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Method and apparatus for forming a multiple sectioned ring
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Method and apparatus for precision loading and welding of components in an electron device
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Method for forming a multiple sectional ring
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Tabbing machine
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Convergence assembly
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Focusing electrode with bent support arms to reduce high voltage arcing
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Electron gun with connector of alternate electrodes shielding intermediate electrode
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Heating circuit for vacuum tube
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Method of making a cathode-grid assembly
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Standby cathode heating circuit for vacuum tube
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Electron gun construction
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Control of electron emission
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