Patent US3349401A successfully refreshed from Google Patents.
US3349401A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Digital bearing measuring system
Assignee: TDK Micronas GmbH
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Filing: 1966-08-25
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Granted: 1967-10-24
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Expires: 1986-08-25
Abstract
No abstract record available.
Inventors
- 👤 John B Kennedy
- 👤 Ralph L Asher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:08
CPC Classifications
G; G01; G01S; G01S1/00; G01S1/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
IN A BEARING MEASURING SYSTEM, A RECEIVER ADAPTED TO DETECT BEARING INFORMATION FROM A BEACON EMITTING A COMPLEX ROTATION SIGNAL INCLUDING A FUNDAMENTAL WAVE, A HARMONIC WAVE, AND SPACED MAIN AND AUXILIARY REFERENCE SIGNALS HAVING PREDETERMINED REPETITION FREQUENCIES EQUAL TO THE FREQUENCIES OF SAID FUNDAMENTAL AND HARMONIC WAVES RESPECTIVELY, COMPRISING: A FIRST COUNTER; MEANS FOR PHASE-LOCKING SAID FIRST COUNTER TO SAID REFERENCE SIGNALS; A SECOND COUNTER; MEANS FOR DERIVING FROM SAID FIRST COUNTER A CLOCK SIGNAL; MEANS FOR APPLYING SAID CLOCK SIGNAL TO SAID SECOND COUNTER FOR CAUSING SAID SECOND COUNTER TO COUNT; MEANS FOR COMPARING IN TIME, SELECTED BITS OF SAID FIRST AND SECOND COUNTERS TO DERIVE THE VELOCITY ERROR;
Claim 2
Dependent Claim
111 words
IN A BEARING MEASURING SYSTEM, A RECEIVER ADAPTED TO DETECT BEARING INFORMATION FROM A BEACON EMITTING A COMPLEX ROTATION SIGNAL INCLUDING A FUNDAMENTAL WAVE, A HARMONIC WAVE, AND SPACED MAIN AND AUXILIARY REFERENCE SIGNALS HAVING PREDETERMINED REPETITION FREQUENCIES EQUAL TO THE FREQUENCIES OF SAID FUNDAMENTAL AND HARMONIC WAVES RESPECTIVELY, COMPRISING: A FIRST COUNTER; MEANS FOR PHASE-LOCKING SAID FIRST COUNTER TO SAID REFERENCE SIGNALS; A SECOND COUNTER; MEANS FOR DERIVING FROM SAID FIRST COUNTER A CLOCK SIGNAL; MEANS FOR APPLYING SAID CLOCK SIGNAL TO SAID SECOND COUNTER FOR CAUSING SAID SECOND COUNTER TO COUNT; MEANS FOR COMPARING IN TIME, SELECTED BITS OF SAID FIRST AND SECOND COUNTERS TO DERIVE THE VELOCITY ERROR;
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) | 1970-10-23 | 1971-04-24 | 1971-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-23 | 1975-04-24 | 1975-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-23 | 1979-04-24 | 1979-10-24 | $7700.00 | Window Closed / Lapsed |