US3082674A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic exposure mechanism with magnetic control of iris blades
Assignee: Bell and Howell Co
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Filing: 1958-09-11
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Granted: 1963-03-26
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Expires: 1978-09-11
Abstract
No abstract record available.
Inventors
- 👤 John P Bagby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:11
CPC Classifications
G; G03; G03B; G03B7/00; G03B7/08; G03B7/081; G03B7/085
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
142 words
AN APERTURE CONTROL COMPRISING, A TRANSDUCER RESPONSIVE TO AN AMBIENT CONDITION, A PLURALITY OF DIAPHRAGM MEMBERS EACH HAVING AN OPENING THEREIN AND EACH BEING MOUNTED FOR MOVEMENT IN OVERLAPPING RELATIONSHIP WITH EACH OTHER WITH THE LOCI OF MOTION OF SAID OPENINGS COINCIDING AT LEAST IN ONE COMMON POINT SO THAT SAID OPENINGS COOPERATE TO FORM A CONTROLLED APERTURE, BIASING MEANS URGING EACH OF SAID DIAPHRAGM MEMBERS IN A FIRST DIRECTION OF MOTION RESPECTIVELY, AT LEAST ONE SOLENOID CORE MEANS RIGIDLY INTEGRAL WITH AT LEAST OF SAID DIAPHRAGM MEMBERS, A SOLENOID COIL CONNECTED TO BE ENERGIZED BY THE OUTPUT OF SAID TRANSDUCER, SAID CORE MEANS AND SAID SOLENOID COIL BEING POSITIONED TO FORM A SOLENOID ACTUATOR RESPONSIVE TO THE OUTPUT OF SAID TRANSDUCER TO URGE AT LEAST ONE OF SAID DIAPHRAGM MEMBERS TO MOTION IN A SECOND DIRECTION OPPOSITE TO SAID FIRST DIRECTION.
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) | 1966-03-25 | 1966-09-24 | 1967-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-03-25 | 1970-09-24 | 1971-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-03-25 | 1974-09-24 | 1975-03-26 | $7700.00 | Window Closed / Lapsed |