US3718430A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flame ionization detector
Assignee: Battelle Entwicklungs GmbH
•
Filing: 1971-01-19
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Granted: 1973-02-27
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Expires: 1991-01-19
Abstract
Abstract A housing has an air inlet port and an outlet port. Opposed burner jet assemblies provide flames from electrically conductive jets mounted on insulators. Hydrogen for combustion is supplied through pipes together with a test material and a reagent. A voltage source, amplifier, and meter are connected to detect variations in electrical conductivity of the flames between the jets and thus to detect certain ingredients in the test material.
Inventors
- 👤 H Fischer
- 👤 M Neufelder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:59
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/62; G01N27/626; F; F23; F23N; F23N5/00; F23N5/02; F23N5/12; F23N5/126; G01N30/00; G01N30/02; G01N30/62; G01N30/64; G01N30/68; Y; Y10; Y10T; Y10T436/00; Y10T436/16
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
27 words
A detector as in claim 1, wherein the jets are arranged such that, when the burners are alight, the flames can touch or almost touch each other.
Claim 2
Dependent Claim
19 words
A detector as in claim 2, comprising also means for conveying a test material to at least one flame.
Claim 3
Dependent Claim
18 words
A detector as in claim 3, comprising also means for conveying a reagent to at least one flame.
Claim 4
Dependent Claim
26 words
A detector as in claim 2, wherein a combustion material is conveyed to each burner and a test material is conveyed to at least one flame.
Claim 5
Dependent Claim
22 words
A detector as in claim 5, wherein the combustion material comprises hydrogen and the test material comprises carbon or a compound thereof.
Claim 6
Dependent Claim
16 words
A detector as in claim 5, wherein a reagent is conveyed to at least one flame.
Claim 7
Dependent Claim
26 words
A detector as in claim 7, wherein the combustion material comprises hydrogen, the test material comprises phosphorus, and the reagent comprises cesium bromide or potassium hydroxide.
Claim 8
Dependent Claim
45 words
A detector as in claim 1, wherein each burner includes a combustion gas supply pipe and at least one burner has a further pipe, in communication with the combustion gas supply pipe, through which a material under test can be conveyed to the burner jet.
Claim 9
Dependent Claim
24 words
A detector as in claim 1, wherein the jets are mounted within a housing having a gas inlet port and a gas outlet port.
Claim 10
Dependent Claim
37 words
A detector as in claim 1, wherein the means for detecting variations in conductivity comprises a voltage source, an amplifier, and an indicating instrument connected in circuit with the insulated jet and at least one other jet.
References Cited (Backward Citations)
US3027241A
Cited
US3372000A
Cited
US3399974A
Cited
US3425806A
Cited
US3510261A
Cited
US3542516A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-27 | 1976-08-28 | 1977-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-27 | 1980-08-28 | 1981-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-27 | 1984-08-28 | 1985-02-27 | $7700.00 | Window Closed / Lapsed |