US3315078A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical feedback stabilizing circuit for a voltage source having a high internal resistance
Assignee: US Philips Corp
•
Filing: 1963-10-11
•
Granted: 1967-04-18
•
Expires: 1983-10-11
Abstract
No abstract record available.
Inventors
- 👤 Deelman Gerardus Jacobus
- 👤 Schellekens Alphonsus Henricus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:43
CPC Classifications
G; G05; G05F; G05F1/00; G05F1/10; G05F1/625; G05F1/63; H; H04; H04B; H04B15/00; H04B15/005; H04N; H04N5/00; H04N5/63
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
A CIRCUIT FOR REGULATING LOAD VOLTAGE COMPRISING, INPUT TERMINALS CONNECTED TO A VOLTAGE SOURCE HAVING A HIGH INTERNAL IMPEDANCE, A VARIABLE ELECTRICAL LOAD TO BE SUPPLIED FROM SAID VOLTAGE SOURCE, A LIGHT-RADIATING ELEMENT, A PHOTOSENSITIVE RESISTOR, AND MEANS CONNECTING SAID LOAD, SAID LIGHT-RADIATING ELEMENT AND SAID PHOTOSENSITIVE RESISTOR IN SERIES CIRCUIT ACROSS SAID INPUT TERMINALS, SAID PHOTOSENSITIVE RESISTOR BEING POSITIONED TO RECEIVE LIGHT EXCLUSIVELY FROM SAID LIGHT-RADIATING ELEMENT AND BEING RESPONSIVE THERETO SO THAT A GIVEN VARIATION IN THE LOAD IMPEDANCE PRODUCES A CHANGE IN THE CURRENT FLOWING IN SAID SERIES CIRCUIT WHICH CAUSES THE INTENSITY OF LIGHT RECEIVED BY SAID PHOTOSENSITIVE RESISTOR TO VARY IN A SENSE AND IN AN AMOUNT SUFFICIENT TO VARY THE RESISTANCE THEREOF TO MAINTAIN THE VOLTAGE ACROSS SAID LOAD SUBSTANTIALLY CONSTANT.
Claim 2
Dependent Claim
127 words
A CIRCUIT FOR REGULATING LOAD VOLTAGE COMPRISING, INPUT TERMINALS CONNECTED TO A VOLTAGE SOURCE HAVING A HIGH INTERNAL IMPEDANCE, A VARIABLE ELECTRICAL LOAD TO BE SUPPLIED FROM SAID VOLTAGE SOURCE, A LIGHT-RADIATING ELEMENT, A PHOTOSENSITIVE RESISTOR, AND MEANS CONNECTING SAID LOAD, SAID LIGHT-RADIATING ELEMENT AND SAID PHOTOSENSITIVE RESISTOR IN SERIES CIRCUIT ACROSS SAID INPUT TERMINALS, SAID PHOTOSENSITIVE RESISTOR BEING POSITIONED TO RECEIVE LIGHT EXCLUSIVELY FROM SAID LIGHT-RADIATING ELEMENT AND BEING RESPONSIVE THERETO SO THAT A GIVEN VARIATION IN THE LOAD IMPEDANCE PRODUCES A CHANGE IN THE CURRENT FLOWING IN SAID SERIES CIRCUIT WHICH CAUSES THE INTENSITY OF LIGHT RECEIVED BY SAID PHOTOSENSITIVE RESISTOR TO VARY IN A SENSE AND IN AN AMOUNT SUFFICIENT TO VARY THE RESISTANCE THEREOF TO MAINTAIN THE VOLTAGE ACROSS SAID LOAD SUBSTANTIALLY CONSTANT.
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) | 1970-04-17 | 1970-10-17 | 1971-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-04-17 | 1974-10-17 | 1975-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-04-17 | 1978-10-17 | 1979-04-18 | $7700.00 | Window Closed / Lapsed |