GB1080600A - Improvements relating to spark gap devices - Google Patents

Improvements relating to spark gap devices

Info

Publication number
GB1080600A
GB1080600A GB50870/63A GB5087063A GB1080600A GB 1080600 A GB1080600 A GB 1080600A GB 50870/63 A GB50870/63 A GB 50870/63A GB 5087063 A GB5087063 A GB 5087063A GB 1080600 A GB1080600 A GB 1080600A
Authority
GB
United Kingdom
Prior art keywords
spark
spark gap
dec
electrodes
coated
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
Application number
GB50870/63A
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
Original Assignee
General Electric Co
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
Application filed by General Electric Co filed Critical General Electric Co
Publication of GB1080600A publication Critical patent/GB1080600A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/02—Details
    • H05B41/04—Starting switches
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J17/00—Gas-filled discharge tubes with solid cathode
    • H01J17/02—Details
    • H01J17/04—Electrodes; Screens
    • H01J17/06—Cathodes
    • H01J17/066—Cold cathodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
    • H01T1/00—Details of spark gaps
    • H01T1/24—Selection of materials for electrodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2893/00—Discharge tubes and lamps
    • H01J2893/0064—Tubes with cold main electrodes (including cold cathodes)
    • H01J2893/0065—Electrode systems
    • H01J2893/0066—Construction, material, support, protection and temperature regulation of electrodes; Electrode cups

Landscapes

  • Discharge Lamp (AREA)

Abstract

1,080,600. Spark gaps. GENERAL ELECTRIC CO. Dec. 24, 1963 [Dec. 27, 1962], No. 50870/63. Heading H1D. [Also in Division H2] A spark gap tube containing an inert gas, e.g. argon, at 25-500 mm. Hg has two electrodes not more than 5 mm. apart, each comprising a refractory metal coil coated with an electron emissive material, e.g. in the embodiment a tungsten shank (21) carrying inner (22) and outer (23) tungsten coils, e.g. 14 and 17 mil diameter respectively, coated with (24) barium thorate or zirconate applied as a suspension in ethyl alcohol or butyl acetate containing added thorium or zirconium, respectively, and heated to 800‹ C. under vacuum to yield free barium. This arrangement provides a spark gap having electrodes of high heat capacity and low heat dissipation in the spark, and is suitable for use with a high-pressure sodium vapour lamp having a relatively long narrow envelope operating at a high current density.
GB50870/63A 1962-12-27 1963-12-24 Improvements relating to spark gap devices Expired GB1080600A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US247633A US3275875A (en) 1962-12-27 1962-12-27 Spark tube having activated thermionic electrodes

Publications (1)

Publication Number Publication Date
GB1080600A true GB1080600A (en) 1967-08-23

Family

ID=22935678

Family Applications (1)

Application Number Title Priority Date Filing Date
GB50870/63A Expired GB1080600A (en) 1962-12-27 1963-12-24 Improvements relating to spark gap devices

Country Status (2)

Country Link
US (1) US3275875A (en)
GB (1) GB1080600A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1211706A (en) * 1967-02-22 1970-11-11 Thorn Lighting Ltd Discharge-lamp starting circuit
DE1589281B1 (en) * 1967-10-21 1971-01-28 Original Hanau Quarzlampen Ignition device for a gas discharge lamp immersed in a medium with a high dielectric constant
JPS57152661A (en) * 1981-03-16 1982-09-21 Toshiba Corp High pressure sodium lamp

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2098113A (en) * 1932-02-06 1937-11-02 Spaeth Charles Lamp and method of operating same
US2122932A (en) * 1934-03-23 1938-07-05 Ora S Duffendack Gaseous discharge tube
US2886737A (en) * 1949-11-11 1959-05-12 Fruengel Frank Quick-responsive spark gap device
US3132409A (en) * 1959-12-22 1964-05-12 Westinghouse Electric Corp Process for assembling electrodes

Also Published As

Publication number Publication date
US3275875A (en) 1966-09-27

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