Patent US4670691A successfully refreshed from Google Patents.
US4670691A
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Getter for a ring laser angular rate sensor
Assignee: Honeywell Inc
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Filing: 1985-08-21
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Granted: 1987-06-02
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Expires: 2005-08-21
Abstract
Abstract A gas discharge device is provided with a getter film by sputtering an electrode used normally for device operation.
Inventors
- 👤 Theodore J. Podgorski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 01:35
CPC Classifications
G; G01; G01C; G01C19/00; G01C19/58; G01C19/64; G01C19/66; G01C19/661; H; H01; H01S; H01S3/00; H01S3/02; H01S3/03; H01S3/036; H01S3/038; H01S3/0388; H01S3/05; H01S3/08; H01S3/081; H01S3/083; H01S3/0835
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
122 words
A ring laser angular rate sensor comprising: a mechanically thermally stable block for providing a cavity defined substantially by inner wall portions for containing a primary gas and potentially including gas contaminants, said cavity including a plurality of interconnected cavity portions providing a closed-loop path; and at least a first anode and a cathode, in communication with said cavity and said gas therein, and in which said anode is composed of, at least in part, a getter material, said first anode and said cathode adapted to be connected, in the operate condition, to an electrical potential source for passage of electrical current therebetween through said gas and of sufficient magnitude to produce a pair of counter-propagating laser beams along said closed-loop path.
Claim 2
Dependent Claim
122 words
A ring laser angular rate sensor comprising: a mechanically thermally stable block for providing a cavity defined substantially by inner wall portions for containing a primary gas and potentially including gas contaminants, said cavity including a plurality of interconnected cavity portions providing a closed-loop path; and at least a first anode and a cathode, in communication with said cavity and said gas therein, and in which said anode is composed of, at least in part, a getter material, said first anode and said cathode adapted to be connected, in the operate condition, to an electrical potential source for passage of electrical current therebetween through said gas and of sufficient magnitude to produce a pair of counter-propagating laser beams along said closed-loop path.
Claim 3
Dependent Claim
17 words
The gas discharge device of claim 1 wherein said getter material is selected from the alkaline-earth group.
Claim 4
Dependent Claim
23 words
The gas discharge device of claim 1 wherein said getter material is selected from a group consisting of strontium, barium, titanium, and calcium.
Claim 5
Dependent Claim
42 words
The gas discharge device of claim 1 wherein said first anode and said cathode are adapted to be connected to an electrical potential source of polarity and sufficient magnitude to sputter said etter material onto portions of said cavity inner wall portions.
Claim 6
Dependent Claim
50 words
The sensor of claim 2 wherein said first anode includes: head portion means capable of providing a seal between said block and a selected cavity potion of said cavity; stem portion means fixed to said head portion means and extending means composed of, at least in part, said getter material.
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) | 1990-06-01 | 1990-12-01 | 1991-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-06-01 | 1994-12-01 | 1995-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-06-01 | 1998-12-01 | 1999-06-02 | $7700.00 | Window Closed / Lapsed |