US3071039A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic exposure control with an intermittent needle entrapment
Assignee: Bell and Howell Co
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Filing: 1959-02-09
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Granted: 1963-01-01
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Expires: 1979-02-09
Abstract
No abstract record available.
Inventors
- 👤 David M Macmillin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:54
CPC Classifications
G; G03; G03B; G03B7/00; G03B7/08; G03B7/081; G03B7/085
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
165 words
IN A PHOTOGRAPHIC CAMERA HAVING A FILM EXPOSING APERTURE AND A DIAPHRAGM FOR CONTROLLING THE AMOUNT OF LIGHT REACHING SAID APERTURE, THE IMPROVEMENT OF MEANS FOR AUTOMATICALLY ADJUSTING SAID DIAPHRAGM IN RESPONSE TO THE LIGHT AVAILABLE COMPRISING: A PHOTOELECTRIC CELL, A GALVANOMETER HAVING A MOVABLE CIRCUIT COIL ASSOCIATED THEREWITH MOVABLE IN RESPONSE TO VARIATIONS IN THE ELECTRICAL OUTPUT OF SAID CELL, SAID DIAPHRAGM COMPRISING AT LEAST ONE MASKING MEMBER OPERABLE TO DEFINE A DIAPHRAGM OPENING, POWER MEANS, MOTION TRANSLATION MEANS DRIVINGLY CONNECTED TO SAID MASKING MEMBER, FIRST AND SECOND POWER TRANSMISSION MEANS DRIVINGLY CONNECTED TO SAID MOTION TRANSLATION MEANS FOR DRIVING SAID MOTION TRANSLATION MEANS IN OPPOSITE DIRECTIONS, A PIVOTED MEMBER CONNECTED TO SAID POWER TRANSMISSION MEANS FOR SELECTIVELY MOVING ONE OF SAID POWER TRANSMISSION MEANS INTO DRIVING CONNECTION WITH SAID POWER MEANS TO VARY THE AREA OF THE DIAPHRAGM DEFINED BY SAID MASKING MEMBER, AND MEANS FOR EFFECTING PIVOTAL MOVEMENT OF SAID PIVOTED MEMBER AS A FUNCTION OF THE POSITION OF SAID CIRCUIT COIL.
Claim 2
Dependent Claim
165 words
IN A PHOTOGRAPHIC CAMERA HAVING A FILM EXPOSING APERTURE AND A DIAPHRAGM FOR CONTROLLING THE AMOUNT OF LIGHT REACHING SAID APERTURE, THE IMPROVEMENT OF MEANS FOR AUTOMATICALLY ADJUSTING SAID DIAPHRAGM IN RESPONSE TO THE LIGHT AVAILABLE COMPRISING: A PHOTOELECTRIC CELL, A GALVANOMETER HAVING A MOVABLE CIRCUIT COIL ASSOCIATED THEREWITH MOVABLE IN RESPONSE TO VARIATIONS IN THE ELECTRICAL OUTPUT OF SAID CELL, SAID DIAPHRAGM COMPRISING AT LEAST ONE MASKING MEMBER OPERABLE TO DEFINE A DIAPHRAGM OPENING, POWER MEANS, MOTION TRANSLATION MEANS DRIVINGLY CONNECTED TO SAID MASKING MEMBER, FIRST AND SECOND POWER TRANSMISSION MEANS DRIVINGLY CONNECTED TO SAID MOTION TRANSLATION MEANS FOR DRIVING SAID MOTION TRANSLATION MEANS IN OPPOSITE DIRECTIONS, A PIVOTED MEMBER CONNECTED TO SAID POWER TRANSMISSION MEANS FOR SELECTIVELY MOVING ONE OF SAID POWER TRANSMISSION MEANS INTO DRIVING CONNECTION WITH SAID POWER MEANS TO VARY THE AREA OF THE DIAPHRAGM DEFINED BY SAID MASKING MEMBER, AND MEANS FOR EFFECTING PIVOTAL MOVEMENT OF SAID PIVOTED MEMBER AS A FUNCTION OF THE POSITION OF SAID CIRCUIT COIL.
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) | 1965-12-31 | 1966-07-02 | 1967-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-31 | 1970-07-02 | 1971-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-31 | 1974-07-02 | 1975-01-01 | $7700.00 | Window Closed / Lapsed |