Patent US2090359A successfully refreshed from Google Patents.
Patent US3218909A successfully refreshed from Google Patents.
US3218909A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical ranging device using movable concentric coplanar detectors
Assignee: Individual
•
Filing: 1961-12-22
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Granted: 1965-11-23
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Expires: 1981-12-22
Abstract
No abstract record available.
Inventors
- 👤 Janice B Fain
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:31
CPC Classifications
G; G01; G01C; G01C3/00; G01C3/02; G01C3/06; G01C3/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
163 words
A RANGE FINDER FOR DETERMINING THE RANGE TO AN OBJECT WHICH EMANATES RAYS OF ENERGY COMPRISING A STATIONARY LENS FOR FOCUSING THE RAYS OF ENERGY FROM THE OBJECT TO AN IMAGE PLANE, SAID LENS HAVING AN OPTICAL AXIS AND A FOCAL LENGTH, A FIRST DETECTOR AND A SECOND DETECTOR, MEANS FOR POSITIONING THE FIRST DETECTOR SO THAT IT TRAVERSES THE OPTICAL AXIS AND FOR POSITIONING THE FIRST AND SECOND DETECTORS WITH RESECT TO ONE ANOTHER SO THAT THEY WILL BE CAPABLE OF BEING SIMULTANEOUSLY RESPONSIVE TO A SEPARATE BUNDLE OF RAYS, EACH DETECTOR HAVING AN OUTPUT PROPORTIONAL TO THE AMOUNT OF RAY ENERGY RESPECTIVELY RECEIVED THEREBY, AND MEANS FOR SPACING THE DETECTORS FROM THE LENS ALONG THE AXIS WHEREBY UPON SPACING THE DETECTORS AND THE LENS SUCH THAT THE RATIO OF THE OUTPUT OF THE FIRST DETECTOR TO THE OUTPUT OF THE SECOND DETECTOR IS AT A MAXIMUM THE RANGE FROM THE LENS TO THE OBJECT CAN BE FOUND BY APPLYING THE FORMULA
Claim 2
Dependent Claim
163 words
A RANGE FINDER FOR DETERMINING THE RANGE TO AN OBJECT WHICH EMANATES RAYS OF ENERGY COMPRISING A STATIONARY LENS FOR FOCUSING THE RAYS OF ENERGY FROM THE OBJECT TO AN IMAGE PLANE, SAID LENS HAVING AN OPTICAL AXIS AND A FOCAL LENGTH, A FIRST DETECTOR AND A SECOND DETECTOR, MEANS FOR POSITIONING THE FIRST DETECTOR SO THAT IT TRAVERSES THE OPTICAL AXIS AND FOR POSITIONING THE FIRST AND SECOND DETECTORS WITH RESECT TO ONE ANOTHER SO THAT THEY WILL BE CAPABLE OF BEING SIMULTANEOUSLY RESPONSIVE TO A SEPARATE BUNDLE OF RAYS, EACH DETECTOR HAVING AN OUTPUT PROPORTIONAL TO THE AMOUNT OF RAY ENERGY RESPECTIVELY RECEIVED THEREBY, AND MEANS FOR SPACING THE DETECTORS FROM THE LENS ALONG THE AXIS WHEREBY UPON SPACING THE DETECTORS AND THE LENS SUCH THAT THE RATIO OF THE OUTPUT OF THE FIRST DETECTOR TO THE OUTPUT OF THE SECOND DETECTOR IS AT A MAXIMUM THE RANGE FROM THE LENS TO THE OBJECT CAN BE FOUND BY APPLYING THE FORMULA
References Cited (Backward Citations)
US2134757A
Cited
GB479662A
Cited
US2999436A
Cited
US3041459A
Cited
US3017515A
Cited
US3054898A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-22 | 1969-05-24 | 1969-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-22 | 1973-05-24 | 1973-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-22 | 1977-05-24 | 1977-11-23 | $7700.00 | Window Closed / Lapsed |