US3083121A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shunt control to prevent arcing in an electrostatic spray coating system and method
Assignee: Ransburg Corp
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Filing: 1959-09-10
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Granted: 1963-03-26
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Expires: 1979-09-10
Abstract
No abstract record available.
Inventors
- 👤 William D Gauthier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:03
CPC Classifications
B; B05; B05B; B05B5/00; B05B5/08; B05B5/10; Y; Y10; Y10S; Y10S101/00; Y10S101/37; Y10S323/00; Y10S323/903
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
171 words
IN THE METHOD OF ELECTROSTATICALLY SPRAY COATING ARTICLES IN AN ELECTROSTATIC FIELD CREATED BY A UNIDIRECTIONAL HIGH POTENTIAL BETWEEN A CHARGING ELECTRODE AND ANOTHER ELECTRODE COMPRISING AT LEAST ONE OF THE ARTICLES AND WHEREIN RELATIVE MOVEMENT BETWEEN THE ELECTRODES RESULTS IN APPRECIABLE VARIATION IN THE GAP SPACING THEREBETWEEN DURING NORMAL COATING OPERATION, AND WHEREIN ELECTROSTATICALLY CHARGED COATING MATERIAL PARTICLES IN THE FIELD ARE ELECTROSTATICALLY DEPOSITED ON THE ARTICLE, THE STEP OF PROVIDING A HIGH RESISTANCE IN SERIES WITH SAID CHARGING ELECTRODE, AND A TUBE CONNECTED TO SAID RESISTANCE AND HAVING ITS CATHODE-GRID CONTROL VOLTAGE CHANGED BY AND AS A FUNCTION OF CHANGES IN SPACE CURRENT ACROSS SAID GAP TO CAUSE AMPLIFIED VARIATIONS IN VOLTAGE DROP ACROSS SAID RESISTANCE RESULTING IN MINIMIZATION IN THE VARIATIONS IN THE AVERAGE FIELD GRADIENT WHICH WOULD OTHERWISE ACCOMPANY SUCH CHANGES IN SPACING, WHILE MAINTAINING THE ENERGY LEVEL OF A DISCHARGE FROM THE CHARGING ELECTRODE BELOW THAT WHICH WOULD BE PROVIDED BY A METAL SPHERE OF A RADIUS OF ABOUT THREE CENTIMETERS IN THE SAME ELECTROSTATIC SYSTEM.
Claim 2
Dependent Claim
171 words
IN THE METHOD OF ELECTROSTATICALLY SPRAY COATING ARTICLES IN AN ELECTROSTATIC FIELD CREATED BY A UNIDIRECTIONAL HIGH POTENTIAL BETWEEN A CHARGING ELECTRODE AND ANOTHER ELECTRODE COMPRISING AT LEAST ONE OF THE ARTICLES AND WHEREIN RELATIVE MOVEMENT BETWEEN THE ELECTRODES RESULTS IN APPRECIABLE VARIATION IN THE GAP SPACING THEREBETWEEN DURING NORMAL COATING OPERATION, AND WHEREIN ELECTROSTATICALLY CHARGED COATING MATERIAL PARTICLES IN THE FIELD ARE ELECTROSTATICALLY DEPOSITED ON THE ARTICLE, THE STEP OF PROVIDING A HIGH RESISTANCE IN SERIES WITH SAID CHARGING ELECTRODE, AND A TUBE CONNECTED TO SAID RESISTANCE AND HAVING ITS CATHODE-GRID CONTROL VOLTAGE CHANGED BY AND AS A FUNCTION OF CHANGES IN SPACE CURRENT ACROSS SAID GAP TO CAUSE AMPLIFIED VARIATIONS IN VOLTAGE DROP ACROSS SAID RESISTANCE RESULTING IN MINIMIZATION IN THE VARIATIONS IN THE AVERAGE FIELD GRADIENT WHICH WOULD OTHERWISE ACCOMPANY SUCH CHANGES IN SPACING, WHILE MAINTAINING THE ENERGY LEVEL OF A DISCHARGE FROM THE CHARGING ELECTRODE BELOW THAT WHICH WOULD BE PROVIDED BY A METAL SPHERE OF A RADIUS OF ABOUT THREE CENTIMETERS IN THE SAME ELECTROSTATIC SYSTEM.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-03-25 | 1966-09-24 | 1967-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-03-25 | 1970-09-24 | 1971-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-03-25 | 1974-09-24 | 1975-03-26 | $7700.00 | Window Closed / Lapsed |