US3268776A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Driver for pulsing inductive loads
Assignee: AT&T Inc
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Filing: 1962-11-21
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Granted: 1966-08-23
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Expires: 1982-11-21
Abstract
No abstract record available.
Inventors
- 👤 Robert A Reed
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:16
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/51; H03K17/56; H03K17/72; H03K17/73
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
166 words
A CIRCUIT FOR DRIVING CURRENT THROUGH AN INDUCTIVE LOAD, SAID CIRCUIT COMPRISING A FIRST VOTAGE SOURCE, A SECOND VOLTAGE SOURCE, A FIRST PATH SERIALLY CONNECTING SAID INDUCITIVE LOAD AND ONE OF SAID SOURCES, SAID FIRST PATH COMPRISING A FIRST NORMALLY DISABLED GATE AND MEANS TO ISOLATE SAID FIRST PATH FROM SAID LOAD WHEN THE VOLTAGE ACROSS SAID LOAD EXCEEDS A PREDETERMINED LEVEL, A SECOND PATH SERIALLY CONNECTING SAID INDUCTIVE LOAD AND SAID SOURCES IN AN ADDITIVE SENSE, SAID SECOND PATH COMPRISING A SECOND NORMALLY DISABLED GATE DISTINCT FROM SAID FIRST GATE, A SERIALLY CONNECTED IMPEDANCE MEANS, AND MEANS RESPONSIVE TO AN INPUT SIGNAL TO ENABLE SAID SECOND GATE ONLY FOR AN INTERVAL TO ALLOW SAID INDUCTIVE LOAD CURRENT TO REACH SUBSTANTIALLY THE STEADY STATE VALUE OF THE INDUCTIVE LOAD CURRENT PRODUCED WHEN ONLY SAID FIRST PATH IS CONDUCTIVE, AND MEANS TO APPLY AN INPUT SIGNAL TO SAID FIRST GATE IN SAID FIRST PATH AND TO SAID MEANS RESPONSIVE TO AN INPUT SIGNAL IN SAID SECOND PATH.
Claim 2
Dependent Claim
166 words
A CIRCUIT FOR DRIVING CURRENT THROUGH AN INDUCTIVE LOAD, SAID CIRCUIT COMPRISING A FIRST VOTAGE SOURCE, A SECOND VOLTAGE SOURCE, A FIRST PATH SERIALLY CONNECTING SAID INDUCITIVE LOAD AND ONE OF SAID SOURCES, SAID FIRST PATH COMPRISING A FIRST NORMALLY DISABLED GATE AND MEANS TO ISOLATE SAID FIRST PATH FROM SAID LOAD WHEN THE VOLTAGE ACROSS SAID LOAD EXCEEDS A PREDETERMINED LEVEL, A SECOND PATH SERIALLY CONNECTING SAID INDUCTIVE LOAD AND SAID SOURCES IN AN ADDITIVE SENSE, SAID SECOND PATH COMPRISING A SECOND NORMALLY DISABLED GATE DISTINCT FROM SAID FIRST GATE, A SERIALLY CONNECTED IMPEDANCE MEANS, AND MEANS RESPONSIVE TO AN INPUT SIGNAL TO ENABLE SAID SECOND GATE ONLY FOR AN INTERVAL TO ALLOW SAID INDUCTIVE LOAD CURRENT TO REACH SUBSTANTIALLY THE STEADY STATE VALUE OF THE INDUCTIVE LOAD CURRENT PRODUCED WHEN ONLY SAID FIRST PATH IS CONDUCTIVE, AND MEANS TO APPLY AN INPUT SIGNAL TO SAID FIRST GATE IN SAID FIRST PATH AND TO SAID MEANS RESPONSIVE TO AN INPUT SIGNAL IN SAID SECOND PATH.
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) | 1969-08-22 | 1970-02-21 | 1970-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-22 | 1974-02-21 | 1974-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-22 | 1978-02-21 | 1978-08-23 | $7700.00 | Window Closed / Lapsed |