Patent US3216216A successfully refreshed from Google Patents.
Patent US3324355A successfully refreshed from Google Patents.
US3324355A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control circuit for solid state rectifier
Assignee: —
•
Filing: —
•
Granted: 1967-06-06
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Expires: 1984-06-06
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:06
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/51; H03K17/56; H03K17/72; H03K17/725; H02; H02M; H02M1/00; H02M1/08; H02M1/081
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
136 words
APPARATUS COMPRISING AN ALTERNATING CURRENT INPUT SIGNAL SOURCE, A PAIR OF ZENER DIODES HAVING OPPOSITE TERMINAL REGIONS CONNECTED TOGETHER, A SILICON CONTROLLED RECTIFIER SWITCH HAVING A GATE ELECTRODE, AN INPUT CIRCUIT CONNECTING SAID ZENER DIODES IN SERIES WITH SAID INPUT SIGNAL SOURCE AND SAID GATE ELECTRODE TO DETERMINE THE LEVEL OF FIRING VOLTAGE, SAID INPUT CIRCUIT INCLUDING A RESISTOR AND CAPACITOR CONNECTED ACROSS SAID INPUT SIGNAL SOURCE AND A RESISTOR CONNECTED IN PARALLEL WITH SAID CAPACITOR, SAID CAPACITOR PREVENTING SAID RECTIFIER SWITCH FROM CUTTING OFF IN RESPONSE TO SAID INPUT SIGNAL VARYING IN MAGNITUDE WITHIN A PREDETERMINED RANGE BELOW A PREDETERMINED LEVEL, AN ALTERNATING CURRENT EXCITATION SOURCE, A RELAY COIL, MEANS FOR CONNECTING SAID SILICON CONTROLLED RECTIFIER SWITCH IN SERIES WITH SAID RELAY COIL AND SAID EXCITATION SOURCE, AND A CAPACITOR CONNECTED ACROSS SAID RELAY COIL.
Claim 2
Dependent Claim
136 words
APPARATUS COMPRISING AN ALTERNATING CURRENT INPUT SIGNAL SOURCE, A PAIR OF ZENER DIODES HAVING OPPOSITE TERMINAL REGIONS CONNECTED TOGETHER, A SILICON CONTROLLED RECTIFIER SWITCH HAVING A GATE ELECTRODE, AN INPUT CIRCUIT CONNECTING SAID ZENER DIODES IN SERIES WITH SAID INPUT SIGNAL SOURCE AND SAID GATE ELECTRODE TO DETERMINE THE LEVEL OF FIRING VOLTAGE, SAID INPUT CIRCUIT INCLUDING A RESISTOR AND CAPACITOR CONNECTED ACROSS SAID INPUT SIGNAL SOURCE AND A RESISTOR CONNECTED IN PARALLEL WITH SAID CAPACITOR, SAID CAPACITOR PREVENTING SAID RECTIFIER SWITCH FROM CUTTING OFF IN RESPONSE TO SAID INPUT SIGNAL VARYING IN MAGNITUDE WITHIN A PREDETERMINED RANGE BELOW A PREDETERMINED LEVEL, AN ALTERNATING CURRENT EXCITATION SOURCE, A RELAY COIL, MEANS FOR CONNECTING SAID SILICON CONTROLLED RECTIFIER SWITCH IN SERIES WITH SAID RELAY COIL AND SAID EXCITATION SOURCE, AND A CAPACITOR CONNECTED ACROSS SAID RELAY COIL.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-06-05 | 1970-12-05 | 1971-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-06-05 | 1974-12-05 | 1975-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-06-05 | 1978-12-05 | 1979-06-06 | $7700.00 | Window Closed / Lapsed |