US3364295A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control system for vacuum arc furnace
Assignee: NORBATROL ELECTRONICS CORP
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Filing: 1964-06-12
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Granted: 1968-01-16
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Expires: 1984-06-12
Abstract
No abstract record available.
Inventors
- 👤 Roland W Roberts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 03:38
CPC Classifications
H; H05; H05B; H05B7/00; H05B7/005
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
A CONTROL SYSTEM FOR CONTROLLING THE POSITION OF A RAM IN AN ARC MELTING FURNACE COMPRISING: (1) MEANS DETECTING VOLTAGE PULSES PRESENT ACROSS THE ARC; (2) MEANS QUANTIZING AND AMPLIFYING THE DETECTED VOLTAGE PULSES AND COUPLED TO THE MEANS DETECTING; (3) MEANS INTEGRATING THE DIFFERENCE BETWEEN THE AMPLIFIER QUANTIZED VOLTAGE PULSES AND A REFERENCE, THE MEANS INTEGRATING COUPLED TO THE MEANS QUANTIZING; AND (4) MEANS LINEARLY MOVING THE RAM AT A RATE DEPENDENT UPON THE INTEGRAL VOLTAGE FROM THE MEANS INTEGRATING.
Claim 2
Dependent Claim
81 words
A CONTROL SYSTEM FOR CONTROLLING THE POSITION OF A RAM IN AN ARC MELTING FURNACE COMPRISING: (1) MEANS DETECTING VOLTAGE PULSES PRESENT ACROSS THE ARC; (2) MEANS QUANTIZING AND AMPLIFYING THE DETECTED VOLTAGE PULSES AND COUPLED TO THE MEANS DETECTING; (3) MEANS INTEGRATING THE DIFFERENCE BETWEEN THE AMPLIFIER QUANTIZED VOLTAGE PULSES AND A REFERENCE, THE MEANS INTEGRATING COUPLED TO THE MEANS QUANTIZING; AND (4) MEANS LINEARLY MOVING THE RAM AT A RATE DEPENDENT UPON THE INTEGRAL VOLTAGE FROM THE MEANS INTEGRATING.
References Cited (Backward Citations)
US3188376A
Cited
US3187078A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-01-15 | 1971-07-17 | 1972-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-01-15 | 1975-07-17 | 1976-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-01-15 | 1979-07-17 | 1980-01-16 | $7700.00 | Window Closed / Lapsed |