US3719899A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilized, optimizable, gaseous electrical discharge
Assignee: Individual
•
Filing: 1971-11-04
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Granted: 1973-03-06
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Expires: 1991-11-04
Abstract
Abstract A direct current (DC), transverse discharge, gaseous, slotted hollow cathode laser having an electrically indirectly heated oxidized tungsten, or molybdenum cathode, heated to thermionic emission in the presence of cesium vapor adsorbes cesium atoms and over a defined temperature range thermionic emission occurs in inverse proportion to the temperature of the cathode stabilizing the emission, precluding the formation of ''''hot spots,'''' and the relative low cathode fall voltage is varied providing an optimized amount of energy to the electrons as they are accelerated through the cathode fall voltage.
Inventors
- 👤 O Breaux
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:27
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/10; H01S3/13; H01S3/131; H01S3/134; H01S3/02; H01S3/03; H01S3/036; H01S3/038
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
74 words
The improvement in a DC, transverse discharge, gaseous, slotted hollow cathode laser, comprising: a. a reservoir communicating with the interior of the said laser; b. elemental cesium positioned in the said reservoir; c. the said slotted hollow cathode fabricated from a cesium adsorbing thermionically emitting material; d. means for thermionically positioning the said cathode within a determined temperature range to provide an emission current density inversely related to the temperature of the said cathode.
Claim 2
Dependent Claim
74 words
The improvement in a DC, transverse discharge, gaseous, slotted hollow cathode laser, comprising: a. a reservoir communicating with the interior of the said laser; b. elemental cesium positioned in the said reservoir; c. the said slotted hollow cathode fabricated from a cesium adsorbing thermionically emitting material; d. means for thermionically positioning the said cathode within a determined temperature range to provide an emission current density inversely related to the temperature of the said cathode.
Claim 3
Dependent Claim
63 words
The improvement in a DC, transverse discharge, gaseous, laser comprising: a. a cesium adsorbing thermionic cathode positioned within the said laser; b. a source of cesium vapor within the said laser; and c. means for maintaining the said thermionic cathode at a predetermined temperature to provide thermionic emission current from the said cathode that is inversely related to the temperature of the cathode.
Claim 4
Dependent Claim
63 words
The improvement in a DC, transverse discharge, gaseous, laser comprising: a. a cesium adsorbing thermionic cathode positioned within the said laser; b. a source of cesium vapor within the said laser; and c. means for maintaining the said thermionic cathode at a predetermined temperature to provide thermionic emission current from the said cathode that is inversely related to the temperature of the cathode.
Claim 5
Dependent Claim
17 words
The improvement as claimed in claim 2 wherein the said thermionic cathode is fabricated from oxidized tungsten.
Claim 6
Dependent Claim
16 words
The improvement as claimed in claim 2 wherein the said thermionic cathode is fabricated from molybdenum.
Claim 7
Dependent Claim
74 words
The improvement in an argon ion, DC, transverse discharge, gaseous laser having a lasing medium between a cathode and an anode, the said improvement comprising: a. the said cathode fabricated from molybdenum for providing thermionic emission; b. a source of cesium within the said laser; and c. means for thermally positioning the said cathode to a temperature such that the thermionic emission from the cathode is inversely related to the temperature of the cathode.
Claim 8
Dependent Claim
74 words
The improvement in an argon ion, DC, transverse discharge, gaseous laser having a lasing medium between a cathode and an anode, the said improvement comprising: a. the said cathode fabricated from molybdenum for providing thermionic emission; b. a source of cesium within the said laser; and c. means for thermally positioning the said cathode to a temperature such that the thermionic emission from the cathode is inversely related to the temperature of the cathode.
References Cited (Backward Citations)
US2341920A
Cited
US2615140A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-03-05 | 1976-09-04 | 1977-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-05 | 1980-09-04 | 1981-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-05 | 1984-09-04 | 1985-03-06 | $7700.00 | Window Closed / Lapsed |