US1926132A - Manufacture of electrical rectifiers - Google Patents

Manufacture of electrical rectifiers Download PDF

Info

Publication number
US1926132A
US1926132A US391986A US39198629A US1926132A US 1926132 A US1926132 A US 1926132A US 391986 A US391986 A US 391986A US 39198629 A US39198629 A US 39198629A US 1926132 A US1926132 A US 1926132A
Authority
US
United States
Prior art keywords
copper
blank
oxide
manufacture
treating
Prior art date
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
Application number
US391986A
Other languages
English (en)
Inventor
Donald G Ackerly
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.)
Hitachi Rail STS USA Inc
Original Assignee
Union Switch and Signal Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority to US926132D priority Critical patent/UST926132I4/en
Priority to BE373316D priority patent/BE373316A/xx
Application filed by Union Switch and Signal Inc filed Critical Union Switch and Signal Inc
Priority to US391985A priority patent/US1811603A/en
Priority to US391986A priority patent/US1926132A/en
Priority to DE1930543994D priority patent/DE543994C/de
Priority to GB24806/30A priority patent/GB367749A/en
Priority to FR701789D priority patent/FR701789A/fr
Application granted granted Critical
Publication of US1926132A publication Critical patent/US1926132A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
    • H10D48/00—Individual devices not covered by groups H10D1/00 - H10D44/00
    • H10D48/01—Manufacture or treatment
    • H10D48/07—Manufacture or treatment of devices having bodies comprising cuprous oxide [Cu2O] or cuprous iodide [CuI]
    • H10D48/071—Preparation of the foundation plate, preliminary treatment oxidation of the foundation plate or reduction treatment
    • H10D48/075—Reduction of the copper oxide or treatment of the oxide layer
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
    • H10D48/00—Individual devices not covered by groups H10D1/00 - H10D44/00
    • H10D48/01—Manufacture or treatment
    • H10D48/07—Manufacture or treatment of devices having bodies comprising cuprous oxide [Cu2O] or cuprous iodide [CuI]
    • H10D48/071—Preparation of the foundation plate, preliminary treatment oxidation of the foundation plate or reduction treatment
    • H10D48/076—Application of a non-genetic conductive layer

Definitions

  • One object of my invention is the provision of novel and improved means for producing metallic copper on the outer surface of the copper oxide in rectifiers of the type referred to.
  • a copper blank is first treated to form cuprous oxide thereon. This may be done, forexample, by heating the blank in an oxygen atmosphere to a temperature of approximately 1000 centigrade.
  • the treated blank is then placed in a nonaqueous electrolytic bath containing an inorganic salt to reduce the outer layer of the copper oxide to copper.
  • an inorganic salt to reduce the outer layer of the copper oxide to copper.
  • oneof the salts in this bath should be calcium chloride.
  • it should contain chlorides of some of the alkaline metals of the first group in theperiodic table, such as chlorides of sodium or potassium either. singly or in combination.
  • the addition of the latter salts has the effect of reducing the melting point of the mixture to such a value that it can be kept molten at the tempera- 3 ture that is desireddor quenching as hereinafter explained.
  • a typical mixture that has been found suitable is the eutectic formed by mixing 66% of calcium chloride with 6% of potassium chloride and 28% of sodium chloride- This mixture melts at 504 C.
  • the temperature of the electrolyte should be approximately 500 C. to 600 C.
  • the treated blank, when in the electrolyte, should be in contact with a piece of metal having a higher potential than copper in the electromotive series; this metal may conveniently be a piece of iron.
  • the iron then becomes the anode, and the oxidized blank becomes the cathode, the .circuit being completed through the electrolyte. No outside source of potential is required for this process. I have found that a time interval of approximately one minute is suflicient to form an adequate copper surface on the cuprous oxide.
  • the purpose of producing the layer of copper on the outer surface of the copper oxide is,i of
  • the electrolyte must be so chosen that it will function as a reducing agent at 500 to 600C.
  • the process of producing a' rectifier unit which consists in treating a copper blank to form cuprous oxide thereon, and treating the oxidized bla in a non-aqueous electrolytic bath containa ing calcium chloride at a temperature of 500 C. to 600 C. to reduce the outer surface of the oxide to copper.

Landscapes

  • Chemical Treatment Of Metals (AREA)
  • Braking Arrangements (AREA)
  • Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
  • Coating With Molten Metal (AREA)
US391986A 1929-09-11 1929-09-11 Manufacture of electrical rectifiers Expired - Lifetime US1926132A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
US926132D UST926132I4 (enrdf_load_stackoverflow) 1929-09-11
BE373316D BE373316A (enrdf_load_stackoverflow) 1929-09-11
US391985A US1811603A (en) 1929-09-11 1929-09-11 Manufacture of electrical rectifiers
US391986A US1926132A (en) 1929-09-11 1929-09-11 Manufacture of electrical rectifiers
DE1930543994D DE543994C (de) 1929-09-11 1930-08-14 Verfahren zur Herstellung von Gleichrichterelementen
GB24806/30A GB367749A (en) 1929-09-11 1930-08-19 Improvements relating to electrical current rectifying devices
FR701789D FR701789A (fr) 1929-09-11 1930-09-08 Perfectionnements dans les redresseurs de courant électrique

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US391985A US1811603A (en) 1929-09-11 1929-09-11 Manufacture of electrical rectifiers
US391986A US1926132A (en) 1929-09-11 1929-09-11 Manufacture of electrical rectifiers

Publications (1)

Publication Number Publication Date
US1926132A true US1926132A (en) 1933-09-12

Family

ID=27013711

Family Applications (3)

Application Number Title Priority Date Filing Date
US926132D Pending UST926132I4 (enrdf_load_stackoverflow) 1929-09-11
US391986A Expired - Lifetime US1926132A (en) 1929-09-11 1929-09-11 Manufacture of electrical rectifiers
US391985A Expired - Lifetime US1811603A (en) 1929-09-11 1929-09-11 Manufacture of electrical rectifiers

Family Applications Before (1)

Application Number Title Priority Date Filing Date
US926132D Pending UST926132I4 (enrdf_load_stackoverflow) 1929-09-11

Family Applications After (1)

Application Number Title Priority Date Filing Date
US391985A Expired - Lifetime US1811603A (en) 1929-09-11 1929-09-11 Manufacture of electrical rectifiers

Country Status (5)

Country Link
US (3) US1926132A (enrdf_load_stackoverflow)
BE (1) BE373316A (enrdf_load_stackoverflow)
DE (1) DE543994C (enrdf_load_stackoverflow)
FR (1) FR701789A (enrdf_load_stackoverflow)
GB (1) GB367749A (enrdf_load_stackoverflow)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2496721A (en) * 1945-10-19 1950-02-07 Westinghouse Electric Corp Rectifier
US2701285A (en) * 1951-04-03 1955-02-01 Gen Electric Electric cutout
US2739276A (en) * 1951-02-23 1956-03-20 Gen Electric Copper oxide rectifier and method of making the same
US2946727A (en) * 1955-10-20 1960-07-26 Condenser Machinery Corp Method for making electrolytic condensers

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2899345A (en) * 1959-08-11 Method of making titanium dioxide capacitors
JPS5810880B2 (ja) * 1979-08-30 1983-02-28 株式会社村田製作所 銅被膜の密着性向上方法

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2496721A (en) * 1945-10-19 1950-02-07 Westinghouse Electric Corp Rectifier
US2739276A (en) * 1951-02-23 1956-03-20 Gen Electric Copper oxide rectifier and method of making the same
US2701285A (en) * 1951-04-03 1955-02-01 Gen Electric Electric cutout
US2946727A (en) * 1955-10-20 1960-07-26 Condenser Machinery Corp Method for making electrolytic condensers

Also Published As

Publication number Publication date
DE543994C (de) 1932-02-12
BE373316A (enrdf_load_stackoverflow)
US1811603A (en) 1931-06-23
UST926132I4 (enrdf_load_stackoverflow)
GB367749A (en) 1932-02-25
FR701789A (fr) 1931-03-21

Similar Documents

Publication Publication Date Title
US1926132A (en) Manufacture of electrical rectifiers
US400664A (en) Process of reducing aluminium from its fluoride salts by electrolysis
US2266922A (en) Manufacture of alternating current rectifiers
US1867527A (en) Process for anodic removal of surface metal film
US2413411A (en) Process for producing iron powder
US2353026A (en) Metal-cleaning process and composition
US1834275A (en) Manufacture of copper oxide rectifiers
US2365177A (en) Process for refining lead or lead alloys
US2378761A (en) Cleaning oxides from steel
US2217422A (en) Glass-metal seal
US1538650A (en) Soda-lime composition of matter useful as a gas absorbent
JPS55141586A (en) Recovering method of lead
US2515148A (en) Method of preparing ferrous metal for heat-treatment
US2172576A (en) Manufacture of alternating elec
US1276977A (en) Method of coating metal articles.
US1548854A (en) Production of antimony
US948681A (en) Electrolytic separation of metal.
US1684684A (en) Electrolytic rectifier
US2139791A (en) Process of manufacturing dry rectifiers
US2678290A (en) Process of removing surface oxide films on metal
US939223A (en) Process for electrolytically removing iron-oxid scale.
US1447892A (en) Smelting and electrolytic process
US1485436A (en) Means for preventing occlusion of hydrogen in metal cathodes
US1966817A (en) Process of grooving laminated glass
SU630925A1 (ru) Флюс дл электрошлаковой обработки металлов и сплавов