| 摘要 |
A conventional flashlight is adapted for use as a circuit continuity tester. The flashlight has the usual hollow body containing the batteries, a bulb having one contact in communication with the positive battery terminal and the other contact connected, through an on-off switch, to a conducting, exterior portion of the flashlight, and thence to a conducting spring which completes the circuit to the negative battery terminal. The flashlight is modified by providing a passageway through the end cap which threads to the lower end of the body, passing a wire through the passageway, and soldering one end of the wire to a metal washer having a plastic coating on one side and the other end to a metal pocket clip which detachably connects to the body. The washer is placed in contact with the negative battery terminal with the plastic layer insulating the washer from contact with the spring. With the switch in the "on" position, illumination of the bulb indicates circuit continuity between one point, contacted by the pocket clip, and a second point, contacted by the metal exterior of the flashlight.
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