US3433962A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Direct current amplifier employing photoelectric chopper with incandescent drivers
Assignee: Clariex Corp
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Filing: 1966-10-14
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Granted: 1969-03-18
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Expires: 1986-10-14
Abstract
No abstract record available.
Inventors
- 👤 Benjamin B Neiger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:25
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/38; H03F3/387
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
A DIRECT CURRENT AMPLIFIER, COMPRISING: INPUT TERMINALS FOR RECEIVING DIRECT CURRENT OF VERY SMALL MAGNITUDE FROM AN EXTERNAL SOURCE; A PAIR OF INCANDESCENT LAMPS HAVING RESISTIVE FILAMENTS AND RATED FOR CARRYING CURRENT OF A CERTAIN MAGNITUDE; MEANS FOR APPLYING MOMENTARY CURRENT PULSES TO THE LAMPS TO LIGHT THE SAME ALTENATELY AND MOMENTARILY, SAID CURRENT PULSES HAVING MAGNITUDES SEVERAL TIMES LARGER THAN SAID CERTAIN MAGNITUDE; AND A PAIR OF PHOTOELECTRIC CELLS CONNECTED IN CIRCUIT WITH THE INPUT TERMINALS AND DISPOSED FOR ILLUMINATION RESPECTIVELY AND ALTERNATELY BY SAID LAMPS TO PRODUCE A TRAIN OF DIRECT CURRENT PULSES WHICH CAN BE AMPLIFIED.
Claim 2
Dependent Claim
99 words
A DIRECT CURRENT AMPLIFIER, COMPRISING: INPUT TERMINALS FOR RECEIVING DIRECT CURRENT OF VERY SMALL MAGNITUDE FROM AN EXTERNAL SOURCE; A PAIR OF INCANDESCENT LAMPS HAVING RESISTIVE FILAMENTS AND RATED FOR CARRYING CURRENT OF A CERTAIN MAGNITUDE; MEANS FOR APPLYING MOMENTARY CURRENT PULSES TO THE LAMPS TO LIGHT THE SAME ALTENATELY AND MOMENTARILY, SAID CURRENT PULSES HAVING MAGNITUDES SEVERAL TIMES LARGER THAN SAID CERTAIN MAGNITUDE; AND A PAIR OF PHOTOELECTRIC CELLS CONNECTED IN CIRCUIT WITH THE INPUT TERMINALS AND DISPOSED FOR ILLUMINATION RESPECTIVELY AND ALTERNATELY BY SAID LAMPS TO PRODUCE A TRAIN OF DIRECT CURRENT PULSES WHICH CAN BE AMPLIFIED.
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) | 1972-03-17 | 1972-09-16 | 1973-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-17 | 1976-09-16 | 1977-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-17 | 1980-09-16 | 1981-03-18 | $7700.00 | Window Closed / Lapsed |