US3248642A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Precision voltage source
Assignee: Individual
•
Filing: 1962-05-22
•
Granted: 1966-04-26
•
Expires: 1982-05-22
Abstract
No abstract record available.
Inventors
- 👤 Raymond S Rothschild
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:51
CPC Classifications
G; G05; G05F; G05F1/00; G05F1/10; G05F1/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
A PRECISION VOLTAGE SOURCE COMPRISING A SIGNAL CIRCUIT, A FIRST AMPLIFIER HAVING AN INPUT AN A.C. OUTPUT, AN INPUT-SIGNAL-MODIFYING CIRCUIT MEANS CONNECTED BETWEEN SAID SIGNAL CIRCUIT AND SAID INPUT AND COMPRISING AN IMPEDANCE WHOSE VALUE VARIES IN ACCORDANCE WITH THE LIGHT IMPINGING THEREON AND THEREBY VARIES THE PROPORTION OF THE SIGNAL FED TO SAID INPUT, LIGHT MEANS OPERATIVELY ASSOCIATED WITH SAID IMPEDANCE, AND CONTROL MEANS OPERATIVELY CONNECTED BETWEEN SAID OUTPUT AND SAID LIGHT MEANS FOR ENERGIZING THE LATTER IN ACCORDANCE WITH THE MAGNITUDE OF SAID OUTPUT, SAID CONTROL MEANS COMPRISING AN AMPLIFIER HAVING A CONTROL ELEMENT CONNECTED TO SAID OUTPUT VIA A CIRCUIT PART WHICH CONDUCTS ONLY WHEN THE VOLTAGE OF SAID OUTPUT EXCEEDS A PREDETERMINED VALUE.
Claim 2
Dependent Claim
117 words
A PRECISION VOLTAGE SOURCE COMPRISING A SIGNAL CIRCUIT, A FIRST AMPLIFIER HAVING AN INPUT AN A.C. OUTPUT, AN INPUT-SIGNAL-MODIFYING CIRCUIT MEANS CONNECTED BETWEEN SAID SIGNAL CIRCUIT AND SAID INPUT AND COMPRISING AN IMPEDANCE WHOSE VALUE VARIES IN ACCORDANCE WITH THE LIGHT IMPINGING THEREON AND THEREBY VARIES THE PROPORTION OF THE SIGNAL FED TO SAID INPUT, LIGHT MEANS OPERATIVELY ASSOCIATED WITH SAID IMPEDANCE, AND CONTROL MEANS OPERATIVELY CONNECTED BETWEEN SAID OUTPUT AND SAID LIGHT MEANS FOR ENERGIZING THE LATTER IN ACCORDANCE WITH THE MAGNITUDE OF SAID OUTPUT, SAID CONTROL MEANS COMPRISING AN AMPLIFIER HAVING A CONTROL ELEMENT CONNECTED TO SAID OUTPUT VIA A CIRCUIT PART WHICH CONDUCTS ONLY WHEN THE VOLTAGE OF SAID OUTPUT EXCEEDS A PREDETERMINED VALUE.
References Cited (Backward Citations)
US2984780A
Cited
US2984779A
Cited
US3020488A
Cited
US3040241A
Cited
US3070743A
Cited
US3082381A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-04-25 | 1969-10-25 | 1970-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-25 | 1973-10-25 | 1974-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-25 | 1977-10-25 | 1978-04-26 | $7700.00 | Window Closed / Lapsed |