Patent US4282237A successfully refreshed from Google Patents.
Patent US3149245A successfully refreshed from Google Patents.
US3149245A
Expired / Lapsed
US
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Circuit for producing current pulses having overshoot and undershoot
Assignee: AT&T Inc
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Filing: 1960-11-07
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Granted: 1964-09-15
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Expires: 1980-11-07
Abstract
No abstract record available.
Inventors
- 👤 Clare E Barnes
- 👤 Robert V Goordman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:58
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/02; H03K3/35; H03K3/352; H03K17/00; H03K17/04; H03K17/041; H03K17/04113
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
174 words
A CIRCUIT FOR PRODUCING LOAD CURRENT PULSES HAVING SHORT RISE TIMES TOGETHER WITH A PREDETERMINED AMOUNT OF OVERSHOOT AND UNDERSHOOT ON THE LEADING AND TRAILING EDGE RESPECTIVELY OF EACH PULSE, A SOURCE HAVING A POTENTIAL E WITH RESPECT TO GROUND, A SWITCH HAVING TWO CONTACTS ONE OF WHICH IS CONNECTED TO SAID POTENTIAL E, AN INDUCTIVE LOAD HAVING TWO TERMINALS ONE OF WHICH IS GROUNDED, A DIODE HAVING AN ANODE CONNECTED TO THE OTHER CONTACT OF SAID SWITCH AND A CATHODE CONNECTED TO THE UNGROUNDED TERMINAL OF SAID LOAD, A STEP-UP TRANSFORMER HAVING A PRIMARY AND A SECONDARY WINDING AND A TURNS RATIO N, A FIRST CONDENSER INTERCONNECTING ONE SIDE OF SAID SECONDARY AND THE UNGROUNDED TERMINAL OF SAID LOAD WITH THE OTHER SIDE OF SAID SECONDARY BEING GROUNDED, A SECOND CONDENSER CONNECTED BETWEEN GROUND AND ONE SIDE OF SAID PRIMARY, A RESISTOR CONNECTED BETWEEN THE OTHER SIDE OF SAID PRIMARY AND SAID SECOND CONTACT OF SAID SWITCH FOR CONTROLLING THE PEAK CURRENT PRODUCED IN SAID LOAD BY THE SECONDARY AS SAID SWITCH IS
Claim 2
Dependent Claim
174 words
A CIRCUIT FOR PRODUCING LOAD CURRENT PULSES HAVING SHORT RISE TIMES TOGETHER WITH A PREDETERMINED AMOUNT OF OVERSHOOT AND UNDERSHOOT ON THE LEADING AND TRAILING EDGE RESPECTIVELY OF EACH PULSE, A SOURCE HAVING A POTENTIAL E WITH RESPECT TO GROUND, A SWITCH HAVING TWO CONTACTS ONE OF WHICH IS CONNECTED TO SAID POTENTIAL E, AN INDUCTIVE LOAD HAVING TWO TERMINALS ONE OF WHICH IS GROUNDED, A DIODE HAVING AN ANODE CONNECTED TO THE OTHER CONTACT OF SAID SWITCH AND A CATHODE CONNECTED TO THE UNGROUNDED TERMINAL OF SAID LOAD, A STEP-UP TRANSFORMER HAVING A PRIMARY AND A SECONDARY WINDING AND A TURNS RATIO N, A FIRST CONDENSER INTERCONNECTING ONE SIDE OF SAID SECONDARY AND THE UNGROUNDED TERMINAL OF SAID LOAD WITH THE OTHER SIDE OF SAID SECONDARY BEING GROUNDED, A SECOND CONDENSER CONNECTED BETWEEN GROUND AND ONE SIDE OF SAID PRIMARY, A RESISTOR CONNECTED BETWEEN THE OTHER SIDE OF SAID PRIMARY AND SAID SECOND CONTACT OF SAID SWITCH FOR CONTROLLING THE PEAK CURRENT PRODUCED IN SAID LOAD BY THE SECONDARY AS SAID SWITCH IS
References Cited (Backward Citations)
US2941125A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-09-15 | 1968-03-16 | 1968-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-15 | 1972-03-16 | 1972-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-15 | 1976-03-16 | 1976-09-15 | $7700.00 | Window Closed / Lapsed |