Patent US3361873A successfully refreshed from Google Patents.
US3361873A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Disc recording system
Assignee: 3M Co
•
Filing: 1962-05-07
•
Granted: 1968-01-02
•
Expires: 1982-05-07
Abstract
No abstract record available.
Inventors
- 👤 Wayne R Johnson
- 👤 Moss Dean L De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:11
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/76; H04N5/84; H04N5/85; G; G11; G11B; G11B11/00; G11B11/03; G11B17/00; G11B17/34; G11B7/00; G11B7/08; G11B7/09; G11B7/095; G11B7/0953
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
232 words
IN COMBINATION IN A SYSTEM TO PRODUCE VARIABLE CHARACTERISTICS REPRESENTING INFORMATION IN A SPIRAL TRACK ON A MEDIUM CAPABLE OF VARYING ITS CHARACTERISTICS WHEN SUBJECTED TO A BEAM OF ENERGY, MEANS OPERATIVELY COUPLED TO THE MEDIUM FOR PROVIDING A ROTATIONAL MOVEMENT OF THE MEDIUM ABOUT THE CENTER OF THE MEDIUM, RECORDING MEANS DISPOSED IN SPACED RELATIONSHIP TO THE MEDIUM FOR DIRECTING A BEAM OF ENERGY TOWARD THE MEDIUM TO PRODUCE VARIATIONS IN THE CHARACTERISTICS OF THE MEDIUM IN ACCORDANCE WITH VARIATIONS IN THE CHARACTERISTICS OF THE BEAM, MEANS OPERATIVELY COUPLED TO THE LAST MENTIONED MEANS FOR PROVIDING VARIATIONS IN THE CHARACTERISTICS OF THE BEAM IN REPRESENTATION OF INFORMATION TO BE RECORDED ON THE MEDIUM, MEANS OPERATIVELY COUPLED TO THE MEDIUM FOR PROVIDING A MOVEMENT OF THE MEDIUM RELATIVE TO THE BEAM OF ENERGY ALONG A LINE HAVING A RADIAL COMPONENT EXTENDING FROM THE CENTER OF ROTATION OF THE MEDIUM TO PRODUCE A SPIRAL TRACK OF INFORMATION ON THE MEDIUM, MEANS OPERATIVELY COUPLED TO THE MEDIUM FOR PRODUCING A CONTROL SIGNAL HAVING CHARACTERISTICS VARIABLE IN ACCORDANCE WITH ECCENTRICITIES IN THE ROTATION OF THE MEDIUM ABOUT THE CENTER OF THE MEDIUM, AND MEAND OPERATIVELY COUPLED TO THE RECORDING MEANS AND THE CONTROL SIGNAL FOR VARYING THE POSITION OF THE BEAM OF ENERGY IN ACCORDANCE WITH VARIATIONS IN THE CHARACTERISTICS OF THE CONTROL SIGNAL TO COMPENSATE FOR ANY ECCENTRICS IN THE ROTATION OF THE MEDIUM.
Claim 2
Dependent Claim
232 words
IN COMBINATION IN A SYSTEM TO PRODUCE VARIABLE CHARACTERISTICS REPRESENTING INFORMATION IN A SPIRAL TRACK ON A MEDIUM CAPABLE OF VARYING ITS CHARACTERISTICS WHEN SUBJECTED TO A BEAM OF ENERGY, MEANS OPERATIVELY COUPLED TO THE MEDIUM FOR PROVIDING A ROTATIONAL MOVEMENT OF THE MEDIUM ABOUT THE CENTER OF THE MEDIUM, RECORDING MEANS DISPOSED IN SPACED RELATIONSHIP TO THE MEDIUM FOR DIRECTING A BEAM OF ENERGY TOWARD THE MEDIUM TO PRODUCE VARIATIONS IN THE CHARACTERISTICS OF THE MEDIUM IN ACCORDANCE WITH VARIATIONS IN THE CHARACTERISTICS OF THE BEAM, MEANS OPERATIVELY COUPLED TO THE LAST MENTIONED MEANS FOR PROVIDING VARIATIONS IN THE CHARACTERISTICS OF THE BEAM IN REPRESENTATION OF INFORMATION TO BE RECORDED ON THE MEDIUM, MEANS OPERATIVELY COUPLED TO THE MEDIUM FOR PROVIDING A MOVEMENT OF THE MEDIUM RELATIVE TO THE BEAM OF ENERGY ALONG A LINE HAVING A RADIAL COMPONENT EXTENDING FROM THE CENTER OF ROTATION OF THE MEDIUM TO PRODUCE A SPIRAL TRACK OF INFORMATION ON THE MEDIUM, MEANS OPERATIVELY COUPLED TO THE MEDIUM FOR PRODUCING A CONTROL SIGNAL HAVING CHARACTERISTICS VARIABLE IN ACCORDANCE WITH ECCENTRICITIES IN THE ROTATION OF THE MEDIUM ABOUT THE CENTER OF THE MEDIUM, AND MEAND OPERATIVELY COUPLED TO THE RECORDING MEANS AND THE CONTROL SIGNAL FOR VARYING THE POSITION OF THE BEAM OF ENERGY IN ACCORDANCE WITH VARIATIONS IN THE CHARACTERISTICS OF THE CONTROL SIGNAL TO COMPENSATE FOR ANY ECCENTRICS IN THE ROTATION OF THE MEDIUM.
References Cited (Backward Citations)
US2422398A
Cited
US3159711A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-01-01 | 1971-07-03 | 1972-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-01-01 | 1975-07-03 | 1976-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-01-01 | 1979-07-03 | 1980-01-02 | $7700.00 | Window Closed / Lapsed |