Patent US3230856A successfully refreshed from Google Patents.
US3230856A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mechanism for selectively automatically and manually adjusting exposure apertures inphotographic cameras
Assignee: Nikon Corp
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Filing: 1965-03-23
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Granted: 1966-01-25
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Expires: 1985-03-23
Abstract
No abstract record available.
Inventors
- 👤 Sho Koji
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:31
CPC Classifications
G; G03; G03B; G03B7/00; G03B7/08; G03B7/081; G03B7/085
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
133 words
A MECHANISM FOR VARYING THE MAGNITUDE OF THE EXPOSURE APERTURE OF A CEMERA OBJECTIVE SELECTIVELY MANUALLY AND AUTOMATICALLY, THE CAMERA HAVING A BUILT-IN EXPOSURE METER INCLUDING A ROTATABLE COIL, COMPRISING A PAIR OF EXPOSURE APERTURE BLADES FOR THE CAMERA OBJECTIVE, A FIRST PIN EXTENDING FROM THE ROTATABLE COIL, MEANS FOR ROTATING THE ROTATABLE COIL, AN ARCUATE CAM SLOT IN EACH EXPOSURE APERTURE BLADE OF THE PAIR, AND A PAIR OF LATERALLY SPACED FIXED PINS IN THE CAMERA OF WHICH EACH PIN PIVOTALLY SUPPORTS AN APERTURE BLADE OF THE PAIR AT THE CENTER OF GRAVITY OF THE SUPPORTED BLADE, EACH BLADE HAVING A CUT-AWAY PORTION OF WEDGE-LIKE SHAPE WITH CURVED ELONGATED SIDES DIVERGING IN THE OUTWARD DIRECTION OF THE BLADE AND OVERLAPPING THE CUT-AWAY PORTION OF THE OTHER BLADE, THE CUT-AWAY BLADE PORTIONS FACING
Claim 2
Dependent Claim
133 words
A MECHANISM FOR VARYING THE MAGNITUDE OF THE EXPOSURE APERTURE OF A CEMERA OBJECTIVE SELECTIVELY MANUALLY AND AUTOMATICALLY, THE CAMERA HAVING A BUILT-IN EXPOSURE METER INCLUDING A ROTATABLE COIL, COMPRISING A PAIR OF EXPOSURE APERTURE BLADES FOR THE CAMERA OBJECTIVE, A FIRST PIN EXTENDING FROM THE ROTATABLE COIL, MEANS FOR ROTATING THE ROTATABLE COIL, AN ARCUATE CAM SLOT IN EACH EXPOSURE APERTURE BLADE OF THE PAIR, AND A PAIR OF LATERALLY SPACED FIXED PINS IN THE CAMERA OF WHICH EACH PIN PIVOTALLY SUPPORTS AN APERTURE BLADE OF THE PAIR AT THE CENTER OF GRAVITY OF THE SUPPORTED BLADE, EACH BLADE HAVING A CUT-AWAY PORTION OF WEDGE-LIKE SHAPE WITH CURVED ELONGATED SIDES DIVERGING IN THE OUTWARD DIRECTION OF THE BLADE AND OVERLAPPING THE CUT-AWAY PORTION OF THE OTHER BLADE, THE CUT-AWAY BLADE PORTIONS FACING
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) | 1969-01-24 | 1969-07-26 | 1970-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-24 | 1973-07-26 | 1974-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-24 | 1977-07-26 | 1978-01-25 | $7700.00 | Window Closed / Lapsed |