York : McGraw publishing company · leaf 589
mes necessary to regulatethe output of charging machines is, as has been stated, very wide.It is desirable to be able to reduce the voltage from that necessaryto charge the whole battery to that necessary to charge a single cell.The field rheostats of ordinary commercial practice in other lines… … FIG. 410.—POWER TABLE—BRICK AND SLATE BASE. great enough nicety. The remedy for this is more contacts on therheostat and therefore more steps. Frequently, however, a sufficientnumber of contacts for the desired result cannot be placed on therheostat face without making it of prohibitory size. The…
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