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US 3,934,168 AGranted
Grid support means for a planar tube
AssigneeVarian Associates, Inc.
InventorsWendell G. Hardman, Werner Brunhart
Life of this patent
Estimating the term…
Abstract
A grid electrode for an electron tube with planar electrodes consists of a planar array of fine wires mounted on a support frame. The support frame has a circular outside rim and interconnected interior elements dividing the area inside the rim into three or more separated apertures. The interior elements include radial elements connected to non-radial elements, forming a mechanically rigid structure with good heat conduction to the outside rim which resists buckling out of its plane when differentially heated.
Claims9
An electron tube comprising;
- an envelope, a plurality of substantially planar and parallel electrodes, support means for said electrodes, and means for electrical connection to said electrodes, said electrodes comprising an electron emissive cathode, an electron collective anode, and at least one electron permeable grid between said cathode and said anode, said grid comprising a circular frame and an array of spaced wires, said frame comprising an outer rim interconnected with a web of support elements, said support elements having cross sections larger than said wires, said web having planar faces parallel to said cathode, said support elements comprising a plurality of radial elements connected to said rim and interconnected by non-radial elements lying entirely within said rim to form at least three enclosed apertures within said rim, said array of wires being joined to the face of said web facing said cathode, and covering said apertures.
Dependencies are inferred from the claim text.