Miller, Kempster Blanchard, 1870-1933 · New York : McGraw publishing company · leaf 736
Dj^ … FIG. 515.—FIRST SELECTOR DURING TIME OF ACTION. as a result of each one the shaft and its wipers are stepped aroundover the horizontal row of trunk line contaats. In view of the fact that the wiper contacts connected with thetrunk lines are multipled to other switches, it is evident that someof the…
Telephone
Internet Archive · Cornell University Library · Public Domain Mark 1.0. Free to use for anything.
