Miller, Kempster Blanchard, 1870-1933 · New York : McGraw publishing company · leaf 876
head band, as it will save thetester a very tired arm at the end of a long test. As a matter of fact,the receiver is little appreciated as a testing instrument. A veryconvenient set is formed by a watch-case rteceiver and head band,and two small-sized cells of dry battery, strapped together so asto… … FIG. 625.—CONTINUITY TEST. convenient clips, or contact points adapted to make contact with thewires to be tested. This arrangement leaves both hands free at alltimes, and is wonderfully sensitive. The continuity test, or test for broken wires, may be made withthe same simple instruments. The wires…
Telephone
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