US3078393A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Driver for inductive load
Assignee: AT&T Teletype Corp
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Filing: 1961-01-03
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Granted: 1963-02-19
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Expires: 1981-01-03
Abstract
No abstract record available.
Inventors
- 👤 Charles R Winston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:45
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/04; H03K17/042; H03K17/04213; H03K3/00; H03K3/02; H03K3/26; H04; H04L; H04L25/00; H04L25/02; H04L25/20; H04L25/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
159 words
AN INDUCTOR DRIVING CIRCUIT COMPRISING A VOLTAGE RESPONSIVE INPUT MEANS RESPONSIVE TO A PREDETERMINED POTENTIAL AND ABRUPTLY CHANGING FROM A NONCONDUCTING TO A CONDUCTING STATE WHEN THE PREDETERMINED VOLTAGE IS APPLIED THERETO AND ABRUPTLY CHANGING BACK TO THE ORIGINAL STATE WHEN THE VOLTAGE FALLS BELOW SAID PREDETERMINED MAGNITUDE, A CURRENT AMPLIFIER CONNECTED TO SAID VOLTAGE RESPONSIVE MEANS, A FIRST FEED-BACK LOOP CONNECTED FROM THE OUTPUT OF THE CURRENT AMPLIFIER TO THE VOLTAGE RESPONSIVE MEANS FOR CAUSING THE ABRUPT CHANGING OF SAID INPUT MEANS BETWEEN ITS CONDUCTING AND NONCONDUCTING STATES, AN INDUCTOR TO BE DRIVEN BY AND HAVING ONE TERMINAL THEREOF CONNECTED TO SAID CURRENT AMPLIFIER, A CONSTANT CURRENT AMPLIFIER CONNECTED TO THE OTHER TERMINAL OF SAID INDUCTOR, CONNECTING MEANS FORMING A SECOND FEED-BACK LOOP TO THE VOLTAGE RESPONSIVE INPUT MEANS FROM THE CONSTANT CURRENT AMPLIFIER FOR AIDING THE FIRST MENTIONED FEED-BACK LOOP, AND A DISCHARGE CIRCUIT FOR DISCHARGING THE INDUCTOR AFTER THE INPUT VOLTAGE FALLS BELOW THE PREDETERMINED MAGNITUDE.
Claim 2
Dependent Claim
159 words
AN INDUCTOR DRIVING CIRCUIT COMPRISING A VOLTAGE RESPONSIVE INPUT MEANS RESPONSIVE TO A PREDETERMINED POTENTIAL AND ABRUPTLY CHANGING FROM A NONCONDUCTING TO A CONDUCTING STATE WHEN THE PREDETERMINED VOLTAGE IS APPLIED THERETO AND ABRUPTLY CHANGING BACK TO THE ORIGINAL STATE WHEN THE VOLTAGE FALLS BELOW SAID PREDETERMINED MAGNITUDE, A CURRENT AMPLIFIER CONNECTED TO SAID VOLTAGE RESPONSIVE MEANS, A FIRST FEED-BACK LOOP CONNECTED FROM THE OUTPUT OF THE CURRENT AMPLIFIER TO THE VOLTAGE RESPONSIVE MEANS FOR CAUSING THE ABRUPT CHANGING OF SAID INPUT MEANS BETWEEN ITS CONDUCTING AND NONCONDUCTING STATES, AN INDUCTOR TO BE DRIVEN BY AND HAVING ONE TERMINAL THEREOF CONNECTED TO SAID CURRENT AMPLIFIER, A CONSTANT CURRENT AMPLIFIER CONNECTED TO THE OTHER TERMINAL OF SAID INDUCTOR, CONNECTING MEANS FORMING A SECOND FEED-BACK LOOP TO THE VOLTAGE RESPONSIVE INPUT MEANS FROM THE CONSTANT CURRENT AMPLIFIER FOR AIDING THE FIRST MENTIONED FEED-BACK LOOP, AND A DISCHARGE CIRCUIT FOR DISCHARGING THE INDUCTOR AFTER THE INPUT VOLTAGE FALLS BELOW THE PREDETERMINED MAGNITUDE.
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) | 1966-02-18 | 1966-08-20 | 1967-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-02-18 | 1970-08-20 | 1971-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-02-18 | 1974-08-20 | 1975-02-19 | $7700.00 | Window Closed / Lapsed |