US3157841A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable frequency oscillator amplitude stabilized bridge and self-derived referencevoltage
Assignee: RADIO FREQUENCY LAB Inc
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Filing: 1961-01-05
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Granted: 1964-11-17
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Expires: 1981-01-05
Abstract
No abstract record available.
Inventors
- 👤 Everett A Gilbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:28
CPC Classifications
H; H03; H03L; H03L5/00; H03B; H03B5/00; H03B5/08; H03B5/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
A STABILIZED A.C. POWER SUPPLY COMPRISING, (A) AN A.C. AMPLIFIER, (B) A RESISTANCE BRIDGE HAVING A CURRENT-DEPENDENT RESISTANCE ELEMENT FORMING ONE ARM THEREOF, (C) A TRANSFORMER HAVING A PRIMARY WINDING CONNECTED TO THE OUTPUT CIRCUIT OF THE AMPLIFIER, A FIRST SECONDARY WINDING CONNECTED TO THE INPUT TERMINALS OF SAID BRIDGE, AND A SECOND SECONDARY WINDING, (D) AN INDUCTANCE-CAPACITANCE NETWORK CONNECTED BETWEEN ONE OUTPUT TERMINAL OF SAID BRIDGE AND ONE INPUT TERMINAL OF THE AMPLIFIER, (E) MEANS ENERGIZED BY THE VOLTAGE DEVELOPED IN THE SAID SECOND SECONDARY WINDING AND PROVIDING AN A.C.
Claim 2
Dependent Claim
91 words
A STABILIZED A.C. POWER SUPPLY COMPRISING, (A) AN A.C. AMPLIFIER, (B) A RESISTANCE BRIDGE HAVING A CURRENT-DEPENDENT RESISTANCE ELEMENT FORMING ONE ARM THEREOF, (C) A TRANSFORMER HAVING A PRIMARY WINDING CONNECTED TO THE OUTPUT CIRCUIT OF THE AMPLIFIER, A FIRST SECONDARY WINDING CONNECTED TO THE INPUT TERMINALS OF SAID BRIDGE, AND A SECOND SECONDARY WINDING, (D) AN INDUCTANCE-CAPACITANCE NETWORK CONNECTED BETWEEN ONE OUTPUT TERMINAL OF SAID BRIDGE AND ONE INPUT TERMINAL OF THE AMPLIFIER, (E) MEANS ENERGIZED BY THE VOLTAGE DEVELOPED IN THE SAID SECOND SECONDARY WINDING AND PROVIDING AN A.C.
References Cited (Backward Citations)
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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) | 1967-11-17 | 1968-05-18 | 1968-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-17 | 1972-05-18 | 1972-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-17 | 1976-05-18 | 1976-11-17 | $7700.00 | Window Closed / Lapsed |