Patent US3418904A successfully refreshed from Google Patents.
US3418904A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic camera with automatic electronic flash and daylight diaphragm control
Assignee: Agfa Gevaert AG
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Filing: 1966-07-05
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Granted: 1968-12-31
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Expires: 1986-07-05
Abstract
No abstract record available.
Inventors
- 👤 Wick Richard
- 👤 Biedermann Friedrich
- 👤 Winkler Alfred
- 👤 Bestenreiner Friedrich
- 👤 Kiper Gerd
- 👤 Pawlik Guenter
- 👤 Sybel Reinhard Von
- 👤 Wasielewski Erwin Von
- 👤 Wagner Karl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:10
CPC Classifications
H; H05; H05B; H05B41/00; H05B41/14; H05B41/30; H05B41/32; G; G03; G03B; G03B7/00; G03B7/08; G03B7/081; G03B7/085
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
IN A PHOTOGRAPHIC CAMERA, A DIAPHRAGM COMPRISING SETTING MEANS OPERATIVE TO VARY THE SIZE OF THE DIAPHRAGM APERTURE BETWEEN A MINIMUM VALUE AND A MAXIMUM VALUE; ELECTRONIC FLASH MEANS HAVING A FIRST CIRCUIT FOR DISCHARGING A PRELIMINARY FLASH AND THEREUPON A MAIN FLASH; AND AN EXPOSURE CONTROL HAVING A SECOND CIRCUIT COMPRISING ACTUATING MEANS FOR TRANSMITTING TO SAID FIRST CIRCUIT IMPULSES FOR GENERATION OF SAID PRELIMINARY FLASH, AND CONTROL MEANS FOR CONTROLLING THE OPERATION OF SAID SETTING MEANS AS A FUNCTION OF THE INTENSITY OF INCIDENT LIGHT AND INCLUDING LIGHT-SENSITIVE TRANSDUCER MEANS FOR INFLUENCING THE SIZE OF SAID APERTURE AS A FUNCTION OF THE INTENSITY OF LIGHT REACHING SAID TRANSDUCER MEANS IN RESPONSE TO DISCHARGE OF SAID PRELIMINARY FLASH.
Claim 2
Dependent Claim
119 words
IN A PHOTOGRAPHIC CAMERA, A DIAPHRAGM COMPRISING SETTING MEANS OPERATIVE TO VARY THE SIZE OF THE DIAPHRAGM APERTURE BETWEEN A MINIMUM VALUE AND A MAXIMUM VALUE; ELECTRONIC FLASH MEANS HAVING A FIRST CIRCUIT FOR DISCHARGING A PRELIMINARY FLASH AND THEREUPON A MAIN FLASH; AND AN EXPOSURE CONTROL HAVING A SECOND CIRCUIT COMPRISING ACTUATING MEANS FOR TRANSMITTING TO SAID FIRST CIRCUIT IMPULSES FOR GENERATION OF SAID PRELIMINARY FLASH, AND CONTROL MEANS FOR CONTROLLING THE OPERATION OF SAID SETTING MEANS AS A FUNCTION OF THE INTENSITY OF INCIDENT LIGHT AND INCLUDING LIGHT-SENSITIVE TRANSDUCER MEANS FOR INFLUENCING THE SIZE OF SAID APERTURE AS A FUNCTION OF THE INTENSITY OF LIGHT REACHING SAID TRANSDUCER MEANS IN RESPONSE TO DISCHARGE OF SAID PRELIMINARY FLASH.
References Cited (Backward Citations)
US3308733A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-12-31 | 1972-07-01 | 1972-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-31 | 1976-07-01 | 1976-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-31 | 1980-07-01 | 1980-12-31 | $7700.00 | Window Closed / Lapsed |