Thyratrons
AssigneeEnglish Electric Valve Company Limited
InventorsHugh Menown, Robert J. Wheldon
Life of this patent
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Abstract
A thyratron is provided with a baffled structure between its cathode and first control electrode. The baffled structure consists of a series (e.g. three) annular baffle plates, each having a central aperture aligned with the axis of the cathode, mounted on the end of a cylindrical heat shield surrounding the cathode. The final annular baffle plate, adjacent the first control electrode includes a solid disc within its central aperture.
Claims13
A thyratron including a thermionic cathode, at least a first control electrode, and a baffled structure arranged between said thermionic cathode and said first control electrode, said baffled structure comprising a plurality of baffled plates forming at least two transversely extending cavities connected to be at cathode potential.
In a thyratron assembly, the combination of:
- an evacuated envelope having a thermionic cathode disposed therewithin;
- a heat shield surrounding said cathode and presenting a recess defining an opening through which electrons emitted from said cathode may pass;
- a control electrode within said envelope and positioned in spaced relation from said heat shield beyond said opening defined thereby;
- and
- means defining at least two transversely extending cavities between said opening defined by the heat shield and said control electrode for enhancing the beneficial effects of said heat shield, said means comprising at least three baffle plates disposed in spaced, generally parallel relation to define said cavities therebetween, each plate having an opening aligned with said opening defined by the heat shield, and said baffle plates being electrically connected to each other and to said cathode so as to be electrically isolated from said control electrode while operating at the potential of said cathode.
Dependencies are inferred from the claim text.