| 摘要 |
A portable bar-to-bar armature tester for testing motor armatures for adequacy of their coil windings is disclosed. The tester is to be held by hand, such that four electrical probes, which extend out of the forward end of the tester, contact with four adjacent commutator bars of the armature to be tested. The tester includes a voltmeter in circuit with two of the four probes, and a toggle switch, a rheostat and a D.C. source in circuit with the two other of the four probes. The circuitry is all housed in a hard plastic casing to protect the circuitry from electrical contact with other objects and to protect the circuitry from damage due to dropping or dirt accumulation. The four electrical probes are laterally adjustable and are contacted with four adjacent commutator bars to determine whether the coil windings, are unbroken and properly wound.
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