Apparatus and method for controlling an electrostatically induced liquid spray
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United States of America Patent
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Jul 27, 2010
Grant Date -
Aug 28, 2008
app pub date -
Feb 26, 2008
filing date -
Jan 18, 2005
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method for controlling an electrostatically induced liquid spray includes the steps of: (1) generating a liquid spray from a liquid sample with an electrostatic spray nozzle device using an applied electric field, wherein at least a nozzle portion of the spray device is formed of an insulating material; (2) sensing a current of the liquid spray with a spray current sensing means placed in relation to the spray device; (3) comparing the sensed current of the liquid spray with a pre-selected current value, with a difference between the two representing a control signal; and (4) varying the applied electric field using a computer-controlled positioning mechanism that moves the spray device relative to an inlet of the object that receives the liquid spray and acts as a counter-electrode.
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