Miller, Kempster Blanchard, 1870-1933 · New York : McGraw publishing company · leaf 219
FIG. ISO.—WESTERN COMBINED DROP AND JACK. must insert her plug; while in the forms where the jacks and thedrops are entirely removed from each other the operator must firstlook at the drop, ascertain its number, and then look for the corre-sponding number of jack on the board below. This very… … FIG. 181.—WESTERN COIIEINED DROP AND JACK. successful commercial operation was that of the Western TelephoneConstruction Company. It is shown in Figs. i8o and i8i, the formerfio-ure showing the shutter in its normal position, and the latter, afterit has been thrown down by an incoming call current.…
Telephone
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