US894613A - Process of insulating electric conductors. - Google Patents

Process of insulating electric conductors. Download PDF

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Publication number
US894613A
US894613A US40094607A US1907400946A US894613A US 894613 A US894613 A US 894613A US 40094607 A US40094607 A US 40094607A US 1907400946 A US1907400946 A US 1907400946A US 894613 A US894613 A US 894613A
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US
United States
Prior art keywords
conducting
oxid
insulating
alloy
coating
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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US40094607A
Inventor
John T H Dempster
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
General Electric Co
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General Electric Co
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Filing date
Publication date
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Priority to US40094607A priority Critical patent/US894613A/en
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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
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
    • C23C8/08—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases only one element being applied
    • C23C8/10—Oxidising

Definitions

  • This invention relates to the insulating of Be it known that I, JOHN T. H. DEMPSTER,
  • my invention relates to the insulating of an alloy used as a resistance conductor.
  • Certain of the metals have oxids whichv are conducting while others are non-conducting.
  • I produce a coating upon the alloy by oxidizing the same and then treat the coating to 'remove the conducting portion of the oxid.
  • I have disclosed an alloy which has valuable properties as a resistance conductor.
  • This alloy contains principally nickel, iron, manganese and chromium.
  • the oxid of iron is conducting in its properties whilethe oxid of the chromium is highly insulating.
  • the oxids of nickel. and manganese while not highly conducting are also not in a high degree insulating.
  • I heat the same, preferablyin the form .of a wire or ribbonpinanoxidiz This produces a coating which, while it'insulates to a certain extent,
  • ELECTRIC- 2 The process of insulating an electrical conducting alloy, which consists in heating the same in an oxidizing atmosphere and then treating it toremove part of the oxid.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)

Description

JOHN T. H. DEMPSTER, or 'SCHENECTADY ,-NEW .YORK, ASSIGNOR To GENERAL COMPANY, A CORPORATION OF NEW YORK.
Specification of Letters Patent.
Patented July 28, 1908.
Application filed November 6, 1907. Serial No. 400,846.
7 T cll'whom it may concern:
sulating I This invention relates to the insulating of Be it known that I, JOHN T. H. DEMPSTER,
a citizen of the United States, residing at- Schenectady, county of Schenectady, State of New York, have invented certain new and useful Im rovements in the Processes of Inlectric Conductors.
electric conductors and has for its object the provision of means whereby an insulating coating may be applied in a thin tenacious film in a simple and eflicient manner.
More specifically my invention relates to the insulating of an alloy used as a resistance conductor.
Certain of the metals have oxids whichv are conducting while others are non-conducting.
In carrying out my invention I produce a coating upon the alloy by oxidizing the same and then treat the coating to 'remove the conducting portion of the oxid. In my co-pending application Serial No. 400,691, I have disclosed an alloy which has valuable properties as a resistance conductor. This alloy contains principally nickel, iron, manganese and chromium. The oxid of iron is conducting in its properties whilethe oxid of the chromium is highly insulating. 'The oxids of nickel. and manganese while not highly conducting are also not in a high degree insulating. In order to produce a coating of oxid upon the alloy, I heat the same, preferablyin the form .of a wire or ribbonpinanoxidiz This produces a coating which, while it'insulates to a certain extent,
would not be efiicient as an insulator since it contains conducting'oxids. 4 In order to remove these OXldS, the w re is boiled in dilute sulfuric acid. This removes the conducting oxids which in this case are iron, nickel and manganese, leaving the chromium oxid intact. This layer of chromium 'oxid is very tenacious and at the same time refractory so as to have a very high resistance against slagging.
While I have described my invention in connection with an alloy-of specific metals and have also described a particular process of treating the alloyto remove the conducting oxid, it should beunderstood that I do not limit my invention to the specific details l herein described except in so far as it is limited by the scope of the claims annexed hereto.
What I claim as new and desire to'secure by Letters Patent of the United States, is,
1. The process of insulating an electrical conducting alloy, which consists in oxidizing the same to form a coating thereon and then treating said coating to remove the conducting oxids.
ELECTRIC- 2. The process of insulating an electrical conducting alloy, which consists in heating the same in an oxidizing atmosphere and then treating it toremove part of the oxid.
3. The process of insulating an alloy of metals having conducting and non-conducting oxids, which consists in oxidizing the same to produce a coating thereon and then treating it to remove the conducting oxid.
4, The process of insulating an alloy of chromium and a metal having a conducting oxid, which consists in oxidizing the same to produce acoatingthereon and then treating it to remove the conducting oxid.
15 The process of insulatin an alloy containing chromium and iron, w ich consists in oxidizing the same to produce a coating thereon and then treating it to remove the conducting oxid.
6. The process of insulating an alloy con taining iron and a metal having a non-conducting oxid, which consists in oxidizing the same to'producea coating thereon and then treating it to remove the conducting oxid.
7. The process of insulating an alloy containing iron and a metal having a non-conducting oxid, which consists in oxidizing the same to produce a coating thereon and then treating it with sulfuric acid to remove the conducting oxid. i
8. The process of insulating an alloy con- -taining chromium and a metal having a conducting oxid, which consists in oxidizing the same to produce a coating thereon and then treating it with sulfuric acid to remove the conducting oxid 9. The process of insulating an alloy containing chromium and iron, which consists in i oxidizing the same to produce a coating thereon and then treating it with sulfuric acid to remove the conducting oxid.
In witness whereof, I have hereunto set my hand this 5th day of November, 1907.
JOHN T. H. DEMPSTER.
Witnesses:
4 'BENJAMIN B. HULL,
HELEN ORFORD.
US40094607A 1907-11-06 1907-11-06 Process of insulating electric conductors. Expired - Lifetime US894613A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US40094607A US894613A (en) 1907-11-06 1907-11-06 Process of insulating electric conductors.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US40094607A US894613A (en) 1907-11-06 1907-11-06 Process of insulating electric conductors.

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US894613A true US894613A (en) 1908-07-28

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US40094607A Expired - Lifetime US894613A (en) 1907-11-06 1907-11-06 Process of insulating electric conductors.

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2605775A (en) * 1947-02-21 1952-08-05 Superior Steel Corp Process of teating cold rolled straight chrome type stainless steel

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2605775A (en) * 1947-02-21 1952-08-05 Superior Steel Corp Process of teating cold rolled straight chrome type stainless steel

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