US3379828A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Programmed switching of servo error signals in tape apparatus synchronizing systems
Assignee: Ampex Corp
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Filing: 1965-03-29
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Granted: 1968-04-23
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Expires: 1985-03-29
Abstract
No abstract record available.
Inventors
- 👤 Grant M Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 04:18
CPC Classifications
G; G11; G11B; G11B19/00; G11B19/20; G11B19/28; G05; G05D; G05D13/00; G05D13/62; H; H04; H04N; H04N5/00; H04N5/76; H04N5/78; H04N5/782
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
IN A TAPE APPARATUS SYNCHRONIZING SYSTEM HAVING MEANS FOR GENERATING A PLURALITY OF ERROR SIGNALS, AND SERVO MEANS FOR CONTROLLING THE ANGULAR VELOCITY OF A ROTARY MAGNETIC TRANSDUCER HEAD DRUM IN ACCORDANCE WITH AN ERROR SIGNAL APPLIED TO THE INPUT OF THE SERVO MEANS, THE COMBINATION COMPRISING A PLURALITY OF ELECTRONICALLY CONTROLLED SWITCHES RESPECTIVELY COUPLED IN RECEIVING RELATION TO SAID ERROR SIGNALS AND COUPLED IN COMMON TO THE INPUT OF SAID SERVO MEANS, EACH OF SAID SWITCHES HAVING A CONTROL INPUT FOR ACTUATING THE SWITCH BETWEEN OPEN AND CLOSED CONDITIONS IN RESPONSE TO A CONTROL SIGNAL AT THE CONTROL INPUT, SELECTOR SWITCH MEANS HAVING A PLURALITY OF SELECTABLE OPERATIONAL MODE POSITIONS, AND LOGIC CIRCUITRY CONNECTED BETWEEN SAID SELECTOR SWITCH MEANS AND THE
Claim 2
Dependent Claim
122 words
IN A TAPE APPARATUS SYNCHRONIZING SYSTEM HAVING MEANS FOR GENERATING A PLURALITY OF ERROR SIGNALS, AND SERVO MEANS FOR CONTROLLING THE ANGULAR VELOCITY OF A ROTARY MAGNETIC TRANSDUCER HEAD DRUM IN ACCORDANCE WITH AN ERROR SIGNAL APPLIED TO THE INPUT OF THE SERVO MEANS, THE COMBINATION COMPRISING A PLURALITY OF ELECTRONICALLY CONTROLLED SWITCHES RESPECTIVELY COUPLED IN RECEIVING RELATION TO SAID ERROR SIGNALS AND COUPLED IN COMMON TO THE INPUT OF SAID SERVO MEANS, EACH OF SAID SWITCHES HAVING A CONTROL INPUT FOR ACTUATING THE SWITCH BETWEEN OPEN AND CLOSED CONDITIONS IN RESPONSE TO A CONTROL SIGNAL AT THE CONTROL INPUT, SELECTOR SWITCH MEANS HAVING A PLURALITY OF SELECTABLE OPERATIONAL MODE POSITIONS, AND LOGIC CIRCUITRY CONNECTED BETWEEN SAID SELECTOR SWITCH MEANS AND THE
References Cited (Backward Citations)
US2944108A
Cited
US3318998A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-23 | 1971-10-23 | 1972-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-23 | 1975-10-23 | 1976-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-23 | 1979-10-23 | 1980-04-23 | $7700.00 | Window Closed / Lapsed |