US3124049A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic exposure control for camera
Assignee: —
•
Filing: —
•
Granted: 1964-03-10
•
Expires: 1981-03-10
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:25
CPC Classifications
G; G03; G03B; G03B7/00; G03B7/08; G03B7/081; G03B7/083; G03B9/00; G03B9/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
IN A PHOTOGRAPHIC CAMERA MEANS TO CONTROL THE QUANTITY OF LIGHT REACHING THE FILM AT DIFFERENT AREAS THEREOF DURING AN EXPOSING CYCLE COMPRISING A LENS FOR FOCUSING AN IMAGE UPON A FOCAL PLANE, A FOCAL PLANE SHUTTER HAVING A SLOT THEREIN, A LINEAR TYPE ELECTROMAGNETIC MOTOR ACTING TO DRIVE SAID SHUTTER, LIGHT SENSING MEANS OPERABLE TO READ LIGHT FLUX VALUES OF THE IMAGE AT SUCCESSIVE POSITIONS OF SAID SLOT IN SAID SHUTTER, AN ENERGY SOURCE CONNECTED TO ACTUATE SAID MOTOR, MEANS TO CONTROL THE OUTPUT OF SAID SOURCE IN ACCORDANCE WITH THE OUTPUT OF SAID SENSING MEANS WHEREBY THE CHANGES IN SPEED OF TRAVEL OF THE SHUTTER WILL CONTROL THE EXPOSURE UPON THE FILM.
Claim 2
Dependent Claim
114 words
IN A PHOTOGRAPHIC CAMERA MEANS TO CONTROL THE QUANTITY OF LIGHT REACHING THE FILM AT DIFFERENT AREAS THEREOF DURING AN EXPOSING CYCLE COMPRISING A LENS FOR FOCUSING AN IMAGE UPON A FOCAL PLANE, A FOCAL PLANE SHUTTER HAVING A SLOT THEREIN, A LINEAR TYPE ELECTROMAGNETIC MOTOR ACTING TO DRIVE SAID SHUTTER, LIGHT SENSING MEANS OPERABLE TO READ LIGHT FLUX VALUES OF THE IMAGE AT SUCCESSIVE POSITIONS OF SAID SLOT IN SAID SHUTTER, AN ENERGY SOURCE CONNECTED TO ACTUATE SAID MOTOR, MEANS TO CONTROL THE OUTPUT OF SAID SOURCE IN ACCORDANCE WITH THE OUTPUT OF SAID SENSING MEANS WHEREBY THE CHANGES IN SPEED OF TRAVEL OF THE SHUTTER WILL CONTROL THE EXPOSURE UPON THE FILM.
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) | 1967-03-10 | 1967-09-09 | 1968-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-03-10 | 1971-09-09 | 1972-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-03-10 | 1975-09-09 | 1976-03-10 | $7700.00 | Window Closed / Lapsed |