Patent US3863146A successfully refreshed from Google Patents.
US3863146A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Measuring instrument for the electrical determination of damage to an enamel layer
Assignee: Pfaudler GmbH
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Filing: 1973-11-28
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Granted: 1975-01-28
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Expires: 1993-11-28
Abstract
Abstract Faults in vitreous enamel linings on steel walled vessels such as chemical reactors or piping containing an electrolyte are indicated by an electrical system including a glass or platinum electrode in contact with the electrolyte and connected to the vessel wall through a voltmeter. An auxiliary platinum electrode also contacts the electrolyte and is connected to the voltmeter in parallel with the vessel wall. The auxiliary electrode reduces the effect of background or interference voltage and thereby improves the sensitivity of the system.
Inventors
- 👤 Rudolph Ehret
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:04
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/02; G01N27/04; G01N27/20; G01N27/205
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
64 words
In an electrical system for determining faults in enamel linings of steel walled vessels containing an electrolyte, comprising a glass or platinum electrode in contact with the electrolyte and connected through a voltmeter to the steel wall of the vessel, the improvement comprising a platinum auxiliary electrode in contact with the electrolyte and electrically connected to the voltmeter in parallel with the steel wall.
Claim 2
Dependent Claim
64 words
In an electrical system for determining faults in enamel linings of steel walled vessels containing an electrolyte, comprising a glass or platinum electrode in contact with the electrolyte and connected through a voltmeter to the steel wall of the vessel, the improvement comprising a platinum auxiliary electrode in contact with the electrolyte and electrically connected to the voltmeter in parallel with the steel wall.
Claim 3
Dependent Claim
25 words
An electrical system according to claim 1 wherein the auxiliary platinum electrode is connected to the voltmeter and the steel wall through a variable resistance.
Claim 4
Dependent Claim
24 words
An electrical system according to claim 1 wherein the platinum auxiliary electrode is connected to the voltmeter and the steel wall through a switch.
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) | 1978-01-27 | 1978-07-29 | 1979-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-27 | 1982-07-29 | 1983-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-27 | 1986-07-29 | 1987-01-28 | $7700.00 | Window Closed / Lapsed |