Electrostatic spray gun voltage and current monitor
US5063350A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 9, 1990 |
| Grant date | Nov 5, 1991 |
| Priority date | — |
| Expiry date | Feb 9, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R15/14
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A device and method of determining the voltage and current existing at the electrostatic electrode in a electrostatic spray gun, the spray gun containing a self-contained power supply including a turbine generator operating the air supplied to the gun, the power supply producing a low voltage d.c., and a voltage multiplier changing the voltage to a high potential which is applied to the electrode of the spray gun, a sensing and measuring circuit for determining the return current or ground current from the electrode to the power supply and producing a voltage directly related to the ground current and producing a voltage signal which may be measured directly to indicate the ground current; a circuit establishing a base voltage from the power supply for comparison against the ground current voltage signal and obtaining a differential voltage which may be measured and which is directly proportional to the electrode voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.