Patent US3205796A successfully refreshed from Google Patents.
US3205796A
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Photoelectric exposure meter with variable angular field
Assignee: Eastman Kodak Co
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Filing: 1962-10-22
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Granted: 1965-09-14
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Expires: 1982-10-22
Abstract
No abstract record available.
Inventors
- 👤 Lieser Ernst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:10
CPC Classifications
G; G01; G01J; G01J1/00; G01J1/02; G01J1/04; G01J1/0407; G01J1/0437; G01J1/0448; G01J1/06; G01J1/10; G01J1/20; G01J1/28; G01J1/42; G01J1/4209; G01J1/4214
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
IN A PHOTOELECTRIC EXPOSURE METER FOR DETERMINING SCENE BRIGHTNESS AND HAVING AN OPTICAL AXIS, THE COMBINATION COMPRISING: A PHOTOCELL DISPOSED ON THE OPTICALA AXIS FOR ILLUMINATION BY SCENE LIGHT, MEANNS FOR VARYING THE ANGULAR FIELD OF LIGHT RECEIVABLE BY THE PHOTOCELL, OPTICAL MEANS POSITIONED ON THE OPTICAL AXIS INTERMEDIATE THE PHOTOCCELL AND VARYING MEANS TO EFFECT EVENN ILLUMINATION OF THE PHOTOCELL, AND MEANS TO ADJUST THE POSITION OF THE PHOTOCELL RELATIVE TO THE OPTICAL MEANS IN RESPONSE TO THE VARYING MEANS TO MAINTAIN A PREDETERMINED LIGHT FLUX FALLING ON THE PHOTOCELL.
Claim 2
Dependent Claim
91 words
IN A PHOTOELECTRIC EXPOSURE METER FOR DETERMINING SCENE BRIGHTNESS AND HAVING AN OPTICAL AXIS, THE COMBINATION COMPRISING: A PHOTOCELL DISPOSED ON THE OPTICALA AXIS FOR ILLUMINATION BY SCENE LIGHT, MEANNS FOR VARYING THE ANGULAR FIELD OF LIGHT RECEIVABLE BY THE PHOTOCELL, OPTICAL MEANS POSITIONED ON THE OPTICAL AXIS INTERMEDIATE THE PHOTOCCELL AND VARYING MEANS TO EFFECT EVENN ILLUMINATION OF THE PHOTOCELL, AND MEANS TO ADJUST THE POSITION OF THE PHOTOCELL RELATIVE TO THE OPTICAL MEANS IN RESPONSE TO THE VARYING MEANS TO MAINTAIN A PREDETERMINED LIGHT FLUX FALLING ON THE PHOTOCELL.
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) | 1968-09-13 | 1969-03-15 | 1969-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-13 | 1973-03-15 | 1973-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-13 | 1977-03-15 | 1977-09-14 | $7700.00 | Window Closed / Lapsed |