Patent US3324465A successfully refreshed from Google Patents.
US3324465A
Expired / Lapsed
US
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Digital surface-positioning arrangement employing gray coding
Assignee: AT&T Inc
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Filing: 1964-10-21
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Granted: 1967-06-06
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Expires: 1984-10-21
Abstract
No abstract record available.
Inventors
- 👤 Raymond W Ketchledge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:29
CPC Classifications
G; G05; G05B; G05B19/00; G05B19/02; G05B19/18; G05B19/19; G05B19/27; G05B19/29; G05B19/291; H; H03; H03M; H03M1/00; H03M1/12; H03M1/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
A DIGITAL SERVO SYSTEM FOR POSITIONING A MOVABLE MECHANICAL SURFACE COMPRISING A SURFACE-POSITIONING MOTOR, A FIRST BISTABLE FLIP-FLOP CONNECTED TO SAID MOTOR, A SECOND BISTABLE FLIP-FLOP FOR SELECTIVELY INHIBITING SWITCHING IN SAID FIRST FLIP-FLOP AND FOR RENDERING SAID MOTOR RESPONSIVE TO THE PARTICULAR BISTABLE STATE OF SAID FIRST FLIPFLOP, SOURCE MEANS FOR SERIALLY SUPPLYING GRAY-CODED BINARY INPUT INFORMATION, AND A PLURALITY OF FEEDBACK TRANSFER SWITCH MEANS SELECTIVELY SET IN ACCORDANCE WITH A GRAY-CODED REPRESENTATION OF THE POSITION OF SAID MECHANICAL SURFACE FOR SWITCHING SAID FIRST FLIP-FLOP RESPONSIVE TO EACH BINARY 1 SIGNAL SUPPLIED BY SAID INPUT SOURCE MEANS AND FOR SWITCHING SAID SECOND FLIP-FLOP RESPONSIVE TO A MISMATCH BETWEEN AN INPUT DIGIT AND THE PARTICULAR SETTING OF A CORRESPONDING ONE OF SAID SWITCH MEANS.
Claim 2
Dependent Claim
124 words
A DIGITAL SERVO SYSTEM FOR POSITIONING A MOVABLE MECHANICAL SURFACE COMPRISING A SURFACE-POSITIONING MOTOR, A FIRST BISTABLE FLIP-FLOP CONNECTED TO SAID MOTOR, A SECOND BISTABLE FLIP-FLOP FOR SELECTIVELY INHIBITING SWITCHING IN SAID FIRST FLIP-FLOP AND FOR RENDERING SAID MOTOR RESPONSIVE TO THE PARTICULAR BISTABLE STATE OF SAID FIRST FLIPFLOP, SOURCE MEANS FOR SERIALLY SUPPLYING GRAY-CODED BINARY INPUT INFORMATION, AND A PLURALITY OF FEEDBACK TRANSFER SWITCH MEANS SELECTIVELY SET IN ACCORDANCE WITH A GRAY-CODED REPRESENTATION OF THE POSITION OF SAID MECHANICAL SURFACE FOR SWITCHING SAID FIRST FLIP-FLOP RESPONSIVE TO EACH BINARY 1 SIGNAL SUPPLIED BY SAID INPUT SOURCE MEANS AND FOR SWITCHING SAID SECOND FLIP-FLOP RESPONSIVE TO A MISMATCH BETWEEN AN INPUT DIGIT AND THE PARTICULAR SETTING OF A CORRESPONDING ONE OF SAID SWITCH MEANS.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-06-05 | 1970-12-05 | 1971-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-06-05 | 1974-12-05 | 1975-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-06-05 | 1978-12-05 | 1979-06-06 | $7700.00 | Window Closed / Lapsed |