Patent US4761892A successfully refreshed from Google Patents.
US4761892A
Expired / Lapsed
US
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Apparatus for measuring the length of electrodes in an electric furnace
Assignee: Outokumpu Oyj
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Filing: 1986-11-26
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Granted: 1988-08-09
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Expires: 2006-11-26
Abstract
Abstract The invention relates to an apparatus for measuring the length of the electrodes in an electric furnace, wherein by aid of the apparatus of the invention, into the furnace there is inserted a measuring rod which feels the end of the electrode in the furnace, and thus the distance of the electrode located in the material bed is detected with respect to the furnace bottom.
Inventors
- 👤 Martti J. Jankkila
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:47
CPC Classifications
H; H05; H05B; H05B7/00; H05B7/02; F; F27; F27B; F27B3/00; F27B3/10; F27D; F27D21/00; F27B3/08; F27B3/085
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
138 words
Apparatus for determining the position of the free end of an electrode in an electric furnace, comprising: a support frame, a feed mechanism connected to the support frame and comprising an elongate guide bar, a first holding member which is mounted to the guide bar so as to remain stationary with respect thereto, a second holding member, and drive means for moving the second holding member longitudinally of the guide bar, each of the holding members being operable selectively to grip or release a measuring rod, whereby a measuring rod fitted to the holding members can be advanced longitudinally of the guide bar by operating the drive means and the holding members, and a power member effective between the support frame and the feed mechanism for adjusting the orientation of the feed mechanism relative to the support frame.
Claim 2
Dependent Claim
138 words
Apparatus for determining the position of the free end of an electrode in an electric furnace, comprising: a support frame, a feed mechanism connected to the support frame and comprising an elongate guide bar, a first holding member which is mounted to the guide bar so as to remain stationary with respect thereto, a second holding member, and drive means for moving the second holding member longitudinally of the guide bar, each of the holding members being operable selectively to grip or release a measuring rod, whereby a measuring rod fitted to the holding members can be advanced longitudinally of the guide bar by operating the drive means and the holding members, and a power member effective between the support frame and the feed mechanism for adjusting the orientation of the feed mechanism relative to the support frame.
Claim 3
Dependent Claim
43 words
Apparatus according to claim 1, wherein the drive means for moving the second holding member include a chain and a carriage the carriage being movable longitudinally of the guide bar by the chain, and the second holding member is attached to the carriage.
Claim 4
Dependent Claim
18 words
Apparatus according to claim 1, wherein the drive means and the holding members are operable by pneumatic pressure.
Claim 5
Dependent Claim
13 words
Apparatus according to claim 1, wherein the power member comprises a hydraulic cylinder.
Claim 6
Dependent Claim
18 words
Apparatus according to claim 1, further comprising an angle indicator for indicating the orientation of the guide bar.
Claim 7
Independent Claim
140 words
A method for determining the position of the free end of an electrode in an electric furnace employing an elongate guide bar, a first holding member which is mounted to the guide bar so as to remain stationary with respect thereto, a second holding member, and drive means for moving the second holding member longitudinally of the guide bar, each of the holding members being operable selectively to grip or release a measuring rod, said method comprising disposing the guide bar outside the electric furnace, fitting a measuring rod in the first and second holding members, operating the drive means and the holding members to feed the measuring rod into the electric furnace, towards the free end of the electrode, and adjusting the orientation of the guide bar so that the guide bar engages the free end of the electrode.
Claim 8
Independent Claim
140 words
A method for determining the position of the free end of an electrode in an electric furnace employing an elongate guide bar, a first holding member which is mounted to the guide bar so as to remain stationary with respect thereto, a second holding member, and drive means for moving the second holding member longitudinally of the guide bar, each of the holding members being operable selectively to grip or release a measuring rod, said method comprising disposing the guide bar outside the electric furnace, fitting a measuring rod in the first and second holding members, operating the drive means and the holding members to feed the measuring rod into the electric furnace, towards the free end of the electrode, and adjusting the orientation of the guide bar so that the guide bar engages the free end of the electrode.
Claim 9
Dependent Claim
28 words
A method according to claim 6, comprising positioning the guide bar so that the first holding member is nearer to the furnace than is the second holding member.
Claim 10
Dependent Claim
18 words
A method according to claim 6, comprising operating the drive means and the holding members by pneumatic pressure.
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) | 1991-08-09 | 1992-02-08 | 1992-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-08-09 | 1996-02-08 | 1996-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-08-09 | 2000-02-08 | 2000-08-09 | $7700.00 | Window Closed / Lapsed |