Abstract A cathode structure for electron discharge tubes comprising parallel filament wires extending longitudinally in an axial plane of the tube with all wires carrying input current arranged as a group on one side of the center of the structure and all wires carrying output current arranged as a second group on the other side thereof, filament support rods having peripheral grooves at equally spaced intervals along the length thereof attached at one end to the filament wires and at the other end to respective coil springs, and thin metallic frames surrounding each group of filament support rods in planes perpendicular thereto such that the ends of opposing cantilever arms attached to the frames engage the peripheral grooves of the support rods to restrain lateral movement thereof while permitting longitudinal movement to allow the coil springs to compensate for thermal elongation and contraction of the filament wires.
A cathode structure for an electron discharge tube comprising: a linear array of parallel filament wires extending longitudinally in an axial plane of the tube, and segregated into two groups one on each side of the central axis; similarly aligned and segregated support rods having indentations in the outer diameter at equally spaced intervals along the longitudinal length of each roD and having one end attached to respective filament wires; coil springs located adjacent the other ends of the support rods and connected thereto; frame members surrounding each segregated group or support rods; and pairs of aligned, resilient cantilever arms having ends attached to a frame member and opposing ends nesting in the indentations of respective support rods thereby restraining lateral movement but allowing longitudinal movement of the support rods.
Claim 2
Dependent Claim
130 words
A cathode structure for an electron discharge tube comprising: a linear array of parallel filament wires extending longitudinally in an axial plane of the tube, and segregated into two groups one on each side of the central axis; similarly aligned and segregated support rods having indentations in the outer diameter at equally spaced intervals along the longitudinal length of each roD and having one end attached to respective filament wires; coil springs located adjacent the other ends of the support rods and connected thereto; frame members surrounding each segregated group or support rods; and pairs of aligned, resilient cantilever arms having ends attached to a frame member and opposing ends nesting in the indentations of respective support rods thereby restraining lateral movement but allowing longitudinal movement of the support rods.
Claim 3
Dependent Claim
23 words
A cathode structure as set forth in claim 1 wherein the indentations in the outer diameter of the support rods are circumferential grooves.
Claim 4
Dependent Claim
30 words
A cathode structure as set forth in claim 1 wherein said opposing ends of the cantilever arms are arcuate and partially encircle said indented portions of the respective support rods.
Claim 5
Dependent Claim
28 words
A cathode structure as set forth in claim 1 wherein said opposing ends of the cantilever arms extend to the full depth of said indentations at elevated temperatures.