Apparatus for preventing or alternatively restricting the discharge of anions and X-rays from the front side of cathode ray tubes
OwnerHelmut R. Roederinventor
Life of this patent
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Abstract
On the rear wall of a cathode ray tube a metal disc system is arranged adjacent to the longitudinal axis of the tube, which metal disc system acts as an eddy current brake. The metal disc is substantially vertical to the rear wall, its diameter in a special embodiment is 60 mm and is arranged within a circle of about 500 mm diameter around the longitudinal axis of the tube parallel to the axis of the tube bulb. The metal disc preferably is of conductive metal, for instance aluminium or copper.
Claims8
An apparatus for preventing or alternatively decreasing the discharge of anions and x-rays at the front screen of cathode ray tubes, the tubes including a rear wall, comprising:
- a disc system affixed to the rear wall of the cathode ray tube adjacent to the longitudinal axis of the cathode ray tube outside of the cathode, whereby said disc system acts as an eddy current brake.
Dependencies are inferred from the claim text.