US3232191A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low-scene-brightness signal for photographic cameras
Assignee: Eastman Kodak Co
•
Filing: 1962-11-20
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Granted: 1966-02-01
•
Expires: 1982-11-20
Abstract
No abstract record available.
Inventors
- 👤 William T Sherwood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:37
CPC Classifications
G; G03; G03B; G03B17/00; G03B17/18; G03B17/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
IN COMBINATION WITH A PHOTOGRAPHIC CAMERA, A FLASHING LIGHT LOW-SCENE-BRIGHTNESS SIGNAL DEVICE COMPRISING AN ELECTRIC LAMP SUPPORTED BY SAID CAMERA SUCH THAT A LIGHT THEREFROM IS VISIBLE TO THE CAMERA OPERATOR; A NORMALLY INACTUATED RELAXATION OSCILLATOR CIRCUIT ADAPTED, UPON ACTUATION THEREOF, FOR ENERGIZING SAID LAMP INTERMITTENTLY TO PRODUCE A FLASHING LIGHT, SAID OSCILLATOR CIRCUIT INCLUDING A CAPACITOR MEANS, A RESISTOR MEANS CONNECTED IN PARALLEL WITH SAID CAPACITOR MEANS, AND A BATTERY MEANS OPERATIVELY CONNECTED IN SAID CIRCUIT; AND A CONTROL CIRCUIT IN-
Claim 2
Dependent Claim
82 words
IN COMBINATION WITH A PHOTOGRAPHIC CAMERA, A FLASHING LIGHT LOW-SCENE-BRIGHTNESS SIGNAL DEVICE COMPRISING AN ELECTRIC LAMP SUPPORTED BY SAID CAMERA SUCH THAT A LIGHT THEREFROM IS VISIBLE TO THE CAMERA OPERATOR; A NORMALLY INACTUATED RELAXATION OSCILLATOR CIRCUIT ADAPTED, UPON ACTUATION THEREOF, FOR ENERGIZING SAID LAMP INTERMITTENTLY TO PRODUCE A FLASHING LIGHT, SAID OSCILLATOR CIRCUIT INCLUDING A CAPACITOR MEANS, A RESISTOR MEANS CONNECTED IN PARALLEL WITH SAID CAPACITOR MEANS, AND A BATTERY MEANS OPERATIVELY CONNECTED IN SAID CIRCUIT; AND A CONTROL CIRCUIT IN-
References Cited (Backward Citations)
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US1934726A
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US2894173A
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US2971432A
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US3003389A
Cited
US3143047A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-31 | 1969-08-02 | 1970-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-31 | 1973-08-02 | 1974-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-31 | 1977-08-02 | 1978-02-01 | $7700.00 | Window Closed / Lapsed |