US3099198A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic exposure control for photographic cameras
Assignee: Bell and Howell Co
•
Filing: 1958-06-27
•
Granted: 1963-07-30
•
Expires: 1978-06-27
Abstract
No abstract record available.
Inventors
- 👤 Arthur C Mueller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:41
CPC Classifications
G; G03; G03B; G03B7/00; G03B7/08; G03B7/081; G03B7/085
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
71 words
A MULTI-ELEMENT DIAPHRAGHM SYSTEM FOR PHOTOGRAPHIC CAMERAS COMPRISING A ROTATIONAL DIAPHRAGM MEMBER, MEANS ON SAID MEMBER CAUSING A STATIC UNBALANCE PROVIDING AN ECCENTRIC CENTER OF GRAVITY, A SEPARATE ROTARY COUNTTERBALANCE MEMBER INTERCONNECTED WITH SAID DIAPHRAGM MEMBER FOR ROTATION THEREWITH IN THE SAME DIRECTION AT THE SAME ANGULAR VELOCITY, SAID COUNTERBALANCE HAVING A CENTER OF GRAVITY POSITIONED 180* OUT OF PHASE WITH THE UNBALANCE OF SAID DIAPHRAGM MEMBER AND BALANCING SAID SYSTEM.
References Cited (Backward Citations)
US568102A
Cited
US2013362A
Cited
US2091881A
Cited
US2297262A
Cited
US2213742A
Cited
US2465578A
Cited
US2821891A
Cited
US2841064A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-07-29 | 1967-01-28 | 1967-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-07-29 | 1971-01-28 | 1971-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-07-29 | 1975-01-28 | 1975-07-30 | $7700.00 | Window Closed / Lapsed |