US3835232A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Charging means
Assignee: ABB Norden Holding AB
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Filing: 1972-11-22
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Granted: 1974-09-10
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Expires: 1992-11-22
Abstract
Abstract A tilting arc furnace has a roof through which liftable electrodes are passed and to which furnace material charging tubes are applied, both the electrodes and the charging tubes requiring to be removed free from the roof to permit tilting of the furnace. The electrodes have lifting arms and the tubes pass through the arms and above the arms have carriers which during the lifting action of the arms, are engaged by the arms so that the tubes are simultaneously lifted, both the electrodes and tubes lifting free from the furnace roof for tilting of the furnace.
Inventors
- 👤 J Marchner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:47
CPC Classifications
F; F27; F27B; F27B3/00; F27B3/10; F27B3/18; F27B3/183; F27D; F27D3/00; F27D3/18
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
92 words
A tilting arc furnace having a roof, at least one electrode liftably passed through said roof, a lifting electrode arm for lifting said electrode free from said roof to permit the furnace to tilt, and a furnace material charging tube connecting with said roof and requiring removal to permit the furnace to tilt; wherein the improvement comprises means for connecting said tube with said arm so that when the latter lifts said electrode free from said roof it also lifts said tube free from said roof to permit said furnace to tilt.
Claim 2
Dependent Claim
92 words
A tilting arc furnace having a roof, at least one electrode liftably passed through said roof, a lifting electrode arm for lifting said electrode free from said roof to permit the furnace to tilt, and a furnace material charging tube connecting with said roof and requiring removal to permit the furnace to tilt; wherein the improvement comprises means for connecting said tube with said arm so that when the latter lifts said electrode free from said roof it also lifts said tube free from said roof to permit said furnace to tilt.
Claim 3
Dependent Claim
46 words
The furnace of claim 1 in which said means is provided by said tube being vertical and passed through said arm with the tube provided with a carrier above said arm and engagable thereby when lifting said electrode to thereby also lift said carrier and tube.
Claim 4
Dependent Claim
26 words
The furnace of claim 2 in which said carrier is normally spaced above said arm to permit the latter''s electrode adjusting movement without engaging said carrier.
Claim 5
Dependent Claim
57 words
The furnace of claim 2 in which the furnace has a plurality of individually liftable electrodes and arms and each electrode has a cable, and screens are positioned to shield the cable of an electrode which is not lifted when another electrode is lifted to a position where it would otherwise radiate its heat to that cable.
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) | 1977-09-09 | 1978-03-11 | 1978-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-09 | 1982-03-11 | 1982-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-09 | 1986-03-11 | 1986-09-10 | $7700.00 | Window Closed / Lapsed |