Classifications

• • C—CHEMISTRY; METALLURGY
  • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
  • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
  • C23F13/00—Inhibiting corrosion of metals by anodic or cathodic protection
  • C23F13/02—Inhibiting corrosion of metals by anodic or cathodic protection cathodic; Selection of conditions, parameters or procedures for cathodic protection, e.g. of electrical conditions
  • C23F13/04—Controlling or regulating desired parameters
• • G—PHYSICS
  • G05—CONTROLLING; REGULATING
  • G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
  • G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
  • G05F1/10—Regulating voltage or current
  • G05F1/12—Regulating voltage or current wherein the variable actually regulated by the final control device is ac
  • G05F1/14—Regulating voltage or current wherein the variable actually regulated by the final control device is ac using tap transformers or tap changing inductors as final control devices
  • G05F1/147—Regulating voltage or current wherein the variable actually regulated by the final control device is ac using tap transformers or tap changing inductors as final control devices with motor driven tap switch
  • G05F1/153—Regulating voltage or current wherein the variable actually regulated by the final control device is ac using tap transformers or tap changing inductors as final control devices with motor driven tap switch controlled by discharge tubes or semiconductor devices

Landscapes

• Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Power Engineering (AREA)
• Materials Engineering (AREA)
• General Physics & Mathematics (AREA)
• Radar, Positioning & Navigation (AREA)
• Automation & Control Theory (AREA)
• Electromagnetism (AREA)
• Physics & Mathematics (AREA)
• Mechanical Engineering (AREA)
• Metallurgy (AREA)
• Organic Chemistry (AREA)
• Prevention Of Electric Corrosion (AREA)
• Emergency Protection Circuit Devices (AREA)
• Organic Insulating Materials (AREA)
• Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Applications Claiming Priority (1)

Publications (1)

Family

ID=10252696

Family Applications (1)

Country Status (10)

Families Citing this family (5)

Family Cites Families (6)

• 1977
  • 1977-06-28 GB GB27009/77A patent/GB1589739A/en not_active Expired
  • 1977-09-26 US US05/836,543 patent/US4147608A/en not_active Expired - Lifetime
  • 1977-09-28 NO NO773332A patent/NO773332L/no unknown
  • 1977-10-04 NL NL7710845A patent/NL7710845A/xx not_active Application Discontinuation
  • 1977-10-14 ES ES463210A patent/ES463210A1/es not_active Expired
  • 1977-10-14 BR BR7706869A patent/BR7706869A/pt unknown
  • 1977-10-17 IT IT28678/77A patent/IT1087786B/it active
  • 1977-10-19 AR AR269651A patent/AR225399A1/es active
  • 1977-10-19 FR FR7732004A patent/FR2396094A1/fr active Granted
  • 1977-10-20 JP JP52126381A patent/JPS6011111B2/ja not_active Expired

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