US3835328A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ionization system for sensing and measuring gaseous impurities
Assignee: United States Department of the Air Force
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Filing: 1972-05-12
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Granted: 1974-09-10
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Expires: 1992-05-12
Abstract
Abstract An ionization detector in which a vapor sample flows past a source of ionizing radiation of beta particles and through a recombination region which forces the sample to pass through a tortuous path created by a series of parallel adjacent and spaced insulated washers mounted about a shaft with the washers having different selected openings. The sample first passes through a metallic manifold also having openings and then through the washers followed by the ion collection region which includes a screen of electrically conducting material. A DC voltage source connects the manifold and the screen with an ammeter in series therewith for readout.
Inventors
- 👤 W Harris
- 👤 B Schluter
- 👤 E Tromborg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 03:52
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/62; G01N27/64; G01N27/66; H; H01; H01J; H01J41/00; H01J41/02; H01J41/08
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
175 words
An ionization detector comprising: a. a housing having an input and output for passage of vapor samples; b. a source of ionizing radiation mounted within the housing in proximity to the input; c. an electrically conducting manifold mounted with the housing and having a plurality of openings and in the path of impinging radiation from the ionizing radiation source; d. means for ion recombination including a series of adjacent and parallel baffles mounted within the housing in proximity to the manifold, the baffles being of electrically insulated material and spaced from each other with each of the baffles having a plurality of openings for passage of vapor samples; e. a collector washer of electrically conductive material adjacent to and parallel with the recombination means; f. an electrode screen at the output adjacent to and parallel to the collector washer and spaced therefrom; g. means for electrically biasing the detector including a DC voltage source connected to the manifold and screen; and h. an ammeter in series connection with the screen and the DC voltage source.
Claim 2
Dependent Claim
175 words
An ionization detector comprising: a. a housing having an input and output for passage of vapor samples; b. a source of ionizing radiation mounted within the housing in proximity to the input; c. an electrically conducting manifold mounted with the housing and having a plurality of openings and in the path of impinging radiation from the ionizing radiation source; d. means for ion recombination including a series of adjacent and parallel baffles mounted within the housing in proximity to the manifold, the baffles being of electrically insulated material and spaced from each other with each of the baffles having a plurality of openings for passage of vapor samples; e. a collector washer of electrically conductive material adjacent to and parallel with the recombination means; f. an electrode screen at the output adjacent to and parallel to the collector washer and spaced therefrom; g. means for electrically biasing the detector including a DC voltage source connected to the manifold and screen; and h. an ammeter in series connection with the screen and the DC voltage source.
Claim 3
Dependent Claim
15 words
An ion vapor detector according to claim 1 wherein the ionization radiation is beta radiation.
Claim 4
Dependent Claim
21 words
An ionization vapor detector according to claim 2 wherein the recombination baffles are Teflon and the collector washer is stainless steel.
References Cited (Backward Citations)
US3174035A
Cited
US3566107A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-09 | 1978-03-11 | 1978-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-09 | 1982-03-11 | 1982-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-09 | 1986-03-11 | 1986-09-10 | $7700.00 | Window Closed / Lapsed |