Patent US3243594A successfully refreshed from Google Patents.
US3243594A
Expired / Lapsed
US
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Electro-optical positioning system
Assignee: GTE Sylvania Inc
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Filing: 1962-07-09
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Granted: 1966-03-29
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Expires: 1982-07-09
Abstract
No abstract record available.
Inventors
- 👤 Robert W Lovell
- 👤 Malcolm F Macdonald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:18
CPC Classifications
G; G01; G01R; G01R29/00; G01R29/08; G01R29/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
AN ELECTRO-OPTICAL SYSTEM FOR POSITIONING A SURFACE COMPRISING, LIGHT-SENSITIVE ELEMENT MOUNTED ON SAID SURFACE AND CABLE OF PRODUCING AN OUTPUT CURRENT WHOSE MAGNITUDE IS A LINEAR FUNCTION OF THE AREA OF THE ELEMENT ILLUMINATED, FIRST AND SECOND LIGHT SOURCES EACH ARRANGED TO ILLUMINATE A PREDETERMINED AREA OF SAID LIGHT SENSITIVE ELEMENT, FIRST AND SECOND MEANS ASSOCIATED WITH EACH LIGHT SOURCE FOR RESPECTIVELY CHOPPING THE LIGHT FROM SAID FIRST AND SAID SECOND LIGHT SOURCE AT FREQUENCIES WHICH ARE HARMONICALLY INDEPENDENT, AND MEANS CONNECTED TO SAID LIGHT-SENSITIVE ELEMENT AND RESPONSIVE TO THE OUTPUT CURRENT THEREFROM TO PRODUCE AN ERROR SIGNAL WHEN SAID SURFACE IS DISPLACED FROM A PREDETERMINED POSITION.
Claim 2
Dependent Claim
107 words
AN ELECTRO-OPTICAL SYSTEM FOR POSITIONING A SURFACE COMPRISING, LIGHT-SENSITIVE ELEMENT MOUNTED ON SAID SURFACE AND CABLE OF PRODUCING AN OUTPUT CURRENT WHOSE MAGNITUDE IS A LINEAR FUNCTION OF THE AREA OF THE ELEMENT ILLUMINATED, FIRST AND SECOND LIGHT SOURCES EACH ARRANGED TO ILLUMINATE A PREDETERMINED AREA OF SAID LIGHT SENSITIVE ELEMENT, FIRST AND SECOND MEANS ASSOCIATED WITH EACH LIGHT SOURCE FOR RESPECTIVELY CHOPPING THE LIGHT FROM SAID FIRST AND SAID SECOND LIGHT SOURCE AT FREQUENCIES WHICH ARE HARMONICALLY INDEPENDENT, AND MEANS CONNECTED TO SAID LIGHT-SENSITIVE ELEMENT AND RESPONSIVE TO THE OUTPUT CURRENT THEREFROM TO PRODUCE AN ERROR SIGNAL WHEN SAID SURFACE IS DISPLACED FROM A PREDETERMINED POSITION.
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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) | 1969-03-28 | 1969-09-27 | 1970-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-28 | 1973-09-27 | 1974-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-28 | 1977-09-27 | 1978-03-29 | $7700.00 | Window Closed / Lapsed |