| 摘要 |
A number of different embodiments of jumper cables that are constructed to prevent sparking at the batteries where the cables are connected and disconnected. Each embodiment includes a switch means located at the middle of the cables along their length, spaced from the batteries, and in the form of either a hermetically sealed snap switch or a jack and plug arrangement. The switch means may also comprise a timer switch that automatically opens after a predetermined time period of connection. One feature of this invention incorporates jumper cable clamps that operate a cable connected to a power switch so that upon attachment or removal of the cable clamps, the power switch is opened to alleviate spark problems. A further arrangement allows current flow through the battery jumper cables only after all clamp switches are closed and there is a proper polarity matchup between the batteries.
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