US3732453A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wide angle ultraviolet radiation detector
Assignee: Honeywell Inc
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Filing: 1971-11-24
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Granted: 1973-05-08
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Expires: 1991-11-24
Abstract
Abstract An ultraviolet sensitive gaseous discharge detector has uniform sensitivity over a broad viewing angle. The cathode of the detector has an essentially circular cross-section while the anode has an elongated cross-section. The anode is aligned in a common plane with the cathode with the elongated surfaces of the anode being aligned essentially parallel to the common plane of the electrodes.
Inventors
- 👤 R Johnson
- 👤 B Mcclure
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:11
CPC Classifications
H; H01; H01J; H01J47/00; H01J47/08
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
97 words
An ultraviolet radiation detector comprising: a sealed envelope having a transparent portion, an ionizable gaseous filling contained within the envelope, a cathode of essentially circular cross-section positioned within the envelope, the cathode having an apparatus crosssectional diameter, and an anode of elongated cross-section aligned within the envelope in a common plane with the cathode, the anode having a crosssectional length essentially parallel with the common plane and essentially perpendicular to the cathode and having a crosssectional width essentially perpendicular to the common plane, the cross-sectionaL width being appreciably less than the apparent cross-sectional diameter of the cathode.
Claim 2
Dependent Claim
97 words
An ultraviolet radiation detector comprising: a sealed envelope having a transparent portion, an ionizable gaseous filling contained within the envelope, a cathode of essentially circular cross-section positioned within the envelope, the cathode having an apparatus crosssectional diameter, and an anode of elongated cross-section aligned within the envelope in a common plane with the cathode, the anode having a crosssectional length essentially parallel with the common plane and essentially perpendicular to the cathode and having a crosssectional width essentially perpendicular to the common plane, the cross-sectionaL width being appreciably less than the apparent cross-sectional diameter of the cathode.
Claim 3
Dependent Claim
27 words
The radiation detector of claim 1 wherein the anode has a cross-sectional width which is less than about 30 percent of the cross-sectional diameter of the cathode.
Claim 4
Dependent Claim
22 words
The radiation detector of claim 1 wherein the cathode has a cross-sectional diameter of between about 0.015 inches and about 0.100 inches.
Claim 5
Dependent Claim
23 words
The radiation detector of claim 3 wherein the cathode and the anode are separated by between about 0.004 inches and about 0.012 inches.
Claim 6
Dependent Claim
23 words
The radiation detector of claim 1 wherein the cathode is composed of a metal of the group consisting of molybdenum, nickel, and tungsten.
Claim 7
Dependent Claim
23 words
The radiation detector of claim 1 wherein the anode is composed of a metal of the group consisting of molybdenum, nickel, and tungsten.
Claim 8
Dependent Claim
17 words
The radiation detector of claim 1 wherein the gaseous filling comprises a hydrogen and neon gas mixture.
Claim 9
Dependent Claim
24 words
The radiation detector of claim 7 wherein the hydrogen and neon gas mixture comprises about 7 percent to about 25 percent hydrogen, balance neon.
Claim 10
Dependent Claim
25 words
The radiation detector of claim 7 wherein the hydrogen and neon gas mixture has a pressure of between about 100 torr and about 600 torr.
Claim 11
Dependent Claim
17 words
The radiation detector of claim 1 wherein the gaseous filling comprises a hydrogen and helium gas mixture.
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) | 1976-05-07 | 1976-11-06 | 1977-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-07 | 1980-11-06 | 1981-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-07 | 1984-11-06 | 1985-05-08 | $7700.00 | Window Closed / Lapsed |