US3787307A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sensing element to sense ions in liquids
Assignee: Pfaudler GmbH
•
Filing: 1971-10-13
•
Granted: 1974-01-22
•
Expires: 1991-10-13
Abstract
Abstract A mechanically stable, solid, rod-like metallic carrier body has a base enamel layer fused thereover, on a portion of which a glass electrode is fused as a top cover; a top enamel layer is fused to the remainder of the base enamel layer, the base enamel layer can be of sufficient conductivity so that an electric potential can be sensed from the metallic body, or an electrical conductor, in contact with the glass, which can be fused between the enamel layers. A plurality of glass electrodes, of different response to ions can be placed on the same enameled metal carrier and separately connected to sensing apparatus.
Inventors
- 👤 A Schwab
- 👤 R Ehret
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:56
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/28; G01N27/30; G01N27/36
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
41 words
Element according to claim 1, wherein the base enamel layer (2) is essentially electrically insulating; and said electrical conductive means comprises an electrical conductor (5, 6) melted into the enamel layers (2, 3) and in contact with the glass electrode (4).
Claim 2
Dependent Claim
18 words
Element according to claim 2, wherein said metallic carrier body is electrically grounded to form an electrical shield.
Claim 3
Dependent Claim
24 words
Element according to claim 1, wherein a plurality of glass electrodes (4) are fused to the base enamel layer (2) insulated from each other.
Claim 4
Dependent Claim
35 words
Element according to claim 4, wherein said electrical conductive means comprises a plurality of electrical conductors (5, 6) melted into the enamel layers, one conductor each being in electrical contact with a glass electrode (4).
Claim 5
Dependent Claim
36 words
Element according to claim 4, wherein the base enamel layer (2) is essentially electrically insulating; and the electrically conductive means (5, 6) are in contact with the electrodes and accessible from outside of the sensing element.
Claim 6
Dependent Claim
67 words
Element according to claim 4, including means forming a chamber (9a) having a diaphragm (11) at least in part defining a limit of the chamber, the diaphragm (11) separating the inside of the chamber (9a) from the liquid (10), the ions of which are to be sensed; a reference liquid (9) in the chamber; and one of the electrodes (4) being in contact with the reference liquid.
Claim 7
Dependent Claim
49 words
Element according to claim 1, wherein the enamel glass of the electrode (4) comprises SiO2 - 60 - 75 Mol percent; Na2O - 15 - 25 Mol percent; CaO - 5 - 15 Mol percent; Li2O - 0 - 5 Mol percent; ZnO - 0 - 2 Mol percent.
Claim 8
Dependent Claim
49 words
Element according to claim 1, wherein the enamel glass of the electrode (4) comprises SiO2 - 60 - 75 Mol percent; Na2O - 10 - 25 Mol percent; CaO - 0 - 3 Mol percent; B2O3 - 0 - 15 Mol percent; A12O3 - 0 - 12 Mol percent.
Claim 9
Dependent Claim
35 words
Element according to claim 1, wherein the base enamel layer (2) is non-insulating at least in the region beneath the glass electrode (4); and means connecting the metallic carrier body (1) into an electrical circuit.
Claim 10
Dependent Claim
26 words
Element according to claim 10, wherein the base enamel layer comprises an additive of 30 - 50 percent (by weight) of powdered silver or noble metal.
Claim 11
Dependent Claim
12 words
Element according to claim 1, wherein the carrier body (1) comprises steel.
Claim 12
Dependent Claim
28 words
Element according to claim 1, wherein the base enamel layer (2) is essentially electrically insulating; and said metallic carrier body is electrically grounded to form an electrical shield.
References Cited (Backward Citations)
US2117596A
Cited
GB492936A
Cited
GB495303A
Cited
GB509555A
Cited
US2462843A
Cited
US3306837A
Cited
US3498901A
Cited
US3357909A
Cited
US3458422A
Cited
US3649506A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-21 | 1977-07-23 | 1978-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-21 | 1981-07-23 | 1982-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-21 | 1985-07-23 | 1986-01-22 | $7700.00 | Window Closed / Lapsed |