Mechanically adjustable electron gun apparatus
AssigneeRCA Corporation
InventorsGeorge Herbert Needham Riddle, Robert Richard Demers
Life of this patent
Estimating the term…
Abstract
An electron gun apparatus comprises a cathode subassembly which is movably mounted relative to a fixedly mounted and registered grid/anode subassembly to permit mechanical adjustment of the cathode with respect to the grid/anode subassembly. An evacuated chamber, including resilient bellows interconnecting the movably mounted cathode assembly to the fixedly mounted grid/anode subassembly for permitting the mechanical adjustment, houses the cathode and the grid/anode subassemblies. Means are provided for electrical energization of the cathode, the grid, and the anode. According to a further feature of the invention, the cathode comprises a line filament, and the grid and the anode are slotted for providing an elongated line image.
Claims8
A mechanically adjustable electron gun apparatus comprising:
- 1. an evacuable chamber;
- 2. an electron gun pedestal located within said evacuable chamber;
- 3. a cathode subassembly including a cathode for providing a beam of electrons along an axis of said electron gun;
- 4. a grid/anode subassembly including:
- A. a grid having an aperture;
- B. an anode having an aperture;
- and
- C. means for fixedly mounting said grid to said anode;
- said mounting means serving to establish and maintain said apertures of said grid and said anode in spatial registration, while electrically isolating said grid from said anode;
- 5. means for securing said grid/anode subassembly to said electron gun pedestal;
- said grid/anode subassembly securing means serving, in common, to fixedly locate positions of said registered apertures of said grid and said anode within said evacuable chamber;
- 6. means, independent of said grid, said anode and said grid/anode subassembly securing means, for movably supporting said cathode subassembly with respect to said electron gun pedestal;
- said cathode subassembly supporting means permitting the mechanical adjustment of the location of said cathode within said evacuable chamber with respect to said fixedly located positions of said apertures without disturbing the registration of said apertures;
- 7. means for selectively evacuating said evacuable chamber;
- and
- 8. means for selectively energizing said anode, said grid and said cathode.
A mechanically adjustable electron gun apparatus comprising:
- 1. an evacuable chamber;
- 2. an electron gun pedestal within said evacuable chamber;
- 3. a cathode subassembly including a cathode for providing a beam of electrons along an axis of said electron gun;
- 4. a grid/anode subassembly including:
- A. a grid having an aperture;
- B. an anode having an aperture;
- and
- C. means for fixedly mounting said grid to said anode;
- said mounting means serving to establish and maintain said apertures of said grid and said anode in spatial registration, while electrically isolating said grid from said anode;
- 5. means for securing said grid/anode subassembly to said electron gun pedestal;
- said grid/anode subassembly securing means serving, in common, to fixedly locate positions of said registered apertures of said grid and said anode within said evacuable chamber;
- 6. means, independent of said grid, said anode and said grid/anode subassembly securing means, for movably supporting said cathode subassembly with respect to said electron gun pedestal;
- said cathode subassembly supporting means permitting the mechanical adjustment of the location of said cathode within said evacuable chamber with respect to said fixedly located positions of said apertures without disturbing the registration of said apertures;
- 7. means for selectively evacuating said evacuable chamber;
- 8. means for selectively energizing said anode, said grid and said cathode;
- and
- 9. means, operable from regions external to said evacuable chamber, for causing said mechanical adjustment of the location of said cathode.
Dependencies are inferred from the claim text.