Patent US2081945A successfully refreshed from Google Patents.
US3216004A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical encoder with complement code storage
Assignee: AT&T Inc
•
Filing: 1961-11-07
•
Granted: 1965-11-02
•
Expires: 1981-11-07
Abstract
No abstract record available.
Inventors
- 👤 Donald R Herriott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:39
CPC Classifications
H; H03; H03M; H03M1/00; H03M1/12; H03M1/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
139 words
AN OPTICAL ENCODING AND RECORDING SYSTEM COMPRISING A MOVABLE MIRROW WHICH IS VARIABLY POSITIONED IN RESPONSE TO AN EXTERNAL CONDITION, MEANS TO ILLUMINATE SAID MOVABLE MIRROR, A CODE MASK POSITIONED TO INTERCEPT THE LIGHT REFLECTED FROM SAID MOVABLE MIRROR, SAID CODE MASK COMPRISED OF LIGHT TRANSPARENT MATERIAL HAVING A CODED PATTERN OF REFLECTIVE MATERIAL DISTRIBUTED THEREON SO AS TO FROM COMPLEMENTARY TRANSPARENT AND REFLECTIVE AREAS, SAID REFLECTIVE AREAS FORMING REFLECTED LIGHT PATTERNS CORRESPONDING TO THE BINARY REPRESENTATIONS OF RESPECTIVE POSITIONS OF SAID MIRROR, SAID LIGHT TRANSPARENT AREAS PASSING LIGHT PATTERNS THAT CORRESPOND TO THE COMPLEMENT OF SAID BINARY REPRESENTATIONS OF SAID POSITIONS OF SAID MIRROR, LIGHT DETECTION MEANS POSITIONED TO INTERCEPT THE PATTERNS OF LIGHT PASSED BY SAID CODE MASK, SAID LIGHT DETECTION AND LIGHT RECORDING MEANS POSITIONED TO INTERCEPT THE PATTERNS OF LIGHT REFLECTED FROM SAID CODE MASK.
Claim 2
Dependent Claim
139 words
AN OPTICAL ENCODING AND RECORDING SYSTEM COMPRISING A MOVABLE MIRROW WHICH IS VARIABLY POSITIONED IN RESPONSE TO AN EXTERNAL CONDITION, MEANS TO ILLUMINATE SAID MOVABLE MIRROR, A CODE MASK POSITIONED TO INTERCEPT THE LIGHT REFLECTED FROM SAID MOVABLE MIRROR, SAID CODE MASK COMPRISED OF LIGHT TRANSPARENT MATERIAL HAVING A CODED PATTERN OF REFLECTIVE MATERIAL DISTRIBUTED THEREON SO AS TO FROM COMPLEMENTARY TRANSPARENT AND REFLECTIVE AREAS, SAID REFLECTIVE AREAS FORMING REFLECTED LIGHT PATTERNS CORRESPONDING TO THE BINARY REPRESENTATIONS OF RESPECTIVE POSITIONS OF SAID MIRROR, SAID LIGHT TRANSPARENT AREAS PASSING LIGHT PATTERNS THAT CORRESPOND TO THE COMPLEMENT OF SAID BINARY REPRESENTATIONS OF SAID POSITIONS OF SAID MIRROR, LIGHT DETECTION MEANS POSITIONED TO INTERCEPT THE PATTERNS OF LIGHT PASSED BY SAID CODE MASK, SAID LIGHT DETECTION AND LIGHT RECORDING MEANS POSITIONED TO INTERCEPT THE PATTERNS OF LIGHT REFLECTED FROM SAID CODE MASK.
References Cited (Backward Citations)
US2784397A
Cited
US2994863A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-01 | 1969-05-03 | 1969-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-01 | 1973-05-03 | 1973-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-01 | 1977-05-03 | 1977-11-02 | $7700.00 | Window Closed / Lapsed |