Polarity matching apparatus for jumper cables

Electricity: battery or capacitor charging or discharging – Serially connected batteries or cells – With discharge of cells or batteries

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307 10BP, 339 29B, H02J 700

Patent

active

043497748

ABSTRACT:
Apparatus for use with jumper cables, such as in jump starting an engine, which permits attachment of the cables to the terminals of a supply and a battery without regard to the polarities of the terminals, and thereafter aids the user in matching the polarities of the battery and supply. Two terminal blocks, secured to the jumber cables, have at least two spaced contacts apiece and are movable relative to one another between two alternative contact mating positions. The mating positions correspond to the two possible ways in which the battery and supply terminals can be interconnected, either positive-to-positive, negative-to-negative, or positive-to-negative, negative-to-positive. The blocks are biased to a third position in which the battery and supply are not interconnected and in which control circuitry determines which of the two alternative contact mating positions would interconnect the supply and battery with their polarities matched. Movement is prevented to that contact mating position which would re sult in mismatch of the polarities; on movement to the position for which the polarities are matched, the blocks are locked together.

REFERENCES:
patent: 3051887 (1962-08-01), Lind
patent: 3281816 (1966-07-01), Raymond
patent: 3308365 (1967-03-01), St. John
patent: 4166241 (1979-08-01), Grant

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