Method for assembling a thermally-set getter spring in a CRT
AssigneeRCA Corporation
InventorEarle Solomon Thall
Life of this patent
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Abstract
A cathode-ray tube comprises a getter container supported on a metal spring which is attached to and extends from the electron-gun mount assembly. At least a portion of the spring consists of an alloy, such as 55-nitinol (an alloy of nickel and titanium), which can be thermally set to a first shape, then cold formed to a second shape, and then restores itself to the first shape upon being heated above a predetermined transition temperature. The method includes providing a spring which has been thermally set and then cold formed, attaching the container to the spring and the spring to the mount assembly, sealing the container and the mount assembly in the tube, and then heating the spring above the predetermined transition temperature.
Claims5
In a method for assembling a cathode-ray tube including an envelope, a mount assembly within said envelope and a getter container supported on a spring connected to and extending from said mount assembly, the steps comprising
- a. providing a spring at least a portion of which has been thermally set to a first shape and then cold formed to a second shape different from said first shape, said portion being of an alloy which restores itself to said first shape upon heating above a predetermined transition temperature,
- b. attaching said container to said spring,
- c. attaching said spring to said mount assembly,
- d. sealing said container and mount assembly in said envelope
- e. and then heating said spring above said predetermined transition temperature until said spring is restored to said first shape.
Dependencies are inferred from the claim text.