Electricity: circuit makers and breakers – Liquid contact – Time delay
Patent
1977-11-07
1979-07-31
Ross, Herbert F.
Electricity: circuit makers and breakers
Liquid contact
Time delay
200 5109, 320 47, 339 29B, H01H 1308, H01H 2110
Patent
active
041631340
ABSTRACT:
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.
REFERENCES:
patent: 3062988 (1962-11-01), Medlar
patent: 3120632 (1964-02-01), Hopt et al.
patent: 3259754 (1966-07-01), Matheson
patent: 3267452 (1966-08-01), Wolf
patent: 3281816 (1966-10-01), Raymond
patent: 3343057 (1967-09-01), Smith
patent: 3409816 (1968-11-01), Foster
patent: 3470440 (1969-09-01), Rheingold et al.
patent: 3700999 (1972-10-01), Gourse
Ross Herbert F.
Upaya, Inc.
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