Patent US3350607A successfully refreshed from Google Patents.
US3350607A
Expired / Lapsed
US
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Cathode loaded overload protection circuit
Assignee: ZF International UK Ltd
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Filing: 1965-03-15
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Granted: 1967-10-31
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Expires: 1985-03-15
Abstract
No abstract record available.
Inventors
- 👤 Jones Peter David
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:15
CPC Classifications
H; H02; H02H; H02H7/00; H02H7/08; H02H7/0811; H02H3/00; H02H3/08; H02H3/087; H02P; H02P1/00; H02P1/16; H02P1/18; H02P1/20; H02P7/00; H02P7/06; H02P7/18; H02P7/24; H02P7/28; H02P7/285; H02P7/292; H02P7/295
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
149 words
D.C. OVERLOAD PROTECTION CIRCUIT COMPRISING IN COMBINATION FIRST AND SECOND TERMINALS FOR CONNECTION TO A D.C. SOURCE SO AS TO BE OF POSITIVE AND NEGATIVE POLARITY RESPECTIVELY, A SWITCHABLE RECTIFIER HAVING ITS ANODE CONNECTED TO THE FIRST TERMINAL AND ITS CATHODE CONNECTED TO THE SECOND TERMINAL THROUGH A FIRST RESISTOR IN SERIES WITH A LOAD TO BE PROTECTED, MEANS FOR APPLYING POSITIVE PULSES BETWEEN THE GATE AND CATHODE OF THE SWITCHABLE RECTIFIER TO SWITCH IT ON, AND MEANS CONNECTING THE GATE OF THE SWITCHABLE RECTIFIER TO A POINT INTERMEDIATE THE FIRST RESWITCHABLE RECTIFIER TO A POINT INTERMEDIATE THE FIRST REABLE RECTIFIER IS CONDUCTING, THE ARRANGEMENT BEING SUCH THAT WHEN THE SWITCHABLE RECTIFIER IS CONDUCTING ITS GATE WILL BE AT A NEGATIVE POTENTIAL RELATIVE TO ITS CATHODE BUT THIS POTENTIAL WILL BE INSUFFICIENT TO SWITCH OFF THE SWITCHABLE RECTIFIER UNLESS THE CURRENT FLOWING IN THE LOAD EXCEEDS A PREDETERMINED VALUE.
Claim 2
Dependent Claim
149 words
D.C. OVERLOAD PROTECTION CIRCUIT COMPRISING IN COMBINATION FIRST AND SECOND TERMINALS FOR CONNECTION TO A D.C. SOURCE SO AS TO BE OF POSITIVE AND NEGATIVE POLARITY RESPECTIVELY, A SWITCHABLE RECTIFIER HAVING ITS ANODE CONNECTED TO THE FIRST TERMINAL AND ITS CATHODE CONNECTED TO THE SECOND TERMINAL THROUGH A FIRST RESISTOR IN SERIES WITH A LOAD TO BE PROTECTED, MEANS FOR APPLYING POSITIVE PULSES BETWEEN THE GATE AND CATHODE OF THE SWITCHABLE RECTIFIER TO SWITCH IT ON, AND MEANS CONNECTING THE GATE OF THE SWITCHABLE RECTIFIER TO A POINT INTERMEDIATE THE FIRST RESWITCHABLE RECTIFIER TO A POINT INTERMEDIATE THE FIRST REABLE RECTIFIER IS CONDUCTING, THE ARRANGEMENT BEING SUCH THAT WHEN THE SWITCHABLE RECTIFIER IS CONDUCTING ITS GATE WILL BE AT A NEGATIVE POTENTIAL RELATIVE TO ITS CATHODE BUT THIS POTENTIAL WILL BE INSUFFICIENT TO SWITCH OFF THE SWITCHABLE RECTIFIER UNLESS THE CURRENT FLOWING IN THE LOAD EXCEEDS A PREDETERMINED VALUE.
References Cited (Backward Citations)
US3195033A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-10-30 | 1971-05-01 | 1971-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-30 | 1975-05-01 | 1975-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-30 | 1979-05-01 | 1979-10-31 | $7700.00 | Window Closed / Lapsed |