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Patent US3970920A successfully refreshed from Google Patents.
US3970920A
Expired / Lapsed
US
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Measuring arrangement for an apparatus for electrostatic coating of grounded objects for measuring the ground resistence
Assignee: Gema Switzerland GmbH
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Filing: 1975-03-24
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Granted: 1976-07-20
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Expires: 1995-03-24
Abstract
Abstract A measuring arrangement for an apparatus for electrostatic coating of grounded objects for measuring the ground or earthing resistance thereof, and wherein the objects are moved past the apparatus. An electrode is arranged in front of the apparatus, viewed in the object conveying direction, and this electrode is intended to influence the electrical potential of the object without contacting the same. There is also provided a measuring circuit which is electrically coupled with such electrode or with an electrostatic or induction electrode also arranged in front of the apparatus.
Inventors
- 👤 Franz Braun
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 02:32
CPC Classifications
B; B05; B05B; B05B5/00; B05B5/08; B05B5/10; B05B5/087; G; G01; G01R; G01R27/00; G01R27/02; G01R27/20
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
102 words
Means for measuring the ground resistance of successive grounded objects which are to be electrostatically coated in a coating apparatus, said coating apparatus including conveying means for moving said objects over a defined conveying path, influencing means proximate to said path for continuously influencing the electrical potential of said objects without contacting the same, and a power source for energizing said influencing means, said measuring means comprising monitoring means for delivering and early warning signal in response to a gradual increase in ground resistance of the objects before the potential of the objects has reached a predetermined value below the breakdown value.
Claim 2
Dependent Claim
102 words
Means for measuring the ground resistance of successive grounded objects which are to be electrostatically coated in a coating apparatus, said coating apparatus including conveying means for moving said objects over a defined conveying path, influencing means proximate to said path for continuously influencing the electrical potential of said objects without contacting the same, and a power source for energizing said influencing means, said measuring means comprising monitoring means for delivering and early warning signal in response to a gradual increase in ground resistance of the objects before the potential of the objects has reached a predetermined value below the breakdown value.
Claim 3
Dependent Claim
18 words
Apparatus for measuring as claimed in claim 1, wherein said influencing means consists of a corona discharge electrode.
Claim 4
Dependent Claim
64 words
Apparatus for measuring as claimed in claim 1, wherein said monitoring means includes a voltage divider having a tap for connecting to ground, a trigger circuit, means for coupling said tap of the voltage divider with said trigger circuit, and means connected to said trigger circuit for generating a disturbance signal in response to appearance of a voltage in excess of a predetermined value.
Claim 5
Dependent Claim
48 words
Apparatus for measuring as claimed in claim 1, wherein said influencing means and said monitoring means are disposed on the same side of said conveying path, and wherein the spacing between both of said means is greater than the spacing between either of said means and said object.
Claim 6
Dependent Claim
41 words
Apparatus for measuring as claimed in claim 1, wherein said influencing means and said monitoring means are disposed on opposite sides of said conveying path and at the same height, said monitoring means being in the form of a plate electrode.
Claim 7
Dependent Claim
31 words
Apparatus for measuring as claimed in claim 1, wherein said monitoring means comprises a current measuring device adapted to measure the discharge current delivered by said influencing means to an object.
Claim 8
Dependent Claim
28 words
Apparatus for measuring as claimed in claim 1, wherein said influencing means and said monitoring means are disposed in a predetermined sequence with respect to said conveying path.
Claim 9
Dependent Claim
37 words
Apparatus for measuring as claimed in claim 1, wherein said monitoring means is connected with said influencing means, and wherein said influencing means in a component of an electrical field intensity-measuring device which encompasses the monitoring means.
Claim 10
Dependent Claim
21 words
Apparatus for measuring as claimed in claim 8, wherein said electrical field intensity-measuring device consists of an induction-field intensity measuring device.
Claim 11
Dependent Claim
24 words
Apparatus for measuring as claimed in claim 8, wherein said electrical field intensity-measuring device consists of an open ionization chamber containing a radioactive source.
References Cited (Backward Citations)
DE2045678A1
Cited
US3787707A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-07-20 | 1980-01-19 | 1980-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-07-20 | 1984-01-19 | 1984-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-07-20 | 1988-01-19 | 1988-07-20 | $7700.00 | Window Closed / Lapsed |