Patent US3418909A successfully refreshed from Google Patents.
US3418909A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optically controlled photographic shutter
Assignee: CLARE LYNN RABINOW
•
Filing: 1966-04-25
•
Granted: 1968-12-31
•
Expires: 1986-04-25
Abstract
No abstract record available.
Inventors
- 👤 Rabinow Clare Lynn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:45
CPC Classifications
G; G03; G03B; G03B9/00; G03B9/58
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
A HAND-HELD PORTABLE PHOTOGRAPHIC CAMERA COMPRISING: (A) A SHUTTER FOR ADMITTING LIGHT TO THE CAMERA, (B) MEANS TO COCK SAID SHUTTER, (C) A PHOTOCELL EXPOSED TO EXTERNAL LIGHT, (D) AN AMPLIFIER CIRCUIT CONNECTED TO SAID PHOTOCELL FOR AMPLIFYING CURRENT VARIATIONS DUE TO A SUDDEN CHANGE IN EITHER DIRECTION OF AVAILABLE AMBIENT LIGHT FALLING ON SAID PHOTOCELL, WHETHER INCREASING OR DECREASING, (E) ELECTROMAGNETICALLY ACTUATED TRIPPING MEANS FOR SAID SHUTTER, CONNECTED TO THE OUTPUT OF SAID AMPLIFIER FOR TRIPPING SAID COCKED SHUTTER UPON A SUDDEN CHANGE OF LIGHT FALLING ON SAID PHOTOCELL.
Claim 2
Dependent Claim
90 words
A HAND-HELD PORTABLE PHOTOGRAPHIC CAMERA COMPRISING: (A) A SHUTTER FOR ADMITTING LIGHT TO THE CAMERA, (B) MEANS TO COCK SAID SHUTTER, (C) A PHOTOCELL EXPOSED TO EXTERNAL LIGHT, (D) AN AMPLIFIER CIRCUIT CONNECTED TO SAID PHOTOCELL FOR AMPLIFYING CURRENT VARIATIONS DUE TO A SUDDEN CHANGE IN EITHER DIRECTION OF AVAILABLE AMBIENT LIGHT FALLING ON SAID PHOTOCELL, WHETHER INCREASING OR DECREASING, (E) ELECTROMAGNETICALLY ACTUATED TRIPPING MEANS FOR SAID SHUTTER, CONNECTED TO THE OUTPUT OF SAID AMPLIFIER FOR TRIPPING SAID COCKED SHUTTER UPON A SUDDEN CHANGE OF LIGHT FALLING ON SAID PHOTOCELL.
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) | 1971-12-31 | 1972-07-01 | 1972-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-31 | 1976-07-01 | 1976-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-31 | 1980-07-01 | 1980-12-31 | $7700.00 | Window Closed / Lapsed |