US3354724A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stable reference apparatus
Assignee: North American Aviation Corp
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Filing: 1964-10-02
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Granted: 1967-11-28
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Expires: 1984-10-02
Abstract
No abstract record available.
Inventors
- 👤 Jimmy H Kabaian
- 👤 James F Mcgurn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:14
CPC Classifications
G; G01; G01C; G01C19/00; G01C19/56; G01C19/5635
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
A SPATIAL DIRECTION INDICATOR COMPRISING SUPPORT MEANS, S STRING MOUNTED BETWEEN TWO POINTS OF SAID SUPPORT MEANS, MEANS FOR EFFECTING VIBRATION OF SAID STRING AT A PREDETERMINED FREQUENCY IN A VIBRATORY PLANE, MAGNETIC MEANS PROVIDING A MAGNETIC FIELD AROUND SAID PLANE OF VIBRATION, MEANS FOR PROVIDING A FIRST ALTERNATING CURRENT SIGNAL HAVING A AMPLITUDE WHICH VARIES IN ACCORDANCE WITH THE VIBRATION OF SAID STRING TIMES A FACTOR K1, MEANS FOR PROVIDING A SECOND ALTERNATING CURRENT SIGNAL HAVING AN AMPLITUDE WHICH VARIES IN ACCORDANCE WITH THE VIBRATIONS OF SAID STRING TIMES A FACTOR K2 WHEREIN K1 AND K2 ARE NOT EQUAL, AND MEANS FOR SELECTIVELY CONDUCTING SAID FIRST OR SAID SECOND SIGNAL THROUGH SAID STRING TO EFFECT ROTATION OF SAID VIBRATORY PLANE.
Claim 2
Dependent Claim
121 words
A SPATIAL DIRECTION INDICATOR COMPRISING SUPPORT MEANS, S STRING MOUNTED BETWEEN TWO POINTS OF SAID SUPPORT MEANS, MEANS FOR EFFECTING VIBRATION OF SAID STRING AT A PREDETERMINED FREQUENCY IN A VIBRATORY PLANE, MAGNETIC MEANS PROVIDING A MAGNETIC FIELD AROUND SAID PLANE OF VIBRATION, MEANS FOR PROVIDING A FIRST ALTERNATING CURRENT SIGNAL HAVING A AMPLITUDE WHICH VARIES IN ACCORDANCE WITH THE VIBRATION OF SAID STRING TIMES A FACTOR K1, MEANS FOR PROVIDING A SECOND ALTERNATING CURRENT SIGNAL HAVING AN AMPLITUDE WHICH VARIES IN ACCORDANCE WITH THE VIBRATIONS OF SAID STRING TIMES A FACTOR K2 WHEREIN K1 AND K2 ARE NOT EQUAL, AND MEANS FOR SELECTIVELY CONDUCTING SAID FIRST OR SAID SECOND SIGNAL THROUGH SAID STRING TO EFFECT ROTATION OF SAID VIBRATORY PLANE.
References Cited (Backward Citations)
US3047766A
Cited
US3106847A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-11-27 | 1971-05-29 | 1971-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-27 | 1975-05-29 | 1975-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-27 | 1979-05-29 | 1979-11-28 | $7700.00 | Window Closed / Lapsed |