Patent US3128168A successfully refreshed from Google Patents.
US3128168A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic cameras
Assignee: Zeiss Ikon AG
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Filing: 1962-01-15
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Granted: 1964-04-07
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Expires: 1982-01-15
Abstract
No abstract record available.
Inventors
- 👤 Gunther Willi
- 👤 Koppen Heinz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:16
CPC Classifications
G; G03; G03B; G03B7/00; G03B7/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
185 words
IN A PHOTOGRAPHIC DEVICE, SUCH AS A CAMERA, HAVING A CAMERA OBJECTIVE AND A SHUTTER MEANS, THE DEVICE COMPRISING IN COMBINATION: (A) AN ADJUSTABLE DIAPHRAGM, (B) A FLASH GUIDE NUMBER ADJUSTING MEMBER PROVIDED WITH A GUIDE NUMBER SCALE, (C) A DISTANCE ADJUSTING MEMBER PROVIDED WITH A DISTANCE SCALE, (D) MEANS FOR ADJUSTING SAID DIAPHRAGM UPON ADJUSTMENT OF SAID TWO ADJUSTING MEMBERS AND IN WHICH THE INTERVAL SPACINGS OF SAID GUIDE NUMBER SCALE ARE PROPORTIONATE TO THE INTERVAL SPACINGS OF SAID DISTANCE SCALE, AND (E) MEANS FORMING AN ABUTMENT ARRANGED IN SUCH A POSITION BETWEEN SAID TWO ADJUSTMENT MEMBERS THAT IT UPON ADJUSTMENT TO ONE LIMIT VALUE OF THE DIAPHRAGM APERTURE, PREFERABLY TO THE SMALLEST ONE, BECOMES EFFECTIVE TO PREVENT ANY RELATIVE ADJUSTMENT BETWEEN SAID TWO ADJUSTMENT MEMBERS IN A DIRECTION WHICH WOULD RESULT IN AN ADJUSTMENT TO AN IMPOSSIIBLE DIAPHRAM VALUE WHICH LIES BEYOND SAID ONE LIMIT VALUE OF SAID DIAPHRAGM APERATURE, (F) SAID ABUTMENT UPON FURTHER ADJUSTMENT OF ONE OF SAID TWO ADJUSTMENT MEMBERS CAUSES THE OTHER ADJUSTMENT MEMBER TO MOVE WITH IT, WHEREBY THE EXISTING LIMIT VALUE OF THE DIAPHRAGM APERTURE IS MAINTAINED.
Claim 2
Dependent Claim
185 words
IN A PHOTOGRAPHIC DEVICE, SUCH AS A CAMERA, HAVING A CAMERA OBJECTIVE AND A SHUTTER MEANS, THE DEVICE COMPRISING IN COMBINATION: (A) AN ADJUSTABLE DIAPHRAGM, (B) A FLASH GUIDE NUMBER ADJUSTING MEMBER PROVIDED WITH A GUIDE NUMBER SCALE, (C) A DISTANCE ADJUSTING MEMBER PROVIDED WITH A DISTANCE SCALE, (D) MEANS FOR ADJUSTING SAID DIAPHRAGM UPON ADJUSTMENT OF SAID TWO ADJUSTING MEMBERS AND IN WHICH THE INTERVAL SPACINGS OF SAID GUIDE NUMBER SCALE ARE PROPORTIONATE TO THE INTERVAL SPACINGS OF SAID DISTANCE SCALE, AND (E) MEANS FORMING AN ABUTMENT ARRANGED IN SUCH A POSITION BETWEEN SAID TWO ADJUSTMENT MEMBERS THAT IT UPON ADJUSTMENT TO ONE LIMIT VALUE OF THE DIAPHRAGM APERTURE, PREFERABLY TO THE SMALLEST ONE, BECOMES EFFECTIVE TO PREVENT ANY RELATIVE ADJUSTMENT BETWEEN SAID TWO ADJUSTMENT MEMBERS IN A DIRECTION WHICH WOULD RESULT IN AN ADJUSTMENT TO AN IMPOSSIIBLE DIAPHRAM VALUE WHICH LIES BEYOND SAID ONE LIMIT VALUE OF SAID DIAPHRAGM APERATURE, (F) SAID ABUTMENT UPON FURTHER ADJUSTMENT OF ONE OF SAID TWO ADJUSTMENT MEMBERS CAUSES THE OTHER ADJUSTMENT MEMBER TO MOVE WITH IT, WHEREBY THE EXISTING LIMIT VALUE OF THE DIAPHRAGM APERTURE IS MAINTAINED.
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) | 1967-04-07 | 1967-10-07 | 1968-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-07 | 1971-10-07 | 1972-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-07 | 1975-10-07 | 1976-04-07 | $7700.00 | Window Closed / Lapsed |