US3267482A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Driver circuit for magnetic recording heads
Assignee: Ampex Corp
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Filing: 1962-01-22
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Granted: 1966-08-16
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Expires: 1982-01-22
Abstract
No abstract record available.
Inventors
- 👤 Jr Ray T Moore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:45
CPC Classifications
G; G11; G11B; G11B20/00; G11B20/10; G11B20/10009; H; H04; H04N; H04N5/00; H04N5/76; H04N5/78; H04N5/782
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
A CIRCUIT FOR DRIVING A MAGNETIC HEAD FOR NON-RETURNTO-ZERO RECORDING, INCLUDING A MAGNETIC HEAT ENERGIZING CIRCUIT, A PAIR OF DRIVE TRANSISTORS, EACH HAVING A CONTROL ELECTRODE FOR CONTROLLING CURRENT FLOW THROUGH INPUT AND OUTPUT ELECTRODES THEREOF, OUTPUT CIRCUITS COUPLED TO SAID OUTPUT ELECTRODES OF SAID DRIVE TRANSISTORS, MEANS COUPLING THE OUTPUT CIRCUITS OF THE DRIVE TRANSISTORS IN SERIES WITH THE ENERGIZING CIRCUIT, A SOURCE OF RELATIVELY FIXED POTENTIAL, A PAIR OF INDUCTORS RESPECTIVELY COUPLED BETWEEN THE CONTROL ELECTRODES OF THE DRIVE TRANSISTORS AND SAID SOURCE OF RELATIVELY FIXED POTENTIAL, A FLIP-FLOP CIRCUIT COUPLED TO THE CONTROL ELECTRODES OF THE DRIVE TRANSISTORS; AND MEANS FOR APPLYING TRIGGER PULSES TO THE FLIP-FLOP CIRCUIT.
Claim 2
Dependent Claim
111 words
A CIRCUIT FOR DRIVING A MAGNETIC HEAD FOR NON-RETURNTO-ZERO RECORDING, INCLUDING A MAGNETIC HEAT ENERGIZING CIRCUIT, A PAIR OF DRIVE TRANSISTORS, EACH HAVING A CONTROL ELECTRODE FOR CONTROLLING CURRENT FLOW THROUGH INPUT AND OUTPUT ELECTRODES THEREOF, OUTPUT CIRCUITS COUPLED TO SAID OUTPUT ELECTRODES OF SAID DRIVE TRANSISTORS, MEANS COUPLING THE OUTPUT CIRCUITS OF THE DRIVE TRANSISTORS IN SERIES WITH THE ENERGIZING CIRCUIT, A SOURCE OF RELATIVELY FIXED POTENTIAL, A PAIR OF INDUCTORS RESPECTIVELY COUPLED BETWEEN THE CONTROL ELECTRODES OF THE DRIVE TRANSISTORS AND SAID SOURCE OF RELATIVELY FIXED POTENTIAL, A FLIP-FLOP CIRCUIT COUPLED TO THE CONTROL ELECTRODES OF THE DRIVE TRANSISTORS; AND MEANS FOR APPLYING TRIGGER PULSES TO THE FLIP-FLOP CIRCUIT.
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) | 1969-08-15 | 1970-02-14 | 1970-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-15 | 1974-02-14 | 1974-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-15 | 1978-02-14 | 1978-08-16 | $7700.00 | Window Closed / Lapsed |