Patent US1177346A successfully refreshed from Google Patents.
Patent US3371214A successfully refreshed from Google Patents.
US3371214A
Expired / Lapsed
US
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Reading head with light source, rotating shutter and switched photocells
Assignee: George Richards and Co Ltd
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Filing: 1964-01-29
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Granted: 1968-02-27
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Expires: 1984-01-29
Abstract
No abstract record available.
Inventors
- 👤 Berryman Walter Pascoe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:14
CPC Classifications
G; G01; G01D; G01D5/00; G01D5/26; G01D5/32; G01D5/34; G01D5/347; G01D5/34707; G01D5/34715; G01C; G01C1/00; G01C1/02; G01C1/06; G01D5/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
65 words
AN ANGULAR READING HEAD COMPRISING A SOURCE OF RADIATION, A SINGLE SHUTTER MEANS POSITIONED ADJACENT THE SOURCE TO BE ANGULARLY MOVABLE FOR ESTABLISHING A CYCLICALLY MODULATED PATTERN OF THE RADIATION WHOSE PHASE CHANGES WITH SHUTTER POSITION, A NUMBER OF DETECTORS OF THE RADIATION RESPECTIVELY SENSITIVE TO THE RADIATION PATTERN AT PHASEDISPLACED POSITIONS, AND SWITCHING MEANS FOR CYCLICALLY RENDERING THE DETECTORS SENSITIVE AND INSENSITIVE IN TURN.
Claim 2
Dependent Claim
65 words
AN ANGULAR READING HEAD COMPRISING A SOURCE OF RADIATION, A SINGLE SHUTTER MEANS POSITIONED ADJACENT THE SOURCE TO BE ANGULARLY MOVABLE FOR ESTABLISHING A CYCLICALLY MODULATED PATTERN OF THE RADIATION WHOSE PHASE CHANGES WITH SHUTTER POSITION, A NUMBER OF DETECTORS OF THE RADIATION RESPECTIVELY SENSITIVE TO THE RADIATION PATTERN AT PHASEDISPLACED POSITIONS, AND SWITCHING MEANS FOR CYCLICALLY RENDERING THE DETECTORS SENSITIVE AND INSENSITIVE IN TURN.
References Cited (Backward Citations)
US3096444A
Cited
US3122686A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-02-26 | 1971-08-28 | 1972-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-02-26 | 1975-08-28 | 1976-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-02-26 | 1979-08-28 | 1980-02-27 | $7700.00 | Window Closed / Lapsed |