Patent US3826980A successfully refreshed from Google Patents.
US3826980A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Enameled electrical sensing probe
Assignee: Pfaudler GmbH
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Filing: 1969-12-04
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Granted: 1974-07-30
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Expires: 1989-12-04
Abstract
Abstract A transducer assembly, to measure dielectric and similar electrical properties of materials is constructed in the form of a tubular electrode of enameled steel, closed off at the bottom with a second, button electrode set into the bottom closure, insulated from the tubular electrode by the enamel, and further covered by a unitary enamel layer to resist high temperature, corrosion and the like; and electronic measuring components including an RF generator circuit, tuned circuits and the like coupled to the electrodes and located within the tubular electrode.
Inventors
- 👤 H Deichelmann
- 👤 H Veit
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:10
CPC Classifications
G; G01; G01R; G01R27/00; G01R27/02; G01R27/26; G01R27/2617; G01R27/2635; G01R27/2676; G01N; G01N27/00; G01N27/02; G01N27/04
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
83 words
A probe adapted for immersion in a material for sensing the electrical properties of said material comprising, in combination, at least two metallic electrode elements, said electrode elements being electrically insulated from each other by a layer of enamel interposed therebetween and fused thereto, the exposed surface of said electrode elements and the exposed portion of said enamelled layer being covered by a continuous unbroken layer of enamel, whereby said unit presents a continuous seamless corrosion resistant enamel surface to the surrounding material.
Claim 2
Dependent Claim
83 words
A probe adapted for immersion in a material for sensing the electrical properties of said material comprising, in combination, at least two metallic electrode elements, said electrode elements being electrically insulated from each other by a layer of enamel interposed therebetween and fused thereto, the exposed surface of said electrode elements and the exposed portion of said enamelled layer being covered by a continuous unbroken layer of enamel, whereby said unit presents a continuous seamless corrosion resistant enamel surface to the surrounding material.
Claim 3
Dependent Claim
52 words
A probe adapted to sense the electrical properties of surrounding material comprising a first metallic body, a second metallic body separated from said first body, an enamel insulator interposed between said bodies, an enamel layer covering the exposed surface of both of said bodies and the exposed portion of said insulator layer.
Claim 4
Dependent Claim
52 words
A probe adapted to sense the electrical properties of surrounding material comprising a first metallic body, a second metallic body separated from said first body, an enamel insulator interposed between said bodies, an enamel layer covering the exposed surface of both of said bodies and the exposed portion of said insulator layer.
Claim 5
Dependent Claim
29 words
An electrode unit as claimed in claim 1 wherein said first electrode is tubular in shape, and said second electrode is set into one end of said tubular electrode.
Claim 6
Dependent Claim
104 words
A measuring and sensing unit assembly comprising a hollow tubular electrode, a second electrode set in one end of said tubular electrode, a first layer of enamel interposed between said electrodes and fused thereto, a second layer of enamel fused to the exposed surfaces of said electrodes and to the exposed portion of said first layer of enamel, and electrical measuring componenTs located within said tubular electrode, said electrical measuring components being electrically coupled to both the tubular electrode and the second electrode, whereby said electrical components measure the characteristics of material in contact with the exterior of said measuring and sensing unit assembly.
Claim 7
Dependent Claim
104 words
A measuring and sensing unit assembly comprising a hollow tubular electrode, a second electrode set in one end of said tubular electrode, a first layer of enamel interposed between said electrodes and fused thereto, a second layer of enamel fused to the exposed surfaces of said electrodes and to the exposed portion of said first layer of enamel, and electrical measuring componenTs located within said tubular electrode, said electrical measuring components being electrically coupled to both the tubular electrode and the second electrode, whereby said electrical components measure the characteristics of material in contact with the exterior of said measuring and sensing unit assembly.
Claim 8
Dependent Claim
50 words
A measuring and sensing unit as claimed in claim 4 wherein said electrical measuring components comprise a RF generator circuit coupled to said electrodes, a tank circuit coupled to said electrodes, and a measuring circuit responsive to changes in coupling between said electrodes depending upon the material surrounding said unit.
Claim 9
Dependent Claim
25 words
A measuring and sensing unit as claimed in claim 4 including a cooling coil located within said tubular electrode and surrounding said electronic measuring component.
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) | 1977-07-29 | 1978-01-28 | 1978-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-29 | 1982-01-28 | 1982-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-29 | 1986-01-28 | 1986-07-30 | $7700.00 | Window Closed / Lapsed |