US1994301A - Electric discharge tube - Google Patents

Electric discharge tube Download PDF

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Publication number
US1994301A
US1994301A US325198A US32519828A US1994301A US 1994301 A US1994301 A US 1994301A US 325198 A US325198 A US 325198A US 32519828 A US32519828 A US 32519828A US 1994301 A US1994301 A US 1994301A
Authority
US
United States
Prior art keywords
tube
mercury
discharge tube
rays
electric discharge
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
US325198A
Other languages
English (en)
Inventor
Bruijnes Johannes
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
Application granted granted Critical
Publication of US1994301A publication Critical patent/US1994301A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/12—Selection of substances for gas fillings; Specified operating pressure or temperature
    • H01J61/18—Selection of substances for gas fillings; Specified operating pressure or temperature having a metallic vapour as the principal constituent
    • H01J61/20—Selection of substances for gas fillings; Specified operating pressure or temperature having a metallic vapour as the principal constituent mercury vapour

Definitions

  • the invention relates to electric discharge tubes, more particularly to those adapted to emit rays, preferably ultra-violet rays, and having a gaseous filling which contains mercury vapour whilst they are preferably provided with an incandescent cathode.
  • the invention has for its object to obviate the said disadvantage or at any rate to reduce it to smaller proportions.
  • the discharge tube comprises a wall 1, for example of glass, and an incandescent cathode 2- which is secured to the stem3 of the tube. On this stem is also arranged an auxiliary electrode 4 which serves for the ignition. The current-- supply wires of the cathode and the auxiliary electrodes are let out through the stem 3.
  • Anodes 5 and 6 are arranged in side-arms 7 and 8 having stems 9 and. 10 through which the anodes are led out.
  • a tube 11 consisting of a material adapted totransmit ultra-violet rays, for example of quartz.
  • a tube 13 which is open at both ends.
  • the tube 1 contains a rare gas, for example,
  • the mercury which might condense during operation on the tube 11 is so small that the transcan be irradiated with ultra-violet light radiated from the discharge tube.
  • a mercury vapor lamp for the emission of ultra-violet rays comprising an elongated tube, a gaseous filling in said tube, at least one anode arranged adjacent one end. of the tube and laterally of the central axis thereof, a thermionic cathode at the other end of the tube, and a double tube formed at least in part of ultra-violet ray transparent material extending into the said first mentioned tube, the two parts of the said last mentioned tube being substantially concen- 1 trio and together forming a tortuous path for the material to be exposed to the ultra-violet radiation.
  • Mercury vapor lamp for the emission of ultraviolet rays
  • the wall of the lamp consisting at least partly of a material transparent to ultraviolet rays and being in contact with a cooling ultraviolet rays
  • the wall of the lamp consisting at least partly of a material transparent to ultraviolet rays and being in .contact with a cooling medium
  • the lamp consisting of an incandescent cathode, an anode, a gas filling and mercury which is wholly in the vaporized state at the operating temperature of the lamp, the mercury present in the lamp being so small that any-mercury which might be condensed in the lamp during operation is so'small that the transmissibility of the ultraviolet rays is not affected.
  • a mercury vapor lamp for the emissionof ultraviolet rays, the wall of the lamp comprised at least in part of a material transparent to ultraviolet rays and being in contact with a' cooling medium, the lamp consisting of an incandescent cathode, an anode, a gas filling, and a quantity of mercury which is wholly in the vaporized state, whereby copious quantities of ultraviolet rays are emitted during operation, the transmissibility for the .ultraviolet rays of the wall portion destined for the transmission of said rays being substantially unaffected by mercury which might condense during the operation on said wall portion.

Landscapes

  • Vessels And Coating Films For Discharge Lamps (AREA)
US325198A 1928-01-18 1928-12-11 Electric discharge tube Expired - Lifetime US1994301A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL1994301X 1928-01-18

Publications (1)

Publication Number Publication Date
US1994301A true US1994301A (en) 1935-03-12

Family

ID=19873451

Family Applications (1)

Application Number Title Priority Date Filing Date
US325198A Expired - Lifetime US1994301A (en) 1928-01-18 1928-12-11 Electric discharge tube

Country Status (3)

Country Link
US (1) US1994301A (ru)
BE (1) BE356705A (ru)
FR (1) FR666040A (ru)

Also Published As

Publication number Publication date
BE356705A (ru)
FR666040A (fr) 1929-09-26

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