US4287487A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas laser generating device of the longitudinal gas flow type
Assignee: Hitachi Ltd
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Filing: 1979-06-26
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Granted: 1981-09-01
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Expires: 1999-06-26
Abstract
Abstract A gas laser generating device of the longitudinal gas flow type having at least two glow discharge tubes, each of which has positive and negative electrodes, electric insulating tubes which are inserted between the two glow discharge tubes in order to provide insulation therebetween, and mirrors which are positioned at the ends of the two glow discharge tubes. In the glow discharge tubes, gas is excited to generate gas lasing and this gas lasing is amplified by the reflections of the mirros. Also, there are further provided triggering electrodes near either the negative or positive electrodes of the glow discharge tubes, respectively, which triggering electrodes are connected to the positive electrodes through triggering resistors, respectively.
Inventors
- 👤 Kouji Kuwabara
- 👤 Hiroyuki Sugawara
- 👤 Toshiharu Shirakura
- 👤 Kouji Sasaki
- 👤 Satoshi Takemori
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:48
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/02; H01S3/03; H01S3/036; H01S3/09; H01S3/097; H01S3/0977
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
200 words
A gas laser generating device of the longitudinal gas flow type having at least two glow discharge tubes, each of which has positive and negative electrodes and two ends wherein said discharge tubes are located so that an end of one of said discharge tubes is adjacent an end of said other discharge tube, at least one electric insulating tube which is inserted between said adjacent ends of the two glow discharge tubes in order to insulate therebetween, mirrors which are positioned at at least one end of each glow discharge tube to form a resonant cavity, means for circulating a gas capable of lasing through said discharge tubes, and means for extracting laser energy from said device, wherein the flow of gas is excited to generate gas lasing which is amplified by reflection by said mirrors, and characterized in that there are further provided triggering electrodes located in close proximity with either the positive or the negative electrodes of each of said two glow discharge tubes, respectively, which triggering electrodes are connected to the other of said positive or negative electrodes of said two glow discharge tubes which they are not in close proximity with through triggering resistors, respectively.
Claim 2
Dependent Claim
200 words
A gas laser generating device of the longitudinal gas flow type having at least two glow discharge tubes, each of which has positive and negative electrodes and two ends wherein said discharge tubes are located so that an end of one of said discharge tubes is adjacent an end of said other discharge tube, at least one electric insulating tube which is inserted between said adjacent ends of the two glow discharge tubes in order to insulate therebetween, mirrors which are positioned at at least one end of each glow discharge tube to form a resonant cavity, means for circulating a gas capable of lasing through said discharge tubes, and means for extracting laser energy from said device, wherein the flow of gas is excited to generate gas lasing which is amplified by reflection by said mirrors, and characterized in that there are further provided triggering electrodes located in close proximity with either the positive or the negative electrodes of each of said two glow discharge tubes, respectively, which triggering electrodes are connected to the other of said positive or negative electrodes of said two glow discharge tubes which they are not in close proximity with through triggering resistors, respectively.
Claim 3
Dependent Claim
62 words
A gas laser generating device of the longitudinal gas flow type according to claim 1, wherein the gas within said glow discharge tube flows in a direction from a negative electrode to a positive electrode in each of said discharge tubes, and said triggering electrode in each discharge tube is located downstream of the gas flow with respect to said negative electrode.
Claim 4
Dependent Claim
27 words
A gas laser generating device of the longitudinal gas flow type according to claim 1, wherein two electric insulating tubes are provided between the glow discharge tubes.
Claim 5
Dependent Claim
27 words
A gas laser generating device of the longitudinal gas flow type according to claim 1, wherein said two glow discharge tubes are aligned on a common axis.
Claim 6
Dependent Claim
68 words
A gas laser generating device of the longitudinal gas flow type according to claim 4, wherein there is further provided a metal tube coupled to both ends of each glow discharge tube, which metal tube includes a blower for circulating the gas within said glow discharge tubes, and wherein electric insulating tubes are provided at both ends of each of said glow discharge tubes for electrically insulating therebetween.
Claim 7
Dependent Claim
39 words
A device according to claim 1, wherein the electrodes which are in close proximity with the triggering electrodes are located nearer to the insulating tube than the other electrodes which are not in close proximity with the triggering electrodes.
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) | 1984-08-31 | 1985-03-02 | 1985-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-08-31 | 1989-03-02 | 1989-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-08-31 | 1993-03-02 | 1993-09-01 | $7700.00 | Window Closed / Lapsed |