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US4448660A Expired / Lapsed US ⏱️ 0.0 years remaining

Monitoring apparatus

Assignee: De Nora Deutschland GmbH
•
Filing: 1982-06-17
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Granted: 1984-05-15
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Expires: 2002-06-17
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Abstract

Abstract A monitoring and control apparatus for flowing mercury electrolytic cells by measurement of the voltage drop in the shunted feed line of each electrode group comprising taps at the ends of a measured section of electrical bus bars for each electrode group electrically connected to a measuring means whereby the measured voltage drop is fed as an amplified signal to the measuring means, a control means set for a value from the total cell current divided by the number of taps comparing the actual measured values at various feed lines and a signal means activated when a set excess current is exceeded and to actuate the adjusters for a group of electrodes to lift the electrodes stepwise by an adjustable amount until excess current is not measured by comparison indicating that the feed line is no longer overloaded and a method of monitoring electric current in a mercury cell.

Inventors

  • 👤 Peter Fabian

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-29 19:09
CPC Classifications
C; C25; C25B; C25B15/00; C25B15/04

Claims Analysis

Total Claims: 5
Claim 1
Independent Claim 144 words
A monitoring and control apparatus for a single flowing mercury electrolytic cell by measurements of the voltage drop in the shunted feed line of each metal anode group comprising taps at the ends of a measured section of electrical bus bars for each metal anode group electrically connected to a measuring means whereby the measured voltage drop is fed as an amplified signal to the measuring means, a control means set for a value from the total cell current divided by the number of taps comparing the actual measured values at various feed lines and a signal means activated when a set excess current is exceeded and to actuate the adjusters for a group of metal anodes to lift the metal anodes stepwise by an adjustable amount until excess current is not measured by comparison indicating that the feed line is no longer overloaded.
Claim 2
Dependent Claim 144 words
A monitoring and control apparatus for a single flowing mercury electrolytic cell by measurements of the voltage drop in the shunted feed line of each metal anode group comprising taps at the ends of a measured section of electrical bus bars for each metal anode group electrically connected to a measuring means whereby the measured voltage drop is fed as an amplified signal to the measuring means, a control means set for a value from the total cell current divided by the number of taps comparing the actual measured values at various feed lines and a signal means activated when a set excess current is exceeded and to actuate the adjusters for a group of metal anodes to lift the metal anodes stepwise by an adjustable amount until excess current is not measured by comparison indicating that the feed line is no longer overloaded.
Claim 3
Dependent Claim 28 words
An apparatus of claim 1 wherein the actuators for metal anode groups are driven stepwise after comparison with the average value until excess current is not measured anymore.
Claim 4
Dependent Claim 16 words
An apparatus of claim 1 or 2 wherein the nominal and actual values are digitally displayed.
Claim 5
Dependent Claim 31 words
An apparatus of claim 1 or 2 wherein the feed line with excess current range is indicated after correction of the cause until the cell is adjusted to the proper voltage.

References Cited (Backward Citations)

US3654118A Cited
US4004989A Cited
US4098666A Cited
US4098639A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1987-05-15 1987-11-14 1988-05-15 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1991-05-15 1991-11-14 1992-05-15 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1995-05-15 1995-11-14 1996-05-15 $7700.00 Window Closed / Lapsed

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