US3209060A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical apparatus
Assignee: Westinghouse Electric Corp
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Filing: 1963-06-12
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Granted: 1965-09-28
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Expires: 1983-06-12
Abstract
No abstract record available.
Inventors
- 👤 Edwin J Borrebach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 00:24
CPC Classifications
H; H05; H05B; H05B7/00; H05B7/02; H05B7/144; H05B7/148; H05B7/152; Y; Y02; Y02P; Y02P10/00; Y02P10/25
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
ELECTRICAL CONTROL APPARATUS FOR CONTROLLING THE POSITION OF AN ELECTRODE IN AN ELECTRIC ARC FURNACE COMPRISING AMPLIFIER MEANS PRODUCING AN OUTPUT SIGNAL RESPONSIVE TO THE ALGEBRAIC SUM OF THE SIGNALS APPLIED TO IT, MEANS COMPRISING A SEMICONDUCTOR MULTIPLYING DEVICE ADAPTED FOR CONNECTION TO THE ELECTRIC ARC FURNACE TO OBTAIN A CONTROL SIGNAL RESPONSIBE TO THE PRODUCT OF THE INSTANTANEOUS CURRENT AND INSTANTANEOUS VOLTAGE OF THE ELECTRIC ARE FURNACE, SAID SEMICONDUCTRO MULTIPLYING DEVICE BEING CONNECTED TO APPLY SAID CONTROL SIGNAL TO SAID AMPLIFIER MEANS, AND MEANS APPLYING A REFERENCE SIGNAL TO SAID AMPLIFIER MEANS, THE OUTPUT SIGNAL OF SAID AMPLIFIER MEANS BEING RESPONSIVE TO THE DIFFERENCE BETWEEN SAID CONTROL SIGNAL AND SAID REFERENCE SIGNAL.
Claim 2
Dependent Claim
113 words
ELECTRICAL CONTROL APPARATUS FOR CONTROLLING THE POSITION OF AN ELECTRODE IN AN ELECTRIC ARC FURNACE COMPRISING AMPLIFIER MEANS PRODUCING AN OUTPUT SIGNAL RESPONSIVE TO THE ALGEBRAIC SUM OF THE SIGNALS APPLIED TO IT, MEANS COMPRISING A SEMICONDUCTOR MULTIPLYING DEVICE ADAPTED FOR CONNECTION TO THE ELECTRIC ARC FURNACE TO OBTAIN A CONTROL SIGNAL RESPONSIBE TO THE PRODUCT OF THE INSTANTANEOUS CURRENT AND INSTANTANEOUS VOLTAGE OF THE ELECTRIC ARE FURNACE, SAID SEMICONDUCTRO MULTIPLYING DEVICE BEING CONNECTED TO APPLY SAID CONTROL SIGNAL TO SAID AMPLIFIER MEANS, AND MEANS APPLYING A REFERENCE SIGNAL TO SAID AMPLIFIER MEANS, THE OUTPUT SIGNAL OF SAID AMPLIFIER MEANS BEING RESPONSIVE TO THE DIFFERENCE BETWEEN SAID CONTROL SIGNAL AND SAID REFERENCE SIGNAL.
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) | 1968-09-27 | 1969-03-29 | 1969-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-27 | 1973-03-29 | 1973-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-27 | 1977-03-29 | 1977-09-28 | $7700.00 | Window Closed / Lapsed |