US2796527A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for automatically determining the optimum exposure time in radiography
Assignee: US Philips Corp
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Filing: 1954-03-03
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Granted: 1957-06-18
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Expires: 1974-03-03
Abstract
No abstract record available.
Inventors
- 👤 Oosterkamp Wijbe Johannes
- 👤 Fransen Jacobus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:20
CPC Classifications
H; H05; H05G; H05G1/00; H05G1/08; H05G1/26; H05G1/30; H05G1/38; H05G1/42; H05G1/44; G; G01; G01J; G01J1/00; G01J1/42
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
148 words
APPARATUS FOR AUTOMATICALLY DETERMINED THE EXPOSURE TIME OF AN OBJECT IRRADIATED BY X-RADIATION COMPRISING MEANS RESPONSIVE TO X-RADIATION PASSING THROUGH THE OBJECT TO CONVERT THE SAME INTO AND ELECTRICAL CURRENT OF A MAGNITUDE PROPORTION TO THE INTENSITY OF RADIATION, SAID MEANS COMPRISING A PLURALITY EXCEEDING TWO OF INDIVIDUAL RADIATION-RESPONSIVE ELEMENTS COVERING A FIELD CORRESPONDING TO A CROSS-SECTION AREA OF THE OBJECT BEING IRRADIATED WITH EACH OF SAID ELEMENTS COVERING A DISCRETE PORTION OF SAID FIELD, MEANS TO LIMIT THE CURRENT PRODUCED BY EACH OF THE SAID RADIATION-RESPONSIVE ELEMENTS AFTER A TIME INTERVAL DEPENDENT UPON THE INTENSITY OF THE RADIATION IMPINING ON THE RADIATION-RESPONSIVE ELEMENTS TO A VALUE INDEPENDENT OF THE RADIATION INTENSITY, AND MEANS CONNECTING SAID RADIATION-RESPONSIVE ELEMENTS WITH A COMMON ELECTRICAL CONDITION RESPONSE DEVICE RESPONSIVE TO THE COLLECTIVE OUTPUTS OF SAID RADIATION-RESPONSIVE ELEMENTS TO INDICATE AND CONTROL THE TIME OF EXPOSURE OF SAID OBJECTS TO SAID X-RADIATION.
Claim 2
Dependent Claim
148 words
APPARATUS FOR AUTOMATICALLY DETERMINED THE EXPOSURE TIME OF AN OBJECT IRRADIATED BY X-RADIATION COMPRISING MEANS RESPONSIVE TO X-RADIATION PASSING THROUGH THE OBJECT TO CONVERT THE SAME INTO AND ELECTRICAL CURRENT OF A MAGNITUDE PROPORTION TO THE INTENSITY OF RADIATION, SAID MEANS COMPRISING A PLURALITY EXCEEDING TWO OF INDIVIDUAL RADIATION-RESPONSIVE ELEMENTS COVERING A FIELD CORRESPONDING TO A CROSS-SECTION AREA OF THE OBJECT BEING IRRADIATED WITH EACH OF SAID ELEMENTS COVERING A DISCRETE PORTION OF SAID FIELD, MEANS TO LIMIT THE CURRENT PRODUCED BY EACH OF THE SAID RADIATION-RESPONSIVE ELEMENTS AFTER A TIME INTERVAL DEPENDENT UPON THE INTENSITY OF THE RADIATION IMPINING ON THE RADIATION-RESPONSIVE ELEMENTS TO A VALUE INDEPENDENT OF THE RADIATION INTENSITY, AND MEANS CONNECTING SAID RADIATION-RESPONSIVE ELEMENTS WITH A COMMON ELECTRICAL CONDITION RESPONSE DEVICE RESPONSIVE TO THE COLLECTIVE OUTPUTS OF SAID RADIATION-RESPONSIVE ELEMENTS TO INDICATE AND CONTROL THE TIME OF EXPOSURE OF SAID OBJECTS TO SAID X-RADIATION.
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) | 1960-06-17 | 1960-12-17 | 1961-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-06-17 | 1964-12-17 | 1965-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-06-17 | 1968-12-17 | 1969-06-18 | $7700.00 | Window Closed / Lapsed |