US3149902A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable contact recording
Assignee: Atlantic Richfield Co
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Filing: 1961-09-25
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Granted: 1964-09-22
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Expires: 1981-09-25
Abstract
No abstract record available.
Inventors
- 👤 Clifford D Dransfield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:37
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/024; H04N1/032; H04N1/0323
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
137 words
AN IMPROVED VARIABLE DENSITY SEISMIC RECORDER SYSTEM ADAPTED TO PRESENT AN ELECTRICAL SIGNAL IN VARIABLE DENSITY FORM COMPRISING (A) A RECORDING DRUM, (B) A PRESSURE SENSITIVE RECORD MEANS SUPERIMPOSED ON SAID RECORDING DRUM AND INCLUDING SHEETS OF (1) CARBON PAPER, (2) RECORD PAPER, AND (3) A SHOCK ABSORBING MATERIAL ADAPTED TO INCREASE CONTRAST OF SILGNALS RECORDED IN VARIABLE DENSITY FORM, AND (C) A RECORDING MEANS INCLUDING (1) A MAGNET CONTAINING AT LEAST ONE INDENTION, (2) A COIL MEANS HAVING AN INPUT CIRCUIT ADAPTED TO RECEIVE THE ELECTRICAL SIGNAL AND MOVEABLY MOUNTED WITHIN SAID INDENTION, SAID COIL MEANS ADAPTED TO MOVE INTO AND AWAY FROM SAID MAGNET ACCORDING TO DIRECTION OF FLOW OF CURRENT IN SAID COIL MEANS, AND (3) A RECORD STYLUS CONNECTED TO SAID COIL MEANS AND ADAPTED TO CONTINUOUSLY CONTACT SAID PRESSURE SENSITIVE RECORD MEANS.
Claim 2
Dependent Claim
137 words
AN IMPROVED VARIABLE DENSITY SEISMIC RECORDER SYSTEM ADAPTED TO PRESENT AN ELECTRICAL SIGNAL IN VARIABLE DENSITY FORM COMPRISING (A) A RECORDING DRUM, (B) A PRESSURE SENSITIVE RECORD MEANS SUPERIMPOSED ON SAID RECORDING DRUM AND INCLUDING SHEETS OF (1) CARBON PAPER, (2) RECORD PAPER, AND (3) A SHOCK ABSORBING MATERIAL ADAPTED TO INCREASE CONTRAST OF SILGNALS RECORDED IN VARIABLE DENSITY FORM, AND (C) A RECORDING MEANS INCLUDING (1) A MAGNET CONTAINING AT LEAST ONE INDENTION, (2) A COIL MEANS HAVING AN INPUT CIRCUIT ADAPTED TO RECEIVE THE ELECTRICAL SIGNAL AND MOVEABLY MOUNTED WITHIN SAID INDENTION, SAID COIL MEANS ADAPTED TO MOVE INTO AND AWAY FROM SAID MAGNET ACCORDING TO DIRECTION OF FLOW OF CURRENT IN SAID COIL MEANS, AND (3) A RECORD STYLUS CONNECTED TO SAID COIL MEANS AND ADAPTED TO CONTINUOUSLY CONTACT SAID PRESSURE SENSITIVE RECORD MEANS.
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) | 1967-09-22 | 1968-03-23 | 1968-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-22 | 1972-03-23 | 1972-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-22 | 1976-03-23 | 1976-09-22 | $7700.00 | Window Closed / Lapsed |