Miller, Kempster Blanchard, 1870-1933 · New York : McGraw publishing company · leaf 315
of the figure, the signal in themiddle being displayed while the other two are not. CHAPTER XVIII. COMMON BATTERY SWITCH-BOARDS FOR SMALL EXCHANGES. In the two preceding chapters are given the elements of circuitarrangement, and of apparatus by which voice transmission and thetransmission of… … FIG. 24S.-TYPICAL CIRCUITS FOR SMALL COMMON-BATTERY BOARD. switch-board, suitable for small exchanges, may easily be determined.In this chapter a few of the combinations of Hne and cord circuits,with their necessary details, will be considered; this subject-matterleading naturally to the discussion…
Telephone
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