US4257015A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ring laser gyroscope anode
Assignee: Kearfott Guidance and Navigation Corp
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Filing: 1979-03-26
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Granted: 1981-03-17
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Expires: 1999-03-26
Abstract
Abstract An anode for a ring laser gyroscope which provides improved current stability in the glow discharge path is disclosed. The anode of this invention permits operation at lower currents thereby allowing a reduction of heat dissipation in the ring laser gyroscope. The anode of one embodiment of this invention is characterized by a thumbtack appearance with a spherical end where the normal sharp end of the thumbtack would be located. The stem of the anode extends from the outside of the gyroscope structure to the interior of the structure such that the spherical end is substantially adjacent to the laser beam.
Inventors
- 👤 Bo H. G. Ljung
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:08
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/02; H01S3/03; H01S3/038; H01S3/0385; G; G01; G01C; G01C19/00; G01C19/58; G01C19/64; G01C19/66; G01C19/661; H01S3/0388; H01S3/0381; H01S3/05; H01S3/08; H01S3/081; H01S3/083; H01S3/0835
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
149 words
An anode, for use in a laser with a body portion having an optical resonant cavity and having a lead-in communication passage connecting said optical resonant cavity with the surrounding atmosphere, comprising: a head portion having a head inner portion and a head outer portion; said head outer portion being arranged to engage said laser body portion for its support and for sealing off the surrounding atmosphere from the resonant cavity; said head inner portion being adapted to connect to a conductor to receive an electric potential; a stem portion disposed in said passage and fixedly connected to said head inner portion for electric contact therewith; and a discharge end portion disposed in said passage proximate to said optical cavity and fixedly connected to said stem portion for electric contact therewith; wherein said head outer portion is a dielectric disc, and said head inner portion extends through said disc.
Claim 2
Dependent Claim
149 words
An anode, for use in a laser with a body portion having an optical resonant cavity and having a lead-in communication passage connecting said optical resonant cavity with the surrounding atmosphere, comprising: a head portion having a head inner portion and a head outer portion; said head outer portion being arranged to engage said laser body portion for its support and for sealing off the surrounding atmosphere from the resonant cavity; said head inner portion being adapted to connect to a conductor to receive an electric potential; a stem portion disposed in said passage and fixedly connected to said head inner portion for electric contact therewith; and a discharge end portion disposed in said passage proximate to said optical cavity and fixedly connected to said stem portion for electric contact therewith; wherein said head outer portion is a dielectric disc, and said head inner portion extends through said disc.
Claim 3
Dependent Claim
33 words
The anode of claim 1 wherein said head outer portion is made from Sapphire and said head inner portion is made from a material selected from the group consisting of Columbium and Kovar.
Claim 4
Dependent Claim
20 words
The anode of claim 1 wherein said head outer portion and said head inner portion are joined by vacuum brazing.
Claim 5
Dependent Claim
15 words
The anode of claim 1 wherein said discharge end portion has a substantially spherical configuration.
Claim 6
Dependent Claim
190 words
An anode, for use in a laser with a body portion having an optical resonant cavity and having a lead-in communication passage connecting said optical resonant cavity with the surrounding atmosphere, comprising: a head portion having a head inner portion and a head outer portion; said head outer portion being arranged to engage said laser body portion for its support and for sealing off the surrounding atmosphere from the laser cavity; said head inner portion being adapted to connect to a conductor to receive an electric potential; a stem portion disposed in said passage and fixedly connected to said head inner portion for electric contact therewith; and a discharge end portion disposed in said passage proximate to said optical cavity and fixedly connected to said stem portion for electric contact therewith; wherein said passage has an inner surface, and said stem portion and said discharge end portion have respective outer surfaces being spaced from said passage inner surface, forming annular spaces, and said head portion is supported by said laser body portion, and said stem portion and said discharge end portion are supported by and cantilevered from said head portion.
Claim 7
Dependent Claim
190 words
An anode, for use in a laser with a body portion having an optical resonant cavity and having a lead-in communication passage connecting said optical resonant cavity with the surrounding atmosphere, comprising: a head portion having a head inner portion and a head outer portion; said head outer portion being arranged to engage said laser body portion for its support and for sealing off the surrounding atmosphere from the laser cavity; said head inner portion being adapted to connect to a conductor to receive an electric potential; a stem portion disposed in said passage and fixedly connected to said head inner portion for electric contact therewith; and a discharge end portion disposed in said passage proximate to said optical cavity and fixedly connected to said stem portion for electric contact therewith; wherein said passage has an inner surface, and said stem portion and said discharge end portion have respective outer surfaces being spaced from said passage inner surface, forming annular spaces, and said head portion is supported by said laser body portion, and said stem portion and said discharge end portion are supported by and cantilevered from said head portion.
Claim 8
Dependent Claim
38 words
The anode of claim 5 wherein said discharge end portion has a substantially spherical configuration, which spherical configuration has a diameter at least three-fourths as large as the diameter of said inner surface of said lead-in communication passage.
Claim 9
Dependent Claim
29 words
The anode of claim 5 wherein said stem portion has a diameter at least three-fourths as large as the diameter of said inner surface of said lead-in communication passage.
Claim 10
Dependent Claim
22 words
The anode of claim 7 wherein said discharge end portion has a semi-spherical shape with the same diameter as said stem portion.
References Cited (Backward Citations)
US1634201A
Cited
US3467472A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-03-16 | 1984-09-15 | 1985-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-16 | 1988-09-15 | 1989-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-16 | 1992-09-15 | 1993-03-17 | $7700.00 | Window Closed / Lapsed |