Patent US3122644A successfully refreshed from Google Patents.
US3122644A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Binocular star sensing system
Assignee: North American Aviation Corp
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Filing: 1951-09-15
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Granted: 1964-02-25
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Expires: 1971-09-15
Abstract
No abstract record available.
Inventors
- 👤 William B Greenlee
- 👤 Victor A Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 03:31
CPC Classifications
G; G01; G01S; G01S3/00; G01S3/78; G01S3/782; G01S3/787
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
159 words
MEANS FOR PRODUCING SHAFT ROTATIONS INDICATIVE OF THE POLAR COORDINATES OF A STAR IMAGE IN AN OPTICAL FIELD COMPRISING A PAIR OF OPTICAL SYSTEMS FOR GATHERING LIGHT FROM A STAR, A ROTATING COMPENSATED HALF-SECTOR DISC RETICLE FOR CHOPPING THE LIGHT FROM A STAR GATHERED BY ONE OF SAID OPTICAL SYSTEMS, A ROTATING COMPENSATED HALFSECTOR DISC RETICLE THE DIAMETRAL BOUNDARY OF WHICH IS A SPIRAL SYMMETRICAL ABOUT ITS CENTER OF ROTATION FOR CHOPPING THE LIGHT FROM SAID STAR GATHERED BY THE OTHER OF SAID OPTICAL SYSTEMS, MEANS FOR ROTATING SAID RETICLES IN SYNCHRONISM, REFERENCE MEANS FOR GENERATING AN ALTERNATING CURRENT SIGNAL IN RESPONSE TO THE ROTATION OF SAID RETICLES, A PAIR OF PHOTOELECTRIC CELLS RESPONSIVE TO LIGHT PASSING THROUGH EACH OF SAID RETICLES, AND A PAIR OF DIFFERENTIAL SELSYNS FOR PRODUCING SHAFT ROTATIONS IN RESPONSE TO SIGNALS FROM SAID PHOTOELECTRIC CELLS AND SAID REFERENCE MEANS TO THEREBY PRODUCE SHAFT ROTATIONS INDICATIVE OF THE COORDINATES OF THE IMAGE OF SAID STAR.
Claim 2
Dependent Claim
159 words
MEANS FOR PRODUCING SHAFT ROTATIONS INDICATIVE OF THE POLAR COORDINATES OF A STAR IMAGE IN AN OPTICAL FIELD COMPRISING A PAIR OF OPTICAL SYSTEMS FOR GATHERING LIGHT FROM A STAR, A ROTATING COMPENSATED HALF-SECTOR DISC RETICLE FOR CHOPPING THE LIGHT FROM A STAR GATHERED BY ONE OF SAID OPTICAL SYSTEMS, A ROTATING COMPENSATED HALFSECTOR DISC RETICLE THE DIAMETRAL BOUNDARY OF WHICH IS A SPIRAL SYMMETRICAL ABOUT ITS CENTER OF ROTATION FOR CHOPPING THE LIGHT FROM SAID STAR GATHERED BY THE OTHER OF SAID OPTICAL SYSTEMS, MEANS FOR ROTATING SAID RETICLES IN SYNCHRONISM, REFERENCE MEANS FOR GENERATING AN ALTERNATING CURRENT SIGNAL IN RESPONSE TO THE ROTATION OF SAID RETICLES, A PAIR OF PHOTOELECTRIC CELLS RESPONSIVE TO LIGHT PASSING THROUGH EACH OF SAID RETICLES, AND A PAIR OF DIFFERENTIAL SELSYNS FOR PRODUCING SHAFT ROTATIONS IN RESPONSE TO SIGNALS FROM SAID PHOTOELECTRIC CELLS AND SAID REFERENCE MEANS TO THEREBY PRODUCE SHAFT ROTATIONS INDICATIVE OF THE COORDINATES OF THE IMAGE OF SAID STAR.
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) | 1967-02-24 | 1967-08-26 | 1968-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-02-24 | 1971-08-26 | 1972-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-02-24 | 1975-08-26 | 1976-02-25 | $7700.00 | Window Closed / Lapsed |