Patent US3214751A successfully refreshed from Google Patents.
US3214751A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Digital transducer using ronchi rulings
Assignee: General Electric Co
•
Filing: 1962-04-02
•
Granted: 1965-10-26
•
Expires: 1982-04-02
Abstract
No abstract record available.
Inventors
- 👤 Johnson Daniel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:38
CPC Classifications
H; H03; H03M; H03M1/00; G; G01; G01D; G01D5/00; G01D5/26; G01D5/32; G01D5/34; G01D5/36; G01D5/38; H03M1/002
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
A ROTARY DIGITAL TRANSDUCER COMPRISED BY A PLURALITY OF RELATIVELY ROTABLE JUXTAPOSED PARALLEL CODE WHEELS, WITH THE WHEELS HAVING PERIPHERALLY ARRANGED COINCIDING BANDS OF RULINGS FOR PRODUCING A MOIRE FRINGE EFFECT AND WITH THE NUMBER OF LINES IN THE RESPECTIVE BANDS OF RULINGS VARYING IN ACCORDANCE WITH A PREDETERMINED GEOMETRIC PROGRESSION, AND ELECTRO-OPTICAL MEANS FOR CONTINUOUSLY VIEWING THE DISCRETE INDIVIDUAL MOIRE FRINGE BANDS PRODUCED BY THE RULINGS AND FOR DERIVING A UNIQUE AND DISCRETE CODED OUTPUT ELECTRIC SIGNAL INDICATIVE OF THE EXTENT OF RELATIVE MOVEMENT BETWEEN THE RULINGS WITH RESPECT TO A FIXED ZERO REFERENCE POSITION OF THE RULINGS.
Claim 2
Dependent Claim
99 words
A ROTARY DIGITAL TRANSDUCER COMPRISED BY A PLURALITY OF RELATIVELY ROTABLE JUXTAPOSED PARALLEL CODE WHEELS, WITH THE WHEELS HAVING PERIPHERALLY ARRANGED COINCIDING BANDS OF RULINGS FOR PRODUCING A MOIRE FRINGE EFFECT AND WITH THE NUMBER OF LINES IN THE RESPECTIVE BANDS OF RULINGS VARYING IN ACCORDANCE WITH A PREDETERMINED GEOMETRIC PROGRESSION, AND ELECTRO-OPTICAL MEANS FOR CONTINUOUSLY VIEWING THE DISCRETE INDIVIDUAL MOIRE FRINGE BANDS PRODUCED BY THE RULINGS AND FOR DERIVING A UNIQUE AND DISCRETE CODED OUTPUT ELECTRIC SIGNAL INDICATIVE OF THE EXTENT OF RELATIVE MOVEMENT BETWEEN THE RULINGS WITH RESPECT TO A FIXED ZERO REFERENCE POSITION OF THE RULINGS.
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) | 1968-10-25 | 1969-04-26 | 1969-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-25 | 1973-04-26 | 1973-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-25 | 1977-04-26 | 1977-10-26 | $7700.00 | Window Closed / Lapsed |