US3612690A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laser gyro dither circuit
Assignee: Individual
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Filing: 1970-07-08
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Granted: 1971-10-12
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Expires: 1990-07-08
Abstract
Abstract Frequency coupling of counterrotating beams in a gaseous laser gyro is prevented by varying the discharge current in the laser. The circuit is for use with a laser having a common cathode and two anodes, and includes a source of random signals, such as a noise diode generator. The signals from the generator are amplified and limited to give a variable frequency and pulsewidth rectangular wave. This wave, in its original form, and in a phase-shifted form, controls a push-pull amplifier. The controlled elements (such as transistors) in the push-pull amplifier are in series with the laser anodes. Thus, a random rectangular wave is effectably applied to the discharge current through each anode.
Inventors
- 👤 Robert C Staats
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:14
CPC Classifications
G; G01; G01C; G01C19/00; G01C19/58; G01C19/64; G01C19/66; G01C19/661; H; H01; H01S; H01S3/00; H01S3/09; H01S3/097; H01S3/05; H01S3/08; H01S3/081; H01S3/083; H01S3/0835
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
169 words
A circuit for preventing frequency coupling in a gaseous ring laser having counterrotating beams, in which the laser is supplied discharge current from a power supply having at least two terminals of a first polarity and at leAst one terminal of a second polarity opposite to said first polarity, wherein said laser has at least two electrodes adapted to be connected to said first two terminals and one electrode connected to said one terminal, the invention comprising: a source of random electrical signals, wave-shaping means connected to said source for processing said signals into first and second rectangular output waves; current-controlling means including first and second currentcontrolling devices each having a control terminal and first and second power terminals; said power terminals of said current-controlling devices being connected between said two terminals of said power supply and said two electrodes of said laser, said control terminals being connected to said waveshaping means, whereby said first and second rectangular output waves control current through said first and second currentcontrolling devices.
Claim 2
Dependent Claim
169 words
A circuit for preventing frequency coupling in a gaseous ring laser having counterrotating beams, in which the laser is supplied discharge current from a power supply having at least two terminals of a first polarity and at leAst one terminal of a second polarity opposite to said first polarity, wherein said laser has at least two electrodes adapted to be connected to said first two terminals and one electrode connected to said one terminal, the invention comprising: a source of random electrical signals, wave-shaping means connected to said source for processing said signals into first and second rectangular output waves; current-controlling means including first and second currentcontrolling devices each having a control terminal and first and second power terminals; said power terminals of said current-controlling devices being connected between said two terminals of said power supply and said two electrodes of said laser, said control terminals being connected to said waveshaping means, whereby said first and second rectangular output waves control current through said first and second currentcontrolling devices.
Claim 3
Dependent Claim
28 words
The circuit as set forth in claim 1 in which each of said current-controlling devices is a transistor, and said control terminals are the bases of said transistors.
Claim 4
Dependent Claim
24 words
The circuit as set forth in claim 2 further including a respective resistor connected between the emitter and collector of each of said transistors.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-11 | 1975-04-12 | 1975-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-11 | 1979-04-12 | 1979-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-11 | 1983-04-12 | 1983-10-12 | $7700.00 | Window Closed / Lapsed |