US3588696A
Expired / Lapsed
US
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Devices for monitoring a physical quantity
Assignee: Individual
•
Filing: 1968-10-18
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Granted: 1971-06-28
•
Expires: 1988-10-18
Abstract
Abstract A DEVICE FOR MONITORING A PHYSICAL QUANTITY BY PRODUCING, ON THE SCREEN OF A CATHODE-RAY TUBE, A TRACE COMPOSED OF A SUCCESSION OF LIGHT SPOTS FORMING A SURVE REPRESENTING VARIATIONS IN THE VALUE OF THE QUANTITY BEING MONITORED, DISPOSING IN FRONT OF THE SCREEN AN OPAQUE MASK PROVIDED WITH A SLIT WHOSE FORM CORRESPONDS TO THE PATH ALONG WHICH THE TRACE LIES WHEN THE PHYSICAL QUANTITY HAS THE DESIRED VALUE AND WHOSE WIDTH IS PROPORTIONAL TO THE ACCEPTABLE VARIATIONS IN THE VALUE OF THE QUANTITY, AND DISPOSING A PHOTOELECTRIC CELL IN FRONT OF THE MASK FOR DETECTING THE LIGHT SPOTS WHENEVER THEY APPEAR WITHIN THE OPENING DEFINED BY THE SLIT.
Inventors
- 👤 Jean Solvay
- 👤 Henri Solvay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:22
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/24; A61B5/316; A61B5/318; A61B5/339; G; G01; G01R; G01R13/00; G01R13/20; G01R13/208; G01R13/22; G01R13/32; G08; G08B; G08B23/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1974-06-27 | 1974-12-27 | 1975-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-27 | 1978-12-27 | 1979-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-27 | 1982-12-27 | 1983-06-28 | $7700.00 | Window Closed / Lapsed |