Patent US4202055A successfully refreshed from Google Patents.
US3217592A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Checking device for optical altimeters and similar devices
Assignee: Safran Aircraft Engines SAS
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Filing: 1962-07-17
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Granted: 1965-11-16
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Expires: 1982-07-17
Abstract
No abstract record available.
Inventors
- 👤 Braun Adolf
- 👤 Prade Jean Charles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:40
CPC Classifications
G; G01; G01C; G01C3/00; G01C3/10; G01C25/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
IN AN ELECTRO-OPTICAL TELEMETRIC APPARATUS OF THE KIND COMPRISING A LIGHT-EMITTING SOURCE AND A PHOTO-ELECTRIC CELL SPACED FROM EACH OTHER AND MUTUALLY ORIENTED TO FORM THE BASE FOR AN OPTICAL TRIANGULATION MEASUREMENT, AND A SIGNALLING SYSTEM UNDER THE CONTROL OF SAID PHOTOELECTRIC CELL INCLUDING AN OPERATIVENESS CHECK DEVICE, SAID DEVICE COMPRISING IN COMBINATION, FIRST AUXILIARY MEANS OPTICALLY COUPLED TO SAID SOURCE FOR COLLECTING A FRACTION OF THE LIGHT EMITTED THEREBY FOR GENERATING AND TRANSMITTING A SIGNAL CORRESPONDING TO SAID FRACTION, SECOND AUXILIARY MEANS COUPLED TO SAID CELL FOR RECEIVING SAID SIGNAL AND FOR PROJECTING A BEAM OF LIGHT INTO SAID CELL TO ENERGIZE THE SAME IN ACCORDANCE WITH SAID SIGNAL, AND CHOP-
Claim 2
Dependent Claim
112 words
IN AN ELECTRO-OPTICAL TELEMETRIC APPARATUS OF THE KIND COMPRISING A LIGHT-EMITTING SOURCE AND A PHOTO-ELECTRIC CELL SPACED FROM EACH OTHER AND MUTUALLY ORIENTED TO FORM THE BASE FOR AN OPTICAL TRIANGULATION MEASUREMENT, AND A SIGNALLING SYSTEM UNDER THE CONTROL OF SAID PHOTOELECTRIC CELL INCLUDING AN OPERATIVENESS CHECK DEVICE, SAID DEVICE COMPRISING IN COMBINATION, FIRST AUXILIARY MEANS OPTICALLY COUPLED TO SAID SOURCE FOR COLLECTING A FRACTION OF THE LIGHT EMITTED THEREBY FOR GENERATING AND TRANSMITTING A SIGNAL CORRESPONDING TO SAID FRACTION, SECOND AUXILIARY MEANS COUPLED TO SAID CELL FOR RECEIVING SAID SIGNAL AND FOR PROJECTING A BEAM OF LIGHT INTO SAID CELL TO ENERGIZE THE SAME IN ACCORDANCE WITH SAID SIGNAL, AND CHOP-
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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) | 1968-11-15 | 1969-05-17 | 1969-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-15 | 1973-05-17 | 1973-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-15 | 1977-05-17 | 1977-11-16 | $7700.00 | Window Closed / Lapsed |