US2930921A - Process of filling a discharge chamber with mercury and product - Google Patents

Process of filling a discharge chamber with mercury and product Download PDF

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Publication number
US2930921A
US2930921A US507183A US50718355A US2930921A US 2930921 A US2930921 A US 2930921A US 507183 A US507183 A US 507183A US 50718355 A US50718355 A US 50718355A US 2930921 A US2930921 A US 2930921A
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US
United States
Prior art keywords
mercury
chamber
filling
discharge chamber
product
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
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US507183A
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English (en)
Inventor
Cappelletti Carlo
Ekkers Gysbert Jacob
Meier Walter
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.)
Patelhold Patenverwertungs and Elektro-Holding AG
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Patelhold Patenverwertungs and Elektro-Holding AG
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
    • H01J9/38—Exhausting, degassing, filling, or cleaning vessels
    • H01J9/395—Filling vessels

Definitions

  • the process according to the present invention involves a further development of process ,(c) described above. It avoids the mentioned disadvantage of method (0) by immediately chemically binding the oxygen liberated by the decomposition of the mercury oxide.
  • ac- The iron present'in the mixture serves to moderate the otherwise explosive reaction.
  • a suitable'ratio of the ingredients of the mixture is 1 part by weight of the mercury oxide, 1 part by weight of zirconium and 2 parts by weight of iron.
  • zirconium any other reducing agent may be used which is not vaporized at the reaction temperature. 'Zirconium is especially adapted for economical use. In place of iron other metals may be used such as nickel, manganese, chromium or cobalt.
  • a support is provided within the chamber and a compressed pill formed of the above mentioned materials in powdered form is secured to the support.
  • the chamber is then evacuated in the known manner at a temperature of, for example, 400 C.
  • the carrier alone is heated to about 700 C. to start the reaction.
  • the carrier advantageously can be made of nickel which is easy to degas.
  • the mercury which is liberated and vaporized by the reaction condenses on the cold parts of the chamber. The amount of mercury which is lost through the pump is not worth mentioning. There is no other gaseous or volatile material which remains to be pumped out or which will contaminate the chamber.
  • the reaction residue forms a coherent, hard sinter of ZrO Zr, Fe O and Fe. Consequently the chamber can be sealed shortly after the burning of the pill.
  • the purity of the mercury generated and released by the mixture depends upon the use of pure mercury oxide.
  • An especial advantage of the simple and inexpensive process is the accurate dosability'of the mercury oxide.
  • a discharge chamber made in accordance with the invention is generally characterized in that it containsthe carrier or support upon which a sinter body has been formed, said sinter body containing the oxide of the reducing agent, unconsumed reducing agent and oxide of the metal used to moderate the reaction.
  • the discharge chamber referred to above 2 is the electrode, 3 is the electrode -support,'4 is the support for the mixture of mercury oxide, reducing agent and reaction retarder and 5 is a compressed pill of said mixture.
  • Process for filling a discharge chamber with me cury which comprises supporting therein a mixture of mercury oxide, a first metallic reducing agent capable of thermite type reaction with the mercury oxide to liberate mercury and form a stable, non-volatile oxide thereof, said reducing agent being not volatile at the reaction 7 temperature, and a second metallic reducing agent capable of moderating said thermite type reaction, evacuating the chamber and heating said mixture to a temperature suflicient to initiate said thermite reaction.
  • a process of filling a discharge chamber with mercury which comprises supporting therein a mixture of v. mercury oxide, zirconium and iron, evacuating the cham- References Cited in the file of this patent UNITED STATES PATENTS 1,780,504 Risler Nov. 4, 1930 1,855,901 Bareiss et a1. Apr. 26, 1932 1,878,159 Mailey Sept. 20, 1932 Kuhne et a1. July 23, 1940

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Inorganic Compounds Of Heavy Metals (AREA)
  • Compounds Of Iron (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
US507183A 1954-05-28 1955-05-09 Process of filling a discharge chamber with mercury and product Expired - Lifetime US2930921A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH798751X 1954-05-28

Publications (1)

Publication Number Publication Date
US2930921A true US2930921A (en) 1960-03-29

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ID=4537492

Family Applications (1)

Application Number Title Priority Date Filing Date
US507183A Expired - Lifetime US2930921A (en) 1954-05-28 1955-05-09 Process of filling a discharge chamber with mercury and product

Country Status (6)

Country Link
US (1) US2930921A (fr)
CH (1) CH319397A (fr)
DE (1) DE1020122B (fr)
FR (1) FR1125256A (fr)
GB (1) GB798751A (fr)
NL (1) NL98429C (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3230027A (en) * 1962-03-28 1966-01-18 Hivac Ltd Method of constructing cold cathode gas discharge tubes
US3385645A (en) * 1966-03-24 1968-05-28 Westinghouse Electric Corp Method of dosing the arc tube of a mercury-additive lamp
US3401296A (en) * 1964-04-29 1968-09-10 Csf Mercury vapor generating means for discharge tubes
US4553067A (en) * 1982-02-10 1985-11-12 Gte Products Corporation Method of dispensing mercury into a fluorescent lamp and lamp to operate with method

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1186557B (de) * 1962-03-28 1965-02-04 Hivac Ltd Verfahren zur Herstellung einer Quecksilber enthaltenden Kaltkathoden-Gasentladungsroehre
DE10117365A1 (de) * 2001-04-06 2002-10-10 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Niederdruckentladungslampe

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1780504A (en) * 1927-06-03 1930-11-04 Risler Corp Of America Rectifying tube
US1855901A (en) * 1929-08-21 1932-04-26 Gen Electric Process for introducing mercury into discharge tubes and apparatus therefor
US1878159A (en) * 1929-01-12 1932-09-20 Gen Electric Vapor Lamp Co Gas or vapor electric device and method of controlling the same
US2208987A (en) * 1938-05-24 1940-07-23 Gen Electric Electric incandescent lamp

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE519079C (de) * 1929-08-22 1931-02-23 Aeg Verfahren zum Einbringen von Quecksilber in Entladungsroehren
DE916552C (de) * 1943-12-09 1954-08-12 Patra Patent Treuhand Verfahren zum Einbringen von Quecksilber in elektrische Entladungsgefaesse

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1780504A (en) * 1927-06-03 1930-11-04 Risler Corp Of America Rectifying tube
US1878159A (en) * 1929-01-12 1932-09-20 Gen Electric Vapor Lamp Co Gas or vapor electric device and method of controlling the same
US1855901A (en) * 1929-08-21 1932-04-26 Gen Electric Process for introducing mercury into discharge tubes and apparatus therefor
US2208987A (en) * 1938-05-24 1940-07-23 Gen Electric Electric incandescent lamp

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3230027A (en) * 1962-03-28 1966-01-18 Hivac Ltd Method of constructing cold cathode gas discharge tubes
US3401296A (en) * 1964-04-29 1968-09-10 Csf Mercury vapor generating means for discharge tubes
US3385645A (en) * 1966-03-24 1968-05-28 Westinghouse Electric Corp Method of dosing the arc tube of a mercury-additive lamp
US4553067A (en) * 1982-02-10 1985-11-12 Gte Products Corporation Method of dispensing mercury into a fluorescent lamp and lamp to operate with method

Also Published As

Publication number Publication date
FR1125256A (fr) 1956-10-29
NL98429C (fr)
DE1020122B (de) 1957-11-28
CH319397A (de) 1957-02-15
GB798751A (en) 1958-07-23

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