Patent US3189745A successfully refreshed from Google Patents.
US3189745A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photo-electric sensing circuit
Assignee: Lanteris Space LLC
•
Filing: 1961-10-27
•
Granted: 1965-06-15
•
Expires: 1981-10-27
Abstract
No abstract record available.
Inventors
- 👤 Joseph G A Van Reymersdal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:49
CPC Classifications
G; G06; G06K; G06K7/00; G06K7/10; G06K7/10544; G06K7/10821; G06K7/10851; G06F; G06F3/00; G06F3/06; G06F3/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
163 words
A PHOTO-ELECTRIC SENSING CIRCUIT COMPRISING A FIRST AMPLIFIER STAGE INCLUDING AN INPUT TERMINAL AND A LOAD IMPEDANCE, A PHOTODIODE COUPLED TO SAID INPUT TERMINAL FOR CONTROLLING THE MAGITUDE OF THE SIGNAL APPEARING ACROSS SAID LOAD IMPEDANCE AS A FUNCTION OF THE INTENSITY OF THE ILLUMINATION OF SAID PHOTODIODE, SIGNAL STORAGE MEANS COUPLED TO SAID LOAD IMPEDANCE AND ADAPTED TO PROVIDE AND MAINTAIN AN OUTPUT SIGNAL HAVING A MAGNITUDE SUBSTANTIALLY PROPORTIONAL TO A PREDETERMINED FRACTION OF THE MAGNITUDE OF THE SIGNAL APPEARING ACROSS SAID LOAD IMPEDANCE IN RESPONSE TO ONE EXTREME OF ILLUMINATION OF SAID PHOTODIODE, A SECOND AMPLIFIER STAGE, MEANS COUPLING SAID LOAD IMPEDANCE AND SAID STORAGE MEANS TO THE INPUT OF SAID SECOND AMPLIFIER STAGE TO PROVIDE A NET INPUT SIGNAL TO SAID SECOND AMPLIFIER STAGE WHICH IS PROPORTIONAL TO THE DIFFERENCE BETWEEN THE INSTANTANEOUS SIGNAL APPEARING CROSS SAID LOAD IMPEDANCE AND THE SIGNAL PROVIDED BY SAID SIGNAL STORAGE MEANS, AND MEANS FOR DERIVING AN OUTPUT SIGNAL FROM SAID SECOND AMPLIFIER STAGE.
Claim 2
Dependent Claim
163 words
A PHOTO-ELECTRIC SENSING CIRCUIT COMPRISING A FIRST AMPLIFIER STAGE INCLUDING AN INPUT TERMINAL AND A LOAD IMPEDANCE, A PHOTODIODE COUPLED TO SAID INPUT TERMINAL FOR CONTROLLING THE MAGITUDE OF THE SIGNAL APPEARING ACROSS SAID LOAD IMPEDANCE AS A FUNCTION OF THE INTENSITY OF THE ILLUMINATION OF SAID PHOTODIODE, SIGNAL STORAGE MEANS COUPLED TO SAID LOAD IMPEDANCE AND ADAPTED TO PROVIDE AND MAINTAIN AN OUTPUT SIGNAL HAVING A MAGNITUDE SUBSTANTIALLY PROPORTIONAL TO A PREDETERMINED FRACTION OF THE MAGNITUDE OF THE SIGNAL APPEARING ACROSS SAID LOAD IMPEDANCE IN RESPONSE TO ONE EXTREME OF ILLUMINATION OF SAID PHOTODIODE, A SECOND AMPLIFIER STAGE, MEANS COUPLING SAID LOAD IMPEDANCE AND SAID STORAGE MEANS TO THE INPUT OF SAID SECOND AMPLIFIER STAGE TO PROVIDE A NET INPUT SIGNAL TO SAID SECOND AMPLIFIER STAGE WHICH IS PROPORTIONAL TO THE DIFFERENCE BETWEEN THE INSTANTANEOUS SIGNAL APPEARING CROSS SAID LOAD IMPEDANCE AND THE SIGNAL PROVIDED BY SAID SIGNAL STORAGE MEANS, AND MEANS FOR DERIVING AN OUTPUT SIGNAL FROM SAID SECOND AMPLIFIER STAGE.
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) | 1968-06-14 | 1968-12-14 | 1969-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-14 | 1972-12-14 | 1973-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-14 | 1976-12-14 | 1977-06-15 | $7700.00 | Window Closed / Lapsed |