US3272103A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photoelectric measuring device
Assignee: Zeiss Ikon AG
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Filing: 1963-10-31
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Granted: 1966-09-13
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Expires: 1983-10-31
Abstract
No abstract record available.
Inventors
- 👤 Ploke Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:54
CPC Classifications
G; G01; G01J; G01J1/00; G01J1/10; G01J1/20; G01J1/22; G01J1/24; G01J1/26; G01J1/42; G01J1/4209; G01J1/4214; G01J1/02; G01J1/04; G01J1/0403; G01J1/0407; G01J1/0437; G01J1/0448
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
129 words
A DEVICE FOR PHOTOELECTRIC OPTOMETRY HAVING AN OPTICAL AXIS INCLUDING AN OBJECTIVE ARRANGED IN SAID OPTICAL AXIS IN FRONT OF A PHOTOELECTRIC MEASURNG SURFACE, AN ADJUSTABLE FIELD OF VISION DIAPHRAGM (8) POSITIONED IN THE FOCAL PLANE OF SAID OBJECTIVE, A SECOND ADJUSTABLE DIAPHRAGM (7) ARRANGED IN AXIALLY SPACED RELATION FROM SAID FIRST MENTIONED FIELD OF VISION DIAPHRAGM, TWO DOUBLEARMED PIVOTALLY CONNECTED LEVERS OPERATIVELY CONNECTING SAID TWO DIAPHRAGMS WITH ONE ANOTHER SO THAT AN ADJUSTMENT OF ONE OF SAID DIAPHRAGMS IN ONE DIRECTION CAUSES AN ADJUSTMENT OF THE OTHER ONE OF SAID DIAPHRAGMS IN THE OPPOSITE DIRECTION, AND LIGHT COLLECTING OPTICAL MEANS ARRANGED IN THE AREA OF SAID FOCAL PLANE IN FRONT OF SAID PHOTOELECTRIC MEASURING SURFACE THROUGH WHICH THE MEASURING LIGHT RAYS PASS BEFORE THEY REACH SAID MEASURING SURFACE.
References Cited (Backward Citations)
US2186616A
Cited
US2448220A
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GB893886A
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US3185052A
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FR1295852A
Cited
FR1297683A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-09-12 | 1970-03-14 | 1970-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-12 | 1974-03-14 | 1974-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-12 | 1978-03-14 | 1978-09-13 | $7700.00 | Window Closed / Lapsed |