Electrostatic spray device provided with electric-arc protection means
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United States of America Patent
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Apr 12, 1988
Grant Date -
N/A
app pub date -
Oct 1, 1986
filing date -
Oct 2, 1985
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An electronic safety device to prevent electrical arcing in electrostatic sprayer apparatus for spraying material such as paint comprises a device for generating a very low voltage AC signal in a fixed supply and control unit and a voltage step-up device in a mobile sprayer. A device sensitive to variations in the alternating current flowing in the conductors linking the generating device to the step-up device is connected to a disabling device capable, for example, of blocking the generating device when too sudden a current variation is measured, since such a current variation may precede electrical arcing.
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