US3291019A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Exposure control override for sunlight exposure
Assignee: Eastman Kodak Co
•
Filing: 1964-08-17
•
Granted: 1966-12-13
•
Expires: 1984-08-17
Abstract
No abstract record available.
Inventors
- 👤 John H Eagle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:21
CPC Classifications
G; G03; G03B; G03B7/00; G03B7/08; G03B7/081; G03B7/085
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
137 words
AN EXPOSURE CONTROL SYSTEM FOR USE IN A CAMERA AND COMPRISING: (A) A CIRCUIT INCLUDING A PHOTORESPONSIVE DEVICE AND AN ELECTROMAGNET ENERGIZABLE UNDER CONTROL OF SAID DEVICE AS A FUNCTION OF SCENE BRIGHTNESS, (B) AN ARMATURE NORMALLY MAINTAINED IN A FIRST POSITION AND MOVABLE TO A SECOND POSITION IN RESPONSE TO A PREDETERMINED LEVEL OF ENERGIZATION OF SAID ELECTROMAGNET, (C) AN EXPOSURE REGULATING MEMBER MOVABLE THROUGH A RANGE OF POSITIONS IN WHICH IT CONDITIONS SAID CAMERA FOR CORRECT EXPOSURE AT A CORRESPONDING RANGE OF VALUES OF SCENE BRIGHTNESS DURING NORMAL OPERATION, (D) MEANS FOR MOVING SAID REGULATING MEMBER, AND (E) MEANS CONTROLLED BY SAID ARMATURE AND EFFECTIVE, UPON FAILURE OF SAID CIRCUIT, FOR STOPPING SAID REGULATING MEMBER AT A POSITION CORRESPONDING TO A PREDETERMINED INTERMEDIATE VALUE OF SCENE BRIGHTNESS, SAID POSITION BEING OUTSIDE SAID RANGE OF POSITIONS.
Claim 2
Dependent Claim
137 words
AN EXPOSURE CONTROL SYSTEM FOR USE IN A CAMERA AND COMPRISING: (A) A CIRCUIT INCLUDING A PHOTORESPONSIVE DEVICE AND AN ELECTROMAGNET ENERGIZABLE UNDER CONTROL OF SAID DEVICE AS A FUNCTION OF SCENE BRIGHTNESS, (B) AN ARMATURE NORMALLY MAINTAINED IN A FIRST POSITION AND MOVABLE TO A SECOND POSITION IN RESPONSE TO A PREDETERMINED LEVEL OF ENERGIZATION OF SAID ELECTROMAGNET, (C) AN EXPOSURE REGULATING MEMBER MOVABLE THROUGH A RANGE OF POSITIONS IN WHICH IT CONDITIONS SAID CAMERA FOR CORRECT EXPOSURE AT A CORRESPONDING RANGE OF VALUES OF SCENE BRIGHTNESS DURING NORMAL OPERATION, (D) MEANS FOR MOVING SAID REGULATING MEMBER, AND (E) MEANS CONTROLLED BY SAID ARMATURE AND EFFECTIVE, UPON FAILURE OF SAID CIRCUIT, FOR STOPPING SAID REGULATING MEMBER AT A POSITION CORRESPONDING TO A PREDETERMINED INTERMEDIATE VALUE OF SCENE BRIGHTNESS, SAID POSITION BEING OUTSIDE SAID RANGE OF POSITIONS.
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) | 1969-12-12 | 1970-06-13 | 1970-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-12 | 1974-06-13 | 1974-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-12 | 1978-06-13 | 1978-12-13 | $7700.00 | Window Closed / Lapsed |