Classifications

• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
  • H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
  • H01J29/94—Selection of substances for gas fillings; Means for obtaining or maintaining the desired pressure within the tube, e.g. by gettering
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
  • H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
  • H01J29/46—Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement
  • H01J29/58—Arrangements for focusing or reflecting ray or beam
  • H01J29/62—Electrostatic lenses
  • H01J29/622—Electrostatic lenses producing fields exhibiting symmetry of revolution
  • H01J29/624—Electrostatic lenses producing fields exhibiting symmetry of revolution co-operating with or closely associated to an electron gun

Applications Claiming Priority (1)

Publications (1)

Family

ID=6539435

Family Applications (1)

Country Status (4)

Families Citing this family (1)

• 0
  • BE BE409049D patent/BE409049A/xx unknown
• 1935
  • 1935-04-15 US US16431A patent/US2123160A/en not_active Expired - Lifetime
  • 1935-04-18 GB GB11941/35A patent/GB458401A/en not_active Expired
  • 1935-04-18 FR FR46095D patent/FR46095E/fr not_active Expired

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