Self-clocking five bit record-playback ststem
Abstract
Abstract 1. A SYSTEM FOR MAGNETICALLY RECORDING AND REPRODUCING DIGITAL DATA COMPRISING: (AN ENCODER FOR CONVERTING A FOUR-BIT BINARY CODE TO A FIVE-BIT BINARY CODE ALLOWING COMBINATION OF TWO SUCCESSIVE BITS ONLY AS LIKE BINARY DIGITS;) A RECORDING MEDIUM; RECORDING MEANS (CONNECTED TO SAID ENCODER) FOR RECORDING DIGITAL DATA IN (SAID) A FIVE-BIT BINARY CODE ON SAID RECORDING MEDIUM, WHEREBY THE POLARITY OF SAID RECORDING MEDIUM IS REVERSED TO RECORD ONLY ONE OF A PAIR OF BINARY DIGITS; AN ENCODER CONNECTED TO SAID RECORDING MEANS FOR CONVERTING A FOUR-BIT BINARY CODE TO SAID FIVE-BIT BINARY CODE ALLOWING COMBINATION OF ONLY TWO SUCCESSIVE BITS AS THE SECOND OF SAID PAIR OF BINARY DIGITS; PLAYBACK MEANS FOR SENSING SAID REVERSALS OF POLARITY OF SAID RECORDING MEDIUM AND GENERATING PULSES IN RESPONSE THERETO; AN OSCILLATOR CONNECTED TO SAID PLAYBACK MEANS EFFECTIVE TO GENERATE A WAVE HAVING A FREQUENCY DETERMINED BY SAID PULSES; AND LOGIC MEANS CONNECTED TO SAID PLAYBACK MEANS AND TO SAID OSCILLATOR FOR RECOVERING SAID DIGITAL DATA.
Inventors
No inventors recorded.
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-02-03 | 1978-08-05 | 1979-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-03 | 1982-08-05 | 1983-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-03 | 1986-08-05 | 1987-02-04 | $7700.00 | Window Closed / Lapsed |